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->running_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
  27   sd_global->done_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
  28   sd_global->failed_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
  29
  30   surf_init(argc, argv);
  31 }
  32
  33 /* Creates the environnement described in a xml file of a platform description.
  34  */
  35 void SD_create_environment(const char *platform_file) {
  36   xbt_dict_cursor_t cursor = NULL;
  37   char *name = NULL;
  38   void *surf_workstation = NULL;
  39   void *surf_link = NULL;
  40
  41   SD_CHECK_INIT_DONE();
  42
  43   surf_timer_resource_init(platform_file);  /* tell Surf to create the environnement */
  44
  45
  46   /*printf("surf_workstation_resource = %p, workstation_set = %p\n", surf_workstation_resource, workstation_set);
  47     printf("surf_network_resource = %p, network_link_set = %p\n", surf_network_resource, network_link_set);*/
  48
  49   /*surf_workstation_resource_init_KCCFLN05(platform_file);*/
  50   surf_workstation_resource_init_CLM03(platform_file);
  51
  52   /*printf("surf_workstation_resource = %p, workstation_set = %p\n", surf_workstation_resource, workstation_set);
  53     printf("surf_network_resource = %p, network_link_set = %p\n", surf_network_resource, network_link_set);*/
  54
  55
  56   /* now let's create the SD wrappers for workstations and links */
  57   xbt_dict_foreach(workstation_set, cursor, name, surf_workstation) {
  58     __SD_workstation_create(surf_workstation, NULL);
  59   }
  60
  61   xbt_dict_foreach(network_link_set, cursor, name, surf_link) {
  62     __SD_link_create(surf_link, NULL);
  63   }
  64 }
  65
  66 /* Launches the simulation. Returns a NULL-terminated array of SD_task_t whose state has changed.
  67  */
  68 SD_task_t* SD_simulate(double how_long)
  69 {
  70   /* TODO */
  71
  72   double total_time = 0.0; /* we stop the simulation when total_time >= how_long */
  73   double elapsed_time = 0.0;
  74   SD_task_t task;
  75   surf_action_t action;
  76   SD_task_t *changed_tasks = NULL;
  77   int changed_task_number = 0;
  78   int changed_task_capacity = 16;
  79
  80   /* create the array that will be returned */
  81   changed_tasks = xbt_new0(SD_task_t, changed_task_capacity); /* changed_task_capacity will be increased if necessary */
  82   changed_tasks[0] = NULL;
  83
  84   surf_solve(); /* Takes traces into account. Returns 0.0 */
  85
  86   sd_global->watch_point_reached = 0;
  87
  88   /* main loop */
  89   while (elapsed_time >= 0.0 && total_time < how_long && !sd_global->watch_point_reached) {
  90
  91     /* explore the scheduled tasks */
  92     xbt_swag_foreach(task, sd_global->scheduled_task_set) {
  93       INFO1("Examining task '%s'...", SD_task_get_name(task));
  94       task->state_changed = 0;
  95       if (xbt_dynar_length(task->tasks_before) == 0) {
  96         INFO1("The dependencies are satisfied. Executing task '%s'", SD_task_get_name(task));
  97         action = __SD_task_run(task);
  98         surf_workstation_resource->common_public->action_set_data(action, task);
  99         task->state_changed = 1;
 100
 101         changed_tasks[changed_task_number++] = task; /* replace NULL by the task */
 102         if (changed_task_number == changed_task_capacity) {
 103           changed_task_capacity *= 2;
 104           changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
 105         }
 106         changed_tasks[changed_task_number] = NULL;
 107       }
 108       else {
 109         INFO1("Cannot execute task '%s' now because some depencies are not satisfied.", SD_task_get_name(task));
 110       }
 111     }
 112
 113     elapsed_time = surf_solve();
 114     if (elapsed_time > 0.0)
 115       total_time += elapsed_time;
 116     /*    INFO1("Total time: %f", total_time);*/
 117
 118     while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.done_action_set))) {
 119       task = action->data;
 120       INFO1("Task '%s' done", SD_task_get_name(task));
 121       __SD_task_set_state(task, SD_DONE);
 122       __SD_task_remove_dependencies(task);
 123       if (!task->state_changed) {
 124         task->state_changed = 1;
 125         changed_tasks[changed_task_number++] = task;
 126       }
 127     }
 128
 129     while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.failed_action_set))) {
 130       task = action->data;
 131       INFO1("Task '%s' failed", SD_task_get_name(task));
 132       __SD_task_set_state(task, SD_FAILED);
 133       if (!task->state_changed) {
 134         task->state_changed = 1;
 135         changed_tasks[changed_task_number++] = task;
 136       }
 137     }
 138   }
 139
 140   INFO0("Simulation finished");
 141
 142   INFO1("Number of tasks whose state has changed: %d", changed_task_number);
 143   return changed_tasks;
 144 }
 145
 146 /* Destroys all SD internal data. This function should be called when the simulation is over.
 147  * The tasks should have been destroyed first.
 148  */
 149 void SD_exit(void) {
 150   if (sd_global != NULL) {
 151     xbt_dict_free(&sd_global->workstations);
 152     xbt_dict_free(&sd_global->links);
 153     xbt_free(sd_global);
 154
 155     xbt_swag_free(sd_global->not_scheduled_task_set);
 156     xbt_swag_free(sd_global->scheduled_task_set);
 157     xbt_swag_free(sd_global->running_task_set);
 158     xbt_swag_free(sd_global->done_task_set);
 159     xbt_swag_free(sd_global->failed_task_set);
 160
 161     surf_exit();
 162   }
 163 }