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_cpu_new (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_update_action_state (action, action->generic_lmm_action.generic_action.data,
 230           lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable), "PowerUsed", cpu->last_update, now-cpu->last_update);
 231       TRACE_surf_update_action_state_cpu_resource (cpu->generic_resource.name,
 232                 action->generic_lmm_action.generic_action.data, lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable), cpu->last_update, now-cpu->last_update);
 233 #endif
 234       DEBUG2("Update action(%p) remains %lf", action,
 235              GENERIC_ACTION(action).remains);
 236     }
 237   }
 238   cpu->last_update = now;
 239 }
 240
 241 static double cpu_im_share_resources(double now)
 242 {
 243   surf_action_cpu_Cas01_im_t action;
 244   double min;
 245   double value;
 246   cpu_Cas01_im_t cpu, cpu_next;
 247
 248   xbt_swag_foreach(cpu, cpu_im_modified_cpu)
 249     cpu_im_update_remains(cpu, now);
 250
 251   lmm_solve(cpu_im_maxmin_system);
 252
 253   xbt_swag_foreach_safe(cpu, cpu_next, cpu_im_modified_cpu) {
 254     xbt_swag_foreach(action, cpu->action_set) {
 255       if (GENERIC_ACTION(action).state_set !=
 256           surf_cpu_model->states.running_action_set)
 257         continue;
 258
 259       /* bogus priority, skip it */
 260       if (GENERIC_ACTION(action).priority <= 0)
 261         continue;
 262
 263       min = -1;
 264       value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 265       if (value > 0) {
 266         if (GENERIC_ACTION(action).remains > 0)
 267           value = GENERIC_ACTION(action).remains / value;
 268         else
 269           value = 0.0;
 270       }
 271       if (value > 0)
 272         min = now + value;
 273
 274       if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 275           && (min == -1
 276               || GENERIC_ACTION(action).start +
 277               GENERIC_ACTION(action).max_duration < min))
 278         min =
 279           GENERIC_ACTION(action).start + GENERIC_ACTION(action).max_duration;
 280
 281       DEBUG4("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 282              GENERIC_ACTION(action).start, now + value,
 283              GENERIC_ACTION(action).max_duration);
 284
 285       if (action->index_heap >= 0) {
 286         surf_action_cpu_Cas01_im_t heap_act =
 287           xbt_heap_remove(cpu_im_action_heap, action->index_heap);
 288         if (heap_act != action)
 289           DIE_IMPOSSIBLE;
 290       }
 291       if (min != -1) {
 292         xbt_heap_push(cpu_im_action_heap, action, min);
 293         DEBUG2("Insert at heap action(%p) min %lf", action, min);
 294       }
 295     }
 296     xbt_swag_remove(cpu, cpu_im_modified_cpu);
 297   }
 298   return xbt_heap_size(cpu_im_action_heap) >
 299     0 ? xbt_heap_maxkey(cpu_im_action_heap) - now : -1;
 300 }
 301
 302 static void cpu_im_update_actions_state(double now, double delta)
 303 {
 304   surf_action_cpu_Cas01_im_t action;
 305
 306   while ((xbt_heap_size(cpu_im_action_heap) > 0)
 307          && (double_equals(xbt_heap_maxkey(cpu_im_action_heap), now))) {
 308     action = xbt_heap_pop(cpu_im_action_heap);
 309     DEBUG1("Action %p: finish", action);
 310     GENERIC_ACTION(action).finish = surf_get_clock();
 311     /* set the remains to 0 due to precision problems when updating the remaining amount */
 312 #ifdef HAVE_TRACING
 313     TRACE_surf_update_action_state (action, action->generic_lmm_action.generic_action.data,
 314         lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable), "PowerUsed", ((cpu_Cas01_im_t)(action->cpu))->last_update, now - ((cpu_Cas01_im_t)(action->cpu))->last_update);
 315     TRACE_surf_update_action_state_cpu_resource (((cpu_Cas01_im_t)(action->cpu))->generic_resource.name,
 316               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);
 317 #endif
 318     GENERIC_ACTION(action).remains = 0;
 319     cpu_im_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 320     cpu_im_update_remains(action->cpu, surf_get_clock());
 321   }
 322   return;
 323 }
 324
 325 static void cpu_im_update_resource_state(void *id,
 326                                   tmgr_trace_event_t event_type,
 327                                   double value, double date)
 328 {
 329   cpu_Cas01_im_t cpu = id;
 330
 331   if (event_type == cpu->power_event) {
 332     cpu->power_scale = value;
 333     lmm_update_constraint_bound(cpu_im_maxmin_system, cpu->constraint,
 334                                 cpu->power_scale * cpu->power_peak);
 335 #ifdef HAVE_TRACING
 336     TRACE_surf_cpu_set_power (date, cpu->generic_resource.name, cpu->power_scale * cpu->power_peak);
 337 #endif
 338     xbt_swag_insert(cpu, cpu_im_modified_cpu);
 339     if (tmgr_trace_event_free(event_type))
 340       cpu->power_event = NULL;
 341   } else if (event_type == cpu->state_event) {
 342     if (value > 0)
 343       cpu->state_current = SURF_RESOURCE_ON;
 344     else {
 345       lmm_constraint_t cnst = cpu->constraint;
 346       lmm_variable_t var = NULL;
 347       lmm_element_t elem = NULL;
 348
 349       cpu->state_current = SURF_RESOURCE_OFF;
 350
 351       while ((var = lmm_get_var_from_cnst(cpu_im_maxmin_system, cnst, &elem))) {
 352         surf_action_t action = lmm_variable_id(var);
 353
 354         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 355             surf_action_state_get(action) == SURF_ACTION_READY ||
 356             surf_action_state_get(action) == SURF_ACTION_NOT_IN_THE_SYSTEM) {
 357           action->finish = date;
 358           cpu_im_cpu_action_state_set(action, SURF_ACTION_FAILED);
 359         }
 360       }
 361     }
 362     if (tmgr_trace_event_free(event_type))
 363       cpu->state_event = NULL;
 364   } else {
 365     CRITICAL0("Unknown event ! \n");
 366     xbt_abort();
 367   }
 368
 369   return;
 370 }
 371
 372 static surf_action_t cpu_im_execute(void *cpu, double size)
 373 {
 374   surf_action_cpu_Cas01_im_t action = NULL;
 375   cpu_Cas01_im_t CPU = cpu;
 376
 377   XBT_IN2("(%s,%g)", surf_resource_name(CPU), size);
 378   action =
 379     surf_action_new(sizeof(s_surf_action_cpu_Cas01_im_t), size,
 380                     surf_cpu_model, CPU->state_current != SURF_RESOURCE_ON);
 381
 382   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 383                                                    calloc but it seems to help valgrind... */
 384
 385   GENERIC_LMM_ACTION(action).variable =
 386     lmm_variable_new(cpu_im_maxmin_system, action,
 387                      GENERIC_ACTION(action).priority, -1.0, 1);
 388   action->index_heap = -1;
 389   action->cpu = CPU;
 390   xbt_swag_insert(CPU, cpu_im_modified_cpu);
 391   xbt_swag_insert(action, CPU->action_set);
 392   lmm_expand(cpu_im_maxmin_system, CPU->constraint,
 393              GENERIC_LMM_ACTION(action).variable, 1.0);
 394   XBT_OUT;
 395   return (surf_action_t) action;
 396 }
 397
 398 static surf_action_t cpu_im_action_sleep(void *cpu, double duration)
 399 {
 400   surf_action_cpu_Cas01_im_t action = NULL;
 401
 402   if (duration > 0)
 403     duration = MAX(duration, MAXMIN_PRECISION);
 404
 405   XBT_IN2("(%s,%g)", surf_resource_name(cpu), duration);
 406   action = (surf_action_cpu_Cas01_im_t) cpu_im_execute(cpu, 1.0);
 407   GENERIC_ACTION(action).max_duration = duration;
 408   GENERIC_LMM_ACTION(action).suspended = 2;
 409   if (duration == NO_MAX_DURATION) {
 410     /* Move to the *end* of the corresponding action set. This convention
 411        is used to speed up update_resource_state  */
 412     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 413     ((surf_action_t) action)->state_set =
 414       cpu_im_running_action_set_that_does_not_need_being_checked;
 415     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 416   }
 417
 418   lmm_update_variable_weight(cpu_im_maxmin_system,
 419                              GENERIC_LMM_ACTION(action).variable, 0.0);
 420   xbt_swag_insert(cpu, cpu_im_modified_cpu);
 421   XBT_OUT;
 422   return (surf_action_t) action;
 423 }
 424
 425 static void cpu_im_action_suspend(surf_action_t action)
 426 {
 427   XBT_IN1("(%p)", action);
 428   if (((surf_action_lmm_t) action)->suspended != 2) {
 429     lmm_update_variable_weight(cpu_im_maxmin_system,
 430                                ((surf_action_lmm_t) action)->variable, 0.0);
 431     ((surf_action_lmm_t) action)->suspended = 1;
 432     xbt_heap_remove(cpu_im_action_heap,
 433                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 434     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 435   }
 436   XBT_OUT;
 437 }
 438
 439 static void cpu_im_action_resume(surf_action_t action)
 440 {
 441   XBT_IN1("(%p)", action);
 442   if (((surf_action_lmm_t) action)->suspended != 2) {
 443     lmm_update_variable_weight(cpu_im_maxmin_system,
 444                                ((surf_action_lmm_t) action)->variable,
 445                                action->priority);
 446     ((surf_action_lmm_t) action)->suspended = 0;
 447     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 448   }
 449   XBT_OUT;
 450 }
 451
 452 static int cpu_im_action_is_suspended(surf_action_t action)
 453 {
 454   return (((surf_action_lmm_t) action)->suspended == 1);
 455 }
 456
 457 static void cpu_im_action_set_max_duration(surf_action_t action, double duration)
 458 {
 459   XBT_IN2("(%p,%g)", action, duration);
 460
 461   action->max_duration = duration;
 462   /* insert cpu in modified_cpu set to notice the max duration change */
 463   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 464   XBT_OUT;
 465 }
 466
 467 static void cpu_im_action_set_priority(surf_action_t action, double priority)
 468 {
 469   XBT_IN2("(%p,%g)", action, priority);
 470   action->priority = priority;
 471   lmm_update_variable_weight(cpu_im_maxmin_system,
 472                              ((surf_action_lmm_t) action)->variable,
 473                              priority);
 474
 475   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 476   XBT_OUT;
 477 }
 478
 479 static double cpu_im_action_get_remains(surf_action_t action)
 480 {
 481   XBT_IN1("(%p)", action);
 482   /* update remains before return it */
 483   cpu_im_update_remains(ACTION_GET_CPU(action), surf_get_clock());
 484   return action->remains;
 485   XBT_OUT;
 486 }
 487
 488 static e_surf_resource_state_t cpu_im_get_state(void *cpu)
 489 {
 490   return ((cpu_Cas01_im_t) cpu)->state_current;
 491 }
 492
 493 static double cpu_im_get_speed(void *cpu, double load)
 494 {
 495   return load * (((cpu_Cas01_im_t) cpu)->power_peak);
 496 }
 497
 498 static double cpu_im_get_available_speed(void *cpu)
 499 {
 500   /* number between 0 and 1 */
 501   return ((cpu_Cas01_im_t) cpu)->power_scale;
 502 }
 503
 504 static void cpu_im_action_update_index_heap(void *action, int i)
 505 {
 506   ((surf_action_cpu_Cas01_im_t) action)->index_heap = i;
 507 }
 508
 509 static void cpu_im_finalize(void)
 510 {
 511   void *cpu;
 512   xbt_dict_cursor_t cursor;
 513   char *key;
 514   xbt_dict_foreach(surf_model_resource_set(surf_cpu_model), cursor, key, cpu) {
 515     cpu_Cas01_im_t CPU = cpu;
 516     xbt_swag_free(CPU->action_set);
 517   }
 518
 519   lmm_system_free(cpu_im_maxmin_system);
 520   cpu_im_maxmin_system = NULL;
 521
 522   surf_model_exit(surf_cpu_model);
 523   surf_cpu_model = NULL;
 524
 525   xbt_swag_free(cpu_im_running_action_set_that_does_not_need_being_checked);
 526   cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
 527   xbt_heap_free(cpu_im_action_heap);
 528   xbt_swag_free(cpu_im_modified_cpu);
 529 }
 530
 531 static void surf_cpu_im_model_init_internal(void)
 532 {
 533   s_surf_action_t action;
 534   s_cpu_Cas01_im_t cpu;
 535
 536   surf_cpu_model = surf_model_init();
 537
 538   cpu_im_running_action_set_that_does_not_need_being_checked =
 539     xbt_swag_new(xbt_swag_offset(action, state_hookup));
 540
 541   surf_cpu_model->name = "CPU_IM";
 542
 543   surf_cpu_model->action_unref = cpu_im_action_unref;
 544   surf_cpu_model->action_cancel = cpu_im_action_cancel;
 545   surf_cpu_model->action_state_set = cpu_im_cpu_action_state_set;
 546
 547   surf_cpu_model->model_private->resource_used = cpu_im_resource_used;
 548   surf_cpu_model->model_private->share_resources = cpu_im_share_resources;
 549   surf_cpu_model->model_private->update_actions_state = cpu_im_update_actions_state;
 550   surf_cpu_model->model_private->update_resource_state =
 551     cpu_im_update_resource_state;
 552   surf_cpu_model->model_private->finalize = cpu_im_finalize;
 553
 554   surf_cpu_model->suspend = cpu_im_action_suspend;
 555   surf_cpu_model->resume = cpu_im_action_resume;
 556   surf_cpu_model->is_suspended = cpu_im_action_is_suspended;
 557   surf_cpu_model->set_max_duration = cpu_im_action_set_max_duration;
 558   surf_cpu_model->set_priority = cpu_im_action_set_priority;
 559   surf_cpu_model->get_remains = cpu_im_action_get_remains;
 560
 561   surf_cpu_model->extension.cpu.execute = cpu_im_execute;
 562   surf_cpu_model->extension.cpu.sleep = cpu_im_action_sleep;
 563
 564   surf_cpu_model->extension.cpu.get_state = cpu_im_get_state;
 565   surf_cpu_model->extension.cpu.get_speed = cpu_im_get_speed;
 566   surf_cpu_model->extension.cpu.get_available_speed = cpu_im_get_available_speed;
 567
 568   if (!cpu_im_maxmin_system) {
 569     sg_maxmin_selective_update = 1;
 570     cpu_im_maxmin_system = lmm_system_new();
 571   }
 572   cpu_im_action_heap = xbt_heap_new(8, NULL);
 573   xbt_heap_set_update_callback(cpu_im_action_heap, cpu_im_action_update_index_heap);
 574   cpu_im_modified_cpu = xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
 575 }
 576
 577 /*********************************************************************/
 578 /* Basic sharing model for CPU: that is where all this started... ;) */
 579 /*********************************************************************/
 580 /* @InProceedings{casanova01simgrid, */
 581 /*   author =       "H. Casanova", */
 582 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 583 /*                  and the Grid (CCGrid'01)", */
 584 /*   publisher =    "IEEE Computer Society", */
 585 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 586 /*                  Scheduling", */
 587 /*   year =         "2001", */
 588 /*   month =        may, */
 589 /*   note =         "Available at */
 590 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 591 /* } */
 592 void surf_cpu_model_init_Cas01_im(const char *filename)
 593 {
 594   if (surf_cpu_model)
 595     return;
 596   surf_cpu_im_model_init_internal();
 597   cpu_im_define_callbacks(filename);
 598   xbt_dynar_push(model_list, &surf_cpu_model);
 599 }