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 typedef struct surf_resource_object {
  12   surf_resource_t resource;
  13 } s_surf_resource_object_t, *surf_resource_object_t;
  14
  15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_global, surf,
  16                                 "Logging specific to the SURF global module");
  17
  18
  19 static double NOW = 0;
  20
  21 xbt_dynar_t resource_list = NULL;
  22 tmgr_history_t history = NULL;
  23 lmm_system_t maxmin_system = NULL;
  24 xbt_dynar_t surf_path = NULL;
  25
  26 double generic_maxmin_share_resources(xbt_swag_t running_actions,
  27                                        size_t offset)
  28 {
  29   return  generic_maxmin_share_resources2(running_actions, offset,
  30                                           maxmin_system);
  31 }
  32
  33 double generic_maxmin_share_resources2(xbt_swag_t running_actions,
  34                                        size_t offset,
  35                                        lmm_system_t sys)
  36 {
  37   surf_action_t action = NULL;
  38   double min = -1;
  39   double value = -1;
  40 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + (offset))))
  41
  42   lmm_solve(sys);
  43
  44   xbt_swag_foreach(action, running_actions) {
  45     value = lmm_variable_getvalue(VARIABLE(action));
  46     if ((value > 0) || (action->max_duration >= 0))
  47       break;
  48   }
  49
  50   if (!action)
  51     return -1.0;
  52
  53   if (value > 0) {
  54     min = value = action->remains / value;
  55     if ((action->max_duration >= 0) && (action->max_duration < min))
  56       min = action->max_duration;
  57   } else
  58     min = action->max_duration;
  59
  60
  61   for (action = xbt_swag_getNext(action, running_actions->offset);
  62        action;
  63        action = xbt_swag_getNext(action, running_actions->offset)) {
  64     value = lmm_variable_getvalue(VARIABLE(action));
  65     if (value > 0) {
  66       value = action->remains / value;
  67       if (value < min)
  68         min = value;
  69     }
  70     if ((action->max_duration >= 0) && (action->max_duration < min))
  71       min = action->max_duration;
  72   }
  73 #undef VARIABLE
  74   return min;
  75 }
  76
  77 e_surf_action_state_t surf_action_get_state(surf_action_t action)
  78 {
  79   surf_action_state_t action_state =
  80       &(action->resource_type->common_public->states);
  81
  82   if (action->state_set == action_state->ready_action_set)
  83     return SURF_ACTION_READY;
  84   if (action->state_set == action_state->running_action_set)
  85     return SURF_ACTION_RUNNING;
  86   if (action->state_set == action_state->failed_action_set)
  87     return SURF_ACTION_FAILED;
  88   if (action->state_set == action_state->done_action_set)
  89     return SURF_ACTION_DONE;
  90   return SURF_ACTION_NOT_IN_THE_SYSTEM;
  91 }
  92
  93 void surf_action_free(surf_action_t * action)
  94 {
  95   (*action)->resource_type->common_public->action_cancel(*action);
  96   free(*action);
  97   *action = NULL;
  98 }
  99
 100 void surf_action_change_state(surf_action_t action,
 101                               e_surf_action_state_t state)
 102 {
 103   surf_action_state_t action_state =
 104       &(action->resource_type->common_public->states);
 105
 106   xbt_swag_remove(action, action->state_set);
 107
 108   if (state == SURF_ACTION_READY)
 109     action->state_set = action_state->ready_action_set;
 110   else if (state == SURF_ACTION_RUNNING)
 111     action->state_set = action_state->running_action_set;
 112   else if (state == SURF_ACTION_FAILED)
 113     action->state_set = action_state->failed_action_set;
 114   else if (state == SURF_ACTION_DONE)
 115     action->state_set = action_state->done_action_set;
 116   else
 117     action->state_set = NULL;
 118
 119   if (action->state_set)
 120     xbt_swag_insert(action, action->state_set);
 121 }
 122
 123 void surf_action_set_data(surf_action_t action,
 124                           void *data)
 125 {
 126   action->data=data;
 127 }
 128
 129 /* HACKHACK: msg_global must be set to a sensible value (like NULL) to use the logging mecanisme
 130  * since log_default_appender use xbt_procname which, in SG, is defined in src/msg/m_process.c
 131  * (in RL, xbt_procname is defined in src/gras/Virtu/rl_process.c)
 132  */
 133 extern void *msg_global;
 134
 135 void surf_init(int *argc, char **argv)
 136 {
 137   int i,j;
 138   char *opt;
 139
 140   xbt_init(argc, argv);
 141   msg_global=NULL; /* see HACKHACK note above */
 142   if (!surf_path) {
 143     const char *initial_path = "./";
 144     surf_path = xbt_dynar_new(sizeof(char*), NULL);
 145     xbt_dynar_push(surf_path,&initial_path);
 146
 147     for (i=1; i<*argc; i++) {
 148       if (!strncmp(argv[i],"--surf-path=",strlen("--surf-path="))) {
 149         opt=strchr(argv[i],'=');
 150         opt++;
 151         xbt_dynar_push(surf_path,&opt);
 152         /*remove this from argv*/
 153         for (j=i+1; j<*argc; j++) {
 154           argv[j-1] = argv[j];
 155         }
 156         argv[j-1] = NULL;
 157         (*argc)--;
 158         i--; /* compensate effect of next loop incrementation */
 159       }
 160     }
 161   }
 162   if (!resource_list)
 163     resource_list = xbt_dynar_new(sizeof(surf_resource_private_t), NULL);
 164   if (!history)
 165     history = tmgr_history_new();
 166   if (!maxmin_system)
 167     maxmin_system = lmm_system_new();
 168 }
 169
 170 static char* path_name = NULL;
 171 FILE *surf_fopen(const char *name, const char *mode)
 172 {
 173   int i;
 174   char* path = NULL;
 175   FILE *file = NULL;
 176   int path_name_len = 0; /* don't count '\0' */
 177
 178   xbt_assert0(name, "Need a non-NULL file name");
 179
 180   xbt_assert0(surf_path,"surf_init has to be called before using surf_fopen");
 181
 182   if (name[0] == '/') { /* don't mess with absolute file names */
 183     return fopen(name,mode);
 184
 185   } else { /* search relative files in the path */
 186
 187     if(!path_name) {
 188        path_name_len = strlen(name);
 189        path_name=xbt_new0(char,path_name_len+1);
 190     }
 191
 192     xbt_dynar_foreach(surf_path,i,path) {
 193       if(path_name_len < strlen(path)+strlen(name)+1) {
 194          path_name_len = strlen(path)+strlen(name)+1; /* plus '/' */
 195          path_name=xbt_realloc(path_name,path_name_len+1);
 196       }
 197       sprintf(path_name,"%s/%s",path, name);
 198       file = fopen(path_name,mode);
 199       if (file) return file;
 200     }
 201   }
 202   return file;
 203 }
 204
 205 void surf_finalize(void)
 206 {
 207   int i;
 208   surf_resource_t resource = NULL;
 209
 210   xbt_dynar_foreach(resource_list, i, resource) {
 211     resource->common_private->finalize();
 212   }
 213
 214   if (maxmin_system) {
 215     lmm_system_free(maxmin_system);
 216     maxmin_system = NULL;
 217   }
 218   if (history) {
 219     tmgr_history_free(history);
 220     history = NULL;
 221   }
 222   if (resource_list)
 223     xbt_dynar_free(&resource_list);
 224
 225   if(surf_path)
 226     xbt_dynar_free(&surf_path);
 227
 228   tmgr_finalize();
 229   surf_parse_lex_destroy();
 230   if(path_name) {
 231     free(path_name);
 232     path_name = NULL;
 233   }
 234 }
 235
 236 double surf_solve(void)
 237 {
 238   static int first_run = 1;
 239
 240   double min = -1.0;
 241   double next_event_date = -1.0;
 242   double resource_next_action_end = -1.0;
 243   double value = -1.0;
 244   surf_resource_object_t resource_obj = NULL;
 245   surf_resource_t resource = NULL;
 246   tmgr_trace_event_t event = NULL;
 247   int i;
 248
 249   if (first_run) {
 250     while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
 251       if (next_event_date > NOW)
 252         break;
 253       while ((event =
 254               tmgr_history_get_next_event_leq(history, next_event_date,
 255                                               &value,
 256                                               (void **) &resource_obj))) {
 257         resource_obj->resource->common_private->
 258             update_resource_state(resource_obj, event, value);
 259       }
 260     }
 261     xbt_dynar_foreach(resource_list, i, resource) {
 262       resource->common_private->update_actions_state(NOW, 0.0);
 263     }
 264     first_run = 0;
 265     return 0.0;
 266   }
 267
 268   min = -1.0;
 269
 270   xbt_dynar_foreach(resource_list, i, resource) {
 271     resource_next_action_end =
 272         resource->common_private->share_resources(NOW);
 273     if (((min < 0.0) || (resource_next_action_end < min))
 274         && (resource_next_action_end >= 0.0))
 275       min = resource_next_action_end;
 276   }
 277
 278   if (min < 0.0)
 279     return -1.0;
 280
 281   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
 282     if (next_event_date > NOW + min)
 283       break;
 284     while ((event =
 285             tmgr_history_get_next_event_leq(history, next_event_date,
 286                                             &value,
 287                                             (void **) &resource_obj))) {
 288       if (resource_obj->resource->common_private->
 289           resource_used(resource_obj)) {
 290         min = next_event_date - NOW;
 291       }
 292       /* update state of resource_obj according to new value. Does not touch lmm.
 293          It will be modified if needed when updating actions */
 294       resource_obj->resource->common_private->
 295           update_resource_state(resource_obj, event, value);
 296     }
 297   }
 298
 299
 300   xbt_dynar_foreach(resource_list, i, resource) {
 301     resource->common_private->update_actions_state(NOW, min);
 302   }
 303
 304   NOW = NOW + min;
 305
 306   return min;
 307 }
 308
 309 double surf_get_clock(void)
 310 {
 311   return NOW;
 312 }