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   int core;
  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
  48     cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
  49
  50 static void* cpu_im_create_resource(const char *name, double power_peak,
  51                                  double power_scale,
  52                                  tmgr_trace_t power_trace,
  53                                  int core,
  54                                  e_surf_resource_state_t state_initial,
  55                                  tmgr_trace_t state_trace,
  56                                  xbt_dict_t cpu_properties)
  57 {
  58   cpu_Cas01_im_t cpu = NULL;
  59   s_surf_action_cpu_Cas01_im_t action;
  60
  61   xbt_assert(!surf_cpu_resource_by_name(name),
  62               "Host '%s' declared several times in the platform file",
  63               name);
  64   cpu = (cpu_Cas01_im_t) surf_resource_new(sizeof(s_cpu_Cas01_im_t),
  65           surf_cpu_model, name,cpu_properties);
  66   cpu->power_peak = power_peak;
  67   xbt_assert(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   cpu->core = core;
  73   xbt_assert(core>0,"Invalid number of cores %d",core);
  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->core * cpu->power_scale * cpu->power_peak);
  83
  84   xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, cpu);
  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(sg_platf_host_cbarg_t host)
  92 {
  93         cpu_im_create_resource(host->V_host_id,
  94                           host->V_host_power_peak,
  95                           host->V_host_power_scale,
  96                           host->V_host_power_trace,
  97                           host->V_host_core,
  98                           host->V_host_state_initial,
  99                           host->V_host_state_trace,
 100                           host->properties);
 101 }
 102
 103 static void cpu_im_add_traces_cpu(void)
 104 {
 105   xbt_dict_cursor_t cursor = NULL;
 106   char *trace_name, *elm;
 107   static int called = 0;
 108   if (called)
 109     return;
 110   called = 1;
 111
 112   /* connect all traces relative to hosts */
 113   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 114     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 115     cpu_Cas01_im_t host = surf_cpu_resource_by_name(elm);
 116
 117     xbt_assert(host, "Host %s undefined", elm);
 118     xbt_assert(trace, "Trace %s undefined", trace_name);
 119
 120     host->state_event =
 121         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 122   }
 123
 124   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 125     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 126     cpu_Cas01_im_t host = surf_cpu_resource_by_name(elm);
 127
 128     xbt_assert(host, "Host %s undefined", elm);
 129     xbt_assert(trace, "Trace %s undefined", trace_name);
 130
 131     host->power_event =
 132         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 133   }
 134 }
 135
 136 static void cpu_im_define_callbacks()
 137 {
 138   sg_platf_host_add_cb(parse_cpu_im_init);
 139   sg_platf_postparse_add_cb(cpu_im_add_traces_cpu);
 140 }
 141
 142 static int cpu_im_resource_used(void *resource)
 143 {
 144   return lmm_constraint_used(cpu_im_maxmin_system,
 145                              ((cpu_Cas01_im_t) resource)->constraint);
 146 }
 147
 148 static int cpu_im_action_unref(surf_action_t action)
 149 {
 150   action->refcount--;
 151   if (!action->refcount) {
 152     xbt_swag_remove(action, action->state_set);
 153     if (((surf_action_lmm_t) action)->variable)
 154       lmm_variable_free(cpu_im_maxmin_system,
 155                         ((surf_action_lmm_t) action)->variable);
 156     /* remove from heap */
 157     xbt_heap_remove(cpu_im_action_heap,
 158                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 159     xbt_swag_remove(action,
 160                     ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 161     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 162 #ifdef HAVE_TRACING
 163     if (action->category)
 164       xbt_free(action->category);
 165 #endif
 166     surf_action_free(&action);
 167     return 1;
 168   }
 169   return 0;
 170 }
 171
 172 static void cpu_im_action_cancel(surf_action_t action)
 173 {
 174   surf_action_state_set(action, SURF_ACTION_FAILED);
 175   xbt_heap_remove(cpu_im_action_heap,
 176                   ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 177   xbt_swag_remove(action,
 178                   ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 179   return;
 180 }
 181
 182 static void cpu_im_cpu_action_state_set(surf_action_t action,
 183                                         e_surf_action_state_t state)
 184 {
 185 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 186 /*     if(((surf_action_lmm_t)action)->variable) { */
 187 /*       lmm_variable_disable(cpu_im_maxmin_system, ((surf_action_lmm_t)action)->variable); */
 188 /*       ((surf_action_lmm_t)action)->variable = NULL; */
 189 /*     } */
 190
 191   surf_action_state_set(action, state);
 192   return;
 193 }
 194
 195 static void cpu_im_update_remains(cpu_Cas01_im_t cpu, double now)
 196 {
 197   surf_action_cpu_Cas01_im_t action;
 198
 199   if (cpu->last_update >= now)
 200     return;
 201   xbt_swag_foreach(action, cpu->action_set) {
 202     if (GENERIC_ACTION(action).state_set !=
 203         surf_cpu_model->states.running_action_set)
 204       continue;
 205
 206     /* bogus priority, skip it */
 207     if (GENERIC_ACTION(action).priority <= 0)
 208       continue;
 209
 210     if (GENERIC_ACTION(action).remains > 0) {
 211       double_update(&(GENERIC_ACTION(action).remains),
 212                     lmm_variable_getvalue(GENERIC_LMM_ACTION
 213                                           (action).variable) * (now -
 214                                                                 cpu->last_update));
 215 #ifdef HAVE_TRACING
 216       if (TRACE_is_enabled()) {
 217         TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 218                                         action->
 219                                         generic_lmm_action.generic_action.
 220                                         data, (surf_action_t) action,
 221                                         lmm_variable_getvalue
 222                                         (GENERIC_LMM_ACTION
 223                                          (action).variable),
 224                                         cpu->last_update,
 225                                         now - cpu->last_update);
 226       }
 227 #endif
 228       XBT_DEBUG("Update action(%p) remains %lf", action,
 229              GENERIC_ACTION(action).remains);
 230     }
 231   }
 232   cpu->last_update = now;
 233 }
 234
 235 static double cpu_im_share_resources(double now)
 236 {
 237   surf_action_cpu_Cas01_im_t action;
 238   double min;
 239   double value;
 240   cpu_Cas01_im_t cpu, cpu_next;
 241
 242   xbt_swag_foreach(cpu, cpu_im_modified_cpu)
 243       cpu_im_update_remains(cpu, now);
 244
 245   lmm_solve(cpu_im_maxmin_system);
 246
 247   xbt_swag_foreach_safe(cpu, cpu_next, cpu_im_modified_cpu) {
 248     xbt_swag_foreach(action, cpu->action_set) {
 249       if (GENERIC_ACTION(action).state_set !=
 250           surf_cpu_model->states.running_action_set)
 251         continue;
 252
 253       /* bogus priority, skip it */
 254       if (GENERIC_ACTION(action).priority <= 0)
 255         continue;
 256
 257       min = -1;
 258       value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 259       if (value > 0) {
 260         if (GENERIC_ACTION(action).remains > 0) {
 261           value = GENERIC_ACTION(action).remains / value;
 262           min = now + value;
 263         } else {
 264           value = 0.0;
 265           min = now;
 266         }
 267       }
 268
 269       if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 270           && (min == -1
 271               || GENERIC_ACTION(action).start +
 272               GENERIC_ACTION(action).max_duration < min))
 273         min =
 274             GENERIC_ACTION(action).start +
 275             GENERIC_ACTION(action).max_duration;
 276
 277       XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 278              GENERIC_ACTION(action).start, now + value,
 279              GENERIC_ACTION(action).max_duration);
 280
 281       if (action->index_heap >= 0) {
 282         surf_action_cpu_Cas01_im_t heap_act =
 283             xbt_heap_remove(cpu_im_action_heap, action->index_heap);
 284         if (heap_act != action)
 285           DIE_IMPOSSIBLE;
 286       }
 287       if (min != -1) {
 288         xbt_heap_push(cpu_im_action_heap, action, min);
 289         XBT_DEBUG("Insert at heap action(%p) min %lf", action, min);
 290       }
 291     }
 292     xbt_swag_remove(cpu, cpu_im_modified_cpu);
 293   }
 294   return xbt_heap_size(cpu_im_action_heap) >
 295       0 ? xbt_heap_maxkey(cpu_im_action_heap) - now : -1;
 296 }
 297
 298 static void cpu_im_update_actions_state(double now, double delta)
 299 {
 300   surf_action_cpu_Cas01_im_t action;
 301
 302   while ((xbt_heap_size(cpu_im_action_heap) > 0)
 303          && (double_equals(xbt_heap_maxkey(cpu_im_action_heap), now))) {
 304     action = xbt_heap_pop(cpu_im_action_heap);
 305     XBT_DEBUG("Action %p: finish", action);
 306     GENERIC_ACTION(action).finish = surf_get_clock();
 307     /* set the remains to 0 due to precision problems when updating the remaining amount */
 308 #ifdef HAVE_TRACING
 309     if (TRACE_is_enabled()) {
 310       cpu_Cas01_im_t cpu = ((cpu_Cas01_im_t)(action->cpu));
 311       TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 312           action->generic_lmm_action.generic_action.data,
 313           (surf_action_t) action,
 314           lmm_variable_getvalue (GENERIC_LMM_ACTION(action).variable),
 315           cpu->last_update,
 316           now - cpu->last_update);
 317     }
 318 #endif
 319     GENERIC_ACTION(action).remains = 0;
 320     cpu_im_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 321     cpu_im_update_remains(action->cpu, surf_get_clock());
 322   }
 323 #ifdef HAVE_TRACING
 324   if (TRACE_is_enabled()) {
 325     //defining the last timestamp that we can safely dump to trace file
 326     //without losing the event ascending order (considering all CPU's)
 327     void **data;
 328     cpu_Cas01_im_t cpu;
 329     xbt_lib_cursor_t cursor;
 330     char *key;
 331     double smaller = -1;
 332     xbt_lib_foreach(host_lib, cursor, key, data){
 333       if(data[SURF_CPU_LEVEL]){
 334         cpu = data[SURF_CPU_LEVEL];
 335         if (smaller < 0){
 336           smaller = cpu->last_update;
 337           continue;
 338         }
 339         if (cpu->last_update < smaller){
 340           smaller = cpu->last_update;
 341         }
 342       }
 343     }
 344     if (smaller > 0) {
 345       TRACE_last_timestamp_to_dump = smaller;
 346     }
 347   }
 348 #endif
 349   return;
 350 }
 351
 352 static void cpu_im_update_resource_state(void *id,
 353                                          tmgr_trace_event_t event_type,
 354                                          double value, double date)
 355 {
 356   cpu_Cas01_im_t cpu = id;
 357   lmm_variable_t var = NULL;
 358   lmm_element_t elem = NULL;
 359
 360   if (event_type == cpu->power_event) {
 361     cpu->power_scale = value;
 362     lmm_update_constraint_bound(cpu_im_maxmin_system, cpu->constraint,
 363                                 cpu->core * cpu->power_scale * cpu->power_peak);
 364 #ifdef HAVE_TRACING
 365     TRACE_surf_host_set_power(date, cpu->generic_resource.name,
 366                               cpu->core * cpu->power_scale * cpu->power_peak);
 367 #endif
 368     while ((var = lmm_get_var_from_cnst
 369             (cpu_im_maxmin_system, cpu->constraint, &elem))) {
 370         surf_action_cpu_Cas01_im_t action = lmm_variable_id(var);
 371         lmm_update_variable_bound(cpu_im_maxmin_system, action->generic_lmm_action.variable,
 372                                   cpu->power_scale * cpu->power_peak);
 373     }
 374     xbt_swag_insert(cpu, cpu_im_modified_cpu);
 375     if (tmgr_trace_event_free(event_type))
 376       cpu->power_event = NULL;
 377   } else if (event_type == cpu->state_event) {
 378     if (value > 0)
 379       cpu->state_current = SURF_RESOURCE_ON;
 380     else {
 381       lmm_constraint_t cnst = cpu->constraint;
 382       lmm_variable_t var = NULL;
 383       lmm_element_t elem = NULL;
 384
 385       cpu->state_current = SURF_RESOURCE_OFF;
 386
 387       while ((var =
 388               lmm_get_var_from_cnst(cpu_im_maxmin_system, cnst, &elem))) {
 389         surf_action_t action = lmm_variable_id(var);
 390
 391         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 392             surf_action_state_get(action) == SURF_ACTION_READY ||
 393             surf_action_state_get(action) ==
 394             SURF_ACTION_NOT_IN_THE_SYSTEM) {
 395           action->finish = date;
 396           cpu_im_cpu_action_state_set(action, SURF_ACTION_FAILED);
 397         }
 398       }
 399     }
 400     if (tmgr_trace_event_free(event_type))
 401       cpu->state_event = NULL;
 402   } else {
 403     XBT_CRITICAL("Unknown event ! \n");
 404     xbt_abort();
 405   }
 406
 407   return;
 408 }
 409
 410 static surf_action_t cpu_im_execute(void *cpu, double size)
 411 {
 412   surf_action_cpu_Cas01_im_t action = NULL;
 413   cpu_Cas01_im_t CPU = cpu;
 414
 415   XBT_IN("(%s,%g)", surf_resource_name(CPU), size);
 416   action =
 417       surf_action_new(sizeof(s_surf_action_cpu_Cas01_im_t), size,
 418                       surf_cpu_model,
 419                       CPU->state_current != SURF_RESOURCE_ON);
 420
 421   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 422                                                    calloc but it seems to help valgrind... */
 423
 424   GENERIC_LMM_ACTION(action).variable =
 425       lmm_variable_new(cpu_im_maxmin_system, action,
 426                        GENERIC_ACTION(action).priority, CPU->power_scale * CPU->power_peak, 1);
 427   action->index_heap = -1;
 428   action->cpu = CPU;
 429   xbt_swag_insert(CPU, cpu_im_modified_cpu);
 430   xbt_swag_insert(action, CPU->action_set);
 431   lmm_expand(cpu_im_maxmin_system, CPU->constraint,
 432              GENERIC_LMM_ACTION(action).variable, 1.0);
 433   XBT_OUT();
 434   return (surf_action_t) action;
 435 }
 436
 437 static surf_action_t cpu_im_action_sleep(void *cpu, double duration)
 438 {
 439   surf_action_cpu_Cas01_im_t action = NULL;
 440
 441   if (duration > 0)
 442     duration = MAX(duration, MAXMIN_PRECISION);
 443
 444   XBT_IN("(%s,%g)", surf_resource_name(cpu), duration);
 445   action = (surf_action_cpu_Cas01_im_t) cpu_im_execute(cpu, 1.0);
 446   GENERIC_ACTION(action).max_duration = duration;
 447   GENERIC_LMM_ACTION(action).suspended = 2;
 448   if (duration == NO_MAX_DURATION) {
 449     /* Move to the *end* of the corresponding action set. This convention
 450        is used to speed up update_resource_state  */
 451     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 452     ((surf_action_t) action)->state_set =
 453         cpu_im_running_action_set_that_does_not_need_being_checked;
 454     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 455   }
 456
 457   lmm_update_variable_weight(cpu_im_maxmin_system,
 458                              GENERIC_LMM_ACTION(action).variable, 0.0);
 459   xbt_swag_insert(cpu, cpu_im_modified_cpu);
 460   XBT_OUT();
 461   return (surf_action_t) action;
 462 }
 463
 464 static void cpu_im_action_suspend(surf_action_t action)
 465 {
 466   XBT_IN("(%p)", action);
 467   if (((surf_action_lmm_t) action)->suspended != 2) {
 468     lmm_update_variable_weight(cpu_im_maxmin_system,
 469                                ((surf_action_lmm_t) action)->variable,
 470                                0.0);
 471     ((surf_action_lmm_t) action)->suspended = 1;
 472     xbt_heap_remove(cpu_im_action_heap,
 473                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 474     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 475   }
 476   XBT_OUT();
 477 }
 478
 479 static void cpu_im_action_resume(surf_action_t action)
 480 {
 481
 482   XBT_IN("(%p)", action);
 483   if (((surf_action_lmm_t) action)->suspended != 2) {
 484     lmm_update_variable_weight(cpu_im_maxmin_system,
 485                                ((surf_action_lmm_t) action)->variable,
 486                                action->priority);
 487     ((surf_action_lmm_t) action)->suspended = 0;
 488     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 489   }
 490   XBT_OUT();
 491 }
 492
 493 static int cpu_im_action_is_suspended(surf_action_t action)
 494 {
 495   return (((surf_action_lmm_t) action)->suspended == 1);
 496 }
 497
 498 static void cpu_im_action_set_max_duration(surf_action_t action,
 499                                            double duration)
 500 {
 501   XBT_IN("(%p,%g)", action, duration);
 502
 503   action->max_duration = duration;
 504   /* insert cpu in modified_cpu set to notice the max duration change */
 505   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 506   XBT_OUT();
 507 }
 508
 509 static void cpu_im_action_set_priority(surf_action_t action,
 510                                        double priority)
 511 {
 512   XBT_IN("(%p,%g)", action, priority);
 513   action->priority = priority;
 514   lmm_update_variable_weight(cpu_im_maxmin_system,
 515                              ((surf_action_lmm_t) action)->variable,
 516                              priority);
 517
 518   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 519   XBT_OUT();
 520 }
 521
 522 #ifdef HAVE_TRACING
 523 static void cpu_im_action_set_category(surf_action_t action,
 524                                        const char *category)
 525 {
 526   XBT_IN("(%p,%s)", action, category);
 527   action->category = xbt_strdup (category);
 528   XBT_OUT();
 529 }
 530 #endif
 531
 532 static double cpu_im_action_get_remains(surf_action_t action)
 533 {
 534   XBT_IN("(%p)", action);
 535   /* update remains before return it */
 536   cpu_im_update_remains(ACTION_GET_CPU(action), surf_get_clock());
 537   return action->remains;
 538   XBT_OUT();
 539 }
 540
 541 static e_surf_resource_state_t cpu_im_get_state(void *cpu)
 542 {
 543   return ((cpu_Cas01_im_t) cpu)->state_current;
 544 }
 545
 546 static double cpu_im_get_speed(void *cpu, double load)
 547 {
 548   return load * (((cpu_Cas01_im_t) cpu)->power_peak);
 549 }
 550
 551 static double cpu_im_get_available_speed(void *cpu)
 552 {
 553   /* number between 0 and 1 */
 554   return ((cpu_Cas01_im_t) cpu)->power_scale;
 555 }
 556
 557 static void cpu_im_action_update_index_heap(void *action, int i)
 558 {
 559   ((surf_action_cpu_Cas01_im_t) action)->index_heap = i;
 560 }
 561
 562 static void cpu_im_finalize(void)
 563 {
 564   void **cpu;
 565   xbt_lib_cursor_t cursor;
 566   char *key;
 567
 568   xbt_lib_foreach(host_lib, cursor, key, cpu){
 569           if(cpu[SURF_CPU_LEVEL])
 570           {
 571                     cpu_Cas01_im_t CPU = cpu[SURF_CPU_LEVEL];
 572                     xbt_swag_free(CPU->action_set);
 573           }
 574   }
 575
 576   lmm_system_free(cpu_im_maxmin_system);
 577   cpu_im_maxmin_system = NULL;
 578
 579   surf_model_exit(surf_cpu_model);
 580   surf_cpu_model = NULL;
 581
 582   xbt_swag_free
 583       (cpu_im_running_action_set_that_does_not_need_being_checked);
 584   cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
 585   xbt_heap_free(cpu_im_action_heap);
 586   xbt_swag_free(cpu_im_modified_cpu);
 587 }
 588
 589 static void surf_cpu_im_model_init_internal(void)
 590 {
 591   s_surf_action_t action;
 592   s_cpu_Cas01_im_t cpu;
 593
 594   surf_cpu_model = surf_model_init();
 595
 596   cpu_im_running_action_set_that_does_not_need_being_checked =
 597       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 598
 599   surf_cpu_model->name = "CPU_IM";
 600
 601   surf_cpu_model->action_unref = cpu_im_action_unref;
 602   surf_cpu_model->action_cancel = cpu_im_action_cancel;
 603   surf_cpu_model->action_state_set = cpu_im_cpu_action_state_set;
 604
 605   surf_cpu_model->model_private->resource_used = cpu_im_resource_used;
 606   surf_cpu_model->model_private->share_resources = cpu_im_share_resources;
 607   surf_cpu_model->model_private->update_actions_state =
 608       cpu_im_update_actions_state;
 609   surf_cpu_model->model_private->update_resource_state =
 610       cpu_im_update_resource_state;
 611   surf_cpu_model->model_private->finalize = cpu_im_finalize;
 612
 613   surf_cpu_model->suspend = cpu_im_action_suspend;
 614   surf_cpu_model->resume = cpu_im_action_resume;
 615   surf_cpu_model->is_suspended = cpu_im_action_is_suspended;
 616   surf_cpu_model->set_max_duration = cpu_im_action_set_max_duration;
 617   surf_cpu_model->set_priority = cpu_im_action_set_priority;
 618 #ifdef HAVE_TRACING
 619   surf_cpu_model->set_category = cpu_im_action_set_category;
 620 #endif
 621   surf_cpu_model->get_remains = cpu_im_action_get_remains;
 622
 623   surf_cpu_model->extension.cpu.execute = cpu_im_execute;
 624   surf_cpu_model->extension.cpu.sleep = cpu_im_action_sleep;
 625
 626   surf_cpu_model->extension.cpu.get_state = cpu_im_get_state;
 627   surf_cpu_model->extension.cpu.get_speed = cpu_im_get_speed;
 628   surf_cpu_model->extension.cpu.get_available_speed =
 629       cpu_im_get_available_speed;
 630   surf_cpu_model->extension.cpu.create_resource = cpu_im_create_resource;
 631   surf_cpu_model->extension.cpu.add_traces = cpu_im_add_traces_cpu;
 632
 633   if (!cpu_im_maxmin_system) {
 634     sg_maxmin_selective_update = 1;
 635     cpu_im_maxmin_system = lmm_system_new();
 636   }
 637   cpu_im_action_heap = xbt_heap_new(8, NULL);
 638   xbt_heap_set_update_callback(cpu_im_action_heap,
 639                                cpu_im_action_update_index_heap);
 640   cpu_im_modified_cpu =
 641       xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
 642 }
 643
 644 /*********************************************************************/
 645 /* Basic sharing model for CPU: that is where all this started... ;) */
 646 /*********************************************************************/
 647 /* @InProceedings{casanova01simgrid, */
 648 /*   author =       "H. Casanova", */
 649 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 650 /*                  and the Grid (CCGrid'01)", */
 651 /*   publisher =    "IEEE Computer Society", */
 652 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 653 /*                  Scheduling", */
 654 /*   year =         "2001", */
 655 /*   month =        may, */
 656 /*   note =         "Available at */
 657 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 658 /* } */
 659 void surf_cpu_model_init_Cas01_im()
 660 {
 661   if (surf_cpu_model)
 662     return;
 663   surf_cpu_im_model_init_internal();
 664   cpu_im_define_callbacks();
 665   xbt_dynar_push(model_list, &surf_cpu_model);
 666 }