src/simdag/sd_global.c

   1 #include "simdag/simdag.h"
   2 #include "private.h"
   3 #include "xbt/sysdep.h"
   4 #include "xbt/dynar.h"
   5 #include "surf/surf.h"
   6
   7 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_kernel, msg,
   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
  77   /* create the array that will be returned */
  78   const int task_number = xbt_swag_size(sd_global->scheduled_task_set) + xbt_swag_size(sd_global->running_task_set);
  79   SD_task_t *changed_tasks = xbt_new0(SD_task_t, task_number + 1);
  80   changed_tasks[task_number] = NULL;
  81   int changed_task_number = 0;
  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 scheduled tasks */
  91     xbt_swag_foreach(task, sd_global->scheduled_task_set) {
  92       INFO1("Examining task '%s'...", SD_task_get_name(task));
  93       task->state_changed = 0;
  94       if (xbt_dynar_length(task->tasks_before) == 0) {
  95         INFO1("The dependencies are satisfied. Executing task '%s'", SD_task_get_name(task));
  96         action = __SD_task_run(task);
  97         surf_workstation_resource->common_public->action_set_data(action, task);
  98         task->state_changed = 1;
  99         changed_tasks[changed_task_number++] = task;
 100       }
 101       else {
 102         INFO1("Cannot execute task '%s' now because some depencies are not satisfied.", SD_task_get_name(task));
 103       }
 104     }
 105
 106     elapsed_time = surf_solve();
 107     if (elapsed_time > 0.0)
 108       total_time += elapsed_time;
 109     /*    INFO1("Total time: %f", total_time);*/
 110
 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     while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.failed_action_set))) {
 123       task = action->data;
 124       INFO1("Task '%s' failed", SD_task_get_name(task));
 125       __SD_task_set_state(task, SD_FAILED);
 126       if (!task->state_changed) {
 127         task->state_changed = 1;
 128         changed_tasks[changed_task_number++] = task;
 129       }
 130     }
 131   }
 132
 133   INFO0("Simulation finished");
 134
 135   INFO1("Number of tasks whose state has changed: %d", changed_task_number);
 136   return changed_tasks;
 137 }
 138
 139 void SD_test() {
 140   /* temporary test to explore the workstations and the links */
 141   xbt_dict_cursor_t cursor = NULL;
 142   char *name = NULL;
 143   SD_workstation_t workstation = NULL;
 144   double power, available_power, bandwidth, latency;
 145   SD_link_t link = NULL;
 146
 147   surf_solve();
 148
 149   xbt_dict_foreach(sd_global->workstations, cursor, name, workstation) {
 150     power = SD_workstation_get_power(workstation);
 151     available_power = SD_workstation_get_available_power(workstation);
 152     printf("Workstation name: %s, power: %f Mflop/s, available power: %f%%\n", name, power, (available_power*100));
 153   }
 154
 155   xbt_dict_foreach(sd_global->links, cursor, name, link) {
 156     bandwidth = SD_link_get_current_bandwidth(link);
 157     latency = SD_link_get_current_latency(link);
 158     printf("Link name: %s, bandwidth: %f, latency: %f\n", name, bandwidth, latency);
 159   }
 160
 161   /* test the route between two workstations */
 162   SD_workstation_t src, dst;
 163   xbt_dict_cursor_first(sd_global->workstations, &cursor);
 164   xbt_dict_cursor_get_or_free(&cursor, &name, (void**) &src);
 165   xbt_dict_cursor_step(cursor);
 166   xbt_dict_cursor_get_or_free(&cursor, &name, (void**) &dst);
 167   xbt_dict_cursor_free(&cursor);
 168
 169   SD_link_t *route = SD_workstation_route_get_list(src, dst);
 170   int route_size = SD_workstation_route_get_size(src, dst);
 171
 172   printf("Route between %s and %s (%d links) : ", SD_workstation_get_name(src), SD_workstation_get_name(dst), route_size);
 173   int i;
 174   for (i = 0; i < route_size; i++) {
 175     printf("%s ", SD_link_get_name(route[i]));
 176   }
 177   printf("\n");
 178 }
 179
 180 /* Destroys all SD internal data. This function should be called when the simulation is over.
 181  * The tasks should have been destroyed first.
 182  */
 183 void SD_exit() {
 184   if (sd_global != NULL) {
 185     xbt_dict_free(&sd_global->workstations);
 186     xbt_dict_free(&sd_global->links);
 187     xbt_free(sd_global);
 188
 189     xbt_swag_free(sd_global->not_scheduled_task_set);
 190     xbt_swag_free(sd_global->scheduled_task_set);
 191     xbt_swag_free(sd_global->running_task_set);
 192     xbt_swag_free(sd_global->done_task_set);
 193     xbt_swag_free(sd_global->failed_task_set);
 194
 195     surf_exit();
 196   }
 197 }