src/surf/cpu_im.c

   1 /* Copyright (c) 2009, 2010. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include "surf_private.h"
   8
   9 #undef GENERIC_LMM_ACTION
  10 #undef GENERIC_ACTION
  11 #undef ACTION_GET_CPU
  12 #define GENERIC_LMM_ACTION(action) action->generic_lmm_action
  13 #define GENERIC_ACTION(action) GENERIC_LMM_ACTION(action).generic_action
  14 #define ACTION_GET_CPU(action) ((surf_action_cpu_Cas01_im_t) action)->cpu
  15
  16 typedef struct surf_action_cpu_cas01_im {
  17   s_surf_action_lmm_t generic_lmm_action;
  18   s_xbt_swag_hookup_t cpu_list_hookup;
  19   int index_heap;
  20   void *cpu;
  21 } s_surf_action_cpu_Cas01_im_t, *surf_action_cpu_Cas01_im_t;
  22
  23 typedef struct cpu_Cas01_im {
  24   s_surf_resource_t generic_resource;
  25   s_xbt_swag_hookup_t modified_cpu_hookup;
  26   double power_peak;
  27   double power_scale;
  28   tmgr_trace_event_t power_event;
  29   e_surf_resource_state_t state_current;
  30   tmgr_trace_event_t state_event;
  31   lmm_constraint_t constraint;
  32   xbt_swag_t action_set;
  33   double last_update;
  34 } s_cpu_Cas01_im_t, *cpu_Cas01_im_t;
  35
  36 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_im, surf,
  37                                 "Logging specific to the SURF CPU IMPROVED module");
  38
  39
  40 lmm_system_t cpu_im_maxmin_system = NULL;
  41 static xbt_swag_t cpu_im_modified_cpu = NULL;
  42 static xbt_heap_t cpu_im_action_heap = NULL;
  43 extern int sg_maxmin_selective_update;
  44
  45
  46 static xbt_swag_t cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
  47
  48 static cpu_Cas01_im_t cpu_im_new(char *name, double power_peak,
  49                               double power_scale,
  50                               tmgr_trace_t power_trace,
  51                               e_surf_resource_state_t state_initial,
  52                               tmgr_trace_t state_trace,
  53                               xbt_dict_t cpu_properties)
  54 {
  55 #ifdef HAVE_TRACING
  56   TRACE_surf_host_declaration (name, power_scale * power_peak);
  57 #endif
  58
  59   cpu_Cas01_im_t cpu = xbt_new0(s_cpu_Cas01_im_t, 1);
  60   s_surf_action_cpu_Cas01_im_t action;
  61   xbt_assert1(!surf_model_resource_by_name(surf_cpu_model, name),
  62               "Host '%s' declared several times in the platform file", name);
  63   cpu->generic_resource.model = surf_cpu_model;
  64   cpu->generic_resource.name = name;
  65   cpu->generic_resource.properties = cpu_properties;
  66   cpu->power_peak = power_peak;
  67   xbt_assert0(cpu->power_peak > 0, "Power has to be >0");
  68   cpu->power_scale = power_scale;
  69   if (power_trace)
  70     cpu->power_event =
  71       tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
  72
  73   cpu->state_current = state_initial;
  74   if (state_trace)
  75     cpu->state_event =
  76       tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
  77
  78   cpu->constraint =
  79     lmm_constraint_new(cpu_im_maxmin_system, cpu,
  80                        cpu->power_scale * cpu->power_peak);
  81
  82   xbt_dict_set(surf_model_resource_set(surf_cpu_model), name, cpu,
  83                surf_resource_free);
  84   cpu->action_set = xbt_swag_new(xbt_swag_offset(action, cpu_list_hookup));
  85
  86   return cpu;
  87 }
  88
  89
  90 static void parse_cpu_im_init(void)
  91 {
  92   double power_peak = 0.0;
  93   double power_scale = 0.0;
  94   tmgr_trace_t power_trace = NULL;
  95   e_surf_resource_state_t state_initial = SURF_RESOURCE_OFF;
  96   tmgr_trace_t state_trace = NULL;
  97
  98   power_peak = get_cpu_power(A_surfxml_host_power);
  99   surf_parse_get_double(&power_scale, A_surfxml_host_availability);
 100   power_trace = tmgr_trace_new(A_surfxml_host_availability_file);
 101
 102   xbt_assert0((A_surfxml_host_state == A_surfxml_host_state_ON) ||
 103               (A_surfxml_host_state == A_surfxml_host_state_OFF),
 104               "Invalid state");
 105   if (A_surfxml_host_state == A_surfxml_host_state_ON)
 106     state_initial = SURF_RESOURCE_ON;
 107   if (A_surfxml_host_state == A_surfxml_host_state_OFF)
 108     state_initial = SURF_RESOURCE_OFF;
 109   state_trace = tmgr_trace_new(A_surfxml_host_state_file);
 110
 111   current_property_set = xbt_dict_new();
 112   cpu_im_new(xbt_strdup(A_surfxml_host_id), power_peak, power_scale,
 113           power_trace, state_initial, state_trace, current_property_set);
 114
 115 }
 116
 117 static void cpu_im_add_traces_cpu(void)
 118 {
 119   xbt_dict_cursor_t cursor = NULL;
 120   char *trace_name, *elm;
 121
 122   static int called = 0;
 123
 124   if (called)
 125     return;
 126   called = 1;
 127
 128
 129   /* connect all traces relative to hosts */
 130   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 131     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 132     cpu_Cas01_im_t host = surf_model_resource_by_name(surf_cpu_model, elm);
 133
 134     xbt_assert1(host, "Host %s undefined", elm);
 135     xbt_assert1(trace, "Trace %s undefined", trace_name);
 136
 137     host->state_event = tmgr_history_add_trace(history, trace, 0.0, 0, host);
 138   }
 139
 140   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 141     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 142     cpu_Cas01_im_t host = surf_model_resource_by_name(surf_cpu_model, elm);
 143
 144     xbt_assert1(host, "Host %s undefined", elm);
 145     xbt_assert1(trace, "Trace %s undefined", trace_name);
 146
 147     host->power_event = tmgr_history_add_trace(history, trace, 0.0, 0, host);
 148   }
 149 }
 150
 151 static void cpu_im_define_callbacks(const char *file)
 152 {
 153   surf_parse_reset_parser();
 154   surfxml_add_callback(STag_surfxml_host_cb_list, parse_cpu_im_init);
 155   surfxml_add_callback(ETag_surfxml_platform_cb_list, &cpu_im_add_traces_cpu);
 156 }
 157
 158 static int cpu_im_resource_used(void *resource_id)
 159 {
 160   return lmm_constraint_used(cpu_im_maxmin_system,
 161                              ((cpu_Cas01_im_t) resource_id)->constraint);
 162 }
 163
 164 static int cpu_im_action_unref(surf_action_t action)
 165 {
 166   action->refcount--;
 167   if (!action->refcount) {
 168     xbt_swag_remove(action, action->state_set);
 169     if (((surf_action_lmm_t) action)->variable)
 170       lmm_variable_free(cpu_im_maxmin_system,
 171                         ((surf_action_lmm_t) action)->variable);
 172     /* remove from heap */
 173     xbt_heap_remove(cpu_im_action_heap,
 174                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 175     xbt_swag_remove(action,
 176                     ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 177     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 178     free(action);
 179     return 1;
 180   }
 181   return 0;
 182 }
 183
 184 static void cpu_im_action_cancel(surf_action_t action)
 185 {
 186   surf_action_state_set(action, SURF_ACTION_FAILED);
 187   xbt_heap_remove(cpu_im_action_heap,
 188                   ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 189   xbt_swag_remove(action,
 190                   ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 191   return;
 192 }
 193
 194 static void cpu_im_cpu_action_state_set(surf_action_t action,
 195                                  e_surf_action_state_t state)
 196 {
 197 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 198 /*     if(((surf_action_lmm_t)action)->variable) { */
 199 /*       lmm_variable_disable(cpu_im_maxmin_system, ((surf_action_lmm_t)action)->variable); */
 200 /*       ((surf_action_lmm_t)action)->variable = NULL; */
 201 /*     } */
 202
 203   surf_action_state_set(action, state);
 204   return;
 205 }
 206
 207 static void cpu_im_update_remains(cpu_Cas01_im_t cpu, double now)
 208 {
 209   surf_action_cpu_Cas01_im_t action;
 210
 211   if (cpu->last_update >= now)
 212     return;
 213   xbt_swag_foreach(action, cpu->action_set) {
 214     if (GENERIC_ACTION(action).state_set !=
 215         surf_cpu_model->states.running_action_set)
 216       continue;
 217
 218     /* bogus priority, skip it */
 219     if (GENERIC_ACTION(action).priority <= 0)
 220       continue;
 221
 222     if (GENERIC_ACTION(action).remains > 0) {
 223       double_update(&(GENERIC_ACTION(action).remains),
 224                     lmm_variable_getvalue(GENERIC_LMM_ACTION
 225                                           (action).variable) * (now -
 226                                                                 cpu->last_update));
 227 #ifdef HAVE_TRACING
 228       TRACE_surf_host_set_utilization (cpu->generic_resource.name,
 229                 action->generic_lmm_action.generic_action.data, lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable), cpu->last_update, now-cpu->last_update);
 230 #endif
 231       DEBUG2("Update action(%p) remains %lf", action,
 232              GENERIC_ACTION(action).remains);
 233     }
 234   }
 235   cpu->last_update = now;
 236 }
 237
 238 static double cpu_im_share_resources(double now)
 239 {
 240   surf_action_cpu_Cas01_im_t action;
 241   double min;
 242   double value;
 243   cpu_Cas01_im_t cpu, cpu_next;
 244
 245   xbt_swag_foreach(cpu, cpu_im_modified_cpu)
 246     cpu_im_update_remains(cpu, now);
 247
 248   lmm_solve(cpu_im_maxmin_system);
 249
 250   xbt_swag_foreach_safe(cpu, cpu_next, cpu_im_modified_cpu) {
 251     xbt_swag_foreach(action, cpu->action_set) {
 252       if (GENERIC_ACTION(action).state_set !=
 253           surf_cpu_model->states.running_action_set)
 254         continue;
 255
 256       /* bogus priority, skip it */
 257       if (GENERIC_ACTION(action).priority <= 0)
 258         continue;
 259
 260       min = -1;
 261       value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 262       if (value > 0) {
 263         if (GENERIC_ACTION(action).remains > 0)
 264           value = GENERIC_ACTION(action).remains / value;
 265         else
 266           value = 0.0;
 267       }
 268       if (value > 0)
 269         min = now + value;
 270
 271       if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 272           && (min == -1
 273               || GENERIC_ACTION(action).start +
 274               GENERIC_ACTION(action).max_duration < min))
 275         min =
 276           GENERIC_ACTION(action).start + GENERIC_ACTION(action).max_duration;
 277
 278       DEBUG4("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 279              GENERIC_ACTION(action).start, now + value,
 280              GENERIC_ACTION(action).max_duration);
 281
 282       if (action->index_heap >= 0) {
 283         surf_action_cpu_Cas01_im_t heap_act =
 284           xbt_heap_remove(cpu_im_action_heap, action->index_heap);
 285         if (heap_act != action)
 286           DIE_IMPOSSIBLE;
 287       }
 288       if (min != -1) {
 289         xbt_heap_push(cpu_im_action_heap, action, min);
 290         DEBUG2("Insert at heap action(%p) min %lf", action, min);
 291       }
 292     }
 293     xbt_swag_remove(cpu, cpu_im_modified_cpu);
 294   }
 295   return xbt_heap_size(cpu_im_action_heap) >
 296     0 ? xbt_heap_maxkey(cpu_im_action_heap) - now : -1;
 297 }
 298
 299 static void cpu_im_update_actions_state(double now, double delta)
 300 {
 301   surf_action_cpu_Cas01_im_t action;
 302
 303   while ((xbt_heap_size(cpu_im_action_heap) > 0)
 304          && (double_equals(xbt_heap_maxkey(cpu_im_action_heap), now))) {
 305     action = xbt_heap_pop(cpu_im_action_heap);
 306     DEBUG1("Action %p: finish", action);
 307     GENERIC_ACTION(action).finish = surf_get_clock();
 308     /* set the remains to 0 due to precision problems when updating the remaining amount */
 309 #ifdef HAVE_TRACING
 310     TRACE_surf_host_set_utilization (((cpu_Cas01_im_t)(action->cpu))->generic_resource.name,
 311               action->generic_lmm_action.generic_action.data, lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable), ((cpu_Cas01_im_t)(action->cpu))->last_update, now-((cpu_Cas01_im_t)(action->cpu))->last_update);
 312 #endif
 313     GENERIC_ACTION(action).remains = 0;
 314     cpu_im_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 315     cpu_im_update_remains(action->cpu, surf_get_clock());
 316   }
 317   return;
 318 }
 319
 320 static void cpu_im_update_resource_state(void *id,
 321                                   tmgr_trace_event_t event_type,
 322                                   double value, double date)
 323 {
 324   cpu_Cas01_im_t cpu = id;
 325
 326   if (event_type == cpu->power_event) {
 327     cpu->power_scale = value;
 328     lmm_update_constraint_bound(cpu_im_maxmin_system, cpu->constraint,
 329                                 cpu->power_scale * cpu->power_peak);
 330 #ifdef HAVE_TRACING
 331     TRACE_surf_host_set_power (date, cpu->generic_resource.name, cpu->power_scale * cpu->power_peak);
 332 #endif
 333     xbt_swag_insert(cpu, cpu_im_modified_cpu);
 334     if (tmgr_trace_event_free(event_type))
 335       cpu->power_event = NULL;
 336   } else if (event_type == cpu->state_event) {
 337     if (value > 0)
 338       cpu->state_current = SURF_RESOURCE_ON;
 339     else {
 340       lmm_constraint_t cnst = cpu->constraint;
 341       lmm_variable_t var = NULL;
 342       lmm_element_t elem = NULL;
 343
 344       cpu->state_current = SURF_RESOURCE_OFF;
 345
 346       while ((var = lmm_get_var_from_cnst(cpu_im_maxmin_system, cnst, &elem))) {
 347         surf_action_t action = lmm_variable_id(var);
 348
 349         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 350             surf_action_state_get(action) == SURF_ACTION_READY ||
 351             surf_action_state_get(action) == SURF_ACTION_NOT_IN_THE_SYSTEM) {
 352           action->finish = date;
 353           cpu_im_cpu_action_state_set(action, SURF_ACTION_FAILED);
 354         }
 355       }
 356     }
 357     if (tmgr_trace_event_free(event_type))
 358       cpu->state_event = NULL;
 359   } else {
 360     CRITICAL0("Unknown event ! \n");
 361     xbt_abort();
 362   }
 363
 364   return;
 365 }
 366
 367 static surf_action_t cpu_im_execute(void *cpu, double size)
 368 {
 369   surf_action_cpu_Cas01_im_t action = NULL;
 370   cpu_Cas01_im_t CPU = cpu;
 371
 372   XBT_IN2("(%s,%g)", surf_resource_name(CPU), size);
 373   action =
 374     surf_action_new(sizeof(s_surf_action_cpu_Cas01_im_t), size,
 375                     surf_cpu_model, CPU->state_current != SURF_RESOURCE_ON);
 376
 377   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 378                                                    calloc but it seems to help valgrind... */
 379
 380   GENERIC_LMM_ACTION(action).variable =
 381     lmm_variable_new(cpu_im_maxmin_system, action,
 382                      GENERIC_ACTION(action).priority, -1.0, 1);
 383   action->index_heap = -1;
 384   action->cpu = CPU;
 385   xbt_swag_insert(CPU, cpu_im_modified_cpu);
 386   xbt_swag_insert(action, CPU->action_set);
 387   lmm_expand(cpu_im_maxmin_system, CPU->constraint,
 388              GENERIC_LMM_ACTION(action).variable, 1.0);
 389   XBT_OUT;
 390   return (surf_action_t) action;
 391 }
 392
 393 static surf_action_t cpu_im_action_sleep(void *cpu, double duration)
 394 {
 395   surf_action_cpu_Cas01_im_t action = NULL;
 396
 397   if (duration > 0)
 398     duration = MAX(duration, MAXMIN_PRECISION);
 399
 400   XBT_IN2("(%s,%g)", surf_resource_name(cpu), duration);
 401   action = (surf_action_cpu_Cas01_im_t) cpu_im_execute(cpu, 1.0);
 402   GENERIC_ACTION(action).max_duration = duration;
 403   GENERIC_LMM_ACTION(action).suspended = 2;
 404   if (duration == NO_MAX_DURATION) {
 405     /* Move to the *end* of the corresponding action set. This convention
 406        is used to speed up update_resource_state  */
 407     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 408     ((surf_action_t) action)->state_set =
 409       cpu_im_running_action_set_that_does_not_need_being_checked;
 410     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 411   }
 412
 413   lmm_update_variable_weight(cpu_im_maxmin_system,
 414                              GENERIC_LMM_ACTION(action).variable, 0.0);
 415   xbt_swag_insert(cpu, cpu_im_modified_cpu);
 416   XBT_OUT;
 417   return (surf_action_t) action;
 418 }
 419
 420 static void cpu_im_action_suspend(surf_action_t action)
 421 {
 422   XBT_IN1("(%p)", action);
 423   if (((surf_action_lmm_t) action)->suspended != 2) {
 424     lmm_update_variable_weight(cpu_im_maxmin_system,
 425                                ((surf_action_lmm_t) action)->variable, 0.0);
 426     ((surf_action_lmm_t) action)->suspended = 1;
 427     xbt_heap_remove(cpu_im_action_heap,
 428                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 429     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 430   }
 431   XBT_OUT;
 432 }
 433
 434 static void cpu_im_action_resume(surf_action_t action)
 435 {
 436   XBT_IN1("(%p)", action);
 437   if (((surf_action_lmm_t) action)->suspended != 2) {
 438     lmm_update_variable_weight(cpu_im_maxmin_system,
 439                                ((surf_action_lmm_t) action)->variable,
 440                                action->priority);
 441     ((surf_action_lmm_t) action)->suspended = 0;
 442     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 443   }
 444   XBT_OUT;
 445 }
 446
 447 static int cpu_im_action_is_suspended(surf_action_t action)
 448 {
 449   return (((surf_action_lmm_t) action)->suspended == 1);
 450 }
 451
 452 static void cpu_im_action_set_max_duration(surf_action_t action, double duration)
 453 {
 454   XBT_IN2("(%p,%g)", action, duration);
 455
 456   action->max_duration = duration;
 457   /* insert cpu in modified_cpu set to notice the max duration change */
 458   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 459   XBT_OUT;
 460 }
 461
 462 static void cpu_im_action_set_priority(surf_action_t action, double priority)
 463 {
 464   XBT_IN2("(%p,%g)", action, priority);
 465   action->priority = priority;
 466   lmm_update_variable_weight(cpu_im_maxmin_system,
 467                              ((surf_action_lmm_t) action)->variable,
 468                              priority);
 469
 470   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 471   XBT_OUT;
 472 }
 473
 474 static double cpu_im_action_get_remains(surf_action_t action)
 475 {
 476   XBT_IN1("(%p)", action);
 477   /* update remains before return it */
 478   cpu_im_update_remains(ACTION_GET_CPU(action), surf_get_clock());
 479   return action->remains;
 480   XBT_OUT;
 481 }
 482
 483 static e_surf_resource_state_t cpu_im_get_state(void *cpu)
 484 {
 485   return ((cpu_Cas01_im_t) cpu)->state_current;
 486 }
 487
 488 static double cpu_im_get_speed(void *cpu, double load)
 489 {
 490   return load * (((cpu_Cas01_im_t) cpu)->power_peak);
 491 }
 492
 493 static double cpu_im_get_available_speed(void *cpu)
 494 {
 495   /* number between 0 and 1 */
 496   return ((cpu_Cas01_im_t) cpu)->power_scale;
 497 }
 498
 499 static void cpu_im_action_update_index_heap(void *action, int i)
 500 {
 501   ((surf_action_cpu_Cas01_im_t) action)->index_heap = i;
 502 }
 503
 504 static void cpu_im_finalize(void)
 505 {
 506   void *cpu;
 507   xbt_dict_cursor_t cursor;
 508   char *key;
 509   xbt_dict_foreach(surf_model_resource_set(surf_cpu_model), cursor, key, cpu) {
 510     cpu_Cas01_im_t CPU = cpu;
 511     xbt_swag_free(CPU->action_set);
 512   }
 513
 514   lmm_system_free(cpu_im_maxmin_system);
 515   cpu_im_maxmin_system = NULL;
 516
 517   surf_model_exit(surf_cpu_model);
 518   surf_cpu_model = NULL;
 519
 520   xbt_swag_free(cpu_im_running_action_set_that_does_not_need_being_checked);
 521   cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
 522   xbt_heap_free(cpu_im_action_heap);
 523   xbt_swag_free(cpu_im_modified_cpu);
 524 }
 525
 526 static void surf_cpu_im_model_init_internal(void)
 527 {
 528   s_surf_action_t action;
 529   s_cpu_Cas01_im_t cpu;
 530
 531   surf_cpu_model = surf_model_init();
 532
 533   cpu_im_running_action_set_that_does_not_need_being_checked =
 534     xbt_swag_new(xbt_swag_offset(action, state_hookup));
 535
 536   surf_cpu_model->name = "CPU_IM";
 537
 538   surf_cpu_model->action_unref = cpu_im_action_unref;
 539   surf_cpu_model->action_cancel = cpu_im_action_cancel;
 540   surf_cpu_model->action_state_set = cpu_im_cpu_action_state_set;
 541
 542   surf_cpu_model->model_private->resource_used = cpu_im_resource_used;
 543   surf_cpu_model->model_private->share_resources = cpu_im_share_resources;
 544   surf_cpu_model->model_private->update_actions_state = cpu_im_update_actions_state;
 545   surf_cpu_model->model_private->update_resource_state =
 546     cpu_im_update_resource_state;
 547   surf_cpu_model->model_private->finalize = cpu_im_finalize;
 548
 549   surf_cpu_model->suspend = cpu_im_action_suspend;
 550   surf_cpu_model->resume = cpu_im_action_resume;
 551   surf_cpu_model->is_suspended = cpu_im_action_is_suspended;
 552   surf_cpu_model->set_max_duration = cpu_im_action_set_max_duration;
 553   surf_cpu_model->set_priority = cpu_im_action_set_priority;
 554   surf_cpu_model->get_remains = cpu_im_action_get_remains;
 555
 556   surf_cpu_model->extension.cpu.execute = cpu_im_execute;
 557   surf_cpu_model->extension.cpu.sleep = cpu_im_action_sleep;
 558
 559   surf_cpu_model->extension.cpu.get_state = cpu_im_get_state;
 560   surf_cpu_model->extension.cpu.get_speed = cpu_im_get_speed;
 561   surf_cpu_model->extension.cpu.get_available_speed = cpu_im_get_available_speed;
 562
 563   if (!cpu_im_maxmin_system) {
 564     sg_maxmin_selective_update = 1;
 565     cpu_im_maxmin_system = lmm_system_new();
 566   }
 567   cpu_im_action_heap = xbt_heap_new(8, NULL);
 568   xbt_heap_set_update_callback(cpu_im_action_heap, cpu_im_action_update_index_heap);
 569   cpu_im_modified_cpu = xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
 570 }
 571
 572 /*********************************************************************/
 573 /* Basic sharing model for CPU: that is where all this started... ;) */
 574 /*********************************************************************/
 575 /* @InProceedings{casanova01simgrid, */
 576 /*   author =       "H. Casanova", */
 577 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 578 /*                  and the Grid (CCGrid'01)", */
 579 /*   publisher =    "IEEE Computer Society", */
 580 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 581 /*                  Scheduling", */
 582 /*   year =         "2001", */
 583 /*   month =        may, */
 584 /*   note =         "Available at */
 585 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 586 /* } */
 587 void surf_cpu_model_init_Cas01_im(const char *filename)
 588 {
 589   if (surf_cpu_model)
 590     return;
 591   surf_cpu_im_model_init_internal();
 592   cpu_im_define_callbacks(filename);
 593   xbt_dynar_push(model_list, &surf_cpu_model);
 594 }