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
 173   xbt_assert1((name!=NULL), "Need a real file name, not \"%s\"\n",name);
 174
 175   xbt_assert0(surf_path,"surf_init has to be called before using surf_fopen");
 176   if(!path_name) path_name=xbt_new0(char,strlen(name)+1);
 177
 178   xbt_dynar_foreach(surf_path,i,path) {
 179     if(strlen(path_name)<strlen(path)+strlen(name)+2)
 180       path_name=xbt_realloc(path_name,strlen(path)+strlen(name)+2);
 181     strcpy(path_name, path);
 182     strcat(path_name,"/");
 183     strcat(path_name,name);
 184     file = fopen(path_name,mode);
 185     if(file) return file;
 186   }
 187   return file;
 188 }
 189
 190 void surf_finalize(void)
 191 {
 192   int i;
 193   surf_resource_t resource = NULL;
 194
 195   xbt_dynar_foreach(resource_list, i, resource) {
 196     resource->common_private->finalize();
 197   }
 198
 199   if (maxmin_system) {
 200     lmm_system_free(maxmin_system);
 201     maxmin_system = NULL;
 202   }
 203   if (history) {
 204     tmgr_history_free(history);
 205     history = NULL;
 206   }
 207   if (resource_list)
 208     xbt_dynar_free(&resource_list);
 209
 210   if(surf_path)
 211     xbt_dynar_free(&surf_path);
 212
 213   tmgr_finalize();
 214   surf_parse_lex_destroy();
 215   if(path_name) {
 216     free(path_name);
 217     path_name = NULL;
 218   }
 219 }
 220
 221 double surf_solve(void)
 222 {
 223   static int first_run = 1;
 224
 225   double min = -1.0;
 226   double next_event_date = -1.0;
 227   double resource_next_action_end = -1.0;
 228   double value = -1.0;
 229   surf_resource_object_t resource_obj = NULL;
 230   surf_resource_t resource = NULL;
 231   tmgr_trace_event_t event = NULL;
 232   int i;
 233
 234   if (first_run) {
 235     while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
 236       if (next_event_date > NOW)
 237         break;
 238       while ((event =
 239               tmgr_history_get_next_event_leq(history, next_event_date,
 240                                               &value,
 241                                               (void **) &resource_obj))) {
 242         resource_obj->resource->common_private->
 243             update_resource_state(resource_obj, event, value);
 244       }
 245     }
 246     xbt_dynar_foreach(resource_list, i, resource) {
 247       resource->common_private->update_actions_state(NOW, 0.0);
 248     }
 249     first_run = 0;
 250     return 0.0;
 251   }
 252
 253   min = -1.0;
 254
 255   xbt_dynar_foreach(resource_list, i, resource) {
 256     resource_next_action_end =
 257         resource->common_private->share_resources(NOW);
 258     if (((min < 0.0) || (resource_next_action_end < min))
 259         && (resource_next_action_end >= 0.0))
 260       min = resource_next_action_end;
 261   }
 262
 263   if (min < 0.0)
 264     return -1.0;
 265
 266   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
 267     if (next_event_date > NOW + min)
 268       break;
 269     while ((event =
 270             tmgr_history_get_next_event_leq(history, next_event_date,
 271                                             &value,
 272                                             (void **) &resource_obj))) {
 273       if (resource_obj->resource->common_private->
 274           resource_used(resource_obj)) {
 275         min = next_event_date - NOW;
 276       }
 277       /* update state of resource_obj according to new value. Does not touch lmm.
 278          It will be modified if needed when updating actions */
 279       resource_obj->resource->common_private->
 280           update_resource_state(resource_obj, event, value);
 281     }
 282   }
 283
 284
 285   xbt_dynar_foreach(resource_list, i, resource) {
 286     resource->common_private->update_actions_state(NOW, min);
 287   }
 288
 289   NOW = NOW + min;
 290
 291   return min;
 292 }
 293
 294 double surf_get_clock(void)
 295 {
 296   return NOW;
 297 }