preload-0.6.4/0000777000076400007640000000000011171453167010172 500000000000000preload-0.6.4/COPYING0000664000076400007640000004311011077747204011145 00000000000000 GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with Subsection b above.) The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable. If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance. 5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Library General Public License instead of this License. preload-0.6.4/THANKS0000664000076400007640000000041011077747205011022 00000000000000The Fedora Project Chris DiBona and the Google Summer of Code Program team Ziga Mahkovec Soeren Sandmann Arjan van de Ven bert hubert Elliot Lee preload-0.6.4/src/0000777000076400007640000000000011171453176010761 500000000000000preload-0.6.4/src/state.c0000664000076400007640000006630211112620517012160 00000000000000/* state.c - preload persistent state handling routines * * Copyright (C) 2005,2008 Behdad Esfahbod * * This file is part of preload. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301 USA */ #include "common.h" #include "log.h" #include "state.h" #include "conf.h" #include "proc.h" #include "spy.h" #include "prophet.h" #include /* horrible hack to shut the double-declaration of g_snprintf up may * be removed after development is done. pretty harmless though. */ #define __G_PRINTF_H__ #include preload_state_t state[1]; preload_map_t * preload_map_new (const char *path, size_t offset, size_t length) { preload_map_t *map; g_return_val_if_fail (path, NULL); map = g_malloc (sizeof (*map)); map->path = g_strdup (path); map->offset = offset; map->length = length; map->refcount = 0; map->update_time = state->time; map->block = -1; return map; } void preload_map_free (preload_map_t *map) { g_return_if_fail (map); g_return_if_fail (map->refcount == 0); g_return_if_fail (map->path); g_free (map->path); map->path = NULL; g_free (map); } static void preload_state_register_map (preload_map_t *map) { g_return_if_fail (!g_hash_table_lookup (state->maps, map)); map->seq = ++(state->map_seq); g_hash_table_insert (state->maps, map, GINT_TO_POINTER (1)); g_ptr_array_add (state->maps_arr, map); } static void preload_state_unregister_map (preload_map_t *map) { g_return_if_fail (g_hash_table_lookup (state->maps, map)); g_ptr_array_remove (state->maps_arr, map); g_hash_table_remove (state->maps, map); } void preload_map_ref (preload_map_t *map) { if (!map->refcount) preload_state_register_map (map); map->refcount++; } void preload_map_unref (preload_map_t *map) { g_return_if_fail (map); g_return_if_fail (map->refcount > 0); map->refcount--; if (!map->refcount) { preload_state_unregister_map (map); preload_map_free (map); } } size_t preload_map_get_size (preload_map_t *map) { g_return_val_if_fail (map, 0); return map->length; } guint preload_map_hash (preload_map_t *map) { g_return_val_if_fail (map, 0); g_return_val_if_fail (map->path, 0); return g_str_hash (map->path) + g_direct_hash (GSIZE_TO_POINTER (map->offset)) + g_direct_hash (GSIZE_TO_POINTER (map->length)); } gboolean preload_map_equal (preload_map_t *a, preload_map_t *b) { return a->offset == b->offset && a->length == b->length && !strcmp (a->path, b->path); } preload_exemap_t * preload_exemap_new (preload_map_t *map) { preload_exemap_t *exemap; g_return_val_if_fail (map, NULL); preload_map_ref (map); exemap = g_malloc (sizeof (*exemap)); exemap->map = map; exemap->prob = 1.0; return exemap; } void preload_exemap_free (preload_exemap_t *exemap) { g_return_if_fail (exemap); if (exemap->map) preload_map_unref (exemap->map); g_free (exemap); } typedef struct _exemap_foreach_context_t { preload_exe_t *exe; GHFunc func; gpointer data; } exemap_foreach_context_t; static void exe_exemap_callback (preload_exemap_t *exemap, exemap_foreach_context_t *ctx) { ctx->func (exemap, ctx->exe, ctx->data); } static void exe_exemap_foreach (gpointer G_GNUC_UNUSED key, preload_exe_t *exe, exemap_foreach_context_t *ctx) { ctx->exe = exe; g_set_foreach (exe->exemaps, (GFunc)exe_exemap_callback, ctx); } void preload_exemap_foreach (GHFunc func, gpointer user_data) { exemap_foreach_context_t ctx; ctx.func = func; ctx.data = user_data; g_hash_table_foreach (state->exes, (GHFunc)exe_exemap_foreach, &ctx); } preload_markov_t * preload_markov_new (preload_exe_t *a, preload_exe_t *b, gboolean initialize) { preload_markov_t *markov; g_return_val_if_fail (a, NULL); g_return_val_if_fail (b, NULL); g_return_val_if_fail (a != b, NULL); markov = g_malloc (sizeof (*markov)); markov->a = a; markov->b = b; if (initialize) { markov->state = markov_state (markov); markov->change_timestamp = state->time; if (a->change_timestamp > 0 && b->change_timestamp > 0) { if (a->change_timestamp < state->time) markov->change_timestamp = a->change_timestamp; if (b->change_timestamp < state->time && b->change_timestamp > markov->change_timestamp) markov->change_timestamp = a->change_timestamp; if (a->change_timestamp > markov->change_timestamp) markov->state ^= 1; if (b->change_timestamp > markov->change_timestamp) markov->state ^= 2; } markov->time = 0; memset (markov->time_to_leave, 0, sizeof (markov->time_to_leave)); memset (markov->weight, 0, sizeof (markov->weight)); preload_markov_state_changed (markov); } g_set_add (a->markovs, markov); g_set_add (b->markovs, markov); return markov; } void preload_markov_state_changed (preload_markov_t *markov) { int old_state, new_state; if (markov->change_timestamp == state->time) return; /* already taken care of */ old_state = markov->state; new_state = markov_state (markov); g_return_if_fail (old_state != new_state); markov->weight[old_state][old_state]++; markov->time_to_leave[old_state] += ((state->time - markov->change_timestamp) - markov->time_to_leave[old_state]) / markov->weight[old_state][old_state]; markov->weight[old_state][new_state]++; markov->state = new_state; markov->change_timestamp = state->time; } void preload_markov_free (preload_markov_t *markov, preload_exe_t *from) { g_return_if_fail (markov); if (from) { preload_exe_t *other; g_assert (markov->a == from || markov->b == from); other = markov_other_exe (markov, from); g_set_remove (other->markovs, markov); } else { g_set_remove (markov->a->markovs, markov); g_set_remove (markov->b->markovs, markov); } g_free (markov); } typedef struct _markov_foreach_context_t { preload_exe_t *exe; GFunc func; gpointer data; } markov_foreach_context_t; static void exe_markov_callback (preload_markov_t *markov, markov_foreach_context_t *ctx) { /* each markov should be processed only once, not twice */ if (ctx->exe == markov->a) ctx->func (markov, ctx->data); } static void exe_markov_foreach (gpointer G_GNUC_UNUSED key, preload_exe_t *exe, markov_foreach_context_t *ctx) { ctx->exe = exe; g_set_foreach (exe->markovs, (GFunc)exe_markov_callback, ctx); } void preload_markov_foreach (GFunc func, gpointer user_data) { markov_foreach_context_t ctx; ctx.func = func; ctx.data = user_data; g_hash_table_foreach (state->exes, (GHFunc)exe_markov_foreach, &ctx); } /* calculate the correlation coefficient of the two random variable of * the exes in this markov been running. * * the returned value is a number in the range -1 to 1 that is a numeric * measure of the strength of linear relationship between two random * variables. the correlation is 1 in the case of an increasing linear * relationship, −1 in the case of a decreasing linear relationship, and * some value in between in all other cases, indicating the degree of * linear dependence between the variables. the closer the coefficient * is to either −1 or 1, the stronger the correlation between the variables. * see: * * http://en.wikipedia.org/wiki/Correlation * * we calculate the Pearson product-moment correlation coefficient, which * is found by dividing the covariance of the two variables by the product * of their standard deviations. that is: * * * E(AB) - E(A)E(B) * ρ(a,b) = ___________________________ * ____________ ____________ * √ E(A²)-E²(A) √ E(B²)-E²(B) * * * Where A and B are the random variables of exes a and b being run, with * a value of 1 when running, and 0 when not. It's obvious to compute the * above then, since: * * E(AB) = markov->time / state->time * E(A) = markov->a->time / state->time * E(A²) = E(A) * E²(A) = E(A)² * (same for B) */ double preload_markov_correlation (preload_markov_t *markov) { double correlation, numerator, denominator2; int t, a, b, ab; t = state->time; a = markov->a->time; b = markov->b->time; ab = markov->time; if (a == 0 || a == t || b == 0 || b == t) correlation = 0; else { numerator = ((double)t*ab) - ((double)a * b); denominator2 = ((double)a * b) * ((double)(t - a) * (t - b)); correlation = numerator / sqrt (denominator2); } g_assert (fabs (correlation) <= 1.00001); return correlation; } static void exe_add_map_size (preload_exemap_t *exemap, preload_exe_t *exe) { exe->size += preload_map_get_size (exemap->map); } preload_exe_t * preload_exe_new (const char *path, gboolean running, GSet *exemaps) { preload_exe_t *exe; g_return_val_if_fail (path, NULL); exe = g_malloc (sizeof (*exe)); exe->path = g_strdup (path); exe->size = 0; exe->time = 0; exe->change_timestamp = state->time; if (running) { exe->update_time = exe->running_timestamp = state->last_running_timestamp; } else { exe->update_time = exe->running_timestamp = -1; } if (!exemaps) exe->exemaps = g_set_new (); else exe->exemaps = exemaps; g_set_foreach (exe->exemaps, (GFunc)exe_add_map_size, exe); exe->markovs = g_set_new (); return exe; } void preload_exe_free (preload_exe_t *exe) { g_return_if_fail (exe); g_return_if_fail (exe->path); g_set_foreach (exe->exemaps, (GFunc)preload_exemap_free, NULL); g_set_free (exe->exemaps); exe->exemaps = NULL; g_set_foreach (exe->markovs, (GFunc)preload_markov_free, exe); g_set_free (exe->markovs); exe->markovs = NULL; g_free (exe->path); exe->path = NULL; g_free (exe); } preload_exemap_t * preload_exe_map_new (preload_exe_t *exe, preload_map_t *map) { preload_exemap_t *exemap; g_return_val_if_fail (exe, NULL); g_return_val_if_fail (map, NULL); exemap = preload_exemap_new (map); g_set_add (exe->exemaps, exemap); exe_add_map_size (exemap, exe); return exemap; } static void shift_preload_markov_new (gpointer G_GNUC_UNUSED key, preload_exe_t *a, preload_exe_t *b) { if (a != b) preload_markov_new (a, b, TRUE); } void preload_state_register_exe (preload_exe_t *exe, gboolean create_markovs) { g_return_if_fail (!g_hash_table_lookup (state->exes, exe)); exe->seq = ++(state->exe_seq); if (create_markovs) { g_hash_table_foreach (state->exes, (GHFunc)shift_preload_markov_new, exe); } g_hash_table_insert (state->exes, exe->path, exe); } void preload_state_unregister_exe (preload_exe_t *exe) { g_return_if_fail (g_hash_table_lookup (state->exes, exe)); g_set_foreach (exe->markovs, (GFunc)preload_markov_free, exe); g_set_free (exe->markovs); exe->markovs = NULL; g_hash_table_remove (state->exes, exe); } #define TAG_PRELOAD "PRELOAD" #define TAG_MAP "MAP" #define TAG_BADEXE "BADEXE" #define TAG_EXE "EXE" #define TAG_EXEMAP "EXEMAP" #define TAG_MARKOV "MARKOV" #define READ_TAG_ERROR "invalid tag" #define READ_SYNTAX_ERROR "invalid syntax" #define READ_INDEX_ERROR "invalid index" #define READ_DUPLICATE_INDEX_ERROR "duplicate index" #define READ_DUPLICATE_OBJECT_ERROR "duplicate object" typedef struct _read_context_t { char *line; const char *errmsg; char *path; GHashTable *maps; GHashTable *exes; gpointer data; GError *err; char filebuf[FILELEN]; } read_context_t; static void read_map (read_context_t *rc) { preload_map_t *map; int update_time; int i, expansion; long offset, length; char *path; if (6 > sscanf (rc->line, "%d %d %lu %lu %d %"FILELENSTR"s", &i, &update_time, &offset, &length, &expansion, rc->filebuf)) { rc->errmsg = READ_SYNTAX_ERROR; return; } path = g_filename_from_uri (rc->filebuf, NULL, &(rc->err)); if (!path) return; map = preload_map_new (path, offset, length); g_free (path); if (g_hash_table_lookup (rc->maps, GINT_TO_POINTER (i))) { rc->errmsg = READ_DUPLICATE_INDEX_ERROR; goto err; } if (g_hash_table_lookup (state->maps, map)) { rc->errmsg = READ_DUPLICATE_OBJECT_ERROR; goto err; } map->update_time = update_time; preload_map_ref (map); g_hash_table_insert (rc->maps, GINT_TO_POINTER (i), map); return; err: preload_map_free (map); } static void read_badexe (read_context_t *rc) { int size; int expansion; char *path; /* we do not read-in badexes. let's clean them up on every start, give them * another chance! */ return; if (3 > sscanf (rc->line, "%d %d %"FILELENSTR"s", &size, &expansion, rc->filebuf)) { rc->errmsg = READ_SYNTAX_ERROR; return; } path = g_filename_from_uri (rc->filebuf, NULL, &(rc->err)); if (!path) return; g_hash_table_insert (state->bad_exes, path, GINT_TO_POINTER (size)); } static void read_exe (read_context_t *rc) { preload_exe_t *exe; int update_time, time; int i, expansion; char *path; if (5 > sscanf (rc->line, "%d %d %d %d %"FILELENSTR"s", &i, &update_time, &time, &expansion, rc->filebuf)) { rc->errmsg = READ_SYNTAX_ERROR; return; } path = g_filename_from_uri (rc->filebuf, NULL, &(rc->err)); if (!path) return; exe = preload_exe_new (path, FALSE, NULL); exe->change_timestamp = -1; g_free (path); if (g_hash_table_lookup (rc->exes, GINT_TO_POINTER (i))) { rc->errmsg = READ_DUPLICATE_INDEX_ERROR; goto err; } if (g_hash_table_lookup (state->exes, exe->path)) { rc->errmsg = READ_DUPLICATE_OBJECT_ERROR; goto err; } exe->update_time = update_time; exe->time = time; g_hash_table_insert (rc->exes, GINT_TO_POINTER (i), exe); preload_state_register_exe (exe, FALSE); return; err: preload_exe_free (exe); } static void read_exemap (read_context_t *rc) { int iexe, imap; preload_exe_t *exe; preload_map_t *map; preload_exemap_t *exemap; double prob; if (3 > sscanf (rc->line, "%d %d %lg", &iexe, &imap, &prob)) { rc->errmsg = READ_SYNTAX_ERROR; return; } exe = g_hash_table_lookup (rc->exes, GINT_TO_POINTER (iexe)); map = g_hash_table_lookup (rc->maps, GINT_TO_POINTER (imap)); if (!exe || !map) { rc->errmsg = READ_INDEX_ERROR; return; } exemap = preload_exe_map_new (exe, map); exemap->prob = prob; } static void read_markov (read_context_t *rc) { int time, state, state_new; int ia, ib; preload_exe_t *a, *b; preload_markov_t *markov; int n; n = 0; if (3 > sscanf (rc->line, "%d %d %d%n", &ia, &ib, &time, &n)) { rc->errmsg = READ_SYNTAX_ERROR; return; } rc->line += n; a = g_hash_table_lookup (rc->exes, GINT_TO_POINTER (ia)); b = g_hash_table_lookup (rc->exes, GINT_TO_POINTER (ib)); if (!a || !b) { rc->errmsg = READ_INDEX_ERROR; return; } markov = preload_markov_new (a, b, FALSE); markov->time = time; for (state = 0; state < 4; state++) { double x; if (1 > sscanf (rc->line, "%lg%n", &x, &n)) { rc->errmsg = READ_SYNTAX_ERROR; return; } rc->line += n; markov->time_to_leave[state] = x; } for (state = 0; state < 4; state++) { for (state_new = 0; state_new < 4; state_new++) { int x; if (1 > sscanf (rc->line, "%d%n", &x, &n)) { rc->errmsg = READ_SYNTAX_ERROR; return; } rc->line += n; markov->weight[state][state_new] = x; } } } static void set_running_process_callback (pid_t G_GNUC_UNUSED pid, const char *path, int time) { preload_exe_t *exe; exe = g_hash_table_lookup (state->exes, path); if (exe) { exe->running_timestamp = time; state->running_exes = g_slist_prepend (state->running_exes, exe); } } static void set_markov_state_callback (preload_markov_t *markov) { markov->state = markov_state (markov); } static char * read_state (GIOChannel *f) { int lineno; GString *linebuf; GIOStatus s; char tag[32] = ""; char *errmsg; read_context_t rc; rc.errmsg = NULL; rc.err = NULL; rc.maps = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL, (GDestroyNotify)preload_map_unref); rc.exes = g_hash_table_new (g_direct_hash, g_direct_equal); linebuf = g_string_sized_new (100); lineno = 0; while (!rc.err && !rc.errmsg) { s = g_io_channel_read_line_string (f, linebuf, NULL, &rc.err); if (s == G_IO_STATUS_AGAIN) continue; if (s == G_IO_STATUS_EOF || s == G_IO_STATUS_ERROR) break; lineno++; rc.line = linebuf->str; if (1 > sscanf (rc.line, "%31s", tag)) { rc.errmsg = READ_TAG_ERROR; break; } rc.line += strlen (tag); if (lineno == 1 && strcmp (tag, TAG_PRELOAD)) { g_warning ("State file has invalid header, ignoring it"); break; } if (!strcmp (tag, TAG_PRELOAD)) { int major_ver_read, major_ver_run; const char *version; int time; if (lineno != 1 || 2 > sscanf (rc.line, "%d.%*[^\t]\t%d", &major_ver_read, &time)) { rc.errmsg = READ_SYNTAX_ERROR; break; } version = VERSION; major_ver_run = strtod (version, NULL); if (major_ver_run < major_ver_read ) { g_warning ("State file is of a newer version, ignoring it"); break; } else if (major_ver_run > major_ver_read) { g_warning ("State file is of an old version that I cannot understand anymore, ignoring it"); break; } state->last_accounting_timestamp = state->time = time; } else if (!strcmp (tag, TAG_MAP)) read_map (&rc); else if (!strcmp (tag, TAG_BADEXE)) read_badexe (&rc); else if (!strcmp (tag, TAG_EXE)) read_exe (&rc); else if (!strcmp (tag, TAG_EXEMAP)) read_exemap (&rc); else if (!strcmp (tag, TAG_MARKOV)) read_markov (&rc); else if (linebuf->str[0] && linebuf->str[0] != '#') { rc.errmsg = READ_TAG_ERROR; break; } } g_string_free (linebuf, TRUE); g_hash_table_destroy (rc.exes); g_hash_table_destroy (rc.maps); if (rc.err) rc.errmsg = rc.err->message; if (rc.errmsg) errmsg = g_strdup_printf ("line %d: %s", lineno, rc.errmsg); else errmsg = NULL; if (rc.err) g_error_free (rc.err); if (!errmsg) { proc_foreach ((GHFunc)set_running_process_callback, GINT_TO_POINTER (state->time)); state->last_running_timestamp = state->time; preload_markov_foreach ((GFunc)set_markov_state_callback, NULL); } return errmsg; } void preload_state_load (const char *statefile) { memset (state, 0, sizeof (*state)); state->exes = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, (GDestroyNotify)preload_exe_free); state->bad_exes = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL); state->maps = g_hash_table_new ((GHashFunc)preload_map_hash, (GEqualFunc)preload_map_equal); state->maps_arr = g_ptr_array_new (); if (statefile && *statefile) { GIOChannel *f; GError *err = NULL; g_message ("loading state from %s", statefile); f = g_io_channel_new_file (statefile, "r", &err); if (!f) { if (err->code == G_FILE_ERROR_ACCES) g_error ("cannot open %s for reading: %s", statefile, err->message); else { g_warning ("cannot open %s for reading, ignoring: %s", statefile, err->message); g_error_free (err); } } else { char *errmsg; errmsg = read_state (f); g_io_channel_unref (f); if (errmsg) { g_error ("failed reading state from %s: %s", statefile, errmsg); g_free (errmsg); } } g_debug ("loading state done"); } proc_get_memstat (&(state->memstat)); state->memstat_timestamp = state->time; } #define write_it(s) \ if (wc->err || G_IO_STATUS_NORMAL != g_io_channel_write_chars (wc->f, s, -1, NULL, &(wc->err))) \ return; #define write_tag(tag) write_it (tag "\t") #define write_string(string) write_it ((string)->str) #define write_ln() write_it ("\n") typedef struct _write_context_t { GIOChannel *f; GString *line; GError *err; } write_context_t; static void write_header (write_context_t *wc) { write_tag (TAG_PRELOAD); g_string_printf (wc->line, "%s\t%d", VERSION, state->time); write_string (wc->line); write_ln (); } static void write_map (preload_map_t *map, gpointer G_GNUC_UNUSED data, write_context_t *wc) { char *uri; uri = g_filename_to_uri (map->path, NULL, &(wc->err)); if (!uri) return; write_tag (TAG_MAP); g_string_printf (wc->line, "%d\t%d\t%lu\t%lu\t%d\t%s", map->seq, map->update_time, (long)map->offset, (long)map->length, -1/*expansion*/, uri); write_string (wc->line); write_ln (); g_free (uri); } static void write_badexe (char *path, int update_time, write_context_t *wc) { char *uri; uri = g_filename_to_uri (path, NULL, &(wc->err)); if (!uri) return; write_tag (TAG_BADEXE); g_string_printf (wc->line, "%d\t%d\t%s", update_time, -1/*expansion*/, uri); write_string (wc->line); write_ln (); g_free (uri); } static void write_exe (gpointer G_GNUC_UNUSED key, preload_exe_t *exe, write_context_t *wc) { char *uri; uri = g_filename_to_uri (exe->path, NULL, &(wc->err)); if (!uri) return; write_tag (TAG_EXE); g_string_printf (wc->line, "%d\t%d\t%d\t%d\t%s", exe->seq, exe->update_time, exe->time, -1/*expansion*/, uri); write_string (wc->line); write_ln (); g_free (uri); } static void write_exemap (preload_exemap_t *exemap, preload_exe_t *exe, write_context_t *wc) { write_tag (TAG_EXEMAP); g_string_printf (wc->line, "%d\t%d\t%lg", exe->seq, exemap->map->seq, exemap->prob); write_string (wc->line); write_ln (); } static void write_markov (preload_markov_t *markov, write_context_t *wc) { int state, state_new; write_tag (TAG_MARKOV); g_string_printf (wc->line, "%d\t%d\t%d", markov->a->seq, markov->b->seq, markov->time); write_string (wc->line); for (state = 0; state < 4; state++) { g_string_printf (wc->line, "\t%lg", markov->time_to_leave[state]); write_string (wc->line); } for (state = 0; state < 4; state++) { for (state_new = 0; state_new < 4; state_new++) { g_string_printf (wc->line, "\t%d", markov->weight[state][state_new]); write_string (wc->line); } } write_ln (); } static char * write_state (GIOChannel *f) { write_context_t wc; wc.f = f; wc.line = g_string_sized_new (100); wc.err = NULL; write_header (&wc); if (!wc.err) g_hash_table_foreach (state->maps, (GHFunc)write_map, &wc); if (!wc.err) g_hash_table_foreach (state->bad_exes, (GHFunc)write_badexe, &wc); if (!wc.err) g_hash_table_foreach (state->exes, (GHFunc)write_exe, &wc); if (!wc.err) preload_exemap_foreach ((GHFunc)write_exemap, &wc); if (!wc.err) preload_markov_foreach ((GFunc)write_markov, &wc); g_string_free (wc.line, TRUE); if (wc.err) { char *tmp; tmp = g_strdup (wc.err->message); g_error_free (wc.err); return tmp; } else return NULL; } static gboolean true_func (void) { return TRUE; } void preload_state_save (const char *statefile) { if (state->dirty && statefile && *statefile) { int fd; GIOChannel *f; char *tmpfile; g_message ("saving state to %s", statefile); tmpfile = g_strconcat (statefile, ".tmp", NULL); g_debug ("to be honest, saving state to %s", tmpfile); fd = open (tmpfile, O_WRONLY | O_CREAT, 0660); if (0 > fd) { g_critical ("cannot open %s for writing, ignoring: %s", tmpfile, strerror (errno)); } else { char *errmsg; f = g_io_channel_unix_new (fd); errmsg = write_state (f); g_io_channel_unref (f); if (errmsg) { g_critical ("failed writing state to %s, ignoring: %s", tmpfile, errmsg); g_free (errmsg); g_unlink (tmpfile); } else { if (0 > g_rename (tmpfile, statefile)) { g_critical ("failed to rename %s to %s", tmpfile, statefile); } else { g_debug ("successfully renamed %s to %s", tmpfile, statefile); } } } close (fd); g_free (tmpfile); state->dirty = FALSE; g_debug ("saving state done"); } /* clean up bad exes once in a while */ g_hash_table_foreach_remove (state->bad_exes, (GHRFunc)true_func, NULL); } void preload_state_free (void) { g_message ("freeing state memory begin"); g_hash_table_destroy (state->bad_exes); state->bad_exes = NULL; g_hash_table_destroy (state->exes); state->exes = NULL; g_assert (g_hash_table_size (state->maps) == 0); g_assert (state->maps_arr->len == 0); g_hash_table_destroy (state->maps); state->maps = NULL; g_slist_free (state->running_exes); state->running_exes = NULL; g_ptr_array_free (state->maps_arr, TRUE); g_debug ("freeing state memory done"); } void preload_state_dump_log (void) { g_message ("state log dump requested"); fprintf (stderr, "persistent state stats:\n"); fprintf (stderr, "preload time = %d\n", state->time); fprintf (stderr, "num exes = %d\n", g_hash_table_size (state->exes)); fprintf (stderr, "num bad exes = %d\n", g_hash_table_size (state->bad_exes)); fprintf (stderr, "num maps = %d\n", g_hash_table_size (state->maps)); fprintf (stderr, "runtime state stats:\n"); fprintf (stderr, "num running exes = %d\n", g_slist_length (state->running_exes)); g_debug ("state log dump done"); } /* we divide cycle into two cycle/2 intervals and call tick and tick2 at * those. this is because we like some time to pass before making some * decision, so we gather data and make predictions in tick, and use that * data to update the model in tick2. */ static gboolean preload_state_tick (gpointer data); static gboolean preload_state_tick2 (gpointer data) { if (state->model_dirty) { g_debug ("state updating begin"); preload_spy_update_model (data); state->model_dirty = FALSE; g_debug ("state updating end"); } /* increase time and reschedule */ state->time += (conf->model.cycle + 1) / 2; g_timeout_add_seconds ((conf->model.cycle + 1) / 2, preload_state_tick, data); return FALSE; } static gboolean preload_state_tick (gpointer data) { if (conf->system.doscan) { g_debug ("state scanning begin"); preload_spy_scan (data); if (preload_is_debugging()) preload_state_dump_log (); state->dirty = state->model_dirty = TRUE; g_debug ("state scanning end"); } if (conf->system.dopredict) { g_debug ("state predicting begin"); preload_prophet_predict (data); g_debug ("state predicting end"); } /* increase time and reschedule */ state->time += conf->model.cycle / 2; g_timeout_add_seconds (conf->model.cycle / 2, preload_state_tick2, data); return FALSE; } static const char *autosave_statefile; static gboolean preload_state_autosave (void) { preload_state_save (autosave_statefile); g_timeout_add_seconds (conf->system.autosave, (GSourceFunc)preload_state_autosave, NULL); return FALSE; } void preload_state_run (const char *statefile) { g_timeout_add (0, preload_state_tick, NULL); if (statefile) { autosave_statefile = statefile; g_timeout_add_seconds (conf->system.autosave, (GSourceFunc)preload_state_autosave, NULL); } } preload-0.6.4/src/conf.h0000664000076400007640000000201311077747205011775 00000000000000#ifndef CONF_H #define CONF_H /* units */ #define bytes 1 #define kilobytes 1024 #define seconds 1 #define minutes 60 #define hours 3600 #define signed_integer_percent 1 #define processes 1 typedef struct _preload_conf_t { /* conf values. see preload.conf for a description of these */ /* all time and size values here are in seconds and bytes, * unlike in the config file */ struct _conf_model { int cycle; gboolean usecorrelation; int minsize; /* memory usage adjustment */ int memtotal; int memfree; int memcached; } model; struct _conf_system { gboolean doscan; gboolean dopredict; int autosave; char **mapprefix; char **exeprefix; int maxprocs; enum { SORT_NONE = 0, SORT_PATH = 1, SORT_INODE = 2, SORT_BLOCK = 3 } sortstrategy; } system; } preload_conf_t; extern preload_conf_t conf[1]; void preload_conf_load (const char *conffile, gboolean fail); void preload_conf_dump_log (void); #endif preload-0.6.4/src/readahead.c0000664000076400007640000001235011077747205012746 00000000000000/* readahead.c - read in advance a list of files, adding them to the page cache * * Copyright (C) 2005,2008 Behdad Esfahbod * * This file is part of preload. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301 USA */ #include "common.h" #include "readahead.h" #include "log.h" #include "conf.h" #include #include #ifdef HAVE_LINUX_FS_H #include #endif static void set_block(preload_map_t *file, gboolean use_inode) { int fd = -1; int block = 0; struct stat buf; /* in case we can get block, set to 0 to not retry */ file->block = 0; fd = open(file->path, O_RDONLY); if (fd < 0) return; if (0 > fstat (fd, &buf)) return; #ifdef FIBMAP if (!use_inode) { block = file->offset / buf.st_blksize; if (0 > ioctl (fd, FIBMAP, &block)) block = 0; } #endif /* fall back to inode number */ block = buf.st_ino; file->block = block; close (fd); } /* Compare files by path */ static int map_path_compare (const preload_map_t **pa, const preload_map_t **pb) { const preload_map_t *a = *pa, *b = *pb; int i; i = strcmp(a->path, b->path); if (!i) /* same file */ i = a->offset - b->offset; if (!i) /* same offset?! */ i = b->length - a->length; return i; } /* Compare files by block */ static int map_block_compare (const preload_map_t **pa, const preload_map_t **pb) { const preload_map_t *a = *pa, *b = *pb; int i; i = a->block - b->block; if (!i) /* no block? */ i = strcmp(a->path, b->path); if (!i) /* same file */ i = a->offset - b->offset; if (!i) /* same offset?! */ i = b->length - a->length; return i; } static int procs = 0; static void wait_for_children (void) { /* wait for child processes to terminate */ while (procs > 0) { int status; if (wait (&status) > 0) procs--; } } static void process_file(const char *path, size_t offset, size_t length) { int fd = -1; int maxprocs = conf->system.maxprocs; if (procs >= maxprocs) wait_for_children (); if (maxprocs > 0) { /* parallel reading */ int status = fork(); if (status == -1) { /* ignore error, return */ return; } /* return immediately in the parent */ if (status > 0) { procs++; return; } } fd = open(path, O_RDONLY | O_NOCTTY #ifdef O_NOATIME | O_NOATIME #endif ); if (fd >= 0) { readahead(fd, offset, length); close (fd); } if (maxprocs > 0) { /* we're in a child process, exit */ exit (0); } } static void sort_by_block_or_inode (preload_map_t **files, int file_count) { int i; gboolean need_block = FALSE; /* first see if any file doesn't have block/inode info */ for (i=0; iblock == -1) { need_block = TRUE; break; } if (need_block) { /* Sorting by path, to make stat fast. */ qsort(files, file_count, sizeof(*files), (GCompareFunc)map_path_compare); for (i=0; iblock == -1) set_block (files[i], conf->system.sortstrategy == SORT_INODE); } /* Sorting by block. */ qsort(files, file_count, sizeof(*files), (GCompareFunc)map_block_compare); } static void sort_files (preload_map_t **files, int file_count) { switch (conf->system.sortstrategy) { case SORT_NONE: break; case SORT_PATH: qsort(files, file_count, sizeof(*files), (GCompareFunc)map_path_compare); break; case SORT_INODE: case SORT_BLOCK: sort_by_block_or_inode (files, file_count); break; default: g_warning ("Invalid value for config key system.sortstrategy: %d", conf->system.sortstrategy); /* avoid warning every time */ conf->system.sortstrategy = SORT_BLOCK; break; } } int preload_readahead (preload_map_t **files, int file_count) { int i; const char *path = NULL; size_t offset = 0, length = 0; int processed = 0; sort_files (files, file_count); for (i=0; ioffset && offset + length >= files[i]->offset && 0 == strcmp (path, files[i]->path)) { /* merge requests */ length = files[i]->offset + files[i]->length - offset; continue; } if (path) { process_file(path, offset, length); processed++; path = NULL; } path = files[i]->path; offset = files[i]->offset; length = files[i]->length; } if (path) { process_file(path, offset, length); processed++; path = NULL; } wait_for_children (); return processed; } preload-0.6.4/src/cmdline.c0000664000076400007640000001105411077747205012463 00000000000000/* cmdline.c - preload command-line options handling routines * * Copyright (C) 2005,2006,2007 Behdad Esfahbod * * This file is part of preload. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301 USA */ #include "common.h" #include "cmdline.h" #include "preload.h" #include #define DEFAULT_LOGLEVEL_STRING STRINGIZE(DEFAULT_LOGLEVEL) #define DEFAULT_NICELEVEL_STRING STRINGIZE(DEFAULT_NICELEVEL) /* TODO: GOption? */ static const struct option const opts[] = { {"help", 0, 0, 'h'}, {"version", 0, 0, 'v'}, {"conffile", 1, 0, 'c'}, {"statefile", 1, 0, 's'}, {"logfile", 1, 0, 'l'}, {"foreground", 0, 0, 'f'}, {"nice", 1, 0, 'n'}, {"verbose", 1, 0, 'V'}, {"debug", 0, 0, 'd'}, {NULL, 0, 0, 0}, }; static const char *help2man_str = "Display command line parameters and their default values, and exit."; /* help2man */ static const char const *opts_help[] = { "Display this information and exit.", /* help */ "Display version information and exit.", /* version */ "Set configuration file. Empty string means no conf file.", /* conffile */ "Set state file to load/save. Empty string means no state.", /* statefile */ "Set log file. Empty string means to log to stderr.", /* logfile */ "Run in foreground, do not daemonize.", /* foreground */ "Nice level.", /* nice */ "Set the verbosity level. Levels 0 to 10 are recognized.", /* verbose */ "Debug mode: --logfile '' --foreground --verbose 9", /* debug */ }; static const char const *opts_default[] = { NULL, /* help */ NULL, /* version */ DEFAULT_CONFFILE, /* conffile */ DEFAULT_STATEFILE, /* statefile */ DEFAULT_LOGFILE, /* logfile */ NULL, /* foreground */ DEFAULT_NICELEVEL_STRING, /* nice */ DEFAULT_LOGLEVEL_STRING, /* verbose */ NULL, /* debug */ }; static void version_func (void) G_GNUC_NORETURN; static void help_func (gboolean err, gboolean help2man) G_GNUC_NORETURN; void preload_cmdline_parse (int *argc, char ***argv) { for (;;) { int i; i = getopt_long (*argc, *argv, "hHvc:s:l:fn:V:d", opts, NULL); if (i == -1) { break; } switch (i) { case 'c': conffile = optarg; break; case 's': statefile = optarg; break; case 'l': logfile = optarg; break; case 'f': foreground = 1; break; case 'n': nicelevel = strtol (optarg, NULL, 10); break; case 'V': preload_log_level = strtol (optarg, NULL, 10); break; case 'd': logfile = NULL; foreground = 1; preload_log_level = 9; break; case 'v': version_func (); case 'H': case 'h': default: help_func (i != 'h' && i != 'H', i == 'H'); } } *argc -= optind; *argv += optind; } static void version_func (void) { printf ("%s\n\nCopyright (C) 2005,2006,2007,2008 Behdad Esfahbod.\n" "This is free software; see the source for copying conditions. There is NO\n" "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" "\n" "Written by Behdad Esfahbod \n", PACKAGE_STRING); exit (EXIT_SUCCESS); } static void help_func (gboolean err, gboolean help2man) { FILE *f = err ? stderr : stdout; const struct option *opt; const char **hlp, **dft; int max = 0; fprintf (f, "Usage: %s [OPTION]...\n" "%s is an adaptive readahead daemon that prefetches files mapped by\n" "applications from the disk to reduce application startup time.\n\n", PACKAGE, PACKAGE_NAME); for (opt = opts; opt->name; opt++) { int size = strlen (opt->name); if (size > max) max = size; } for (opt = opts, hlp = opts_help, dft = opts_default; opt->name; opt++, hlp++, dft++) { fprintf (f, " -%c, --%-*s %s\n", opt->val, max, opt->name, opt->val == 'h' && help2man ? help2man_str : *hlp); if (*dft) fprintf (f, " %*s(default is %s)\n", max, "", *dft); } fprintf (f, "\nReport bugs to <%s>\n", PACKAGE_BUGREPORT); exit (err ? EXIT_FAILURE : EXIT_SUCCESS); } preload-0.6.4/src/readahead.h0000664000076400007640000000020411077747205012746 00000000000000#ifndef READAHEAD_H #define READAHEAD_H #include int preload_readahead (preload_map_t **files, int file_count); #endif preload-0.6.4/src/preload.80000664000076400007640000000364511171453175012425 00000000000000.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.36. .TH PRELOAD "8" "April 2009" "preload 0.6.4" "System Administration Utilities" .SH NAME preload \- Adaptive readahead daemon .SH SYNOPSIS .B preload [\fIOPTION\fR]... .SH DESCRIPTION preload is an adaptive readahead daemon that prefetches files mapped by applications from the disk to reduce application startup time. .TP \fB\-h\fR, \fB\-\-help\fR Display command line parameters and their default values, and exit. .TP \fB\-v\fR, \fB\-\-version\fR Display version information and exit. .TP \fB\-c\fR, \fB\-\-conffile\fR Set configuration file. Empty string means no conf file. (default is /home/behdad/.local/etc/preload.conf) .TP \fB\-s\fR, \fB\-\-statefile\fR Set state file to load/save. Empty string means no state. (default is /home/behdad/.local/var/lib/preload/preload.state) .TP \fB\-l\fR, \fB\-\-logfile\fR Set log file. Empty string means to log to stderr. (default is /home/behdad/.local/var/log/preload.log) .TP \fB\-f\fR, \fB\-\-foreground\fR Run in foreground, do not daemonize. .TP \fB\-n\fR, \fB\-\-nice\fR Nice level. (default is 15) .TP \fB\-V\fR, \fB\-\-verbose\fR Set the verbosity level. Levels 0 to 10 are recognized. (default is 4) .TP \fB\-d\fR, \fB\-\-debug\fR Debug mode: \fB\-\-logfile\fR '' \fB\-\-foreground\fR \fB\-\-verbose\fR 9 .SH SIGNALS On receipt of a SIGHUP, the daemon will close and reopen its log file, and reread the configuratoin file. On receipt of a SIGUSR1, the daemon dumps the currently loaded configuration into the log file. On receipt of a SIGUSR2, the daemon saves its state into the state file. .SH AUTHOR Written by Behdad Esfahbod .SH "REPORTING BUGS" Report bugs to .SH COPYRIGHT Copyright \(co 2005,2006,2007,2008 Behdad Esfahbod. .br This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. preload-0.6.4/src/spy.h0000664000076400007640000000017311077747205011670 00000000000000#ifndef SPY_H #define SPY_H void preload_spy_scan (gpointer data); void preload_spy_update_model (gpointer data); #endif preload-0.6.4/src/conf.c0000664000076400007640000001002011077747205011765 00000000000000/* conf.c - preload configuration handling routines * * Copyright (C) 2005 Behdad Esfahbod * * This file is part of preload. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301 USA */ #include "common.h" #include "log.h" #include "conf.h" #include "state.h" #include #include preload_conf_t conf[1]; static void set_default_conf (preload_conf_t *conf) { #define true TRUE #define false FALSE #define default_integer(def, unit) (unit * def) #define default_boolean(def, unit) def #define default_enum(def, unit) def #define default_string_list(def, unit) NULL #define confkey(grp, type, key, def, unit) \ conf->grp.key = default_##type (def, unit); #include "confkeys.h" #undef confkey } void preload_conf_load (const char *conffile, gboolean fail) { GKeyFile *f; GError *e = NULL; preload_conf_t newconf; GLogLevelFlags flags = fail ? G_LOG_LEVEL_ERROR : G_LOG_LEVEL_CRITICAL; set_default_conf (&newconf); if (conffile && *conffile) { preload_conf_t dummyconf; g_message ("loading conf from %s", conffile); f = g_key_file_new (); if (!g_key_file_load_from_file (f, conffile, G_KEY_FILE_NONE, &e)) { g_log (G_LOG_DOMAIN, flags, "failed loading conf from %s: %s", conffile, e->message); return; } #define get_integer(grp, key, unit) (unit * g_key_file_get_integer (f, grp, key, &e)) #define get_enum(grp, key, unit) (g_key_file_get_integer (f, grp, key, &e)) #define get_boolean(grp, key, unit) g_key_file_get_boolean (f, grp, key, &e) #define get_string_list(grp, key, unit) g_key_file_get_string_list (f, grp, key, NULL, &e) #define confkey(grp, type, key, def, unit) \ dummyconf.grp.key = get_##type (STRINGIZE(grp), STRINGIZE(key), unit); \ if (!e) \ newconf.grp.key = dummyconf.grp.key; \ else if (e->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND) { \ g_log (G_LOG_DOMAIN, flags, "failed loading conf key %s.%s: %s", \ STRINGIZE(grp), STRINGIZE(key), e->message); \ g_error_free (e); \ return; \ } else { \ g_error_free (e); \ e = NULL; \ } #include "confkeys.h" #undef confkey g_key_file_free (f); g_debug ("loading conf done"); } /* free the old configuration */ g_strfreev (conf->system.mapprefix); g_strfreev (conf->system.exeprefix); *conf = newconf; } void preload_conf_dump_log (void) { const char *curgrp = ""; time_t curtime; char *timestr; g_message ("conf log dump requested"); curtime = time (NULL); timestr = ctime (&curtime); fprintf (stderr, "#\n"); fprintf (stderr, "# loaded configuration at %s", timestr); #define print_integer(v, unit) \ fprintf (stderr, "%d", v / unit); #define print_enum(v, unit) \ fprintf (stderr, "%d", v); #define print_boolean(v, unit) \ fprintf (stderr, "%s", v ? "true" : "false"); #define print_string(v, unit) \ fprintf (stderr, "%s", v); #define print_string_list(v, unit) G_STMT_START {\ char **p = v; \ if (p) \ fprintf (stderr, "%s", *p++); \ while (p && *p) \ fprintf (stderr, ";%s", *p++); \ } G_STMT_END #define confkey(grp, type, key, def, unit) \ if (strcmp (STRINGIZE(grp), curgrp)) \ fprintf (stderr, "[%s]\n", curgrp = STRINGIZE(grp)); \ fprintf (stderr, "%s = ", STRINGIZE(key)); \ print_##type (conf->grp.key, unit); \ fprintf (stderr, "\n"); #include "confkeys.h" #undef confkey fprintf (stderr, "# loaded configuration - end\n"); fprintf (stderr, "#\n"); g_debug ("conf log dump done"); } preload-0.6.4/src/runtests.sh0000775000076400007640000000047011077747205013132 00000000000000#!/bin/sh set -e > preload.state echo Testing preload with preconf.conf.debug config file ( sleep 1; killall ./preload 2>/dev/null ) & ./preload -c preload.conf -s '' -d echo Testing preload with preconf.conf config file ( sleep 1; killall ./preload 2>/dev/null ) & ./preload -c preload.conf -s '' -l '' -f preload-0.6.4/src/preload.c0000664000076400007640000000673311116707013012471 00000000000000/* preload.c - preload daemon body * * Copyright (C) 2005 Behdad Esfahbod * Portions Copyright (C) 2000 Andrew Henroid * Portions Copyright (C) 2001 Sun Microsystems (thockin@sun.com) * * This file is part of preload. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301 USA */ #include "common.h" #include "preload.h" #include "log.h" #include "cmdline.h" #include "conf.h" #include "state.h" #include #include /* variables */ const char *conffile = DEFAULT_CONFFILE; const char *statefile = DEFAULT_STATEFILE; const char *logfile = DEFAULT_LOGFILE; int nicelevel = DEFAULT_NICELEVEL; int foreground = 0; /* local variables */ static GMainLoop *main_loop; /* Functions */ static void daemonize (void) { switch (fork ()) { case -1: g_error ("fork failed, exiting: %s", strerror (errno)); exit (EXIT_FAILURE); break; case 0: /* child */ break; default: /* parent */ if (getpid () == 1) { /* chain to /sbin/init if we are called as init! */ execl ("/sbin/init", "init", NULL); execl ("/bin/init", "init", NULL); } exit (EXIT_SUCCESS); } /* disconnect */ setsid (); umask (0007); /* get outta the way */ (void) chdir ("/"); } /* signal handling */ static gboolean sig_handler_sync (gpointer data) { switch (GPOINTER_TO_INT (data)) { case SIGHUP: preload_conf_load (conffile, FALSE); preload_log_reopen (logfile); break; case SIGUSR1: preload_state_dump_log (); preload_conf_dump_log (); break; case SIGUSR2: preload_state_save (statefile); break; default: /* everything else is an exit request */ g_message ("exit requested"); g_main_loop_quit (main_loop); break; } return FALSE; } static RETSIGTYPE sig_handler (int sig) { g_timeout_add (0, sig_handler_sync, GINT_TO_POINTER (sig)); } static void set_sig_handlers (void) { /* trap key signals */ signal (SIGINT, sig_handler); signal (SIGQUIT, sig_handler); signal (SIGTERM, sig_handler); signal (SIGHUP, sig_handler); signal (SIGUSR1, sig_handler); signal (SIGUSR2, sig_handler); signal (SIGPIPE, SIG_IGN); } int main (int argc, char **argv) { /* initialize */ preload_cmdline_parse (&argc, &argv); preload_log_init (logfile); preload_conf_load (conffile, TRUE); set_sig_handlers (); if (!foreground) daemonize (); if (0 > nice (nicelevel)) g_warning ("%s", strerror (errno)); g_debug ("starting up"); preload_state_load (statefile); /* main loop */ main_loop = g_main_loop_new (NULL, FALSE); preload_state_run (statefile); g_main_loop_run (main_loop); /* clean up */ preload_state_save (statefile); if (preload_is_debugging ()) preload_state_free (); g_debug ("exiting"); return EXIT_SUCCESS; } preload-0.6.4/src/cmdline.h0000664000076400007640000000014311077747205012465 00000000000000#ifndef CMDLINE_H #define CMDLINE_H void preload_cmdline_parse (int *argc, char ***argv); #endif preload-0.6.4/src/proc.h0000664000076400007640000000153311077747205012021 00000000000000#ifndef PROC_H #define PROC_H /* preload_memory_t: structure holding information * about memory conditions of the system. */ typedef struct _preload_memory_t { /* runtime: */ /* all the following are in kilobytes (1024) */ int total; /* total memory */ int free; /* free memory */ int buffers; /* buffers memory */ int cached; /* page-cache memory */ int pagein; /* total data paged (read) in since boot */ int pageout; /* total data paged (written) out since boot */ } preload_memory_t; /* read system memory information */ void proc_get_memstat (preload_memory_t *mem); /* returns sum of length of maps, in bytes, or 0 if failed */ size_t proc_get_maps (pid_t pid, GHashTable *maps, GSet **exemaps); /* foreach process running, passes pid as key and exe path as value */ void proc_foreach (GHFunc func, gpointer user_data); #endif preload-0.6.4/src/prophet.c0000664000076400007640000001566211077747205012542 00000000000000/* prophet.c - preload inference and prediction routines * * Copyright (C) 2005 Behdad Esfahbod * * This file is part of preload. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301 USA */ #include "common.h" #include "prophet.h" #include "log.h" #include "conf.h" #include "state.h" #include "readahead.h" #include /* Computes the P(Y runs in next period | current state) * and bids in for the Y. Y should not be running. * * Y=1 if it's needed in next period, 0 otherwise. * Probability inference follows: * * P(Y=1) = 1 - P(Y=0) * P(Y=0) = Π P(Y=0|Xi) * P(Y=0|Xi) = 1 - P(Y=1|Xi) * P(Y=1|Xi) = P(state change of Y,X) * P(next state has Y=1) * corr(Y,X) * corr(Y=X) = regularized |correlation(Y,X)| * * So: * * lnprob(Y) = log(P(Y=0)) = Σ log(P(Y=0|Xi)) = Σ log(1 - P(Y=1|Xi)) * */ static void markov_bid_for_exe (preload_markov_t *markov, preload_exe_t *y, int ystate, double correlation) { int state; double p_state_change; double p_y_runs_next; double p_runs; state = markov->state; if (!markov->weight[state][state] || !(markov->time_to_leave[state] > 1)) return; /* p_state_change is the probability of the state of markov changing * in the next period. period is taken as 1.5 cycles. it's computed * as: * -λ.period * p(state changes in time < period) = 1 - e * * where λ is one over average time to leave the state. */ p_state_change = -conf->model.cycle * 1.5 / markov->time_to_leave[state]; p_state_change = 1 - exp (p_state_change); /* p_y_runs_next is the probability that X runs, given that a state * change occurs. it's computed linearly based on the number of times * transition has occured from this state to other states. */ /* regularize a bit by adding something to denominator */ p_y_runs_next = markov->weight[state][ystate] + markov->weight[state][3]; p_y_runs_next /= markov->weight[state][state] + 0.01; /* FIXME: what should we do we correlation w.r.t. state? */ correlation = fabs (correlation); p_runs = correlation * p_state_change * p_y_runs_next; y->lnprob += log (1 - p_runs); } static void markov_bid_in_exes (preload_markov_t *markov) { double correlation; if (!markov->weight[markov->state][markov->state]) return; correlation = conf->model.usecorrelation ? preload_markov_correlation (markov) : 1.0; if ((markov->state & 1) == 0) /* a not running */ markov_bid_for_exe (markov, markov->a, 1, correlation); if ((markov->state & 2) == 0) /* b not running */ markov_bid_for_exe (markov, markov->b, 2, correlation); } static void map_zero_prob (preload_map_t *map) { map->lnprob = 0; } static int map_prob_compare (const preload_map_t **pa, const preload_map_t **pb) { const preload_map_t *a = *pa, *b = *pb; return a->lnprob < b->lnprob ? -1 : a->lnprob > b->lnprob ? 1 : 0; } static void exe_zero_prob (gpointer G_GNUC_UNUSED key, preload_exe_t *exe) { exe->lnprob = 0; } /* Computes the P(M needed in next period | current state) * and bids in for the M, where M is the map used by exemap. * * M=1 if it's needed in next period, 0 otherwise. * Probability inference follows: * * P(M=1) = 1 - P(M=0) * P(M=0) = Π P(M=0|Xi) * P(M=0|Xi) = P(Xi=0) * * So: * * lnprob(M) = log(P(M=0)) = Σ log(P(M=0|Xi)) = Σ log(P(Xi=0)) = Σ lnprob(Xi) * */ static void exemap_bid_in_maps (preload_exemap_t *exemap, preload_exe_t *exe) { if (exe_is_running (exe)) { /* if exe is running, we vote against the map, * since it's most prolly in the memory already. */ /* FIXME: use exemap->prob, needs some theory work. */ exemap->map->lnprob += 1; } else { exemap->map->lnprob += exe->lnprob; } } static void exe_prob_print (gpointer G_GNUC_UNUSED key, preload_exe_t *exe) G_GNUC_UNUSED; static void exe_prob_print (gpointer G_GNUC_UNUSED key, preload_exe_t *exe) { if (!exe_is_running (exe)) fprintf (stderr, "ln(prob(~EXE)) = \t%13.10lf\t%s\n", exe->lnprob, exe->path); } static void map_prob_print (preload_map_t *map) G_GNUC_UNUSED; static void map_prob_print (preload_map_t *map) { fprintf (stderr, "ln(prob(~MAP)) = \t%13.10lf\t%s\n", map->lnprob, map->path); } #define clamp_percent(v) ((v)>100 ? 100 : (v) < -100 ? -100 : (v)) #define max(a,b) ((a)>(b) ? (a) : (b)) #define kb(v) ((int)(((v) + 1023) / 1024)) /* input is the list of maps sorted on the need. * decide a cutoff based on memory conditions and readhead. */ void preload_prophet_readahead (GPtrArray *maps_arr) { int i; int memavail, memavailtotal; /* in kilobytes */ preload_memory_t memstat; preload_map_t *map; proc_get_memstat (&memstat); /* memory we are allowed to use for prefetching */ memavail = clamp_percent(conf->model.memtotal) * (memstat.total / 100) + clamp_percent(conf->model.memfree) * (memstat.free / 100); memavail = max (0, memavail); memavail += clamp_percent(conf->model.memcached) * (memstat.cached / 100); memavailtotal = memavail; memcpy (&(state->memstat), &memstat, sizeof (memstat)); state->memstat_timestamp = state->time; i = 0; while (i < (int)(maps_arr->len) && (map = g_ptr_array_index (maps_arr, i)) && map->lnprob < 0 && kb (map->length) <= memavail) { i++; memavail -= kb (map->length); if (preload_log_level >= 10) map_prob_print (map); } g_debug ("%dkb available for preloading, using %dkb of it", memavailtotal, memavailtotal - memavail); if (i) { i = preload_readahead ((preload_map_t **)maps_arr->pdata, i); g_debug ("readahead %d files", i); } else { g_debug ("nothing to readahead"); } } void preload_prophet_predict (gpointer data) { /* reset probabilities that we are gonna compute */ g_hash_table_foreach (state->exes, (GHFunc)exe_zero_prob, data); g_ptr_array_foreach (state->maps_arr, (GFunc)map_zero_prob, data); /* markovs bid in exes */ preload_markov_foreach ((GFunc)markov_bid_in_exes, data); if (preload_log_level >= 9) g_hash_table_foreach (state->exes, (GHFunc)exe_prob_print, data); /* exes bid in maps */ preload_exemap_foreach ((GHFunc)exemap_bid_in_maps, data); /* sort maps on probability */ g_ptr_array_sort (state->maps_arr, (GCompareFunc)map_prob_compare); /* read them in */ preload_prophet_readahead (state->maps_arr); } preload-0.6.4/src/preload.conf.in0000664000076400007640000001271411077747205013612 00000000000000[model] # cycle: # # This is the quantum of time for preload. Preload performs # data gathering and predictions every cycle. Use an even # number. # # Note: Setting this parameter too low may reduce system performance # and stability. # # unit: unit_cycle # default: default_cycle # cycle = default_cycle # usecorrelation: # # Whether correlation coefficient should be used in the prediction # algorithm. There are arguments both for and against using it. # Currently it's believed that using it results in more accurate # prediction. The option may be removed in the future. # # default: default_usecorrelation usecorrelation = default_usecorrelation # minsize: # # Minimum sum of the length of maps of the process for # preload to consider tracking the application. # # Note: Setting this parameter too high will make preload less # effective, while setting it too low will make it eat # quadratically more resources, as it tracks more processes. # # unit: unit_minsize # default: default_minsize # minsize = default_minsize # # The following control how much memory preload is allowed to use # for preloading in each cycle. All values are percentages and are # clamped to -100 to 100. # # The total memory preload uses for prefetching is then computed using # the following formulae: # # max (0, TOTAL * memtotal + FREE * memfree) + CACHED * memcached # where TOTAL, FREE, and CACHED are the respective values read at # runtime from /proc/meminfo. # # memtotal: precentage of total memory # # unit: unit_memtotal # default: default_memtotal # memtotal = default_memtotal # memfree: precentage of free memory # # unit: unit_memfree # default: default_memfree # memfree = default_memfree # memcached: precentage of cached memory # # unit: unit_memcached # default: default_memcached # memcached = default_memcached ########################################################################### [system] # doscan: # # Whether preload should monitor running processes and update its # model state. Normally you do want that, that's all preload is # about, but you may want to temporarily turn it off for various # reasons like testing and only make predictions. Note that if # scanning is off, predictions are made based on whatever processes # have been running when preload started and the list of running # processes is not updated at all. # # default: default_doscan doscan = default_doscan # dopredict: # # Whether preload should make prediction and prefetch anything off # the disk. Quite like doscan, you normally want that, that's the # other half of what preload is about, but you may want to temporarily # turn it off, to only train the model for example. Note that # this allows you to turn scan/predict or or off on the fly, by # modifying the config file and signalling the daemon. # # default: default_dopredict dopredict = default_dopredict # autosave: # # Preload will automatically save the state to disk every # autosave period. This is only relevant if doscan is set to true. # Note that some janitory work on the model, like removing entries # for files that no longer exist happen at state save time. So, # turning off autosave completely is not advised. # # unit: unit_autosave # default: default_autosave # autosave = default_autosave # mapprefix: # # A list of path prefixes that controll which mapped file are to # be considered by preload and which not. The list items are # separated by semicolons. Matching will be stopped as soon as # the first item is matched. For each item, if item appears at # the beginning of the path of the file, then a match occurs, and # the file is accepted. If on the other hand, the item has a # exclamation mark as its first character, then the rest of the # item is considered, and if a match happens, the file is rejected. # For example a value of !/lib/modules;/ means that every file other # than those in /lib/modules should be accepted. In this case, the # trailing item can be removed, since if no match occurs, the file is # accepted. It's advised to make sure /dev is rejected, since # preload doesn't special-handle device files internally. # # Note that /lib matches all of /lib, /lib64, and even /libexec if # there was one. If one really meant /lib only, they should use # /lib/ instead. # # default: (empty list, accept all) mapprefix = /usr/;/lib;/var/cache/;!/ # exeprefix: # # The syntax for this is exactly the same as for mapprefix. The only # difference is that this is used to accept or reject binary exectuable # files instead of maps. # # default: (empty list, accept all) exeprefix = !/usr/sbin/;!/usr/local/sbin/;/usr/;!/ # maxprocs # # Maximum number of processes to use to do parallel readahead. If # equal to 0, no parallel processing is done and all readahead is # done in-process. Parallel readahead supposedly gives a better I/O # performance as it allows the kernel to batch several I/O requests # of nearby blocks. # # default: default_maxprocs processes = default_maxprocs # sortstrategy # # The I/O sorting strategy. Ideally this should be automatically # decided, but it's not currently. One of: # # 0 -- SORT_NONE: No I/O sorting. # Useful on Flash memory for example. # 1 -- SORT_PATH: Sort based on file path only. # Useful for network filesystems. # 2 -- SORT_INODE: Sort based on inode number. # Does less house-keeping I/O than the next option. # 3 -- SORT_BLOCK: Sort I/O based on disk block. Most sophisticated. # And useful for most Linux filesystems. # # default: default_sortstrategy sortstrategy = default_sortstrategy preload-0.6.4/src/confkeys.h0000664000076400007640000000130311077747205012672 00000000000000confkey(model, integer, cycle, 20, seconds) confkey(model, boolean, usecorrelation, true, -) confkey(model, integer, minsize, 2000000, bytes) confkey(model, integer, memtotal, -10, signed_integer_percent) confkey(model, integer, memfree, 50, signed_integer_percent) confkey(model, integer, memcached, 0, signed_integer_percent) confkey(system, boolean, doscan, true, -) confkey(system, boolean, dopredict, true, -) confkey(system, integer, autosave, 3600, seconds) confkey(system, string_list, mapprefix, NULL, -) confkey(system, string_list, exeprefix, NULL, -) confkey(system, integer, maxprocs, 30, processes) confkey(system, enum, sortstrategy, 3, -) preload-0.6.4/src/state.h0000664000076400007640000001321511077747205012176 00000000000000#ifndef STATE_H #define STATE_H #include /* preload_map_t: structure holding information * about a mapped section. */ typedef struct _preload_map_t { char *path; /* absolute path of the mapped file. */ size_t offset; /* in bytes. */ size_t length; /* in bytes. */ int update_time; /* last time it was probed. */ /* runtime: */ int refcount; /* number of exes linking to this. */ double lnprob; /* log-probability of NOT being needed in next period. */ int seq; /* unique map sequence number. */ int block; /* on-disk location of the start of the map. */ int priv; /* for private local use of functions. */ } preload_map_t; /* preload_exemap_t: structure holding information * about a mapped section in an exe. */ typedef struct _preload_exemap_t { preload_map_t *map; double prob; /* probability that this map is used when exe is running. */ } preload_exemap_t; /* preload_exe_t: structure holding information * about an executable. */ typedef struct _preload_exe_t { char *path; /* absolute path of the executable. */ int time; /* total time that this has been running, ever. */ int update_time; /* last time it was probed. */ GSet *markovs; /* set of markov chains with other exes. */ GSet *exemaps; /* set of exemap structures. */ /* runtime: */ size_t size; /* sum of the size of the maps, in bytes. */ int running_timestamp; /* last time it was running. */ int change_timestamp; /* time started/stopped running. */ double lnprob; /* log-probability of NOT being needed in next period. */ int seq; /* unique exe sequence number. */ } preload_exe_t; #define exe_is_running(exe) ((exe)->running_timestamp >= state->last_running_timestamp) /* preload_markov_t: a 4-state continuous-time Markov chain. */ typedef struct _preload_markov_t { preload_exe_t *a, *b; /* involved exes. */ int time; /* total time that both exes have been running simultaneously (state 3). */ double time_to_leave[4]; /* mean time to leave each state. */ int weight[4][4]; /* number of times we've gone from state i to state j. * weight[i][i] is the number of times we have left * state i. (sum over weight[i][j] for j<>i essentially. */ /* runtime: */ /* state 0: no-a, no-b, * state 1: a, no-b, * state 2: no-a, b, * state 3: a, b. */ int state; /* current state */ int change_timestamp; /* time entered the current state. */ } preload_markov_t; #define markov_other_exe(markov,exe) ((markov)->a == (exe) ? (markov)->b : (markov)->a) #define markov_state(markov) ((exe_is_running((markov)->a)?1:0)+(exe_is_running((markov)->b)?2:0)) /* preload_state_t: persistent state (the model) */ typedef struct _preload_state_t { /* total seconds that preload have been running, * from the beginning of the persistent state. */ int time; /* maps applications known by preload, indexed by * exe name, to a preload_exe_t structure. */ GHashTable *exes; /* set of applications that preload is not interested * in. typically it is the case that these applications * are too small to be a candidate for preloading. * mapped value is the size of the binary (sum of the * length of the maps. */ GHashTable *bad_exes; /* set of maps used by known executables, indexed by * preload_map_t structures. */ GHashTable *maps; /* runtime: */ GSList *running_exes; /* set of exe structs currently running. */ GPtrArray *maps_arr; /* set of maps again, in a sortable array. */ int map_seq; /* increasing sequence of unique numbers to assign to maps. */ int exe_seq; /* increasing sequence of unique numbers to assign to exes. */ int last_running_timestamp; /* last time we checked for processes running. */ int last_accounting_timestamp; /* last time we did accounting on running times, etc. */ gboolean dirty; /* whether new scan has been performed since last save */ gboolean model_dirty; /* whether new scan has been performed but no model update yet */ preload_memory_t memstat; /* system memory stats. */ int memstat_timestamp; /* last time we updated memory stats. */ } preload_state_t; /* state */ extern preload_state_t state[1]; void preload_state_load (const char *statefile); void preload_state_save (const char *statefile); void preload_state_dump_log (void); void preload_state_run (const char *statefile); void preload_state_free (void); void preload_state_register_exe (preload_exe_t *exe, gboolean create_markovs); void preload_state_unregister_exe (preload_exe_t *exe); /* map */ /* duplicates path */ preload_map_t * preload_map_new (const char *path, size_t offset, size_t length); void preload_map_free (preload_map_t *map); void preload_map_ref (preload_map_t *map); void preload_map_unref (preload_map_t *map); size_t preload_map_get_size (preload_map_t *map); guint preload_map_hash (preload_map_t *map); gboolean preload_map_equal (preload_map_t *a, preload_map_t *b); /* exemap */ preload_exemap_t * preload_exemap_new (preload_map_t *map); void preload_exemap_free (preload_exemap_t *exemap); void preload_exemap_foreach (GHFunc func, gpointer user_data); /* markov */ preload_markov_t * preload_markov_new (preload_exe_t *a, preload_exe_t *b, gboolean initialize); void preload_markov_free (preload_markov_t *markov, preload_exe_t *from); void preload_markov_state_changed (preload_markov_t *markov); double preload_markov_correlation (preload_markov_t *markov); void preload_markov_foreach (GFunc func, gpointer user_data); /* exe */ /* duplicates path */ preload_exe_t * preload_exe_new (const char *path, gboolean running, GSet *exemaps); void preload_exe_free (preload_exe_t *); preload_exemap_t * preload_exe_map_new (preload_exe_t *exe, preload_map_t *map); #endif preload-0.6.4/src/preload.8.i0000664000076400007640000000044011077747205012647 00000000000000[SIGNALS] On receipt of a SIGHUP, the daemon will close and reopen its log file, and reread the configuratoin file. On receipt of a SIGUSR1, the daemon dumps the currently loaded configuration into the log file. On receipt of a SIGUSR2, the daemon saves its state into the state file. preload-0.6.4/src/prophet.h0000664000076400007640000000022111077747205012530 00000000000000#ifndef PROPHET_H #define PROPHET_H void preload_prophet_predict (gpointer data); void preload_prophet_readahead (GPtrArray *maps_arr); #endif preload-0.6.4/src/common.h0000664000076400007640000000236411077747205012351 00000000000000#ifndef PRELOAD_COMMON_H #define PRELOAD_COMMON_H #if HAVE_CONFIG_H # include #endif /* TODO: make includes (in C files too) conditional */ #include #include #include #include #include #include #include #ifdef HAVE_SYS_TYPES_H #include #endif #ifdef HAVE_SYS_STAT_H #include #endif #include #ifdef HAVE_STRINGIZE # define STRINGIZE2(x) #x #else # define STRINGIZE2(x) "?" # error Your C preprocessor does not support stringize operator. #endif #define STRINGIZE(x) STRINGIZE2(x) #if 0 # define GSet GSList # define g_set_new() NULL # define g_set_add(s,v) (s = g_slist_prepend (s,v)) # define g_set_remove(s,v) (s = g_slist_remove (s,v)) # define g_set_free(s) g_slist_free (s) # define g_set_size(s) g_slist_length (s) # define g_set_foreach g_slist_foreach #else # define GSet GPtrArray # define g_set_new() g_ptr_array_new () # define g_set_add(s,v) g_ptr_array_add (s, v) # define g_set_remove(s,v) g_ptr_array_remove_fast (s, v) # define g_set_free(s) g_ptr_array_free (s, TRUE) # define g_set_size(s) ((s)->len) # define g_set_foreach g_ptr_array_foreach #endif #define FILELEN 512 #define FILELENSTR "511" #endif preload-0.6.4/src/proc.c0000664000076400007640000001413211077747205012013 00000000000000/* proc.c - preload process listing routines * * Copyright (C) 2005 Behdad Esfahbod * Copyright (C) 2004 Soeren Sandmann (sandmann@daimi.au.dk) * * This file is part of preload. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301 USA */ #include "common.h" #include "log.h" #include "proc.h" #include "conf.h" #include "state.h" #include #include /* now here is the nasty stuff: ideally we want to ignore/get-rid-of * deleted binaries and maps, BUT, preLINK, renames and later deletes * them all the time, to replace them with (supposedly better) prelinked * ones. if we go by ignoring deleted files, we end up losing all precious * information we have gathered. can't afford that. what we do is to * consider the renamed file as the original file. in other words, when * prelink renames /bin/bash to /bin/bash.#prelink#.12345, we will behave * just like it was still /bin/bash. that almost solves the problem. * fortunately prelink does not change map offset/length, only fills in * the linking addresses. */ static gboolean sanitize_file (char *file) { char *p; if (*file != '/') /* not a file-backed object */ return FALSE; /* get rid of prelink foo and accept it */ p = strstr (file, ".#prelink#."); if (p) { *p = '\0'; return TRUE; } /* and (non-prelinked) deleted files */ if (strstr (file, "(deleted)")) return FALSE; return TRUE; } static gboolean accept_file (char *file, char * const *prefix) { if (prefix) for (; *prefix; prefix++) { const char *p = *prefix; gboolean accept; if (*p == '!') { p++; accept = FALSE; } else { accept = TRUE; } if (!strncmp (file, p, strlen (p))) return accept; } /* accept if no match */ return TRUE; } size_t proc_get_maps (pid_t pid, GHashTable *maps, GSet **exemaps) { char name[32]; FILE *in; size_t size = 0; char buffer[1024]; if (exemaps) *exemaps = g_set_new (); g_snprintf (name, sizeof (name) - 1, "/proc/%d/maps", pid); in = fopen (name, "r"); if (!in) { /* this may fail for a variety of reason. process terminated * for example, or permission denied. */ return 0; } while (fgets (buffer, sizeof (buffer) - 1, in)) { char file[FILELEN]; long start, end, offset, length; int count; count = sscanf (buffer, "%lx-%lx %*15s %lx %*x:%*x %*u %"FILELENSTR"s", &start, &end, &offset, file); if (count != 4 || !sanitize_file (file) || !accept_file (file, conf->system.mapprefix)) continue; length = end - start; size += length; if (maps || exemaps) { gpointer orig_map; preload_map_t *map; gpointer value; map = preload_map_new (file, offset, length); if (maps) { if (g_hash_table_lookup_extended (maps, map, &orig_map, &value)) { preload_map_free (map); map = (preload_map_t *)orig_map; } } if (exemaps) { preload_exemap_t *exemap; exemap = preload_exemap_new (map); g_set_add (*exemaps, exemap); } } } fclose (in); return size; } static gboolean all_digits (const char *s) { for (; *s; ++s) { if (!isdigit (*s)) return FALSE; } return TRUE; } void proc_foreach (GHFunc func, gpointer user_data) { DIR *proc; struct dirent *entry; pid_t selfpid = getpid (); proc = opendir ("/proc"); if (!proc) g_error ("failed opening /proc: %s", strerror (errno)); while ((entry = readdir (proc))) { if (entry->d_name && all_digits (entry->d_name)) { pid_t pid; char name[32]; char exe_buffer[FILELEN]; int len; pid = atoi (entry->d_name); if (pid == selfpid) continue; g_snprintf (name, sizeof (name) - 1, "/proc/%s/exe", entry->d_name); len = readlink (name, exe_buffer, sizeof (exe_buffer)); if (len <= 0 /* error occured */ || len == sizeof (exe_buffer) /* name didn't fit completely */) continue; exe_buffer[len] = '\0'; if (!sanitize_file (exe_buffer) || !accept_file (exe_buffer, conf->system.exeprefix)) continue; func (GUINT_TO_POINTER (pid), exe_buffer, user_data); } } closedir (proc); } #define open_file(filename) G_STMT_START { \ int fd, len; \ len = 0; \ if ((fd = open(filename, O_RDONLY)) != -1) { \ if ((len = read(fd, buf, sizeof (buf) - 1)) < 0) \ len = 0; \ close (fd); \ } \ buf[len] = '\0'; \ } G_STMT_END #define read_tag(tag, v) G_STMT_START { \ const char *b; \ b = strstr(buf, tag" "); \ if (b) sscanf(b, tag" %d", &(v)); \ } G_STMT_END #define read_tag2(tag, v1, v2) G_STMT_START { \ const char *b; \ b = strstr(buf, tag" "); \ if (b) sscanf(b, tag" %d %d", &(v1), &(v2)); \ } G_STMT_END void proc_get_memstat (preload_memory_t *mem) { static int pagesize = 0; char buf[4096]; memset (mem, 0, sizeof (*mem)); if (!pagesize) pagesize = getpagesize (); open_file ("/proc/meminfo"); read_tag ("MemTotal:", mem->total); read_tag ("MemFree:", mem->free); read_tag ("Buffers:", mem->buffers); read_tag ("Cached:", mem->cached); open_file ("/proc/vmstat"); read_tag ("pgpgin", mem->pagein); read_tag ("pgpgout", mem->pageout); if (!mem->pagein) { open_file ("/proc/stat"); read_tag2 ("page", mem->pagein, mem->pageout); } mem->pagein *= pagesize / 1024; mem->pageout *= pagesize / 1024; if (!mem->total || !mem->pagein) g_warning ("failed to read memory stat, is /proc mounted?"); } preload-0.6.4/src/gen.preload.conf.sh0000775000076400007640000000026411077747205014366 00000000000000#!/bin/sh IN="$1" KEYS="$2" I='[ \t]*\([^, \t]*\)[ \t]*' SEDSCRIPT=`sed -e "s/confkey($I,$I,$I,$I,$I)/s@default_\3@\4@g; s@unit_\3@\5@g;/;" < "$KEYS"` sed -e "$SEDSCRIPT" "$IN" preload-0.6.4/src/Makefile.in0000664000076400007640000005352111171453150012742 00000000000000# Makefile.in generated by automake 1.10.2 from Makefile.am. # @configure_input@ # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, # 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. # This Makefile.in is free software; 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\ echo Failed to update preload.8, the man page may be outdated >&2; \ (test -f "$@" || echo help2man is required to generate this file. >> "$@")); install-data-hook: @cd "$(DESTDIR)$(man8dir)" && gzip -c preload.8 > preload.8.gz.tmp && mv preload.8.gz.tmp preload.8.gz && $(RM) preload.8 uninstall-hook: $(RM) "$(DESTDIR)$(man8dir)/preload.8.gz" preload.conf.debug: $(MAKE) $(AM_MAKEFLAGS) preload.conf cp preload.conf preload.conf.debug run: $(RUNPREQ) $(RUNCMD) run-valgrind: $(RUNPREQ) valgrind --tool=memcheck --leak-check=yes $(RUNCMD) run-gdb: $(RUNPREQ) gdb --args $(RUNCMD) errors: clear @$(MAKE) $(AM_MAKEFLAGS) clean all > /dev/null # Tell versions [3.59,3.63) of GNU make to not export all variables. # Otherwise a system limit (for SysV at least) may be exceeded. .NOEXPORT: preload-0.6.4/src/preload.h0000664000076400007640000000064711077747205012511 00000000000000#ifndef PRELOAD_H #define PRELOAD_H #include #define DEFAULT_CONFFILE SYSCONFDIR "/" PACKAGE ".conf" #define DEFAULT_STATEFILE PKGLOCALSTATEDIR "/" PACKAGE ".state" #define DEFAULT_LOGFILE LOGDIR "/" PACKAGE ".log" #define DEFAULT_LOGLEVEL 4 #define DEFAULT_NICELEVEL 15 extern const char *conffile; extern const char *statefile; extern const char *logfile; extern int foreground; extern int nicelevel; #endif preload-0.6.4/src/Makefile.am0000664000076400007640000000416511171452634012737 00000000000000LDADD = \ -lm \ $(GLIB_LIBS) AM_CPPFLAGS = \ $(GLIB_CFLAGS) \ -DSYSCONFDIR='"${sysconfdir}"' \ -DLOGDIR='"${logdir}"' \ -DPKGLOCALSTATEDIR='"${pkglocalstatedir}"' preload.o cmdline.o preload.8: Makefile sbin_PROGRAMS = preload preload_SOURCES = \ cmdline.c \ cmdline.h \ common.h \ conf.c \ conf.h \ confkeys.h \ log.c \ log.h \ spy.c \ spy.h \ preload.c \ preload.h \ proc.c \ proc.h \ prophet.c \ prophet.h \ readahead.c \ readahead.h \ state.c \ state.h EXTRA_DIST = \ preload.8.i \ preload.conf.in \ gen.preload.conf.sh \ runtests.sh TESTS = runtests.sh check: preload.conf DISTCLEANFILES = preload.conf preload.state preload.log nodist_sysconf_DATA = preload.conf preload.conf: gen.preload.conf.sh preload.conf.in confkeys.h $(SHELL) $^ > $@.tmp && mv $@.tmp $@ MAINTAINERCLEANFILES = preload.8 dist_man_MANS = preload.8 $(srcdir)/preload.8: cmdline.c ../configure.ac preload.8.i $(MAKE) $(AM_MAKEFLAGS) preload @echo "Creating $@ using help2man(1)" @$(top_builddir)/missing --run \ help2man --no-info --section=8 --include=preload.8.i \ --help-option="-H" --output="$@.tmp" \ --name 'Adaptive readahead daemon' ./preload \ && mv "$@.tmp" "$@" \ || ($(RM) "$@"; \ echo Failed to update preload.8, the man page may be outdated >&2; \ (test -f "$@" || echo help2man is required to generate this file. >> "$@")); install-data-hook: @cd "$(DESTDIR)$(man8dir)" && gzip -c preload.8 > preload.8.gz.tmp && mv preload.8.gz.tmp preload.8.gz && $(RM) preload.8 uninstall-hook: $(RM) "$(DESTDIR)$(man8dir)/preload.8.gz" ###################################################################### MAINTAINERCLEANFILES += preload.conf.debug preload.conf.debug: $(MAKE) $(AM_MAKEFLAGS) preload.conf cp preload.conf preload.conf.debug RUNPREQ = preload preload.conf.debug RUNCMD = ./preload -c preload.conf.debug -s preload.state -d $(ARGS) run: $(RUNPREQ) $(RUNCMD) run-valgrind: $(RUNPREQ) valgrind --tool=memcheck --leak-check=yes $(RUNCMD) run-gdb: $(RUNPREQ) gdb --args $(RUNCMD) errors: clear @$(MAKE) $(AM_MAKEFLAGS) clean all > /dev/null preload-0.6.4/src/log.c0000664000076400007640000000611711077747205011635 00000000000000/* log.c - preload logging routines * * Copyright (C) 2005 Behdad Esfahbod * * This file is part of preload. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301 USA */ #include "common.h" #include "log.h" #include "preload.h" #include int preload_log_level = DEFAULT_LOGLEVEL; static void preload_log (const char *log_domain, GLogLevelFlags log_level, const char *message, gpointer G_GNUC_UNUSED user_data) { time_t curtime; char *timestr; /* ignore unimportant messages */ if (log_level <= G_LOG_LEVEL_ERROR << preload_log_level) { curtime = time (NULL); timestr = ctime (&curtime); timestr[strlen (timestr) - 1] = '\0'; fprintf (stderr, "[%s] %s%s%s\n", timestr, log_domain ? log_domain : "", log_domain ? ": " : "", message); } if (log_level & G_LOG_FLAG_FATAL) { /*int *p;*/ preload_log (log_domain, 0, "Exiting", NULL); fflush (stdout); fflush (stderr); /* make a segfault */ /* p = NULL; *p = 0; */ exit (EXIT_FAILURE); } } void preload_log_init (const char *logfile) { if (logfile && *logfile) { int logfd; int nullfd; /* g_message ("opening log file %s", logfile); */ /* set up stdout, stderr to log and stdin to /dev/null */ if (0 > (nullfd = open ("/dev/null", O_RDONLY))) g_error ("cannot open %s: %s", "/dev/null", strerror (errno)); if (0 > (logfd = open (logfile, O_WRONLY | O_CREAT | O_APPEND, 0600))) g_error ("cannot open %s: %s", logfile, strerror (errno)); if ((dup2 (nullfd, STDIN_FILENO) != STDIN_FILENO) || (dup2 (logfd, STDOUT_FILENO) != STDOUT_FILENO) || (dup2 (logfd, STDERR_FILENO) != STDERR_FILENO)) g_error ("dup2: %s", strerror (errno)); close (nullfd); close (logfd); /* g_debug ("opening log file done"); */ } g_log_set_default_handler (preload_log, NULL); } void preload_log_reopen (const char *logfile) { int logfd; if (!(logfile && *logfile)) return; g_message ("reopening log file %s", logfile); fflush (stdout); fflush (stderr); if (0 > (logfd = open (logfile, O_WRONLY | O_CREAT | O_APPEND, 0600))) { g_warning ("cannot reopen %s: %s", logfile, strerror (errno)); return; } if ((dup2 (logfd, STDOUT_FILENO) != STDOUT_FILENO) || (dup2 (logfd, STDERR_FILENO) != STDERR_FILENO)) g_warning ("dup2: %s", strerror (errno)); close (logfd); g_message ("reopening log file %s done", logfile); } preload-0.6.4/src/spy.c0000664000076400007640000001176211077747205011671 00000000000000/* spy.c - preload data acquisation routines * * Copyright (C) 2005 Behdad Esfahbod * * This file is part of preload. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301 USA */ #include "common.h" #include "spy.h" #include "conf.h" #include "state.h" #include "proc.h" static GSList *state_changed_exes; static GSList *new_running_exes; static GHashTable *new_exes; /* for every process, check whether we know what it is, and add it * to appropriate list for further analysis. */ static void running_process_callback (pid_t pid, const char *path) { preload_exe_t *exe; g_return_if_fail (path); exe = g_hash_table_lookup (state->exes, path); if (exe) { /* already existing exe */ /* has it been running already? */ if (!exe_is_running (exe)) { new_running_exes = g_slist_prepend (new_running_exes, exe); state_changed_exes = g_slist_prepend (state_changed_exes, exe); } /* update timestamp */ exe->running_timestamp = state->time; } else if (!g_hash_table_lookup (state->bad_exes, path)) { /* an exe we have never seen before, just queue it */ g_hash_table_insert (new_exes, g_strdup (path), GUINT_TO_POINTER (pid)); } } /* for every exe that has been running, check whether it's still running * and take proper action. */ static void already_running_exe_callback (preload_exe_t *exe) { if (exe_is_running (exe)) new_running_exes = g_slist_prepend (new_running_exes, exe); else state_changed_exes = g_slist_prepend (state_changed_exes, exe); } /* there is an exe we've never seen before. check if it's a piggy one or * not. if yes, add it to the our farm, add it to the blacklist otherwise. */ static void new_exe_callback (char *path, pid_t pid) { gboolean want_it; size_t size; size = proc_get_maps (pid, NULL, NULL); if (!size) /* process died or something */ return; want_it = size >= (size_t)conf->model.minsize; if (want_it) { preload_exe_t *exe; GSet *exemaps; size = proc_get_maps (pid, state->maps, &exemaps); if (!size) { /* process just died, clean up */ g_set_foreach (exemaps, (GFunc)preload_exemap_free, NULL); g_set_free (exemaps); return; } exe = preload_exe_new (path, TRUE, exemaps); preload_state_register_exe (exe, TRUE); state->running_exes = g_slist_prepend (state->running_exes, exe); } else { g_hash_table_insert (state->bad_exes, g_strdup (path), GINT_TO_POINTER (size)); } } static void running_markov_inc_time (preload_markov_t *markov, int time) { if (markov->state == 3) markov->time += time; } static void running_exe_inc_time (gpointer G_GNUC_UNUSED key, preload_exe_t *exe, int time) { if (exe_is_running (exe)) exe->time += time; } /* adjust states on exes that change state (running/not-running) */ static void exe_changed_callback (preload_exe_t *exe) { exe->change_timestamp = state->time; g_set_foreach (exe->markovs, (GFunc)preload_markov_state_changed, NULL); } void preload_spy_scan (gpointer data) { /* scan processes, see which exes started running, which are not running * anymore, and what new exes are around. */ state_changed_exes = new_running_exes = NULL; new_exes = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL); /* mark each running exe with fresh timestamp */ proc_foreach ((GHFunc)running_process_callback, data); state->last_running_timestamp = state->time; /* figure out who's not running by checking their timestamp */ g_slist_foreach (state->running_exes, (GFunc)already_running_exe_callback, data); g_slist_free (state->running_exes); state->running_exes = new_running_exes; } /* update_model is run after scan, after some delay (half a cycle) */ void preload_spy_update_model (gpointer data) { int period; /* register newly discovered exes */ g_hash_table_foreach (new_exes, (GHFunc)new_exe_callback, data); g_hash_table_destroy (new_exes); /* and adjust states for those changing */ g_slist_foreach (state_changed_exes, (GFunc)exe_changed_callback, data); g_slist_free (state_changed_exes); /* do some accounting */ period = state->time - state->last_accounting_timestamp; g_hash_table_foreach (state->exes, (GHFunc)running_exe_inc_time, GINT_TO_POINTER (period)); preload_markov_foreach ((GFunc)running_markov_inc_time, GINT_TO_POINTER (period)); state->last_accounting_timestamp = state->time; } preload-0.6.4/src/log.h0000664000076400007640000000037511077747205011642 00000000000000#ifndef LOG_H #define LOG_H extern int preload_log_level; void preload_log_init (const char *logfile); void preload_log_reopen (const char *logfile); #define preload_is_debugging() (G_LOG_LEVEL_DEBUG <= G_LOG_LEVEL_ERROR << preload_log_level) #endif preload-0.6.4/aclocal.m40000664000076400007640000011147311171453144011752 00000000000000# generated automatically by aclocal 1.10.2 -*- Autoconf -*- # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, # 2005, 2006, 2007, 2008 Free Software Foundation, Inc. # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY, to the extent permitted by law; without # even the implied warranty of MERCHANTABILITY or FITNESS FOR A # PARTICULAR PURPOSE. m4_ifndef([AC_AUTOCONF_VERSION], [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.63],, [m4_warning([this file was generated for autoconf 2.63. 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We just wanted to have am__tar # and am__untar set. test -n "${am_cv_prog_tar_$1}" && break # tar/untar a dummy directory, and stop if the command works rm -rf conftest.dir mkdir conftest.dir echo GrepMe > conftest.dir/file AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar]) rm -rf conftest.dir if test -s conftest.tar; then AM_RUN_LOG([$am__untar /dev/null 2>&1 && break fi done rm -rf conftest.dir AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool]) AC_MSG_RESULT([$am_cv_prog_tar_$1])]) AC_SUBST([am__tar]) AC_SUBST([am__untar]) ]) # _AM_PROG_TAR preload-0.6.4/config.h.in0000664000076400007640000000527411171453167012143 00000000000000/* config.h.in. Generated from configure.ac by autoheader. */ /* Define to 1 if you have the header file. */ #undef HAVE_INTTYPES_H /* Define to 1 if you have the header file. */ #undef HAVE_LINUX_FS_H /* Define to 1 if you have the header file. */ #undef HAVE_MEMORY_H /* Define to 1 if you have the `readahead' function. */ #undef HAVE_READAHEAD /* Define to 1 if you have the header file. */ #undef HAVE_STDINT_H /* Define to 1 if you have the header file. */ #undef HAVE_STDLIB_H /* Define to 1 if cpp supports the ANSI # stringizing operator. */ #undef HAVE_STRINGIZE /* Define to 1 if you have the header file. */ #undef HAVE_STRINGS_H /* Define to 1 if you have the header file. */ #undef HAVE_STRING_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_STAT_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_TIMES_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_TYPES_H /* Define to 1 if you have the header file. */ #undef HAVE_UNISTD_H /* Name of package */ #undef PACKAGE /* Define to the address where bug reports for this package should be sent. */ #undef PACKAGE_BUGREPORT /* Define to the full name of this package. */ #undef PACKAGE_NAME /* Define to the full name and version of this package. */ #undef PACKAGE_STRING /* Define to the one symbol short name of this package. */ #undef PACKAGE_TARNAME /* Define to the version of this package. */ #undef PACKAGE_VERSION /* Define as the return type of signal handlers (`int' or `void'). */ #undef RETSIGTYPE /* Define to 1 if you have the ANSI C header files. */ #undef STDC_HEADERS /* Define to 1 if you can safely include both and . */ #undef TIME_WITH_SYS_TIME /* Enable extensions on AIX 3, Interix. */ #ifndef _ALL_SOURCE # undef _ALL_SOURCE #endif /* Enable GNU extensions on systems that have them. */ #ifndef _GNU_SOURCE # undef _GNU_SOURCE #endif /* Enable threading extensions on Solaris. */ #ifndef _POSIX_PTHREAD_SEMANTICS # undef _POSIX_PTHREAD_SEMANTICS #endif /* Enable extensions on HP NonStop. */ #ifndef _TANDEM_SOURCE # undef _TANDEM_SOURCE #endif /* Enable general extensions on Solaris. */ #ifndef __EXTENSIONS__ # undef __EXTENSIONS__ #endif /* Version number of package */ #undef VERSION /* Define to 1 if on MINIX. */ #undef _MINIX /* Define to 2 if the system does not provide POSIX.1 features except with this defined. */ #undef _POSIX_1_SOURCE /* Define to 1 if you need to in order for `stat' and other things to work. */ #undef _POSIX_SOURCE /* Define to empty if `const' does not conform to ANSI C. */ #undef const preload-0.6.4/ChangeLog0000664000076400007640000003736211171453135011670 000000000000002009-04-15 Behdad Esfahbod * NEWS: * configure.ac: Released preload-0.6.4. 2009-04-15 Behdad Esfahbod * src/Makefile.am: The source (and dot) builtin in POSIX /bin/sh does not search current dir. Use $(SHELL) instead. 2009-04-14 Behdad Esfahbod * src/Makefile.am: Better handle file generation failures. 2008-12-07 Behdad Esfahbod * src/preload.c (daemonize): Change umask from 0117 to 0007. 0117 means disaster if we end up creating a dir. 2008-11-24 Behdad Esfahbod * configure.ac: Require glib >= 2.14 * src/state.c (preload_state_tick2), (preload_state_tick), (preload_state_autosave), (preload_state_run): Use g_timeout_add_seconds instead of g_timeout_add. Patch from Jan Kantert. 2008-10-09 Behdad Esfahbod * src/preload.conf.in: Clarify exe/map matching. 2008-08-19 Behdad Esfahbod * src/cmdline.c: --nice was segfaulting. Fix it. 2008-07-28 Behdad Esfahbod * NEWS: * configure.ac: Released preload-0.6.3. 2008-07-28 Behdad Esfahbod * src/state.c (read_state): I just can't make releases. Make it parse the three-part version numbers, so state loading works again. 2008-07-28 Behdad Esfahbod * NEWS: * configure.ac: Released preload-0.6.2. 2008-07-28 Behdad Esfahbod * src/readahead.c (process_file): Correctly fix the previous fork craziness issue. Bug revealed to me by Kai Krakow. Also do O_NOATIME when readahead'ing. 2008-07-27 Behdad Esfahbod * Makefile.am: * RELEASING: Simplify release instructions. 2008-07-27 Behdad Esfahbod * NEWS: * configure.ac: Released preload-0.6.1. 2008-07-27 Behdad Esfahbod * src/readahead.c (wait_for_children), (process_file), (preload_readahead): Wait for children to exit. Fixes bug where preload was spawning thousands of processes. I have not fully understood how that happened, but the fix is right. Still investigating. 2008-07-24 Behdad Esfahbod * preload.init.in: Start it on runlevels 2345 by default. Leave it to distros to modify. 2008-07-23 Behdad Esfahbod * configure.ac: Post-release increment to 0.7 2008-07-23 Behdad Esfahbod * NEWS: * configure.ac: Released preload-0.6. 2008-07-23 Behdad Esfahbod * Makefile.am: Forget about preload.spec Also get rid of automatic ChangeLog generation. * ChangeLog: Add to repo! 2008-07-23 Behdad Esfahbod * src/readahead.c (process_file), (preload_readahead): Implement request merging. With this change, I have cherry-picked/reimplemented all the various patches and changes submitted to me for preload these past three years. This includes all the patches from Ubuntu and Fedora packagers. Thanks everyone! About time for a release now! 2008-07-23 Behdad Esfahbod * src/confkeys.h: Change default memory settings to be more conservative: consume 50% of free mem minus 10% of total, and none of the cached. * src/preload.conf.in: Rename system.maxproc key to system.maxprocs. * src/readahead.c (process_file): Implement parallel readahead. 2008-07-23 Behdad Esfahbod * preload.init.in: Default off in all runlevels. * src/conf.h: * src/confkeys.h: * src/preload.conf.in: Add two new config keys: system.maxproc and system.sortstrategy. The maxproc setting is not implemented yet. * src/state.h: * src/readahead.c (set_block), (map_block_compare), (process_file), (sort_by_block_or_inode), (sort_files), (preload_readahead): * src/state.c (preload_map_new), (read_map), (read_exe), (write_map): Implement all sort strategies. * src/state.c: Error handling cleanup. 2007-11-10 Behdad Esfahbod * preload.init.in, preload.sysconfig: Support running under ionice from init script. Default to idle io priority. 2007-11-10 Behdad Esfahbod * preload.logrotate.in: Compress rotated logs. 2007-11-10 Behdad Esfahbod * preload.sysconfig: Set verbose level to 1 in sysconfig file. 2007-11-10 Behdad Esfahbod * src/cmdline.c: Include cmd-line option default values in the man page. 2007-11-09 Behdad Esfahbod * src/prophet.c, src/readahead.c, src/readahead.h: Fix typo in compare function causing files not being sorted on path at all. 2007-11-09 Behdad Esfahbod * src/preload.conf.in: Add /lib64 and /var/cache to mapprefix 2007-11-09 Behdad Esfahbod * configure.ac, preload.spec.in: Remove RPM spec file template. Now that Fedora has one in the works, this one just falls outdated. 2007-05-11 Behdad Esfahbod * src/state.c: Plug file descriptor leak (Kari Pahula) 2007-05-11 Behdad Esfahbod * src/preload.conf.in, src/proc.c: Misc fixes. 2006-08-02 Behdad Esfahbod * configure.ac: Post-release version increment to 0.5. 2006-08-02 Behdad Esfahbod * RELEASING: Change release tag from RELEASE_X_Y to PRELOAD_X_Y. 2006-08-02 Behdad Esfahbod * Makefile.am: Make build rpm failure not fail release-check. 2006-08-02 Behdad Esfahbod * NEWS, configure.ac: preload-0.4 released. 2006-08-02 Behdad Esfahbod * TODO: Add ionice. 2006-04-05 Behdad Esfahbod * preload.init.in: Add LSB INIT INFO block. (patch from Kari Pahula) 2005-11-27 Behdad Esfahbod * src/preload.conf.in: Removed /usr/lib/locale blacklisting. We only readahead mapped areas, and that's not a problem for localarchive, no matter how huge that file may be. 2005-10-23 Behdad Esfahbod * TODO, src/conf.c, src/preload.conf.in, src/proc.c, src/prophet.c, src/state.h: Misc small fixes with handling prefix lists. 2005-10-07 Behdad Esfahbod * src/readahead.c: Removed extra copyright lines. We're not using their code yet. 2005-09-16 Behdad Esfahbod * src/proc.c: Fix the same pointer bug in accept_file too. God, and it's been working all this time?! 2005-09-16 Behdad Esfahbod * src/conf.c: Fix pointer bug in dump_log. 2005-09-13 Behdad Esfahbod * src/spy.c, src/state.c: Use g_assert_if_fail family instead of g_assert, at function entry points. 2005-09-08 Behdad Esfahbod * TODO: Add a few TODO items. Never hurts. 2005-09-07 Behdad Esfahbod * src/Makefile.am: Add preload.conf.debug to MAINTAINERCLEANFILES. 2005-09-06 Behdad Esfahbod * src/Makefile.am, src/runtests.sh: Get rid of src/preload.conf.debug in check target. 2005-09-06 Behdad Esfahbod * src/proc.c, src/state.c: Use long when reading/writing size_t types. Fixes problem on 64-bit archs. 2005-09-06 Behdad Esfahbod * configure.ac: We require glib >= 2.6 2005-09-06 Behdad Esfahbod * src/state.c: Err if duplicate objects found in state file, instead of failing assert. 2005-09-06 Behdad Esfahbod * README: Reflect moving of state file. 2005-09-06 Behdad Esfahbod * Makefile.am, NEWS, configure.ac, preload.spec.in, src/Makefile.am, src/prophet.c: Build structure fixes, to turn off rpmlint errors and warnings. The state file is placed in /var/lib/preload instead of /var/preload. 2005-09-06 Behdad Esfahbod * src/cmdline.c: Minor change in help2man string. 2005-09-02 Behdad Esfahbod * Makefile.am, src/Makefile.am, src/cmdline.c, src/state.c, src/state.h: Small fixes with the way manual is generated. 2005-09-01 Behdad Esfahbod * Makefile.am: Variable misnamed fixed. 2005-09-01 Behdad Esfahbod * configure.ac: Post-release version bump to 0.3. 2005-09-01 Behdad Esfahbod * configure.ac: One last fix. preload-0.2 released NOW. 2005-09-01 Behdad Esfahbod * Makefile.am, RELEASING: Last-minute fixes. 2005-09-01 Behdad Esfahbod * NEWS, configure.ac: preload-0.2 released. 2005-09-01 Behdad Esfahbod * .cvsignore, Makefile.am, README, RELEASING, configure.ac, preload.spec.in, doc/Makefile.am: Build system enhancement to provide release-publish make target. 2005-09-01 Behdad Esfahbod * Makefile.am, NEWS, README, configure.ac, preload.spec.in, src/runtests.sh: Getting ready for release. Version bumped up to 0.2. 2005-09-01 Behdad Esfahbod * doc/Makefile.am, doc/index.txt, doc/proposal.txt: Added. The initial proposal. 2005-09-01 Behdad Esfahbod * src/cmdline.c, src/prophet.c: Debugging levels assigned for printing all predicted exes and maps, with levels 9 and 10 respectively. 2005-09-01 Behdad Esfahbod * src/preload.conf.in, src/prophet.c, src/state.c: Cleanup bad_exes at autosave time. 2005-09-01 Behdad Esfahbod * TODO, src/confkeys.h: Decrease minsize. 2005-09-01 Behdad Esfahbod * src/cmdline.c, src/log.c, src/preload.c, src/preload.h: Add nice to the daemon. 2005-09-01 Behdad Esfahbod * src/conf.h, src/confkeys.h, src/preload.conf.in, src/spy.c, src/state.c, src/state.h: Better handling of bad exes. Don't read bad exes from state. 2005-09-01 Behdad Esfahbod * src/preload.conf.in, src/prophet.c: What a typo! Use max, not min. 2005-09-01 Behdad Esfahbod * src/conf.c, src/conf.h, src/confkeys.h, src/preload.conf.in, src/proc.c, src/proc.h, src/prophet.c, src/readahead.c: Use memory stats to determine how much to preload. 2005-09-01 Behdad Esfahbod * TODO, src/common.h, src/preload.c, src/preload.conf.in, src/proc.c, src/proc.h, src/prophet.c, src/state.c, src/state.h: Read memory stat from /proc. 2005-09-01 Behdad Esfahbod * src/prophet.c: Segfault fix. 2005-09-01 Behdad Esfahbod * THANKS, TODO, preload.spec.in, src/Makefile.am, src/prophet.c, src/readahead.c, src/readahead.h, src/state.h: Readahead implemented. 2005-08-31 Behdad Esfahbod * src/log.c, src/prophet.c, src/prophet.h, src/state.c, src/state.h: Prediction is completely working! 2005-08-31 Behdad Esfahbod * src/spy.c, src/state.c, src/state.h: Fixed markov accounting. 2005-08-31 Behdad Esfahbod * src/confkeys.h, src/preload.conf.in: Change default cycle from 30 seconds to 20. 2005-08-31 Behdad Esfahbod * src/prophet.c: Take correlation into account. 2005-08-31 Behdad Esfahbod * src/cmdline.c, src/common.h, src/conf.c, src/conf.h, src/confkeys.h, src/preload.conf.in, src/proc.c, src/proc.h, src/prophet.c, src/spy.c, src/state.c, src/state.h: Fixes a nasty bug in reading state. Adds GSet, an abstraction for set that may use a GSList or GPtrArray as the implementation. Implements the core of prediction. 2005-08-30 Behdad Esfahbod * src/.cvsignore, src/Makefile.am, src/preload.conf.debug, src/prophet.c, src/state.c, src/state.h: Added _foreach functions for markovs and exemaps. 2005-08-29 Behdad Esfahbod * src/state.c: Do not save at exit time if model not changed. 2005-08-29 Behdad Esfahbod * src/Makefile.am, src/conf.c, src/conf.h, src/confkeys.h, src/preload.conf.debug, src/preload.conf.in, src/prophet.c, src/prophet.h, src/spy.c, src/state.c, src/state.h: Added prophet stub, the prediction module. 2005-08-29 Behdad Esfahbod * preload.logrotate.in: Use kill -HUP instead of condrestart in post logrotate. 2005-08-29 Behdad Esfahbod * TODO, src/conf.c, src/conf.h, src/confkeys.h, src/preload.conf.debug, src/preload.conf.in, src/proc.c: Added configuration keys to whitelist/blacklist files that should be considered by preload based on their path. 2005-08-28 Behdad Esfahbod * README: Typo fixed. 2005-08-28 Behdad Esfahbod * src/.cvsignore, src/Makefile.am, src/conf.c, src/conf.h, src/log.c, src/log.h, src/preload.8.i, src/preload.c, src/preload.h: Better log and signal handling, all documented in the man page too. 2005-08-28 Behdad Esfahbod * README, preload.spec.in, preload.sysconfig, src/.cvsignore, src/Makefile.am, src/state.c: Changed the meaning of the version number. Added a README file. Moved man page to section 8 instead of 1. 2005-08-28 Behdad Esfahbod * src/proc.c: Handle prelink mess. 2005-08-28 Behdad Esfahbod * src/state.c: Use tabs in preload.state for better visual format. 2005-08-28 Behdad Esfahbod * Makefile.am: Oops. missing is for rules that create a file. Removing it back. 2005-08-28 Behdad Esfahbod * Makefile.am: Add missing to the rpm build rule. 2005-08-28 Behdad Esfahbod * preload.sysconfig: Added. 2005-08-28 Behdad Esfahbod * Makefile.am, configure.ac, preload.init.in, preload.spec.in, src/confkeys.h, src/log.c, src/preload.c, src/preload.conf.in, src/state.c, src/state.h: Misc fixes to make it installable and running. Added a /etc/sysconfig/preload file that is used by the initscript for configuration about when/how to run the daemon. Moreover, kill -USR2 now instructs the daemon to save state, instead of spewing out lots of nonsense in the log. 2005-08-26 Behdad Esfahbod * configure.ac, src/Makefile.am, src/conf.h, src/confkeys.h, src/preload.conf.debug, src/runtests.sh: Misc. 2005-08-26 Behdad Esfahbod * src/state.c: Reordering functions for more readability. 2005-08-26 Behdad Esfahbod * src/state.c: Reorganized the spagetti that the state loading code was. Weirdly enough, the new code, while much more modularized, doesn't look as /beautiful/ as the old code :-(. 2005-08-26 Behdad Esfahbod * src/common.h, src/spy.c, src/state.c, src/state.h: State save support complete. 2005-08-25 Behdad Esfahbod * src/log.c, src/state.c: State save structure written. 2005-08-25 Behdad Esfahbod * Makefile.am: Minor. 2005-08-25 Behdad Esfahbod * THANKS: Thanking Google Summer of Code more explicitly, as per request of chrisd ;). 2005-08-25 Behdad Esfahbod * src/common.h, src/log.c, src/preload.c, src/proc.c, src/spy.c, src/state.c, src/state.h: State loading written. 2005-08-25 Behdad Esfahbod * TODO: Removed done tasks. 2005-08-23 Behdad Esfahbod * preload.init.in: Silently quit if less than 384MB of ram. 2005-08-23 Behdad Esfahbod * .cvsignore, Makefile.am, configure.ac, preload.init.in, preload.logrotate.in, preload.spec.in, src/Makefile.am, src/cmdline.c, src/conf.c, src/preload.h, src/state.c: Fedora compatible packaging. 2005-08-23 Behdad Esfahbod * TODO, src/Makefile.am, src/preload.c, src/preload.conf.in, src/proc.c, src/spy.c, src/state.c, src/state.h: Markov chain model training landed. 2005-08-23 Behdad Esfahbod * src/.cvsignore, src/Makefile.am: More build fixes. 2005-08-23 Behdad Esfahbod * src/cmdline.c: Typo fixed. 2005-08-23 Behdad Esfahbod * src/Makefile.am, src/cmdline.c, src/proc.c, src/runtests.sh, src/spy.c: Using help2man(1) now to produce a man page. 2005-08-23 Behdad Esfahbod * TODO, src/.cvsignore, src/Makefile.am, src/cmdline.c, src/common.h, src/conf.c, src/conf.h, src/confkeys.h, src/log.h, src/preload.c, src/preload.conf.debug, src/preload.conf.in, src/preload.h, src/proc.c, src/proc.h, src/runtests.sh, src/spy.c, src/spy.h, src/state.c, src/state.h: Initial data acquisation implementation using glib. 2005-08-22 Behdad Esfahbod * Makefile.am, src/Makefile.am: Make dist fixes. 2005-08-22 Behdad Esfahbod * src/.cvsignore, src/Makefile.am, src/cmdline.c, src/common.h, src/conf.c, src/conf.h, src/confkeys.h, src/gen.preload.conf.sh, src/log.c, src/preload.c, src/preload.conf.in, src/state.c, src/state.h: Configuration and main loop support using glib. 2005-08-20 Behdad Esfahbod * .cvsignore, .indent.pro, AUTHORS, Makefile.am, NEWS, README, README-alpha, THANKS, TODO, bootstrap, configure.ac, preload.spec.in, COPYING, src/Makefile.am, src/cmdline.c, src/cmdline.h, src/common.h, src/conf.c, src/conf.h, src/log.c, src/log.h, src/preload.c, src/preload.h, src/state.c, src/state.h: Initial import of the infrastructure. 2005-08-20 Behdad Esfahbod * .cvsignore, .indent.pro, AUTHORS, Makefile.am, NEWS, README, README-alpha, THANKS, TODO, bootstrap, configure.ac, preload.spec.in, COPYING, src/Makefile.am, src/cmdline.c, src/cmdline.h, src/common.h, src/conf.c, src/conf.h, src/log.c, src/log.h, src/preload.c, src/preload.h, src/state.c, src/state.h: Initial revision preload-0.6.4/README-alpha0000664000076400007640000000050611077747205012060 00000000000000This source distribution of preload corresponds to an alpha release that is unstable and not ready for production systems. Use at your own risk. Generally those versions with an odd minor (second) component in their version number are alpha releases, while those with an even minor component are stable production releases. preload-0.6.4/preload.sysconfig0000664000076400007640000000046711077747204013476 00000000000000# Miminum memory that the system should have for preload to be launched. # In megabytes. MIN_MEMORY="256" # Command-line arguments to pass to the daemon. Read preload(8) man page # for available options. PRELOAD_OPTS="--verbose 1" # Option to call ionice with. Leave empty to skip ionice. IONICE_OPTS="-c3" preload-0.6.4/doc/0000777000076400007640000000000011171453167010737 500000000000000preload-0.6.4/doc/proposal.txt0000664000076400007640000002153311077747204013264 00000000000000Subject: "Bounty proposal: `preload'ing the desktop" WHO Behdad Esfahbod http://behdad.org/ behdad behdad.org NAME preload - an intelligent readahead agent SPEC VERSION 1.0, June 2005 SUBMITTED TO Google Summer of Code, June 2005 MENTORING ORGANIZATION Fedora Core SYNOPSIS preload is an intelligent agent that monitors applications that a user runs, and from analyzing this data, predicts what applications the user might run in the near future, and fetches those binaries and their dependencies (shared objects) into memory for faster startup times. When run by the root user, preload takes into account probabilities that individual users may login now, and proceeds with prediction for faster login times. preload is desktop-environment agnostic. GOALS The goal here is to make application startup times shorter. We exploit the fact that most users have a very static set of applications that they use on a regular basis. For me for example, these applications are gnome-terminal, firefox, gaim, xmms, and skype. I start gnome-terminal and firefox as soon as I login and start gaim and xmms soon after. Add to these the GNOME desktop processes like nautilus, gnome-panel, panel applets, and shared objects they depend on, and you get a few hundred megabytes of binary objects that can be happily prefetched into page cache when GDM is waiting for me to login. preload makes this happen. That should drastically decrease the login time, and may have positive effects later on too. PROJECT DETAILS There are two main parts to preload, the data gathering agent, and the predictor agent. The two agents may or may not be implemented in the same process. The data gathering agent is started when a user logs in. A good place to start it is to drop it into /etc/X11/xinit/xinitrc.d. When started, it will gather information about running applications regularly, say once a minute, load permitting. The list of running applications is taken from the output of xlsclients(1), and for each application, the list of its maps is fetched from /proc. The latter can be performed lazily and results would be cached: There's no need to fetch maps for xmms every single minute, only once per run. Anyway, this data is gathered and sorted out and dumped into a database (a binary file format) for use by the predictor agent. There are a bunch of ways to make the database compact in size. Data acquisition can be stopped when screensaver is detected to be running, to not credit the running applications too much during idle times. The predictor agent is an intelligent agent that upon reading the gathered data and the list of currently running applications, predicts which application is most probably going to be run first in the coming minutes. We model the problem as a Bayesian system, and assign probabilities to each application, and then considering these probabilities and shared objects that each application depends on, we sort the shared objects in a priority list to be readahead, and perform that. Enough care is taken for the agent to not get in the way of the user. It monitors user activity, system load, data and page cache memory size, etc, before deciding to jump in. It is worth noting that the predictor agent has an exponentially fading memory, such that if a user's habits change and he starts using epiphany instead of firefox, after a few days the predictor understands that although firefox has been running every single session for a few months now, but that's part of history and epiphany is to be expected more often. The problem can be seen as an stochastic Markov chain whose states are members of the power set of the set of all applications that the user may run. So for example the Markov chain would tell us that most of the time the user starts at the state corresponding to the set of running applications {gnome-session}, and from that state almost always goes to the state corresponding to the set of running applications {gnome-session, gnome-settings-daemon, metacity, gnome-volume-manager, gnome-panel, nautilus, eggcups, wnck-applet, gweather-applet, stickeynotes-applet, multiload-applet, clock-applet, ...}, and from that state, most of the time goes to the state that has the same set of applications union {firefox, gnome-terminal}, or some other times simply {xmms}... If we can build this Markov chain, we can proceed with predictions, but training this Markov chain based on our training data is something better not tried. This model is too complex for the problem and will surely overfit. To overcome this shortcoming, we make independency assumptions and model every two applications in a four-state Markov chain. So for example we have a Markov chain for the pair of applications firefox and gnome-terminal, another for firefox and gnome-panel, another for firefox and xmms, and each of these Markov chains models the correlation between the state of the two applications involved. When we want to predict the probability that firefox is run, we simply multiply (using log-probabilities, we add) the individual probabilities from individual Markov chains that firefox forms with all other involved applications. For example, if gnome-terminal is run but not firefox, the Markov chain modeling these two applications will tell us that most of the time when gnome-terminal is launched, firefox is launched soon after... The above description is a simplification of the model I have in mind. In the more sophisticated model, it is not only a single probability that is assigned to edges in the Markov chains, but the time that takes for the state to change is fit with a probability distribution, so we can have an idea whether the state change is going to happen soon, and we take this into consideration when predicting. The probability distribution that we fit most probably would be a memory-less distribution, Poisson is a good candidate. Finally, the whole model is subject to change, should experiments show that it falls short. When preload is run as the root user (by GDM or another DM, or during the boot process), it takes into consideration the probabilities that each user may show up and login, and from there continues with normal prediction. Again, being a Bayesian system, it doesn't pick one user, but all active users, with probabilities. So for example if both active users of the machine run GNOME desktop and firefox, these applications and their dependencies will be fetched first, and after that applications used by the most active user of the machine. To summarize, preload is a generic readahead agent. It helps the page cache warm up in a learnable manner. A GNOME-specific readahead agent can be written without digging into machine learning, by simply looking at what gnome-session is going to run, but the approach proposed here works for all applications and desktops and even a mixture of them. I believe that an agent like what is proposed here can drastically decrease the login time, should it have had a few seconds to fetch stuff before the user logs in (but that is almost always the case, be it the time the user is typing user/password, or simply the login screen is sitting there waiting for the user to come back.) However whether it has any measurable effects after the login peek is passed and the cache is warmed up is something to wait and see. But then again, decreasing the login time is enough a motivation to experiment. The bad news is that simply monitoring what applications are currently running is too small information to predict what the user is going to run next, but this level of genericity is one of the design goals and should not be sacrificed. PROJECT SCHEDULE A prototype will be coded using Bash and Python scripts, using the basic model described here. This should not take more than two weeks. For the next five weeks the model will be improved, until the desired level of prediction is achieved. Alternate models will be examined in this period. After working out the model and not later than eight weeks from the beginning of the project, an efficient implementation in C will be started and finished in the remaining time. TARGETED BIO I am a Graduate student in Computer Science. Since I passed a graduate Machine Learning course last Fall, I have been thinking about using ML techniques in Open Source software. When thinking about ways to reduce the login time, I came up with the ideas presented here, and I think they are worth giving a try. 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Manual pages and other user documentation are kept separately. An index of these documents and their purpose follows. Please note that many of these documents ARE outdated and contain information that is no longer true. Each document should only be judged with the date that it's signed with. * proposal.txt: Original proposal for the preload daemon, submitted to (first) Google Summer of Code (2005) program. preload-0.6.4/NEWS0000664000076400007640000000530311171453127010604 00000000000000preload 0.6.4 release ===================== - Make build work with bash 4. - Require glib >= 2.14, use g_timeout_add_seconds(). - Fix --nice segfaulting. preload 0.6.3 release ===================== - Proof that I'm an idiot. - Make state parsing work again. preload 0.6.2 release ===================== - Correctly fix the previous fork craziness issue. Real cause of the bug revealed to me by Kai Krakow. - Do O_NOATIME when readahead'ing. preload 0.6.1 release ===================== - Fix bug where preload was spawning thousands of processes. I have not fully understood how that happened, but the fix is right. Still investigating. - Revert a previous change: Start daemon on runlevels 2345 by default. preload 0.6 release =================== - Implement various sorting strategies, defaulting to sort based on disk block. Note that there was a bug in previous releases, causing no sorting to happen at all. Not even on file path. The added config key is called system.sortstrategy. - Implement parallel readahead. A new config key system.maxprocs controls that. Defaults to 30 processes. - Implement readahead request merging. - Change default memory settings to be much more conservative: consume 50% of free mem minus 10% of total, and none of the cached. - Support running under ionice, from the init script. Defaults to idle I/O priority and can be set in the sysconfig config script. This may be moved to the daemon itself. - Other small fixes to prepheral files, mostly picked from Fedora and Ubuntu, including plugging an fd leak. Thanks to everyone who sent me patches. Also thanks to Ubuntu and Fedora packagers. This release should incorporate all their changes either directly or with my own implementation. preload 0.4 release =================== * Improved build system. * state file moved from /var/preload to /var/lib/preload to follow FHS. * LSB INIT INFO block added to the preload.init template. * A crasher with access control lists not matching a file fixed. * Fix crasher on 64-bit systems. preload 0.2 release =================== This is the first public release of preload. It runs as a daemon and monitors processes through /proc and predicts applications that may run and prefetches binaries and shared object. In my experience, it reduced the startup time of OpenOffice.org writer right after a reboot from 13 seconds to 7 seconds, and Firefox from 9 to 7. It also decreased the time from entering login/password information in gdm to a usable dekstop is loaded from 37s to 32s. 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This file is free documentation; the Free Software Foundation gives unlimited permission to copy, distribute and modify it. Basic Installation ================== Briefly, the shell commands `./configure; make; make install' should configure, build, and install this package. The following more-detailed instructions are generic; see the `README' file for instructions specific to this package. The `configure' shell script attempts to guess correct values for various system-dependent variables used during compilation. It uses those values to create a `Makefile' in each directory of the package. It may also create one or more `.h' files containing system-dependent definitions. Finally, it creates a shell script `config.status' that you can run in the future to recreate the current configuration, and a file `config.log' containing compiler output (useful mainly for debugging `configure'). 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If you are _building_ compiler tools for cross-compiling, you should use the option `--target=TYPE' to select the type of system they will produce code for. If you want to _use_ a cross compiler, that generates code for a platform different from the build platform, you should specify the "host" platform (i.e., that on which the generated programs will eventually be run) with `--host=TYPE'. Sharing Defaults ================ If you want to set default values for `configure' scripts to share, you can create a site shell script called `config.site' that gives default values for variables like `CC', `cache_file', and `prefix'. `configure' looks for `PREFIX/share/config.site' if it exists, then `PREFIX/etc/config.site' if it exists. Or, you can set the `CONFIG_SITE' environment variable to the location of the site script. A warning: not all `configure' scripts look for a site script. 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Until the bug is fixed you can use this workaround: CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash `configure' Invocation ====================== `configure' recognizes the following options to control how it operates. `--help' `-h' Print a summary of all of the options to `configure', and exit. `--help=short' `--help=recursive' Print a summary of the options unique to this package's `configure', and exit. The `short' variant lists options used only in the top level, while the `recursive' variant lists options also present in any nested packages. `--version' `-V' Print the version of Autoconf used to generate the `configure' script, and exit. `--cache-file=FILE' Enable the cache: use and save the results of the tests in FILE, traditionally `config.cache'. FILE defaults to `/dev/null' to disable caching. `--config-cache' `-C' Alias for `--cache-file=config.cache'. `--quiet' `--silent' `-q' Do not print messages saying which checks are being made. To suppress all normal output, redirect it to `/dev/null' (any error messages will still be shown). `--srcdir=DIR' Look for the package's source code in directory DIR. Usually `configure' can determine that directory automatically. `--prefix=DIR' Use DIR as the installation prefix. *Note Installation Names:: for more details, including other options available for fine-tuning the installation locations. `--no-create' `-n' Run the configure checks, but stop before creating any output files. `configure' also accepts some other, not widely useful, options. Run `configure --help' for more details. preload-0.6.4/README0000664000076400007640000001055411077747205011001 00000000000000preload ======= preload is an adaptive readahead daemon that prefetches files mapped by applications from the disk to reduce application startup time. preload should run on any recent Linux system with /proc pseudo-filesystem mounted. preload runs as a daemon and gathers information about processes running on the system and shared-objects that they use. This information is saved in a file to keep across runs of preload. preload is developed at http://preload.sf.net/ Feel free to file bugs, or join the mailing list. VERSION ======= The version number of preload consists of two components, major and minor. An even minor components means that this a production release of preload, while odd minor components are alpha releases for testing. The major component contains the format of the state file that preload saves on disk. Upgrades of preload to a higher version with the same major number means that the saved state will be used by the new version, while if the major number has been increased, the data in the old state file is unusable and will be overridden by the new preload. The only effect of which is that the context information gathered so far is lost and all started from the beginning. See the file named NEWS for major changes between releases. INSTALLATION ============ preload is built and installed using the common ./configure; make; make install See the file named INSTALL for more details on how to control the directories that vairous files are installed. If checked out from CVS, running ./bootstrap is needed before configuring. To build an RPM package using the distributed spec file, run make rpm. RUNNING ======= The easiest way to run preload is by using the provided initscript. If you use the RPM package, you should be fine, otherwise you may need to manually add the service and enable it, by running commands like: /sbin/chkconfig --add preload Let preload run for a couple of boots before expecting it to predict that much. Technically, you need to run any application at least two times before preload starts predicting it. TROUBLESHOOTING =============== If you have any problems with getting preload work, try running it from the command-line. See `man preload' for available options. Increase the verbosity and check out the log file. If anything seems to be wrong with preload, do not hesitate to let us know on the mailing list or through the bug reporting system. FILES ===== preload uses the common GNU tools for building and installation, and conforms to the standards of Fedora Core for distribution-specific practices. The following list summarizes files that will be installed and used by preload in a typical installation, thorough building an RPM from the shipped spec file for example: * /usr/sbin/preload: The daemon. It forks and runs in background, but that behavior as well as files to use can be configured through command-line arguments. * /usr/share/man/man8/preload.8: Manual page for the daemon. * /etc/preload.conf: The configuration file for the daemon. The syntax is simple key-file syntax. The default configuration file contains all valid keys, their description, valid and default values. A configuration file reload can be requested using signals; see the manual for details. The config file used can be changed using command-line options. * /var/log/preload: The default log file for the daemon. The log file used can be changed using command-line options. * /etc/logrotate.d/preload: logrotate(8) configuration file for the preload log file. * /var/lib/preload/preload.state: The database of information gathered by preload. This is read during daemon startup and written during daemon shutdown and at a repeating rate that is specified in the daemon configuration file. A state save can be requested using signals; see the manual for details. The state file used can be changed using command-line options. * /etc/rc.d/init.d/preload: SysV-style init-script for launching the daemon. * /etc/sysconfig/preload: Configuration file for the init-script launcher. Contains parameters that decide whether preload should be launched, based on the current system configuration (available memory, etc), and command-line arguments that should be passed to the daemon. ================================================================================ 1 September 2005 Behdad Esfahbod http://behdad.org/ preload-0.6.4/bootstrap0000775000076400007640000001201311077747204012053 00000000000000#! /bin/sh ############################################################################## # $Id: bootstrap,v 1.1.1.1 2005-08-20 08:16:47 behdad Exp $ # $Author: behdad # $Date: 2005-08-20 08:16:47 $ # $Revision: 1.1.1.1 $ # $Source: /home/behdad/sf-bak/preload-cvsbackup/preload/bootstrap,v $ ############################################################################## # -*- Bootstrap -*- # Run this file to produce a configure script. DEFAULT_BOOTSTRAPFLAGS="--force --install --autoreconf=auto" DEFAULT_CONFIGUREFLAGS="--enable-maintainer-mode --enable-compile-warnings" OLDDIR=`pwd` # move to source dir DIR=`echo $0 | sed 's,[^/]*$,,'` test -n "$DIR" && cd "$DIR" if test "$1" = --write-configure; then test -f configure && \ ((echo '#! /bin/sh DIR=`echo $0 | sed "s,[^/]*\$,,"` exec ${DIR}bootstrap --configure -- "$@"' > configure \ && chmod a+x configure) || \ echo Failed writing to configure >&2) exit $? fi # check if we are invoked as configure, or bootstrap BASE=`echo $0 | sed 's,.*/,,'` if test "$BASE" = "configure"; then CONFIG=--config EXTRA_CONFIGUREFLAGS=$@ else # bootstrap EXTRA_BOOTSTRAPFLAGS=$* fi for arg in $DEFAULT_BOOTSTRAPFLAGS $BOOTSTRAPFLAGS $EXTRA_BOOTSTRAPFLAGS do if test -n "$DASHDASHFLAGS"; then DASHDASHFLAGS="$DASHDASHFLAGS $arg" else case $arg in -h|--h|--he|--hel|--help) HELP=--help ;; -V|--vers|--versi|--versio|--version) VERSION=--version ;; -v|--verb|--verbo|--verbos|--verbose) VERBOSE=--verbose ;; -d|--de|--deb|--debu|--debug) DEBUG=--debug ;; -W|--w|--wa|--war|--warn|--warni|--warnin|--warning|--warnings|--warnings=yes|--warnings=all) WARNS=--warnings=all ;; --no-w|--no-wa|--no-war|--no-warn|--no-warni|--no-warnin|--no-warning|--no-warnings|--warn=no|--warning=no|--warnings=no) WARNS=--warnings=none ;; --w=*|--wa=*|--war=*|--warn=*|--warni=*|--warnin=*|--warning=*|--warnings=*) WARNS=$arg ;; -f|--f|--fo|--for|--forc|--force|--forced|--force=yes|--force-missing) FORCE=--force ;; --no-f|--no-fo|--no-for|--no-forc|--no-force|--no-forced|--force=no) FORCE=--no-force ;; -i|--i|--in|--ins|--inst|--insta|--instal|--install|--install=yes|-a|--add-missing) INSTALL=--install ;; --no-i|--no-in|--no-ins|--no-inst|--no-insta|--no-instal|--no-install|--install=no) INSTALL= ;; -s|--s|--sy|--sym|--syml|--symli|--symlin|--symlink|--symlink=yes|--no-copy|--copy=no) SYMLINK=--symlink ;; --no-s|--no-sy|--no-sym|--no-syml|--no-symli|--no-symlin|--no-symlink|--symlink=no|--copy|--copy=yes) SYMLINK= ;; -m|--m|--ma|--mak|--make|--make=yes) MAKE=--make CONFIG=--configure ;; --no-m|--no-ma|--no-mak|--no-make|--make=no) MAKE= ;; -c|--c|--co|--con|--conf|--confi|--config|--configu|--configur|--configure|--configure=yes) CONFIG=--configure ;; --no-c|--no-co|--no-con|--no-conf|--no-confi|--no-config|--no-configu|--no-configur|--no-configure|--configure=no) CONFIG= ;; -n|--dr|--dry|--dry-|--dry-r|--dry-ru|--dry-run) DRYRUN=echo ;; --auto|--autoreconf=auto) AUTORECONF=auto ;; --autoreconf|--autoreconf=yes) AUTORECONF=yes ;; --no-autoreconf|--autoreconf=no) AUTORECONF= ;; --) DASHDASHFLAGS=" " ;; *) echo Ignoring unknown parameter $arg esac fi done test -z "$SYMLINK" && COPY=--copy test -n "$INSTALL" && ADDMISSING=--add-missing # use autoreconf if possible, just check for version 2+ if test "$AUTORECONF" = auto; then case `autoreconf --version 2>/dev/null` in *"autoreconf (GNU Autoconf) 2."* ) echo Usable autoreconf found, running ;; *) AUTORECONF= ;; esac fi if test -n "$AUTORECONF"; then $DRYRUN autoreconf $HELP $VERSION $VERBOSE $DEBUG $FORCE $INSTALL $SYMLINK $MAKE $WARNS $AUTORECONFFLAGS || exit $? else # add files 'config.guess', 'config.sub', 'ltconfig', 'ltmain.sh' test -f Makefile.am && MY_LIBTOOLIZEFLAGS=--automake if grep -q '^ *AC_PROG_LIBTOOL' configure.ac configure.in 2>/dev/null; then $DRYRUN libtoolize $HELP $VERSION $COPY $DEBUG $FORCE $MY_LIBTOOLIZEFLAGS $LIBTOOLIZEFLAGS || exit $? fi # generate 'aclocal.m4' if test -f configure.ac -o configure.in; then $DRYRUN aclocal $HELP $VERSION $VERBOSE $FORCE $ACLOCALFLAGS || exit $? fi # generate 'config.h.in' if test -f configure.ac -o configure.in; then $DRYRUN autoheader $HELP $VERSION $VERBOSE $DEBUG $FORCE $WARNS $AUTOHEADERFLAGS || exit $? fi # generate Makefile.in's from Makefile.am's if test -f Makefile.am; then $DRYRUN automake $HELP $VERSION $VERBOSE $ADDMISSING $COPY $FORCE $WARNS $AUTOMAKEFLAGS || exit $? fi # generate configure from configure.ac if test -f configure.ac -o -f configure.in; then $DRYRUN autoconf $HELP $VERSION $VERBOSE $DEBUG $FORCE $WARNS $AUTOCONFFLAGS || exit $? fi fi # !AUTOCONF # move to build dir cd $OLDDIR # configure if test -n "$CONFIG"; then if test -f ${DIR}configure; then $DRYRUN ${DIR}configure $HELP $VERSION $DEFAULT_CONFIGUREFLAGS $CONFIGUREFLAGS $DASHDASHFLAGS $EXTRA_CONFIGUREFLAGS || exit $? fi fi # make if test -n "$MAKE"; then if test -f Makefile; then $DRYRUN make $MAKEFLAGS || exit $? fi fi preload-0.6.4/TODO0000664000076400007640000000104411077747205010603 00000000000000* Use madvise(2) as a fallback for readahead(2) * Investigate whether readahead is an advice or command * Investigate whether madvise can be used to evacuate pages not needed anymore * Update model when exe or maps are deleted with no replacement * Add the proposal and docs * Make time tracking more realistic: track real time, and take care of hibernation too. * Use Active and Inactive info from /proc/meminfo * Figure out difference between buffers and cache. buffers are not to be written back to disk. can use a good percentage of them. preload-0.6.4/AUTHORS0000664000076400007640000000003011077747204011154 00000000000000behdad: Behdad Esfahbod preload-0.6.4/missing0000755000076400007640000002557711170774421011523 00000000000000#! /bin/sh # Common stub for a few missing GNU programs while installing. scriptversion=2006-05-10.23 # Copyright (C) 1996, 1997, 1999, 2000, 2002, 2003, 2004, 2005, 2006 # Free Software Foundation, Inc. # Originally by Fran,cois Pinard , 1996. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301, USA. # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under # the same distribution terms that you use for the rest of that program. # Originally written by Alexandre Oliva . case $1 in '') echo "$0: No command. Try \`$0 --help' for more information." 1>&2 exit 1; ;; -h | --h*) cat <<\EOF Usage: depcomp [--help] [--version] PROGRAM [ARGS] Run PROGRAMS ARGS to compile a file, generating dependencies as side-effects. Environment variables: depmode Dependency tracking mode. source Source file read by `PROGRAMS ARGS'. object Object file output by `PROGRAMS ARGS'. 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Creating logrotate and init-script, etc EXTRA_DIST += preload.logrotate.in preload.init.in preload.sysconfig initd_SCRIPTS = preload.init AM_INSTALLCHECK_STD_OPTIONS_EXEMPT = $(initd_SCRIPTS) sysconfig_DATA = preload.sysconfig logrotate_DATA = preload.logrotate log_DATA = preload.log pkglocalstate_DATA = preload.state CLEANFILES += preload.init preload.logrotate preload.state preload.log do_subst = sed \ -e 's,@datadir\@,$(pkgdatadir),g' \ -e 's,@sbindir\@,$(sbindir),g' \ -e 's,@initddir\@,$(initddir),g' \ -e 's,@sysconfigdir\@,$(sysconfigdir),g' \ -e 's,@logrotatedir\@,$(logrotatedir),g' \ -e 's,@logdir\@,$(logdir),g' \ -e 's,@subsysdir\@,$(subsysdir),g' \ -e 's,@PACKAGE_NAME\@,$(PACKAGE_NAME),g' \ -e 's,@PACKAGE_SUMMARY\@,$(PACKAGE_SUMMARY),g' \ -e 's,@PACKAGE\@,$(PACKAGE),g' \ -e 's,@VERSION\@,$(VERSION),g' preload.init: preload.init.in Makefile $(do_subst) $(srcdir)/$< > $@ chmod +x $@ preload.logrotate: preload.logrotate.in Makefile $(do_subst) $(srcdir)/$< > $@ preload.state preload.log: touch $@ install-data-hook: @cd "$(DESTDIR)$(initddir)" && mv -f preload.init preload @cd "$(DESTDIR)$(logrotatedir)" && mv -f preload.logrotate preload @cd "$(DESTDIR)$(sysconfigdir)" && mv -f preload.sysconfig preload uninstall-hook: $(RM) "$(DESTDIR)$(initddir)/preload" $(RM) "$(DESTDIR)$(logrotatedir)/preload" $(RM) "$(DESTDIR)$(sysconfigdir)/preload" # Some custom targets to make it easier to release things. # Use either: # make distcheck # or make release-publish tar_file = $(distdir).tar.gz sha1_file = $(tar_file).sha1 gpg_file = $(sha1_file).asc $(sha1_file): $(tar_file) sha1sum $^ > $@ $(gpg_file): $(sha1_file) @echo "Please enter your GPG password to sign the checksum." gpg --armor --sign $^ release-publish: distcheck $(tar_file) $(sha1_file) $(gpg_file) @echo "" @echo "Please send an announcement to $(MAILING_LIST)" @echo "including the following:" @echo "" @echo "Subject: $(PACKAGE) release $(VERSION) now available" @echo "" @echo "============================== CUT HERE ==============================" @echo "A new $(PACKAGE) release $(VERSION) is now available from:" @echo "" @echo " $(DOWNLOAD_URL_BASE)/$(tar_file)" @echo "" @echo " which can be verified with:" @echo "" @echo " $(DOWNLOAD_URL_BASE)/$(sha1_file)" @echo -n " " @cat $(sha1_file) @echo "" @echo " $(DOWNLOAD_URL_BASE)/$(gpg_file)" @echo " (signed by `getent passwd "$$USER" | cut -d: -f 5 | cut -d, -f 1`)" @echo "" @echo "You can access these from:" @echo "" @echo " $(SITE_URL)" @echo "============================== CUT HERE ==============================" @echo "" @echo "Also, please include the new entries from the NEWS file." @echo "Needless to say, upload the four files to the project" @echo "download server and push the NEWS entries to the news" @echo "section of the site." .PHONY: release-verify-even-micro release-check release-publish preload-0.6.4/preload.init.in0000775000076400007640000000377211077747204013047 00000000000000#!/bin/bash # # @initddir@/@PACKAGE@ # # Starts the @PACKAGE@ daemon # # chkconfig: 2345 05 95 # description: @PACKAGE_SUMMARY@ # processname: @PACKAGE@ # ### BEGIN INIT INFO # Provides: preload.sourceforge.net # Required-Start: $local_fs $remote_fs $time # Required-Stop: $local_fs $remote_fs $time # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: @PACKAGE_SUMMARY@ # Description: Analyzes what applications users run and tries to predict # what they would like to run and loads them into memory # beforehand. ### END INIT INFO # Source function library. . /etc/rc.d/init.d/functions [ -x @sbindir@/@PACKAGE@ ] || exit 0 if [ -f @sysconfigdir@/@PACKAGE@ ]; then . @sysconfigdir@/@PACKAGE@ fi # Check for > MIN_MEMORY MB MIN_MEMORY=${MIN_MEMORY:-256} free -m | awk '/Mem:/ {exit ($2 >= ('"$MIN_MEMORY"'))?0:1}' || exit 0 # Check for ionice and use idle scheduling if available RUNAS="" IONICE="/usr/bin/ionice" if [ -n "$IONICE_OPTS" ]; then if [ -x "$IONICE" ]; then RUNAS="$IONICE $IONICE_OPTS" else echo "ionice not found, running with normal io priority" >&2 fi fi RETVAL=0 # # See how we were called. # start() { # Check if it is already running if [ ! -f @subsysdir@/@PACKAGE@ ]; then echo -n $"Starting @PACKAGE@ daemon: " daemon $RUNAS @sbindir@/@PACKAGE@ $PRELOAD_OPTS RETVAL=$? 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IN NO EVENT SHALL THE # X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN # AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC- # TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # # Except as contained in this notice, the name of the X Consortium shall not # be used in advertising or otherwise to promote the sale, use or other deal- # ings in this Software without prior written authorization from the X Consor- # tium. # # # FSF changes to this file are in the public domain. # # Calling this script install-sh is preferred over install.sh, to prevent # `make' implicit rules from creating a file called install from it # when there is no Makefile. # # This script is compatible with the BSD install script, but was written # from scratch. nl=' ' IFS=" "" $nl" # set DOITPROG to echo to test this script # Don't use :- since 4.3BSD and earlier shells don't like it. doit=${DOITPROG-} if test -z "$doit"; then doit_exec=exec else doit_exec=$doit fi # Put in absolute file names if you don't have them in your path; # or use environment vars. chgrpprog=${CHGRPPROG-chgrp} chmodprog=${CHMODPROG-chmod} chownprog=${CHOWNPROG-chown} cmpprog=${CMPPROG-cmp} cpprog=${CPPROG-cp} mkdirprog=${MKDIRPROG-mkdir} mvprog=${MVPROG-mv} rmprog=${RMPROG-rm} stripprog=${STRIPPROG-strip} posix_glob='?' initialize_posix_glob=' test "$posix_glob" != "?" || { if (set -f) 2>/dev/null; then posix_glob= else posix_glob=: fi } ' posix_mkdir= # Desired mode of installed file. mode=0755 chgrpcmd= chmodcmd=$chmodprog chowncmd= mvcmd=$mvprog rmcmd="$rmprog -f" stripcmd= src= dst= dir_arg= dst_arg= copy_on_change=false no_target_directory= usage="\ Usage: $0 [OPTION]... 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