src/surf/cpu_im.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
  10 #undef GENERIC_LMM_ACTION
  11 #undef GENERIC_ACTION
  12 #undef ACTION_GET_CPU
  13 #define GENERIC_LMM_ACTION(action) action->generic_lmm_action
  14 #define GENERIC_ACTION(action) GENERIC_LMM_ACTION(action).generic_action
  15 #define ACTION_GET_CPU(action) ((surf_action_cpu_Cas01_im_t) action)->cpu
  16
  17 typedef struct surf_action_cpu_cas01_im {
  18   s_surf_action_lmm_t generic_lmm_action;
  19   s_xbt_swag_hookup_t cpu_list_hookup;
  20   int index_heap;
  21   void *cpu;
  22 } s_surf_action_cpu_Cas01_im_t, *surf_action_cpu_Cas01_im_t;
  23
  24 typedef struct cpu_Cas01_im {
  25   s_surf_resource_t generic_resource;
  26   s_xbt_swag_hookup_t modified_cpu_hookup;
  27   double power_peak;
  28   double power_scale;
  29   tmgr_trace_event_t power_event;
  30   e_surf_resource_state_t state_current;
  31   tmgr_trace_event_t state_event;
  32   lmm_constraint_t constraint;
  33   xbt_swag_t action_set;
  34   double last_update;
  35 } s_cpu_Cas01_im_t, *cpu_Cas01_im_t;
  36
  37 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_im, surf,
  38                                 "Logging specific to the SURF CPU IMPROVED module");
  39
  40
  41 lmm_system_t cpu_im_maxmin_system = NULL;
  42 static xbt_swag_t cpu_im_modified_cpu = NULL;
  43 static xbt_heap_t cpu_im_action_heap = NULL;
  44 extern int sg_maxmin_selective_update;
  45
  46
  47 static xbt_swag_t cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
  48
  49 static cpu_Cas01_im_t cpu_im_new(char *name, double power_peak,
  50                               double power_scale,
  51                               tmgr_trace_t power_trace,
  52                               e_surf_resource_state_t state_initial,
  53                               tmgr_trace_t state_trace,
  54                               xbt_dict_t cpu_properties)
  55 {
  56 #ifdef HAVE_TRACING
  57   TRACE_surf_host_declaration (name, power_scale * power_peak);
  58 #endif
  59
  60   cpu_Cas01_im_t cpu = xbt_new0(s_cpu_Cas01_im_t, 1);
  61   s_surf_action_cpu_Cas01_im_t action;
  62   xbt_assert1(!surf_model_resource_by_name(surf_cpu_model, name),
  63               "Host '%s' declared several times in the platform file", name);
  64   cpu->generic_resource.model = surf_cpu_model;
  65   cpu->generic_resource.name = name;
  66   cpu->generic_resource.properties = cpu_properties;
  67   cpu->power_peak = power_peak;
  68   xbt_assert0(cpu->power_peak > 0, "Power has to be >0");
  69   cpu->power_scale = power_scale;
  70   if (power_trace)
  71     cpu->power_event =
  72       tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
  73
  74   cpu->state_current = state_initial;
  75   if (state_trace)
  76     cpu->state_event =
  77       tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
  78
  79   cpu->constraint =
  80     lmm_constraint_new(cpu_im_maxmin_system, cpu,
  81                        cpu->power_scale * cpu->power_peak);
  82
  83   xbt_dict_set(surf_model_resource_set(surf_cpu_model), name, cpu,
  84                surf_resource_free);
  85   cpu->action_set = xbt_swag_new(xbt_swag_offset(action, cpu_list_hookup));
  86
  87   return cpu;
  88 }
  89
  90
  91 static void parse_cpu_im_init(void)
  92 {
  93   double power_peak = 0.0;
  94   double power_scale = 0.0;
  95   tmgr_trace_t power_trace = NULL;
  96   e_surf_resource_state_t state_initial = SURF_RESOURCE_OFF;
  97   tmgr_trace_t state_trace = NULL;
  98
  99   power_peak = get_cpu_power(A_surfxml_host_power);
 100   surf_parse_get_double(&power_scale, A_surfxml_host_availability);
 101   power_trace = tmgr_trace_new(A_surfxml_host_availability_file);
 102
 103   xbt_assert0((A_surfxml_host_state == A_surfxml_host_state_ON) ||
 104               (A_surfxml_host_state == A_surfxml_host_state_OFF),
 105               "Invalid state");
 106   if (A_surfxml_host_state == A_surfxml_host_state_ON)
 107     state_initial = SURF_RESOURCE_ON;
 108   if (A_surfxml_host_state == A_surfxml_host_state_OFF)
 109     state_initial = SURF_RESOURCE_OFF;
 110   state_trace = tmgr_trace_new(A_surfxml_host_state_file);
 111
 112   current_property_set = xbt_dict_new();
 113   cpu_im_new(xbt_strdup(A_surfxml_host_id), power_peak, power_scale,
 114           power_trace, state_initial, state_trace, current_property_set);
 115
 116 }
 117
 118 static void cpu_im_add_traces_cpu(void)
 119 {
 120   xbt_dict_cursor_t cursor = NULL;
 121   char *trace_name, *elm;
 122
 123   static int called = 0;
 124
 125   if (called)
 126     return;
 127   called = 1;
 128
 129
 130   /* connect all traces relative to hosts */
 131   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 132     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 133     cpu_Cas01_im_t host = surf_model_resource_by_name(surf_cpu_model, elm);
 134
 135     xbt_assert1(host, "Host %s undefined", elm);
 136     xbt_assert1(trace, "Trace %s undefined", trace_name);
 137
 138     host->state_event = tmgr_history_add_trace(history, trace, 0.0, 0, host);
 139   }
 140
 141   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 142     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 143     cpu_Cas01_im_t host = surf_model_resource_by_name(surf_cpu_model, elm);
 144
 145     xbt_assert1(host, "Host %s undefined", elm);
 146     xbt_assert1(trace, "Trace %s undefined", trace_name);
 147
 148     host->power_event = tmgr_history_add_trace(history, trace, 0.0, 0, host);
 149   }
 150 }
 151
 152 static void cpu_im_define_callbacks(const char *file)
 153 {
 154   surf_parse_reset_parser();
 155   surfxml_add_callback(STag_surfxml_host_cb_list, parse_cpu_im_init);
 156   surfxml_add_callback(ETag_surfxml_platform_cb_list, &cpu_im_add_traces_cpu);
 157 }
 158
 159 static int cpu_im_resource_used(void *resource_id)
 160 {
 161   return lmm_constraint_used(cpu_im_maxmin_system,
 162                              ((cpu_Cas01_im_t) resource_id)->constraint);
 163 }
 164
 165 static int cpu_im_action_unref(surf_action_t action)
 166 {
 167   action->refcount--;
 168   if (!action->refcount) {
 169     xbt_swag_remove(action, action->state_set);
 170     if (((surf_action_lmm_t) action)->variable)
 171       lmm_variable_free(cpu_im_maxmin_system,
 172                         ((surf_action_lmm_t) action)->variable);
 173     /* remove from heap */
 174     xbt_heap_remove(cpu_im_action_heap,
 175                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 176     xbt_swag_remove(action,
 177                     ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 178     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 179     free(action);
 180     return 1;
 181   }
 182   return 0;
 183 }
 184
 185 static void cpu_im_action_cancel(surf_action_t action)
 186 {
 187   surf_action_state_set(action, SURF_ACTION_FAILED);
 188   xbt_heap_remove(cpu_im_action_heap,
 189                   ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 190   xbt_swag_remove(action,
 191                   ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 192   return;
 193 }
 194
 195 static void cpu_im_cpu_action_state_set(surf_action_t action,
 196                                  e_surf_action_state_t state)
 197 {
 198 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 199 /*     if(((surf_action_lmm_t)action)->variable) { */
 200 /*       lmm_variable_disable(cpu_im_maxmin_system, ((surf_action_lmm_t)action)->variable); */
 201 /*       ((surf_action_lmm_t)action)->variable = NULL; */
 202 /*     } */
 203
 204   surf_action_state_set(action, state);
 205   return;
 206 }
 207
 208 static void cpu_im_update_remains(cpu_Cas01_im_t cpu, double now)
 209 {
 210   surf_action_cpu_Cas01_im_t action;
 211
 212   if (cpu->last_update >= now)
 213     return;
 214   xbt_swag_foreach(action, cpu->action_set) {
 215     if (GENERIC_ACTION(action).state_set !=
 216         surf_cpu_model->states.running_action_set)
 217       continue;
 218
 219     /* bogus priority, skip it */
 220     if (GENERIC_ACTION(action).priority <= 0)
 221       continue;
 222
 223     if (GENERIC_ACTION(action).remains > 0) {
 224       double_update(&(GENERIC_ACTION(action).remains),
 225                     lmm_variable_getvalue(GENERIC_LMM_ACTION
 226                                           (action).variable) * (now -
 227                                                                 cpu->last_update));
 228 #ifdef HAVE_TRACING
 229       TRACE_surf_host_set_utilization (cpu->generic_resource.name,
 230                 action->generic_lmm_action.generic_action.data, lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable), cpu->last_update, now-cpu->last_update);
 231 #endif
 232       DEBUG2("Update action(%p) remains %lf", action,
 233              GENERIC_ACTION(action).remains);
 234     }
 235   }
 236   cpu->last_update = now;
 237 }
 238
 239 static double cpu_im_share_resources(double now)
 240 {
 241   surf_action_cpu_Cas01_im_t action;
 242   double min;
 243   double value;
 244   cpu_Cas01_im_t cpu, cpu_next;
 245
 246   xbt_swag_foreach(cpu, cpu_im_modified_cpu)
 247     cpu_im_update_remains(cpu, now);
 248
 249   lmm_solve(cpu_im_maxmin_system);
 250
 251   xbt_swag_foreach_safe(cpu, cpu_next, cpu_im_modified_cpu) {
 252     xbt_swag_foreach(action, cpu->action_set) {
 253       if (GENERIC_ACTION(action).state_set !=
 254           surf_cpu_model->states.running_action_set)
 255         continue;
 256
 257       /* bogus priority, skip it */
 258       if (GENERIC_ACTION(action).priority <= 0)
 259         continue;
 260
 261       min = -1;
 262       value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 263       if (value > 0) {
 264         if (GENERIC_ACTION(action).remains > 0)
 265           value = GENERIC_ACTION(action).remains / value;
 266         else
 267           value = 0.0;
 268       }
 269       if (value > 0)
 270         min = now + value;
 271
 272       if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 273           && (min == -1
 274               || GENERIC_ACTION(action).start +
 275               GENERIC_ACTION(action).max_duration < min))
 276         min =
 277           GENERIC_ACTION(action).start + GENERIC_ACTION(action).max_duration;
 278
 279       DEBUG4("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 280              GENERIC_ACTION(action).start, now + value,
 281              GENERIC_ACTION(action).max_duration);
 282
 283       if (action->index_heap >= 0) {
 284         surf_action_cpu_Cas01_im_t heap_act =
 285           xbt_heap_remove(cpu_im_action_heap, action->index_heap);
 286         if (heap_act != action)
 287           DIE_IMPOSSIBLE;
 288       }
 289       if (min != -1) {
 290         xbt_heap_push(cpu_im_action_heap, action, min);
 291         DEBUG2("Insert at heap action(%p) min %lf", action, min);
 292       }
 293     }
 294     xbt_swag_remove(cpu, cpu_im_modified_cpu);
 295   }
 296   return xbt_heap_size(cpu_im_action_heap) >
 297     0 ? xbt_heap_maxkey(cpu_im_action_heap) - now : -1;
 298 }
 299
 300 static void cpu_im_update_actions_state(double now, double delta)
 301 {
 302   surf_action_cpu_Cas01_im_t action;
 303
 304   while ((xbt_heap_size(cpu_im_action_heap) > 0)
 305          && (double_equals(xbt_heap_maxkey(cpu_im_action_heap), now))) {
 306     action = xbt_heap_pop(cpu_im_action_heap);
 307     DEBUG1("Action %p: finish", action);
 308     GENERIC_ACTION(action).finish = surf_get_clock();
 309     /* set the remains to 0 due to precision problems when updating the remaining amount */
 310 #ifdef HAVE_TRACING
 311     TRACE_surf_host_set_utilization (((cpu_Cas01_im_t)(action->cpu))->generic_resource.name,
 312               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);
 313 #endif
 314     GENERIC_ACTION(action).remains = 0;
 315     cpu_im_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 316     cpu_im_update_remains(action->cpu, surf_get_clock());
 317   }
 318   return;
 319 }
 320
 321 static void cpu_im_update_resource_state(void *id,
 322                                   tmgr_trace_event_t event_type,
 323                                   double value, double date)
 324 {
 325   cpu_Cas01_im_t cpu = id;
 326
 327   if (event_type == cpu->power_event) {
 328     cpu->power_scale = value;
 329     lmm_update_constraint_bound(cpu_im_maxmin_system, cpu->constraint,
 330                                 cpu->power_scale * cpu->power_peak);
 331 #ifdef HAVE_TRACING
 332     TRACE_surf_host_set_power (date, cpu->generic_resource.name, cpu->power_scale * cpu->power_peak);
 333 #endif
 334     xbt_swag_insert(cpu, cpu_im_modified_cpu);
 335     if (tmgr_trace_event_free(event_type))
 336       cpu->power_event = NULL;
 337   } else if (event_type == cpu->state_event) {
 338     if (value > 0)
 339       cpu->state_current = SURF_RESOURCE_ON;
 340     else {
 341       lmm_constraint_t cnst = cpu->constraint;
 342       lmm_variable_t var = NULL;
 343       lmm_element_t elem = NULL;
 344
 345       cpu->state_current = SURF_RESOURCE_OFF;
 346
 347       while ((var = lmm_get_var_from_cnst(cpu_im_maxmin_system, cnst, &elem))) {
 348         surf_action_t action = lmm_variable_id(var);
 349
 350         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 351             surf_action_state_get(action) == SURF_ACTION_READY ||
 352             surf_action_state_get(action) == SURF_ACTION_NOT_IN_THE_SYSTEM) {
 353           action->finish = date;
 354           cpu_im_cpu_action_state_set(action, SURF_ACTION_FAILED);
 355         }
 356       }
 357     }
 358     if (tmgr_trace_event_free(event_type))
 359       cpu->state_event = NULL;
 360   } else {
 361     CRITICAL0("Unknown event ! \n");
 362     xbt_abort();
 363   }
 364
 365   return;
 366 }
 367
 368 static surf_action_t cpu_im_execute(void *cpu, double size)
 369 {
 370   surf_action_cpu_Cas01_im_t action = NULL;
 371   cpu_Cas01_im_t CPU = cpu;
 372
 373   XBT_IN2("(%s,%g)", surf_resource_name(CPU), size);
 374   action =
 375     surf_action_new(sizeof(s_surf_action_cpu_Cas01_im_t), size,
 376                     surf_cpu_model, CPU->state_current != SURF_RESOURCE_ON);
 377
 378   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 379                                                    calloc but it seems to help valgrind... */
 380
 381   GENERIC_LMM_ACTION(action).variable =
 382     lmm_variable_new(cpu_im_maxmin_system, action,
 383                      GENERIC_ACTION(action).priority, -1.0, 1);
 384   action->index_heap = -1;
 385   action->cpu = CPU;
 386   xbt_swag_insert(CPU, cpu_im_modified_cpu);
 387   xbt_swag_insert(action, CPU->action_set);
 388   lmm_expand(cpu_im_maxmin_system, CPU->constraint,
 389              GENERIC_LMM_ACTION(action).variable, 1.0);
 390   XBT_OUT;
 391   return (surf_action_t) action;
 392 }
 393
 394 static surf_action_t cpu_im_action_sleep(void *cpu, double duration)
 395 {
 396   surf_action_cpu_Cas01_im_t action = NULL;
 397
 398   if (duration > 0)
 399     duration = MAX(duration, MAXMIN_PRECISION);
 400
 401   XBT_IN2("(%s,%g)", surf_resource_name(cpu), duration);
 402   action = (surf_action_cpu_Cas01_im_t) cpu_im_execute(cpu, 1.0);
 403   GENERIC_ACTION(action).max_duration = duration;
 404   GENERIC_LMM_ACTION(action).suspended = 2;
 405   if (duration == NO_MAX_DURATION) {
 406     /* Move to the *end* of the corresponding action set. This convention
 407        is used to speed up update_resource_state  */
 408     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 409     ((surf_action_t) action)->state_set =
 410       cpu_im_running_action_set_that_does_not_need_being_checked;
 411     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 412   }
 413
 414   lmm_update_variable_weight(cpu_im_maxmin_system,
 415                              GENERIC_LMM_ACTION(action).variable, 0.0);
 416   xbt_swag_insert(cpu, cpu_im_modified_cpu);
 417   XBT_OUT;
 418   return (surf_action_t) action;
 419 }
 420
 421 static void cpu_im_action_suspend(surf_action_t action)
 422 {
 423   XBT_IN1("(%p)", action);
 424   if (((surf_action_lmm_t) action)->suspended != 2) {
 425     lmm_update_variable_weight(cpu_im_maxmin_system,
 426                                ((surf_action_lmm_t) action)->variable, 0.0);
 427     ((surf_action_lmm_t) action)->suspended = 1;
 428     xbt_heap_remove(cpu_im_action_heap,
 429                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 430     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 431   }
 432   XBT_OUT;
 433 }
 434
 435 static void cpu_im_action_resume(surf_action_t action)
 436 {
 437   XBT_IN1("(%p)", action);
 438   if (((surf_action_lmm_t) action)->suspended != 2) {
 439     lmm_update_variable_weight(cpu_im_maxmin_system,
 440                                ((surf_action_lmm_t) action)->variable,
 441                                action->priority);
 442     ((surf_action_lmm_t) action)->suspended = 0;
 443     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 444   }
 445   XBT_OUT;
 446 }
 447
 448 static int cpu_im_action_is_suspended(surf_action_t action)
 449 {
 450   return (((surf_action_lmm_t) action)->suspended == 1);
 451 }
 452
 453 static void cpu_im_action_set_max_duration(surf_action_t action, double duration)
 454 {
 455   XBT_IN2("(%p,%g)", action, duration);
 456
 457   action->max_duration = duration;
 458   /* insert cpu in modified_cpu set to notice the max duration change */
 459   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 460   XBT_OUT;
 461 }
 462
 463 static void cpu_im_action_set_priority(surf_action_t action, double priority)
 464 {
 465   XBT_IN2("(%p,%g)", action, priority);
 466   action->priority = priority;
 467   lmm_update_variable_weight(cpu_im_maxmin_system,
 468                              ((surf_action_lmm_t) action)->variable,
 469                              priority);
 470
 471   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 472   XBT_OUT;
 473 }
 474
 475 static double cpu_im_action_get_remains(surf_action_t action)
 476 {
 477   XBT_IN1("(%p)", action);
 478   /* update remains before return it */
 479   cpu_im_update_remains(ACTION_GET_CPU(action), surf_get_clock());
 480   return action->remains;
 481   XBT_OUT;
 482 }
 483
 484 static e_surf_resource_state_t cpu_im_get_state(void *cpu)
 485 {
 486   return ((cpu_Cas01_im_t) cpu)->state_current;
 487 }
 488
 489 static double cpu_im_get_speed(void *cpu, double load)
 490 {
 491   return load * (((cpu_Cas01_im_t) cpu)->power_peak);
 492 }
 493
 494 static double cpu_im_get_available_speed(void *cpu)
 495 {
 496   /* number between 0 and 1 */
 497   return ((cpu_Cas01_im_t) cpu)->power_scale;
 498 }
 499
 500 static void cpu_im_action_update_index_heap(void *action, int i)
 501 {
 502   ((surf_action_cpu_Cas01_im_t) action)->index_heap = i;
 503 }
 504
 505 static void cpu_im_finalize(void)
 506 {
 507   void *cpu;
 508   xbt_dict_cursor_t cursor;
 509   char *key;
 510   xbt_dict_foreach(surf_model_resource_set(surf_cpu_model), cursor, key, cpu) {
 511     cpu_Cas01_im_t CPU = cpu;
 512     xbt_swag_free(CPU->action_set);
 513   }
 514
 515   lmm_system_free(cpu_im_maxmin_system);
 516   cpu_im_maxmin_system = NULL;
 517
 518   surf_model_exit(surf_cpu_model);
 519   surf_cpu_model = NULL;
 520
 521   xbt_swag_free(cpu_im_running_action_set_that_does_not_need_being_checked);
 522   cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
 523   xbt_heap_free(cpu_im_action_heap);
 524   xbt_swag_free(cpu_im_modified_cpu);
 525 }
 526
 527 static void surf_cpu_im_model_init_internal(void)
 528 {
 529   s_surf_action_t action;
 530   s_cpu_Cas01_im_t cpu;
 531
 532   surf_cpu_model = surf_model_init();
 533
 534   cpu_im_running_action_set_that_does_not_need_being_checked =
 535     xbt_swag_new(xbt_swag_offset(action, state_hookup));
 536
 537   surf_cpu_model->name = "CPU_IM";
 538
 539   surf_cpu_model->action_unref = cpu_im_action_unref;
 540   surf_cpu_model->action_cancel = cpu_im_action_cancel;
 541   surf_cpu_model->action_state_set = cpu_im_cpu_action_state_set;
 542
 543   surf_cpu_model->model_private->resource_used = cpu_im_resource_used;
 544   surf_cpu_model->model_private->share_resources = cpu_im_share_resources;
 545   surf_cpu_model->model_private->update_actions_state = cpu_im_update_actions_state;
 546   surf_cpu_model->model_private->update_resource_state =
 547     cpu_im_update_resource_state;
 548   surf_cpu_model->model_private->finalize = cpu_im_finalize;
 549
 550   surf_cpu_model->suspend = cpu_im_action_suspend;
 551   surf_cpu_model->resume = cpu_im_action_resume;
 552   surf_cpu_model->is_suspended = cpu_im_action_is_suspended;
 553   surf_cpu_model->set_max_duration = cpu_im_action_set_max_duration;
 554   surf_cpu_model->set_priority = cpu_im_action_set_priority;
 555   surf_cpu_model->get_remains = cpu_im_action_get_remains;
 556
 557   surf_cpu_model->extension.cpu.execute = cpu_im_execute;
 558   surf_cpu_model->extension.cpu.sleep = cpu_im_action_sleep;
 559
 560   surf_cpu_model->extension.cpu.get_state = cpu_im_get_state;
 561   surf_cpu_model->extension.cpu.get_speed = cpu_im_get_speed;
 562   surf_cpu_model->extension.cpu.get_available_speed = cpu_im_get_available_speed;
 563
 564   if (!cpu_im_maxmin_system) {
 565     sg_maxmin_selective_update = 1;
 566     cpu_im_maxmin_system = lmm_system_new();
 567   }
 568   cpu_im_action_heap = xbt_heap_new(8, NULL);
 569   xbt_heap_set_update_callback(cpu_im_action_heap, cpu_im_action_update_index_heap);
 570   cpu_im_modified_cpu = xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
 571 }
 572
 573 /*********************************************************************/
 574 /* Basic sharing model for CPU: that is where all this started... ;) */
 575 /*********************************************************************/
 576 /* @InProceedings{casanova01simgrid, */
 577 /*   author =       "H. Casanova", */
 578 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 579 /*                  and the Grid (CCGrid'01)", */
 580 /*   publisher =    "IEEE Computer Society", */
 581 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 582 /*                  Scheduling", */
 583 /*   year =         "2001", */
 584 /*   month =        may, */
 585 /*   note =         "Available at */
 586 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 587 /* } */
 588 void surf_cpu_model_init_Cas01_im(const char *filename)
 589 {
 590   if (surf_cpu_model)
 591     return;
 592   surf_cpu_im_model_init_internal();
 593   cpu_im_define_callbacks(filename);
 594   xbt_dynar_push(model_list, &surf_cpu_model);
 595 }