src/simdag/sd_global.c

   1 #include "private.h"
   2 #include "xbt/sysdep.h"
   3 #include "xbt/dynar.h"
   4 #include "surf/surf.h"
   5
   6 XBT_LOG_NEW_CATEGORY(sd,"Logging specific to SimDag");
   7 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_kernel,sd,
   8                                 "Logging specific to SimDag (kernel)");
   9
  10 SD_global_t sd_global = NULL;
  11
  12 /* Initialises SD internal data. This function should be called before any other SD function.
  13  */
  14 void SD_init(int *argc, char **argv) {
  15   xbt_assert0(sd_global == NULL, "SD_init already called");
  16
  17   sd_global = xbt_new0(s_SD_global_t, 1);
  18   sd_global->workstations = xbt_dict_new();
  19   sd_global->workstation_count = 0;
  20   sd_global->links = xbt_dict_new();
  21   sd_global->watch_point_reached = 0;
  22
  23   s_SD_task_t task;
  24   sd_global->not_scheduled_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
  25   sd_global->scheduled_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
  26   sd_global->ready_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
  27   sd_global->running_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
  28   sd_global->done_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
  29   sd_global->failed_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
  30
  31   surf_init(argc, argv);
  32 }
  33
  34 /* Creates the environnement described in a xml file of a platform description.
  35  */
  36 void SD_create_environment(const char *platform_file) {
  37   xbt_dict_cursor_t cursor = NULL;
  38   char *name = NULL;
  39   void *surf_workstation = NULL;
  40   void *surf_link = NULL;
  41
  42   SD_CHECK_INIT_DONE();
  43
  44   surf_timer_resource_init(platform_file);  /* tell Surf to create the environnement */
  45
  46
  47   /*printf("surf_workstation_resource = %p, workstation_set = %p\n", surf_workstation_resource, workstation_set);
  48     printf("surf_network_resource = %p, network_link_set = %p\n", surf_network_resource, network_link_set);*/
  49
  50   /*surf_workstation_resource_init_KCCFLN05(platform_file);*/
  51   surf_workstation_resource_init_CLM03(platform_file);
  52
  53   /*printf("surf_workstation_resource = %p, workstation_set = %p\n", surf_workstation_resource, workstation_set);
  54     printf("surf_network_resource = %p, network_link_set = %p\n", surf_network_resource, network_link_set);*/
  55
  56
  57   /* now let's create the SD wrappers for workstations and links */
  58   xbt_dict_foreach(workstation_set, cursor, name, surf_workstation) {
  59     __SD_workstation_create(surf_workstation, NULL);
  60   }
  61
  62   xbt_dict_foreach(network_link_set, cursor, name, surf_link) {
  63     __SD_link_create(surf_link, NULL);
  64   }
  65 }
  66
  67 /* Launches the simulation. Returns a NULL-terminated array of SD_task_t whose state has changed.
  68  */
  69 SD_task_t* SD_simulate(double how_long)
  70 {
  71   double total_time = 0.0; /* we stop the simulation when total_time >= how_long */
  72   double elapsed_time = 0.0;
  73   SD_task_t task;
  74   surf_action_t action;
  75   SD_task_t *changed_tasks = NULL;
  76   int changed_task_number = 0;
  77   int changed_task_capacity = 16; /* will be increased if necessary */
  78
  79   /* create the array that will be returned */
  80   changed_tasks = xbt_new0(SD_task_t, changed_task_capacity);
  81   changed_tasks[0] = NULL;
  82
  83   surf_solve(); /* Takes traces into account. Returns 0.0 */
  84
  85   sd_global->watch_point_reached = 0;
  86
  87   /* main loop */
  88   while (elapsed_time >= 0.0 && total_time < how_long && !sd_global->watch_point_reached) {
  89
  90     /* explore the ready tasks */
  91     xbt_swag_foreach(task, sd_global->ready_task_set) {
  92       INFO1("Executing task '%s'", SD_task_get_name(task));
  93       task->state_changed = 0;
  94       action = __SD_task_run(task);
  95       surf_workstation_resource->common_public->action_set_data(action, task);
  96       task->state_changed = 1;
  97
  98       changed_tasks[changed_task_number++] = task; /* replace NULL by the task */
  99       if (changed_task_number == changed_task_capacity) {
 100         changed_task_capacity *= 2;
 101         changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
 102       }
 103       changed_tasks[changed_task_number] = NULL;
 104     }
 105
 106     elapsed_time = surf_solve();
 107     if (elapsed_time > 0.0)
 108       total_time += elapsed_time;
 109
 110     /* let's see which tasks are done */
 111     while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.done_action_set))) {
 112       task = action->data;
 113       INFO1("Task '%s' done", SD_task_get_name(task));
 114       __SD_task_set_state(task, SD_DONE);
 115       __SD_task_remove_dependencies(task);
 116       if (!task->state_changed) {
 117         task->state_changed = 1;
 118         changed_tasks[changed_task_number++] = task;
 119       }
 120     }
 121
 122     /* let's see which tasks have just failed */
 123     while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.failed_action_set))) {
 124       task = action->data;
 125       INFO1("Task '%s' failed", SD_task_get_name(task));
 126       __SD_task_set_state(task, SD_FAILED);
 127       if (!task->state_changed) {
 128         task->state_changed = 1;
 129         changed_tasks[changed_task_number++] = task;
 130       }
 131     }
 132   }
 133
 134   INFO0("Simulation finished");
 135   INFO1("Number of tasks whose state has changed: %d", changed_task_number);
 136
 137   return changed_tasks;
 138 }
 139
 140 /* Destroys all SD internal data. This function should be called when the simulation is over.
 141  * The tasks should have been destroyed first.
 142  */
 143 void SD_exit(void) {
 144   if (sd_global != NULL) {
 145     xbt_dict_free(&sd_global->workstations);
 146     xbt_dict_free(&sd_global->links);
 147     xbt_free(sd_global);
 148
 149     xbt_swag_free(sd_global->not_scheduled_task_set);
 150     xbt_swag_free(sd_global->scheduled_task_set);
 151     xbt_swag_free(sd_global->ready_task_set);
 152     xbt_swag_free(sd_global->running_task_set);
 153     xbt_swag_free(sd_global->done_task_set);
 154     xbt_swag_free(sd_global->failed_task_set);
 155
 156     surf_exit();
 157   }
 158 }