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 "surf_private.h"
   9 #include "xbt/module.h"
  10
  11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_global, surf,
  12                                 "Logging specific to the SURF global module");
  13
  14
  15 static double NOW = 0;
  16
  17 xbt_dynar_t resource_list = NULL;
  18 tmgr_history_t history = NULL;
  19 lmm_system_t maxmin_system = NULL;
  20 xbt_dynar_t surf_path = NULL;
  21
  22 double generic_maxmin_share_resources(xbt_swag_t running_actions,
  23                                        size_t offset)
  24 {
  25   return  generic_maxmin_share_resources2(running_actions, offset,
  26                                           maxmin_system);
  27 }
  28
  29 double generic_maxmin_share_resources2(xbt_swag_t running_actions,
  30                                        size_t offset,
  31                                        lmm_system_t sys)
  32 {
  33   surf_action_t action = NULL;
  34   double min = -1;
  35   double value = -1;
  36 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + (offset))))
  37
  38   lmm_solve(sys);
  39
  40   xbt_swag_foreach(action, running_actions) {
  41     value = lmm_variable_getvalue(VARIABLE(action));
  42     if ((value > 0) || (action->max_duration >= 0))
  43       break;
  44   }
  45
  46   if (!action)
  47     return -1.0;
  48
  49   if (value > 0) {
  50     min = value = action->remains / value;
  51     if ((action->max_duration >= 0) && (action->max_duration < min))
  52       min = action->max_duration;
  53   } else
  54     min = action->max_duration;
  55
  56
  57   for (action = xbt_swag_getNext(action, running_actions->offset);
  58        action;
  59        action = xbt_swag_getNext(action, running_actions->offset)) {
  60     value = lmm_variable_getvalue(VARIABLE(action));
  61     if (value > 0) {
  62       value = action->remains / value;
  63       if (value < min)
  64         min = value;
  65     }
  66     if ((action->max_duration >= 0) && (action->max_duration < min))
  67       min = action->max_duration;
  68   }
  69 #undef VARIABLE
  70   return min;
  71 }
  72
  73 e_surf_action_state_t surf_action_get_state(surf_action_t action)
  74 {
  75   surf_action_state_t action_state =
  76       &(action->resource_type->common_public->states);
  77
  78   if (action->state_set == action_state->ready_action_set)
  79     return SURF_ACTION_READY;
  80   if (action->state_set == action_state->running_action_set)
  81     return SURF_ACTION_RUNNING;
  82   if (action->state_set == action_state->failed_action_set)
  83     return SURF_ACTION_FAILED;
  84   if (action->state_set == action_state->done_action_set)
  85     return SURF_ACTION_DONE;
  86   return SURF_ACTION_NOT_IN_THE_SYSTEM;
  87 }
  88
  89 void surf_action_free(surf_action_t * action)
  90 {
  91   (*action)->resource_type->common_public->action_cancel(*action);
  92   free(*action);
  93   *action = NULL;
  94 }
  95
  96 void surf_action_change_state(surf_action_t action,
  97                               e_surf_action_state_t state)
  98 {
  99   surf_action_state_t action_state =
 100       &(action->resource_type->common_public->states);
 101
 102   xbt_swag_remove(action, action->state_set);
 103
 104   if (state == SURF_ACTION_READY)
 105     action->state_set = action_state->ready_action_set;
 106   else if (state == SURF_ACTION_RUNNING)
 107     action->state_set = action_state->running_action_set;
 108   else if (state == SURF_ACTION_FAILED)
 109     action->state_set = action_state->failed_action_set;
 110   else if (state == SURF_ACTION_DONE)
 111     action->state_set = action_state->done_action_set;
 112   else
 113     action->state_set = NULL;
 114
 115   if (action->state_set)
 116     xbt_swag_insert(action, action->state_set);
 117 }
 118
 119 void surf_action_set_data(surf_action_t action,
 120                           void *data)
 121 {
 122   action->data=data;
 123 }
 124
 125 /* HACKHACK: msg_global must be set to a sensible value (like NULL) to use the logging mecanisme
 126  * since log_default_appender use xbt_procname which, in SG, is defined in src/msg/m_process.c
 127  * (in RL, xbt_procname is defined in src/gras/Virtu/rl_process.c)
 128  */
 129 extern void *msg_global;
 130
 131 void surf_init(int *argc, char **argv)
 132 {
 133   int i,j;
 134   char *opt;
 135
 136   xbt_init(argc, argv);
 137   msg_global=NULL; /* see HACKHACK note above */
 138   if (!surf_path) {
 139     const char *initial_path = "./";
 140     surf_path = xbt_dynar_new(sizeof(char*), NULL);
 141     xbt_dynar_push(surf_path,&initial_path);
 142
 143     for (i=1; i<*argc; i++) {
 144       if (!strncmp(argv[i],"--surf-path=",strlen("--surf-path="))) {
 145         opt=strchr(argv[i],'=');
 146         opt++;
 147         xbt_dynar_push(surf_path,&opt);
 148         /*remove this from argv*/
 149         for (j=i+1; j<*argc; j++) {
 150           argv[j-1] = argv[j];
 151         }
 152         argv[j-1] = NULL;
 153         (*argc)--;
 154         i--; /* compensate effect of next loop incrementation */
 155       }
 156     }
 157   }
 158   if (!resource_list)
 159     resource_list = xbt_dynar_new(sizeof(surf_resource_private_t), NULL);
 160   if (!history)
 161     history = tmgr_history_new();
 162   if (!maxmin_system)
 163     maxmin_system = lmm_system_new();
 164 }
 165
 166 static char* path_name = NULL;
 167 FILE *surf_fopen(const char *name, const char *mode)
 168 {
 169   int i;
 170   char* path = NULL;
 171   FILE *file = NULL;
 172   int path_name_len = 0; /* don't count '\0' */
 173
 174   xbt_assert0(name, "Need a non-NULL file name");
 175
 176   xbt_assert0(surf_path,"surf_init has to be called before using surf_fopen");
 177
 178   if (name[0] == '/') { /* don't mess with absolute file names */
 179     return fopen(name,mode);
 180
 181   } else { /* search relative files in the path */
 182
 183     if(!path_name) {
 184        path_name_len = strlen(name);
 185        path_name=xbt_new0(char,path_name_len+1);
 186     }
 187
 188     xbt_dynar_foreach(surf_path,i,path) {
 189       if(path_name_len < strlen(path)+strlen(name)+1) {
 190          path_name_len = strlen(path)+strlen(name)+1; /* plus '/' */
 191          path_name=xbt_realloc(path_name,path_name_len+1);
 192       }
 193       sprintf(path_name,"%s/%s",path, name);
 194       file = fopen(path_name,mode);
 195       if (file) return file;
 196     }
 197   }
 198   return file;
 199 }
 200
 201 void surf_finalize(void)
 202 {
 203   int i;
 204   surf_resource_t resource = NULL;
 205
 206   xbt_dynar_foreach(resource_list, i, resource) {
 207     resource->common_private->finalize();
 208   }
 209
 210   if (maxmin_system) {
 211     lmm_system_free(maxmin_system);
 212     maxmin_system = NULL;
 213   }
 214   if (history) {
 215     tmgr_history_free(history);
 216     history = NULL;
 217   }
 218   if (resource_list)
 219     xbt_dynar_free(&resource_list);
 220
 221   if(surf_path)
 222     xbt_dynar_free(&surf_path);
 223
 224   tmgr_finalize();
 225   surf_parse_lex_destroy();
 226   if(path_name) {
 227     free(path_name);
 228     path_name = NULL;
 229   }
 230 }
 231
 232 double surf_solve(void)
 233 {
 234   static int first_run = 1;
 235
 236   double min = -1.0;
 237   double next_event_date = -1.0;
 238   double resource_next_action_end = -1.0;
 239   double value = -1.0;
 240   surf_resource_object_t resource_obj = NULL;
 241   surf_resource_t resource = NULL;
 242   tmgr_trace_event_t event = NULL;
 243   int i;
 244
 245   if (first_run) {
 246     while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
 247       if (next_event_date > NOW)
 248         break;
 249       while ((event =
 250               tmgr_history_get_next_event_leq(history, next_event_date,
 251                                               &value,
 252                                               (void **) &resource_obj))) {
 253         resource_obj->resource->common_private->
 254             update_resource_state(resource_obj, event, value);
 255       }
 256     }
 257     xbt_dynar_foreach(resource_list, i, resource) {
 258       resource->common_private->update_actions_state(NOW, 0.0);
 259     }
 260     first_run = 0;
 261     return 0.0;
 262   }
 263
 264   min = -1.0;
 265
 266   xbt_dynar_foreach(resource_list, i, resource) {
 267     resource_next_action_end =
 268         resource->common_private->share_resources(NOW);
 269     if (((min < 0.0) || (resource_next_action_end < min))
 270         && (resource_next_action_end >= 0.0))
 271       min = resource_next_action_end;
 272   }
 273
 274   if (min < 0.0)
 275     return -1.0;
 276
 277   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
 278     if (next_event_date > NOW + min)
 279       break;
 280     while ((event =
 281             tmgr_history_get_next_event_leq(history, next_event_date,
 282                                             &value,
 283                                             (void **) &resource_obj))) {
 284       if (resource_obj->resource->common_private->
 285           resource_used(resource_obj)) {
 286         min = next_event_date - NOW;
 287       }
 288       /* update state of resource_obj according to new value. Does not touch lmm.
 289          It will be modified if needed when updating actions */
 290       resource_obj->resource->common_private->
 291           update_resource_state(resource_obj, event, value);
 292     }
 293   }
 294
 295
 296   xbt_dynar_foreach(resource_list, i, resource) {
 297     resource->common_private->update_actions_state(NOW, min);
 298   }
 299
 300   NOW = NOW + min;
 301
 302   return min;
 303 }
 304
 305 double surf_get_clock(void)
 306 {
 307   return NOW;
 308 }