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   cpu_Cas01_im_t cpu = NULL;
  56   s_surf_action_cpu_Cas01_im_t action;
  57   cpu = xbt_new0(s_cpu_Cas01_im_t, 1);
  58
  59   #ifdef HAVE_TRACING
  60   TRACE_surf_host_declaration (name, power_scale * power_peak);
  61   #endif
  62
  63   xbt_assert1(!surf_model_resource_by_name(surf_cpu_model, name),
  64               "Host '%s' declared several times in the platform file", name);
  65   cpu->generic_resource.model = surf_cpu_model;
  66   cpu->generic_resource.name = name;
  67   cpu->generic_resource.properties = cpu_properties;
  68   cpu->power_peak = power_peak;
  69   xbt_assert0(cpu->power_peak > 0, "Power has to be >0");
  70   cpu->power_scale = power_scale;
  71   if (power_trace)
  72     cpu->power_event =
  73       tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
  74
  75   cpu->state_current = state_initial;
  76   if (state_trace)
  77     cpu->state_event =
  78       tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
  79
  80   cpu->constraint =
  81     lmm_constraint_new(cpu_im_maxmin_system, cpu,
  82                        cpu->power_scale * cpu->power_peak);
  83
  84   xbt_dict_set(surf_model_resource_set(surf_cpu_model), name, cpu,
  85                surf_resource_free);
  86   cpu->action_set = xbt_swag_new(xbt_swag_offset(action, cpu_list_hookup));
  87
  88   return cpu;
  89 }
  90
  91
  92 static void parse_cpu_im_init(void)
  93 {
  94   double power_peak = 0.0;
  95   double power_scale = 0.0;
  96   tmgr_trace_t power_trace = NULL;
  97   e_surf_resource_state_t state_initial = SURF_RESOURCE_OFF;
  98   tmgr_trace_t state_trace = NULL;
  99
 100   power_peak = get_cpu_power(A_surfxml_host_power);
 101   surf_parse_get_double(&power_scale, A_surfxml_host_availability);
 102   power_trace = tmgr_trace_new(A_surfxml_host_availability_file);
 103
 104   xbt_assert0((A_surfxml_host_state == A_surfxml_host_state_ON) ||
 105               (A_surfxml_host_state == A_surfxml_host_state_OFF),
 106               "Invalid state");
 107   if (A_surfxml_host_state == A_surfxml_host_state_ON)
 108     state_initial = SURF_RESOURCE_ON;
 109   if (A_surfxml_host_state == A_surfxml_host_state_OFF)
 110     state_initial = SURF_RESOURCE_OFF;
 111   state_trace = tmgr_trace_new(A_surfxml_host_state_file);
 112
 113   current_property_set = xbt_dict_new();
 114   cpu_im_new(xbt_strdup(A_surfxml_host_id), power_peak, power_scale,
 115           power_trace, state_initial, state_trace, current_property_set);
 116
 117 }
 118
 119 static void cpu_im_add_traces_cpu(void)
 120 {
 121   xbt_dict_cursor_t cursor = NULL;
 122   char *trace_name, *elm;
 123
 124   static int called = 0;
 125
 126   if (called)
 127     return;
 128   called = 1;
 129
 130
 131   /* connect all traces relative to hosts */
 132   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 133     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 134     cpu_Cas01_im_t host = surf_model_resource_by_name(surf_cpu_model, elm);
 135
 136     xbt_assert1(host, "Host %s undefined", elm);
 137     xbt_assert1(trace, "Trace %s undefined", trace_name);
 138
 139     host->state_event = tmgr_history_add_trace(history, trace, 0.0, 0, host);
 140   }
 141
 142   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 143     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 144     cpu_Cas01_im_t host = surf_model_resource_by_name(surf_cpu_model, elm);
 145
 146     xbt_assert1(host, "Host %s undefined", elm);
 147     xbt_assert1(trace, "Trace %s undefined", trace_name);
 148
 149     host->power_event = tmgr_history_add_trace(history, trace, 0.0, 0, host);
 150   }
 151 }
 152
 153 static void cpu_im_define_callbacks(const char *file)
 154 {
 155
 156   surf_parse_reset_parser();
 157   surfxml_add_callback(STag_surfxml_host_cb_list, parse_cpu_im_init);
 158   surfxml_add_callback(ETag_surfxml_platform_cb_list, &cpu_im_add_traces_cpu);
 159 }
 160
 161 static int cpu_im_resource_used(void *resource_id)
 162 {
 163   return lmm_constraint_used(cpu_im_maxmin_system,
 164                              ((cpu_Cas01_im_t) resource_id)->constraint);
 165 }
 166
 167 static int cpu_im_action_unref(surf_action_t action)
 168 {
 169   action->refcount--;
 170   if (!action->refcount) {
 171     xbt_swag_remove(action, action->state_set);
 172     if (((surf_action_lmm_t) action)->variable)
 173       lmm_variable_free(cpu_im_maxmin_system,
 174                         ((surf_action_lmm_t) action)->variable);
 175     /* remove from heap */
 176     xbt_heap_remove(cpu_im_action_heap,
 177                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 178     xbt_swag_remove(action,
 179                     ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 180     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 181     free(action);
 182     return 1;
 183   }
 184   return 0;
 185 }
 186
 187 static void cpu_im_action_cancel(surf_action_t action)
 188 {
 189   surf_action_state_set(action, SURF_ACTION_FAILED);
 190   xbt_heap_remove(cpu_im_action_heap,
 191                   ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 192   xbt_swag_remove(action,
 193                   ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 194   return;
 195 }
 196
 197 static void cpu_im_cpu_action_state_set(surf_action_t action,
 198                                  e_surf_action_state_t state)
 199 {
 200 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 201 /*     if(((surf_action_lmm_t)action)->variable) { */
 202 /*       lmm_variable_disable(cpu_im_maxmin_system, ((surf_action_lmm_t)action)->variable); */
 203 /*       ((surf_action_lmm_t)action)->variable = NULL; */
 204 /*     } */
 205
 206   surf_action_state_set(action, state);
 207   return;
 208 }
 209
 210 static void cpu_im_update_remains(cpu_Cas01_im_t cpu, double now)
 211 {
 212   surf_action_cpu_Cas01_im_t action;
 213
 214   if (cpu->last_update >= now)
 215     return;
 216   xbt_swag_foreach(action, cpu->action_set) {
 217     if (GENERIC_ACTION(action).state_set !=
 218         surf_cpu_model->states.running_action_set)
 219       continue;
 220
 221     /* bogus priority, skip it */
 222     if (GENERIC_ACTION(action).priority <= 0)
 223       continue;
 224
 225     if (GENERIC_ACTION(action).remains > 0) {
 226       double_update(&(GENERIC_ACTION(action).remains),
 227                     lmm_variable_getvalue(GENERIC_LMM_ACTION
 228                                           (action).variable) * (now -
 229                                                                 cpu->last_update));
 230 #ifdef HAVE_TRACING
 231       TRACE_surf_host_set_utilization (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_host_set_utilization (((cpu_Cas01_im_t)(action->cpu))->generic_resource.name,
 314               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);
 315 #endif
 316     GENERIC_ACTION(action).remains = 0;
 317     cpu_im_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 318     cpu_im_update_remains(action->cpu, surf_get_clock());
 319   }
 320   return;
 321 }
 322
 323 static void cpu_im_update_resource_state(void *id,
 324                                   tmgr_trace_event_t event_type,
 325                                   double value, double date)
 326 {
 327   cpu_Cas01_im_t cpu = id;
 328
 329   if (event_type == cpu->power_event) {
 330     cpu->power_scale = value;
 331     lmm_update_constraint_bound(cpu_im_maxmin_system, cpu->constraint,
 332                                 cpu->power_scale * cpu->power_peak);
 333 #ifdef HAVE_TRACING
 334     TRACE_surf_host_set_power (date, cpu->generic_resource.name, cpu->power_scale * cpu->power_peak);
 335 #endif
 336     xbt_swag_insert(cpu, cpu_im_modified_cpu);
 337     if (tmgr_trace_event_free(event_type))
 338       cpu->power_event = NULL;
 339   } else if (event_type == cpu->state_event) {
 340     if (value > 0)
 341       cpu->state_current = SURF_RESOURCE_ON;
 342     else {
 343       lmm_constraint_t cnst = cpu->constraint;
 344       lmm_variable_t var = NULL;
 345       lmm_element_t elem = NULL;
 346
 347       cpu->state_current = SURF_RESOURCE_OFF;
 348
 349       while ((var = lmm_get_var_from_cnst(cpu_im_maxmin_system, cnst, &elem))) {
 350         surf_action_t action = lmm_variable_id(var);
 351
 352         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 353             surf_action_state_get(action) == SURF_ACTION_READY ||
 354             surf_action_state_get(action) == SURF_ACTION_NOT_IN_THE_SYSTEM) {
 355           action->finish = date;
 356           cpu_im_cpu_action_state_set(action, SURF_ACTION_FAILED);
 357         }
 358       }
 359     }
 360     if (tmgr_trace_event_free(event_type))
 361       cpu->state_event = NULL;
 362   } else {
 363     CRITICAL0("Unknown event ! \n");
 364     xbt_abort();
 365   }
 366
 367   return;
 368 }
 369
 370 static surf_action_t cpu_im_execute(void *cpu, double size)
 371 {
 372   surf_action_cpu_Cas01_im_t action = NULL;
 373   cpu_Cas01_im_t CPU = cpu;
 374
 375   XBT_IN2("(%s,%g)", surf_resource_name(CPU), size);
 376   action =
 377     surf_action_new(sizeof(s_surf_action_cpu_Cas01_im_t), size,
 378                     surf_cpu_model, CPU->state_current != SURF_RESOURCE_ON);
 379
 380   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 381                                                    calloc but it seems to help valgrind... */
 382
 383   GENERIC_LMM_ACTION(action).variable =
 384     lmm_variable_new(cpu_im_maxmin_system, action,
 385                      GENERIC_ACTION(action).priority, -1.0, 1);
 386   action->index_heap = -1;
 387   action->cpu = CPU;
 388   xbt_swag_insert(CPU, cpu_im_modified_cpu);
 389   xbt_swag_insert(action, CPU->action_set);
 390   lmm_expand(cpu_im_maxmin_system, CPU->constraint,
 391              GENERIC_LMM_ACTION(action).variable, 1.0);
 392   XBT_OUT;
 393   return (surf_action_t) action;
 394 }
 395
 396 static surf_action_t cpu_im_action_sleep(void *cpu, double duration)
 397 {
 398   surf_action_cpu_Cas01_im_t action = NULL;
 399
 400   if (duration > 0)
 401     duration = MAX(duration, MAXMIN_PRECISION);
 402
 403   XBT_IN2("(%s,%g)", surf_resource_name(cpu), duration);
 404   action = (surf_action_cpu_Cas01_im_t) cpu_im_execute(cpu, 1.0);
 405   GENERIC_ACTION(action).max_duration = duration;
 406   GENERIC_LMM_ACTION(action).suspended = 2;
 407   if (duration == NO_MAX_DURATION) {
 408     /* Move to the *end* of the corresponding action set. This convention
 409        is used to speed up update_resource_state  */
 410     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 411     ((surf_action_t) action)->state_set =
 412       cpu_im_running_action_set_that_does_not_need_being_checked;
 413     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 414   }
 415
 416   lmm_update_variable_weight(cpu_im_maxmin_system,
 417                              GENERIC_LMM_ACTION(action).variable, 0.0);
 418   xbt_swag_insert(cpu, cpu_im_modified_cpu);
 419   XBT_OUT;
 420   return (surf_action_t) action;
 421 }
 422
 423 static void cpu_im_action_suspend(surf_action_t action)
 424 {
 425   XBT_IN1("(%p)", action);
 426   if (((surf_action_lmm_t) action)->suspended != 2) {
 427     lmm_update_variable_weight(cpu_im_maxmin_system,
 428                                ((surf_action_lmm_t) action)->variable, 0.0);
 429     ((surf_action_lmm_t) action)->suspended = 1;
 430     xbt_heap_remove(cpu_im_action_heap,
 431                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 432     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 433   }
 434   XBT_OUT;
 435 }
 436
 437 static void cpu_im_action_resume(surf_action_t action)
 438 {
 439
 440   XBT_IN1("(%p)", action);
 441   if (((surf_action_lmm_t) action)->suspended != 2) {
 442     lmm_update_variable_weight(cpu_im_maxmin_system,
 443                                ((surf_action_lmm_t) action)->variable,
 444                                action->priority);
 445     ((surf_action_lmm_t) action)->suspended = 0;
 446     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 447   }
 448   XBT_OUT;
 449 }
 450
 451 static int cpu_im_action_is_suspended(surf_action_t action)
 452 {
 453   return (((surf_action_lmm_t) action)->suspended == 1);
 454 }
 455
 456 static void cpu_im_action_set_max_duration(surf_action_t action, double duration)
 457 {
 458   XBT_IN2("(%p,%g)", action, duration);
 459
 460   action->max_duration = duration;
 461   /* insert cpu in modified_cpu set to notice the max duration change */
 462   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 463   XBT_OUT;
 464 }
 465
 466 static void cpu_im_action_set_priority(surf_action_t action, double priority)
 467 {
 468   XBT_IN2("(%p,%g)", action, priority);
 469   action->priority = priority;
 470   lmm_update_variable_weight(cpu_im_maxmin_system,
 471                              ((surf_action_lmm_t) action)->variable,
 472                              priority);
 473
 474   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 475   XBT_OUT;
 476 }
 477
 478 static double cpu_im_action_get_remains(surf_action_t action)
 479 {
 480   XBT_IN1("(%p)", action);
 481   /* update remains before return it */
 482   cpu_im_update_remains(ACTION_GET_CPU(action), surf_get_clock());
 483   return action->remains;
 484   XBT_OUT;
 485 }
 486
 487 static e_surf_resource_state_t cpu_im_get_state(void *cpu)
 488 {
 489   return ((cpu_Cas01_im_t) cpu)->state_current;
 490 }
 491
 492 static double cpu_im_get_speed(void *cpu, double load)
 493 {
 494   return load * (((cpu_Cas01_im_t) cpu)->power_peak);
 495 }
 496
 497 static double cpu_im_get_available_speed(void *cpu)
 498 {
 499   /* number between 0 and 1 */
 500   return ((cpu_Cas01_im_t) cpu)->power_scale;
 501 }
 502
 503 static void cpu_im_action_update_index_heap(void *action, int i)
 504 {
 505   ((surf_action_cpu_Cas01_im_t) action)->index_heap = i;
 506 }
 507 static void cpu_im_create_resource(char *name, double power_peak,
 508         double power_scale,
 509         tmgr_trace_t power_trace,
 510         e_surf_resource_state_t state_initial,
 511         tmgr_trace_t state_trace,
 512         xbt_dict_t cpu_properties)
 513 {
 514         cpu_im_new(name,power_peak,power_scale,power_trace,
 515                                           state_initial,state_trace,cpu_properties);
 516 }
 517
 518 static void cpu_im_finalize(void)
 519 {
 520   void *cpu;
 521   xbt_dict_cursor_t cursor;
 522   char *key;
 523   xbt_dict_foreach(surf_model_resource_set(surf_cpu_model), cursor, key, cpu) {
 524     cpu_Cas01_im_t CPU = cpu;
 525     xbt_swag_free(CPU->action_set);
 526   }
 527
 528   lmm_system_free(cpu_im_maxmin_system);
 529   cpu_im_maxmin_system = NULL;
 530
 531   surf_model_exit(surf_cpu_model);
 532   surf_cpu_model = NULL;
 533
 534   xbt_swag_free(cpu_im_running_action_set_that_does_not_need_being_checked);
 535   cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
 536   xbt_heap_free(cpu_im_action_heap);
 537   xbt_swag_free(cpu_im_modified_cpu);
 538 }
 539
 540 static void surf_cpu_im_model_init_internal(void)
 541 {
 542   s_surf_action_t action;
 543   s_cpu_Cas01_im_t cpu;
 544
 545   surf_cpu_model = surf_model_init();
 546
 547   cpu_im_running_action_set_that_does_not_need_being_checked =
 548     xbt_swag_new(xbt_swag_offset(action, state_hookup));
 549
 550   surf_cpu_model->name = "CPU_IM";
 551
 552   surf_cpu_model->action_unref = cpu_im_action_unref;
 553   surf_cpu_model->action_cancel = cpu_im_action_cancel;
 554   surf_cpu_model->action_state_set = cpu_im_cpu_action_state_set;
 555
 556   surf_cpu_model->model_private->resource_used = cpu_im_resource_used;
 557   surf_cpu_model->model_private->share_resources = cpu_im_share_resources;
 558   surf_cpu_model->model_private->update_actions_state = cpu_im_update_actions_state;
 559   surf_cpu_model->model_private->update_resource_state =
 560     cpu_im_update_resource_state;
 561   surf_cpu_model->model_private->finalize = cpu_im_finalize;
 562
 563   surf_cpu_model->suspend = cpu_im_action_suspend;
 564   surf_cpu_model->resume = cpu_im_action_resume;
 565   surf_cpu_model->is_suspended = cpu_im_action_is_suspended;
 566   surf_cpu_model->set_max_duration = cpu_im_action_set_max_duration;
 567   surf_cpu_model->set_priority = cpu_im_action_set_priority;
 568   surf_cpu_model->get_remains = cpu_im_action_get_remains;
 569
 570   surf_cpu_model->extension.cpu.execute = cpu_im_execute;
 571   surf_cpu_model->extension.cpu.sleep = cpu_im_action_sleep;
 572
 573   surf_cpu_model->extension.cpu.get_state = cpu_im_get_state;
 574   surf_cpu_model->extension.cpu.get_speed = cpu_im_get_speed;
 575   surf_cpu_model->extension.cpu.get_available_speed = cpu_im_get_available_speed;
 576   surf_cpu_model->extension.cpu.create_resource = cpu_im_create_resource;
 577
 578   if (!cpu_im_maxmin_system) {
 579     sg_maxmin_selective_update = 1;
 580     cpu_im_maxmin_system = lmm_system_new();
 581   }
 582   cpu_im_action_heap = xbt_heap_new(8, NULL);
 583   xbt_heap_set_update_callback(cpu_im_action_heap, cpu_im_action_update_index_heap);
 584   cpu_im_modified_cpu = xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
 585 }
 586
 587 /*********************************************************************/
 588 /* Basic sharing model for CPU: that is where all this started... ;) */
 589 /*********************************************************************/
 590 /* @InProceedings{casanova01simgrid, */
 591 /*   author =       "H. Casanova", */
 592 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 593 /*                  and the Grid (CCGrid'01)", */
 594 /*   publisher =    "IEEE Computer Society", */
 595 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 596 /*                  Scheduling", */
 597 /*   year =         "2001", */
 598 /*   month =        may, */
 599 /*   note =         "Available at */
 600 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 601 /* } */
 602 void surf_cpu_model_init_Cas01_im(const char *filename)
 603 {
 604   if (surf_cpu_model)
 605     return;
 606   surf_cpu_im_model_init_internal();
 607   cpu_im_define_callbacks(filename);
 608   xbt_dynar_push(model_list, &surf_cpu_model);
 609 }