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Added a new network model option, LegrandVelho, based on recent evaluation studies.
[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
129 s_surf_model_description_t surf_network_model_description[] = {
130   {"Constant", NULL, surf_network_model_init_Constant},
131   {"CM02", NULL, surf_network_model_init_CM02},
132   {"LegrandVelho", NULL, surf_network_model_init_LegrandVelho},
133 #ifdef HAVE_GTNETS
134   {"GTNets", NULL, surf_network_model_init_GTNETS},
135 #endif
136 #ifdef HAVE_SDP
137   {"SDP", NULL, surf_network_model_init_SDP},
138 #endif
139   {"Reno", NULL, surf_network_model_init_Reno},
140   {"Reno2", NULL, surf_network_model_init_Reno2},
141   {"Vegas", NULL, surf_network_model_init_Vegas},
142   { NULL,NULL,NULL} /* this array must be NULL terminated */
143 };
144
145 s_surf_model_description_t surf_cpu_model_description[] = {
146   {"Cas01", NULL, surf_cpu_model_init_Cas01},
147   { NULL,NULL,NULL} /* this array must be NULL terminated */
148 };
149
150 s_surf_model_description_t surf_workstation_model_description[] = {
151   {"CLM03", NULL, surf_workstation_model_init_CLM03, create_workstations},
152   {"compound", NULL, surf_workstation_model_init_compound, create_workstations},
153   {"ptask_L07", NULL, surf_workstation_model_init_ptask_L07, NULL},
154   { NULL,NULL,NULL} /* this array must be NULL terminated */
155 };
156
157 void update_model_description(s_surf_model_description_t * table,
158                               const char *name,
159                               surf_model_t model)
160 {
161   int i = find_model_description(table, name);
162   table[i].model = model;
163 }
164
165 int find_model_description(s_surf_model_description_t * table,
166                            const char *name)
167 {
168   int i;
169   char *name_list = NULL;
170
171   for (i = 0; table[i].name; i++)
172     if (!strcmp(name, table[i].name)) {
173       return i;
174     }
175   name_list = strdup(table[0].name);
176   for (i = 1; table[i].name; i++) {
177     name_list =
178         xbt_realloc(name_list,
179                     strlen(name_list) + strlen(table[i].name) + 2);
180     strcat(name_list, ", ");
181     strcat(name_list, table[i].name);
182   }
183   xbt_assert2(0, "Model '%s' is invalid! Valid models are: %s.", name,
184               name_list);
185 }
186
187 double generic_maxmin_share_resources(xbt_swag_t running_actions,
188                                       size_t offset,
189                                       lmm_system_t sys,
190                                       void (*solve) (lmm_system_t))
191 {
192   surf_action_t action = NULL;
193   double min = -1;
194   double value = -1;
195 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + (offset))))
196
197   xbt_assert0(solve, "Give me a real solver function!");
198   solve(sys);
199
200   xbt_swag_foreach(action, running_actions) {
201     value = lmm_variable_getvalue(VARIABLE(action));
202     if ((value > 0) || (action->max_duration >= 0))
203       break;
204   }
205
206   if (!action)
207     return -1.0;
208
209   if (value > 0) {
210     if(action->remains>0) 
211       min = action->remains / value;
212     else 
213       min = 0.0;
214     if ((action->max_duration >= 0) && (action->max_duration < min))
215       min = action->max_duration;
216   } else
217     min = action->max_duration;
218
219
220   for (action = xbt_swag_getNext(action, running_actions->offset);
221        action;
222        action = xbt_swag_getNext(action, running_actions->offset)) {
223     value = lmm_variable_getvalue(VARIABLE(action));
224     if (value > 0) {
225       if(action->remains>0) 
226         value = action->remains / value;
227       else 
228         value = 0.0;
229       if (value < min) {
230         min = value;
231         DEBUG2("Updating min (value) with %p: %f", action, min);
232       }
233     }
234     if ((action->max_duration >= 0) && (action->max_duration < min)) {
235       min = action->max_duration;
236       DEBUG2("Updating min (duration) with %p: %f", action, min);
237     }
238   }
239   DEBUG1("min value : %f", min);
240
241 #undef VARIABLE
242   return min;
243 }
244
245 e_surf_action_state_t surf_action_get_state(surf_action_t action)
246 {
247   surf_action_state_t action_state =
248       &(action->model_type->common_public->states);
249
250   if (action->state_set == action_state->ready_action_set)
251     return SURF_ACTION_READY;
252   if (action->state_set == action_state->running_action_set)
253     return SURF_ACTION_RUNNING;
254   if (action->state_set == action_state->failed_action_set)
255     return SURF_ACTION_FAILED;
256   if (action->state_set == action_state->done_action_set)
257     return SURF_ACTION_DONE;
258   return SURF_ACTION_NOT_IN_THE_SYSTEM;
259 }
260
261 double surf_action_get_start_time(surf_action_t action)
262 {
263   return action->start;
264 }
265
266 double surf_action_get_finish_time(surf_action_t action)
267 {
268   return action->finish;
269 }
270
271 void surf_action_free(surf_action_t * action)
272 {
273   (*action)->model_type->common_public->action_cancel(*action);
274   free(*action);
275   *action = NULL;
276 }
277
278 void surf_action_change_state(surf_action_t action,
279                               e_surf_action_state_t state)
280 {
281   surf_action_state_t action_state =
282       &(action->model_type->common_public->states);
283   XBT_IN2("(%p,%s)", action, surf_action_state_names[state]);
284   xbt_swag_remove(action, action->state_set);
285
286   if (state == SURF_ACTION_READY)
287     action->state_set = action_state->ready_action_set;
288   else if (state == SURF_ACTION_RUNNING)
289     action->state_set = action_state->running_action_set;
290   else if (state == SURF_ACTION_FAILED)
291     action->state_set = action_state->failed_action_set;
292   else if (state == SURF_ACTION_DONE)
293     action->state_set = action_state->done_action_set;
294   else
295     action->state_set = NULL;
296
297   if (action->state_set)
298     xbt_swag_insert(action, action->state_set);
299   XBT_OUT;
300 }
301
302 void surf_action_set_data(surf_action_t action, void *data)
303 {
304   action->data = data;
305 }
306
307 XBT_LOG_EXTERNAL_CATEGORY(surf_cpu);
308 XBT_LOG_EXTERNAL_CATEGORY(surf_kernel);
309 XBT_LOG_EXTERNAL_CATEGORY(surf_lagrange);
310 XBT_LOG_EXTERNAL_CATEGORY(surf_lagrange_dichotomy);
311 XBT_LOG_EXTERNAL_CATEGORY(surf_maxmin);
312 XBT_LOG_EXTERNAL_CATEGORY(surf_network);
313 XBT_LOG_EXTERNAL_CATEGORY(surf_parse);
314 XBT_LOG_EXTERNAL_CATEGORY(surf_timer);
315 XBT_LOG_EXTERNAL_CATEGORY(surf_workstation);
316
317 #ifdef HAVE_SDP
318   XBT_LOG_EXTERNAL_CATEGORY(surf_sdp_out);
319   XBT_LOG_EXTERNAL_CATEGORY(surf_sdp);
320 #endif
321 #ifdef HAVE_GTNETS
322   XBT_LOG_EXTERNAL_CATEGORY(surf_network_gtnets);
323 #endif
324
325 void surf_init(int *argc, char **argv)
326 {
327   int i, j;
328   char *opt;
329
330   const char *initial_path;
331
332   /* Connect our log channels: that must be done manually under windows */
333   XBT_LOG_CONNECT(surf_cpu, surf);
334   XBT_LOG_CONNECT(surf_kernel, surf);
335   XBT_LOG_CONNECT(surf_lagrange, surf);
336     XBT_LOG_CONNECT(surf_lagrange_dichotomy, surf_lagrange);
337   XBT_LOG_CONNECT(surf_maxmin, surf);
338   XBT_LOG_CONNECT(surf_network, surf);
339   XBT_LOG_CONNECT(surf_parse, surf);
340   XBT_LOG_CONNECT(surf_timer, surf);
341   XBT_LOG_CONNECT(surf_workstation, surf);
342
343 #ifdef HAVE_SDP
344   XBT_LOG_CONNECT(surf_sdp_out, surf);
345   XBT_LOG_CONNECT(surf_sdp, surf);
346 #endif
347 #ifdef HAVE_GTNETS
348   XBT_LOG_CONNECT(surf_network_gtnets, surf);
349 #endif
350    
351   xbt_init(argc, argv);
352   if (!surf_path) {
353
354     /* retrieves the current directory of the current process */
355     initial_path = __surf_get_initial_path();
356
357     xbt_assert0((initial_path),
358                 "__surf_get_initial_path() failed! Can't resolves current Windows directory");
359
360     surf_path = xbt_dynar_new(sizeof(char *), NULL);
361     xbt_dynar_push(surf_path, &initial_path);
362
363     for (i = 1; i < *argc; i++) {
364       if (!strncmp(argv[i], "--surf-path=", strlen("--surf-path="))) {
365         opt = strchr(argv[i], '=');
366         opt++;
367         xbt_dynar_push(surf_path, &opt);
368         /*remove this from argv */
369         for (j = i + 1; j < *argc; j++) {
370           argv[j - 1] = argv[j];
371         }
372         argv[j - 1] = NULL;
373         (*argc)--;
374         i--;                    /* compensate effect of next loop incrementation */
375       }
376     }
377   }
378   if (!model_list)
379     model_list = xbt_dynar_new(sizeof(surf_model_private_t), NULL);
380   if (!history)
381     history = tmgr_history_new();
382 }
383
384 static char *path_name = NULL;
385 FILE *surf_fopen(const char *name, const char *mode)
386 {
387   unsigned int iter;
388   char *path = NULL;
389   FILE *file = NULL;
390   unsigned int path_name_len = 0;       /* don't count '\0' */
391
392   xbt_assert0(name, "Need a non-NULL file name");
393
394   xbt_assert0(surf_path,
395               "surf_init has to be called before using surf_fopen");
396
397   if (__surf_is_absolute_file_path(name)) {     /* don't mess with absolute file names */
398     return fopen(name, mode);
399
400   } else {                      /* search relative files in the path */
401
402     if (!path_name) {
403       path_name_len = strlen(name);
404       path_name = xbt_new0(char, path_name_len + 1);
405     }
406
407     xbt_dynar_foreach(surf_path, iter, path) {
408       if (path_name_len < strlen(path) + strlen(name) + 1) {
409         path_name_len = strlen(path) + strlen(name) + 1;        /* plus '/' */
410         path_name = xbt_realloc(path_name, path_name_len + 1);
411       }
412       #ifdef WIN32
413       sprintf(path_name, "%s\\%s", path, name);
414       #else
415       sprintf(path_name, "%s/%s", path, name);
416       #endif
417       file = fopen(path_name, mode);
418       if (file)
419         return file;
420     }
421   }
422   return file;
423 }
424
425 void surf_exit(void)
426 {
427   unsigned int iter;
428   surf_model_t model = NULL;
429
430   xbt_dynar_foreach(model_list, iter, model) {
431     model->common_private->finalize();
432   }
433
434   if (maxmin_system) {
435     lmm_system_free(maxmin_system);
436     maxmin_system = NULL;
437   }
438   if (history) {
439     tmgr_history_free(history);
440     history = NULL;
441   }
442   if (model_list)
443     xbt_dynar_free(&model_list);
444
445   if (surf_path)
446     xbt_dynar_free(&surf_path);
447
448   tmgr_finalize();
449   surf_parse_lex_destroy();
450   if (path_name) {
451     free(path_name);
452     path_name = NULL;
453   }
454   surf_parse_free_callbacks();
455   xbt_dict_free(&route_table);
456   NOW=0; /* Just in case the user plans to restart the simulation afterward */
457   xbt_exit();
458 }
459
460 void surf_presolve(void) {
461   double next_event_date = -1.0;
462   tmgr_trace_event_t event = NULL;
463   double value = -1.0;
464   surf_model_object_t model_obj = NULL;
465   surf_model_t model = NULL;
466   unsigned int iter;
467    
468     DEBUG0
469         ("First Run! Let's \"purge\" events and put models in the right state");
470     while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
471       if (next_event_date > NOW)
472         break;
473       while ((event =
474               tmgr_history_get_next_event_leq(history, next_event_date,
475                                               &value,
476                                               (void **) &model_obj))) {
477         model_obj->model->common_private->
478           update_resource_state(model_obj, event, value,NOW);
479       }
480     }
481     xbt_dynar_foreach(model_list, iter, model) {
482       model->common_private->update_actions_state(NOW, 0.0);
483     }
484 }
485
486 double surf_solve(void)
487 {
488   double min = -1.0;
489   double next_event_date = -1.0;
490   double model_next_action_end = -1.0;
491   double value = -1.0;
492   surf_model_object_t model_obj = NULL;
493   surf_model_t model = NULL;
494   tmgr_trace_event_t event = NULL;
495   unsigned int iter;
496
497   min = -1.0;
498
499   DEBUG0("Looking for next action end");
500   xbt_dynar_foreach(model_list, iter, model) {
501     DEBUG1("Running for Resource [%s]", model->common_public->name);
502     model_next_action_end =
503         model->common_private->share_resources(NOW);
504     DEBUG2("Resource [%s] : next action end = %f",
505            model->common_public->name, model_next_action_end);
506     if (((min < 0.0) || (model_next_action_end < min))
507         && (model_next_action_end >= 0.0))
508       min = model_next_action_end;
509   }
510   DEBUG1("Next action end : %f", min);
511
512   if (min < 0.0)
513     return -1.0;
514
515   DEBUG0("Looking for next event");
516   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
517     DEBUG1("Next event : %f", next_event_date);
518     if (next_event_date > NOW + min)
519       break;
520     DEBUG0("Updating models");
521     while ((event =
522             tmgr_history_get_next_event_leq(history, next_event_date,
523                                             &value,
524                                             (void **) &model_obj))) {
525       if (model_obj->model->common_private->
526           resource_used(model_obj)) {
527         min = next_event_date - NOW;
528         DEBUG1
529             ("This event will modify model state. Next event set to %f",
530              min);
531       }
532       /* update state of model_obj according to new value. Does not touch lmm.
533          It will be modified if needed when updating actions */
534       model_obj->model->common_private->
535         update_resource_state(model_obj, event, value,NOW+min);
536     }
537   }
538
539   DEBUG1("Duration set to %f", min);
540
541   NOW = NOW + min;
542
543   xbt_dynar_foreach(model_list, iter, model) {
544     model->common_private->update_actions_state(NOW, min);
545   }
546
547   return min;
548 }
549
550 double surf_get_clock(void)
551 {
552   return NOW;
553 }