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remove global maxmin system. Every model should use its own. It's cleaner and faster!!!
[simgrid.git] / src / surf / surf.c
1 /*      $Id$     */
2
3 /* Copyright (c) 2004 Arnaud Legrand. All rights reserved.                  */
4
5 /* This program is free software; you can redistribute it and/or modify it
6  * under the terms of the license (GNU LGPL) which comes with this package. */
7
8 #include <ctype.h>
9
10 #include "surf_private.h"
11 #include "xbt/module.h"
12
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_kernel, surf,
14                                 "Logging specific to SURF (kernel)");
15
16 int use_sdp_solver = 0;
17 int use_lagrange_solver = 0;
18
19 /* Additional declarations for Windows potability. */
20
21 #ifndef MAX_DRIVE
22 #define MAX_DRIVE 26
23 #endif
24
25 #ifdef _WIN32
26 #include <windows.h>
27 static const char *disk_drives_letter_table[MAX_DRIVE] = {
28   "A:\\",
29   "B:\\",
30   "C:\\",
31   "D:\\",
32   "E:\\",
33   "F:\\",
34   "G:\\",
35   "H:\\",
36   "I:\\",
37   "J:\\",
38   "K:\\",
39   "L:\\",
40   "M:\\",
41   "N:\\",
42   "O:\\",
43   "P:\\",
44   "Q:\\",
45   "R:\\",
46   "S:\\",
47   "T:\\",
48   "U:\\",
49   "V:\\",
50   "W:\\",
51   "X:\\",
52   "Y:\\",
53   "Z:\\"
54 };
55 #endif                          /* #ifdef _WIN32 */
56
57 /*
58  * Returns the initial path. On Windows the initial path is
59  * the current directory for the current process in the other
60  * case the function returns "./" that represents the current
61  * directory on Unix/Linux platforms.
62  */
63
64 const char *__surf_get_initial_path(void)
65 {
66
67 #ifdef _WIN32
68   unsigned i;
69   char current_directory[MAX_PATH + 1] = { 0 };
70   unsigned int len = GetCurrentDirectory(MAX_PATH + 1, current_directory);
71   char root[4] = { 0 };
72
73   if (!len)
74     return NULL;
75
76   strncpy(root, current_directory, 3);
77
78   for (i = 0; i < MAX_DRIVE; i++) {
79     if (toupper(root[0]) == disk_drives_letter_table[i][0])
80       return disk_drives_letter_table[i];
81   }
82
83   return NULL;
84 #else
85   return "./";
86 #endif
87 }
88
89 /* The __surf_is_absolute_file_path() returns 1 if
90  * file_path is a absolute file path, in the other
91  * case the function returns 0.
92  */
93 int __surf_is_absolute_file_path(const char *file_path)
94 {
95 #ifdef _WIN32
96   WIN32_FIND_DATA wfd = { 0 };
97   HANDLE hFile = FindFirstFile(file_path, &wfd);
98
99   if (INVALID_HANDLE_VALUE == hFile)
100     return 0;
101
102   FindClose(hFile);
103   return 1;
104 #else
105   return (file_path[0] == '/');
106 #endif
107 }
108
109 typedef struct surf_model_object {
110   surf_model_t model;
111 } s_surf_model_object_t, *surf_model_object_t;
112
113 static double NOW = 0;
114
115 xbt_dynar_t model_list = NULL;
116 tmgr_history_t history = NULL;
117 lmm_system_t maxmin_system = NULL;
118 xbt_dynar_t surf_path = NULL;
119 const char *surf_action_state_names[6] = {
120   "SURF_ACTION_READY",
121   "SURF_ACTION_RUNNING",
122   "SURF_ACTION_FAILED",
123   "SURF_ACTION_DONE",
124   "SURF_ACTION_TO_FREE",
125   "SURF_ACTION_NOT_IN_THE_SYSTEM"
126 };
127
128 int surf_network_model_description_size = 3
129 #ifdef HAVE_GTNETS
130     + 1
131 #endif
132 #ifdef HAVE_SDP
133     + 1
134 #endif
135     ;
136 s_surf_model_description_t surf_network_model_description[] = {
137   {"CM02", NULL, surf_network_model_init_CM02},
138 #ifdef HAVE_GTNETS
139   {"GTNets", NULL, surf_network_model_init_GTNETS},
140 #endif
141 #ifdef HAVE_SDP
142   {"SDP", NULL, surf_network_model_init_SDP},
143 #endif
144   {"Reno", NULL, surf_network_model_init_Reno},
145   {"Vegas", NULL, surf_network_model_init_Vegas}
146 };
147
148 int surf_cpu_model_description_size = 1;
149 s_surf_model_description_t surf_cpu_model_description[] = {
150   {"Cas01", NULL, surf_cpu_model_init_Cas01},
151 };
152
153 int surf_workstation_model_description_size = 4;
154 s_surf_model_description_t surf_workstation_model_description[] = {
155   {"CLM03", NULL, surf_workstation_model_init_CLM03},
156   {"KCCFLN05", NULL, surf_workstation_model_init_KCCFLN05},
157   {"compound", NULL, surf_workstation_model_init_compound},
158   {"ptask_L07", NULL, surf_workstation_model_init_ptask_L07}
159 };
160
161 void update_model_description(s_surf_model_description_t * table,
162                                  int table_size,
163                                  const char *name,
164                                  surf_model_t model)
165 {
166   int i = find_model_description(table, table_size, name);
167   table[i].model = model;
168 }
169
170 int find_model_description(s_surf_model_description_t * table,
171                               int table_size, const char *name)
172 {
173   int i;
174   char *name_list = NULL;
175
176   for (i = 0; i < table_size; i++)
177     if (!strcmp(name, table[i].name)) {
178       return i;
179     }
180   name_list = strdup(table[0].name);
181   for (i = 1; i < table_size; i++) {
182     name_list =
183         xbt_realloc(name_list,
184                     strlen(name_list) + strlen(table[i].name) + 2);
185     strcat(name_list, ", ");
186     strcat(name_list, table[i].name);
187   }
188   xbt_assert2(0, "Model '%s' is invalid! Valid models are: %s.", name,
189               name_list);
190 }
191
192 double generic_maxmin_share_resources(xbt_swag_t running_actions,
193                                       size_t offset)
194 {
195   return generic_maxmin_share_resources2(running_actions, offset,
196                                          maxmin_system, lmm_solve);
197 }
198
199 double generic_maxmin_share_resources2(xbt_swag_t running_actions,
200                                        size_t offset,
201                                        lmm_system_t sys,
202                                        void (*solve) (lmm_system_t))
203 {
204   surf_action_t action = NULL;
205   double min = -1;
206   double value = -1;
207 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + (offset))))
208
209   xbt_assert0(solve, "Give me a real solver function!");
210   solve(sys);
211
212   xbt_swag_foreach(action, running_actions) {
213     value = lmm_variable_getvalue(VARIABLE(action));
214     if ((value > 0) || (action->max_duration >= 0))
215       break;
216   }
217
218   if (!action)
219     return -1.0;
220
221   if (value > 0) {
222     if(action->remains>0) 
223       min = action->remains / value;
224     else 
225       min = 0.0;
226     if ((action->max_duration >= 0) && (action->max_duration < min))
227       min = action->max_duration;
228   } else
229     min = action->max_duration;
230
231   DEBUG5("Found action (%p: duration = %f, remains = %f, value = %f) ! %f",
232          action, action->max_duration, action->remains, value, min);
233
234   for (action = xbt_swag_getNext(action, running_actions->offset);
235        action;
236        action = xbt_swag_getNext(action, running_actions->offset)) {
237     value = lmm_variable_getvalue(VARIABLE(action));
238     if (value > 0) {
239       if(action->remains>0) 
240         value = action->remains / value;
241       else 
242         value = 0.0;
243       if (value < min) {
244         min = value;
245         DEBUG2("Updating min (value) with %p: %f", action, min);
246       }
247     }
248     if ((action->max_duration >= 0) && (action->max_duration < min)) {
249       min = action->max_duration;
250       DEBUG2("Updating min (duration) with %p: %f", action, min);
251     }
252   }
253   DEBUG1("min value : %f", min);
254
255 #undef VARIABLE
256   return min;
257 }
258
259 e_surf_action_state_t surf_action_get_state(surf_action_t action)
260 {
261   surf_action_state_t action_state =
262       &(action->model_type->common_public->states);
263
264   if (action->state_set == action_state->ready_action_set)
265     return SURF_ACTION_READY;
266   if (action->state_set == action_state->running_action_set)
267     return SURF_ACTION_RUNNING;
268   if (action->state_set == action_state->failed_action_set)
269     return SURF_ACTION_FAILED;
270   if (action->state_set == action_state->done_action_set)
271     return SURF_ACTION_DONE;
272   return SURF_ACTION_NOT_IN_THE_SYSTEM;
273 }
274
275 double surf_action_get_start_time(surf_action_t action)
276 {
277   return action->start;
278 }
279
280 double surf_action_get_finish_time(surf_action_t action)
281 {
282   return action->finish;
283 }
284
285 void surf_action_free(surf_action_t * action)
286 {
287   (*action)->model_type->common_public->action_cancel(*action);
288   free(*action);
289   *action = NULL;
290 }
291
292 void surf_action_change_state(surf_action_t action,
293                               e_surf_action_state_t state)
294 {
295   surf_action_state_t action_state =
296       &(action->model_type->common_public->states);
297   XBT_IN2("(%p,%s)", action, surf_action_state_names[state]);
298   xbt_swag_remove(action, action->state_set);
299
300   if (state == SURF_ACTION_READY)
301     action->state_set = action_state->ready_action_set;
302   else if (state == SURF_ACTION_RUNNING)
303     action->state_set = action_state->running_action_set;
304   else if (state == SURF_ACTION_FAILED)
305     action->state_set = action_state->failed_action_set;
306   else if (state == SURF_ACTION_DONE)
307     action->state_set = action_state->done_action_set;
308   else
309     action->state_set = NULL;
310
311   if (action->state_set)
312     xbt_swag_insert(action, action->state_set);
313   XBT_OUT;
314 }
315
316 void surf_action_set_data(surf_action_t action, void *data)
317 {
318   action->data = data;
319 }
320
321 void surf_init(int *argc, char **argv)
322 {
323   int i, j;
324   char *opt;
325
326   const char *initial_path;
327
328   xbt_init(argc, argv);
329   if (!surf_path) {
330
331     /* retrieves the current directory of the current process */
332     initial_path = __surf_get_initial_path();
333
334     xbt_assert0((initial_path),
335                 "__surf_get_initial_path() failed! Can't resolves current Windows directory");
336
337     surf_path = xbt_dynar_new(sizeof(char *), NULL);
338     xbt_dynar_push(surf_path, &initial_path);
339
340     for (i = 1; i < *argc; i++) {
341       if (!strncmp(argv[i], "--surf-path=", strlen("--surf-path="))) {
342         opt = strchr(argv[i], '=');
343         opt++;
344         xbt_dynar_push(surf_path, &opt);
345         /*remove this from argv */
346         for (j = i + 1; j < *argc; j++) {
347           argv[j - 1] = argv[j];
348         }
349         argv[j - 1] = NULL;
350         (*argc)--;
351         i--;                    /* compensate effect of next loop incrementation */
352       }
353     }
354   }
355   if (!model_list)
356     model_list = xbt_dynar_new(sizeof(surf_model_private_t), NULL);
357   if (!history)
358     history = tmgr_history_new();
359 }
360
361 static char *path_name = NULL;
362 FILE *surf_fopen(const char *name, const char *mode)
363 {
364   int i;
365   char *path = NULL;
366   FILE *file = NULL;
367   int path_name_len = 0;        /* don't count '\0' */
368
369   xbt_assert0(name, "Need a non-NULL file name");
370
371   xbt_assert0(surf_path,
372               "surf_init has to be called before using surf_fopen");
373
374   if (__surf_is_absolute_file_path(name)) {     /* don't mess with absolute file names */
375     return fopen(name, mode);
376
377   } else {                      /* search relative files in the path */
378
379     if (!path_name) {
380       path_name_len = strlen(name);
381       path_name = xbt_new0(char, path_name_len + 1);
382     }
383
384     xbt_dynar_foreach(surf_path, i, path) {
385       if (path_name_len < strlen(path) + strlen(name) + 1) {
386         path_name_len = strlen(path) + strlen(name) + 1;        /* plus '/' */
387         path_name = xbt_realloc(path_name, path_name_len + 1);
388       }
389       sprintf(path_name, "%s/%s", path, name);
390       file = fopen(path_name, mode);
391       if (file)
392         return file;
393     }
394   }
395   return file;
396 }
397
398 void surf_exit(void)
399 {
400   int i;
401   surf_model_t model = NULL;
402
403   xbt_dynar_foreach(model_list, i, model) {
404     model->common_private->finalize();
405   }
406
407   if (maxmin_system) {
408     lmm_system_free(maxmin_system);
409     maxmin_system = NULL;
410   }
411   if (history) {
412     tmgr_history_free(history);
413     history = NULL;
414   }
415   if (model_list)
416     xbt_dynar_free(&model_list);
417
418   if (surf_path)
419     xbt_dynar_free(&surf_path);
420
421   tmgr_finalize();
422   surf_parse_lex_destroy();
423   if (path_name) {
424     free(path_name);
425     path_name = NULL;
426   }
427   xbt_exit();
428 }
429
430 double surf_solve(void)
431 {
432   static int first_run = 1;
433
434   double min = -1.0;
435   double next_event_date = -1.0;
436   double model_next_action_end = -1.0;
437   double value = -1.0;
438   surf_model_object_t model_obj = NULL;
439   surf_model_t model = NULL;
440   tmgr_trace_event_t event = NULL;
441   int i;
442
443   if (first_run) {
444     DEBUG0
445         ("First Run! Let's \"purge\" events and put models in the right state");
446     while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
447       if (next_event_date > NOW)
448         break;
449       while ((event =
450               tmgr_history_get_next_event_leq(history, next_event_date,
451                                               &value,
452                                               (void **) &model_obj))) {
453         model_obj->model->common_private->
454             update_resource_state(model_obj, event, value);
455       }
456     }
457     xbt_dynar_foreach(model_list, i, model) {
458       model->common_private->update_actions_state(NOW, 0.0);
459     }
460     first_run = 0;
461     return 0.0;
462   }
463
464   min = -1.0;
465
466   DEBUG0("Looking for next action end");
467   xbt_dynar_foreach(model_list, i, model) {
468     DEBUG1("Running for Resource [%s]", model->common_public->name);
469     model_next_action_end =
470         model->common_private->share_resources(NOW);
471     DEBUG2("Resource [%s] : next action end = %f",
472            model->common_public->name, model_next_action_end);
473     if (((min < 0.0) || (model_next_action_end < min))
474         && (model_next_action_end >= 0.0))
475       min = model_next_action_end;
476   }
477   DEBUG1("Next action end : %f", min);
478
479   if (min < 0.0)
480     return -1.0;
481
482   DEBUG0("Looking for next event");
483   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
484     DEBUG1("Next event : %f", next_event_date);
485     if (next_event_date > NOW + min)
486       break;
487     DEBUG0("Updating models");
488     while ((event =
489             tmgr_history_get_next_event_leq(history, next_event_date,
490                                             &value,
491                                             (void **) &model_obj))) {
492       if (model_obj->model->common_private->
493           resource_used(model_obj)) {
494         min = next_event_date - NOW;
495         DEBUG1
496             ("This event will modify model state. Next event set to %f",
497              min);
498       }
499       /* update state of model_obj according to new value. Does not touch lmm.
500          It will be modified if needed when updating actions */
501       model_obj->model->common_private->
502           update_resource_state(model_obj, event, value);
503     }
504   }
505
506   DEBUG1("Duration set to %f", min);
507
508   NOW = NOW + min;
509
510   xbt_dynar_foreach(model_list, i, model) {
511     model->common_private->update_actions_state(NOW, min);
512   }
513
514   return min;
515 }
516
517 double surf_get_clock(void)
518 {
519   return NOW;
520 }