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   surf_parse_reset_parser();
 156   surfxml_add_callback(STag_surfxml_host_cb_list, parse_cpu_im_init);
 157   surfxml_add_callback(ETag_surfxml_platform_cb_list, &cpu_im_add_traces_cpu);
 158 }
 159
 160 static int cpu_im_resource_used(void *resource_id)
 161 {
 162   return lmm_constraint_used(cpu_im_maxmin_system,
 163                              ((cpu_Cas01_im_t) resource_id)->constraint);
 164 }
 165
 166 static int cpu_im_action_unref(surf_action_t action)
 167 {
 168   action->refcount--;
 169   if (!action->refcount) {
 170     xbt_swag_remove(action, action->state_set);
 171     if (((surf_action_lmm_t) action)->variable)
 172       lmm_variable_free(cpu_im_maxmin_system,
 173                         ((surf_action_lmm_t) action)->variable);
 174     /* remove from heap */
 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     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 180     free(action);
 181     return 1;
 182   }
 183   return 0;
 184 }
 185
 186 static void cpu_im_action_cancel(surf_action_t action)
 187 {
 188   surf_action_state_set(action, SURF_ACTION_FAILED);
 189   xbt_heap_remove(cpu_im_action_heap,
 190                   ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 191   xbt_swag_remove(action,
 192                   ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 193   return;
 194 }
 195
 196 static void cpu_im_cpu_action_state_set(surf_action_t action,
 197                                  e_surf_action_state_t state)
 198 {
 199 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 200 /*     if(((surf_action_lmm_t)action)->variable) { */
 201 /*       lmm_variable_disable(cpu_im_maxmin_system, ((surf_action_lmm_t)action)->variable); */
 202 /*       ((surf_action_lmm_t)action)->variable = NULL; */
 203 /*     } */
 204
 205   surf_action_state_set(action, state);
 206   return;
 207 }
 208
 209 static void cpu_im_update_remains(cpu_Cas01_im_t cpu, double now)
 210 {
 211   surf_action_cpu_Cas01_im_t action;
 212
 213   if (cpu->last_update >= now)
 214     return;
 215   xbt_swag_foreach(action, cpu->action_set) {
 216     if (GENERIC_ACTION(action).state_set !=
 217         surf_cpu_model->states.running_action_set)
 218       continue;
 219
 220     /* bogus priority, skip it */
 221     if (GENERIC_ACTION(action).priority <= 0)
 222       continue;
 223
 224     if (GENERIC_ACTION(action).remains > 0) {
 225       double_update(&(GENERIC_ACTION(action).remains),
 226                     lmm_variable_getvalue(GENERIC_LMM_ACTION
 227                                           (action).variable) * (now -
 228                                                                 cpu->last_update));
 229 #ifdef HAVE_TRACING
 230       TRACE_surf_host_set_utilization (cpu->generic_resource.name,
 231                 action->generic_lmm_action.generic_action.data, lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable), cpu->last_update, now-cpu->last_update);
 232 #endif
 233       DEBUG2("Update action(%p) remains %lf", action,
 234              GENERIC_ACTION(action).remains);
 235     }
 236   }
 237   cpu->last_update = now;
 238 }
 239
 240 static double cpu_im_share_resources(double now)
 241 {
 242   surf_action_cpu_Cas01_im_t action;
 243   double min;
 244   double value;
 245   cpu_Cas01_im_t cpu, cpu_next;
 246
 247   xbt_swag_foreach(cpu, cpu_im_modified_cpu)
 248     cpu_im_update_remains(cpu, now);
 249
 250   lmm_solve(cpu_im_maxmin_system);
 251
 252   xbt_swag_foreach_safe(cpu, cpu_next, cpu_im_modified_cpu) {
 253     xbt_swag_foreach(action, cpu->action_set) {
 254       if (GENERIC_ACTION(action).state_set !=
 255           surf_cpu_model->states.running_action_set)
 256         continue;
 257
 258       /* bogus priority, skip it */
 259       if (GENERIC_ACTION(action).priority <= 0)
 260         continue;
 261
 262       min = -1;
 263       value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 264       if (value > 0) {
 265         if (GENERIC_ACTION(action).remains > 0)
 266           value = GENERIC_ACTION(action).remains / value;
 267         else
 268           value = 0.0;
 269       }
 270       if (value > 0)
 271         min = now + value;
 272
 273       if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 274           && (min == -1
 275               || GENERIC_ACTION(action).start +
 276               GENERIC_ACTION(action).max_duration < min))
 277         min =
 278           GENERIC_ACTION(action).start + GENERIC_ACTION(action).max_duration;
 279
 280       DEBUG4("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 281              GENERIC_ACTION(action).start, now + value,
 282              GENERIC_ACTION(action).max_duration);
 283
 284       if (action->index_heap >= 0) {
 285         surf_action_cpu_Cas01_im_t heap_act =
 286           xbt_heap_remove(cpu_im_action_heap, action->index_heap);
 287         if (heap_act != action)
 288           DIE_IMPOSSIBLE;
 289       }
 290       if (min != -1) {
 291         xbt_heap_push(cpu_im_action_heap, action, min);
 292         DEBUG2("Insert at heap action(%p) min %lf", action, min);
 293       }
 294     }
 295     xbt_swag_remove(cpu, cpu_im_modified_cpu);
 296   }
 297   return xbt_heap_size(cpu_im_action_heap) >
 298     0 ? xbt_heap_maxkey(cpu_im_action_heap) - now : -1;
 299 }
 300
 301 static void cpu_im_update_actions_state(double now, double delta)
 302 {
 303   surf_action_cpu_Cas01_im_t action;
 304
 305   while ((xbt_heap_size(cpu_im_action_heap) > 0)
 306          && (double_equals(xbt_heap_maxkey(cpu_im_action_heap), now))) {
 307     action = xbt_heap_pop(cpu_im_action_heap);
 308     DEBUG1("Action %p: finish", action);
 309     GENERIC_ACTION(action).finish = surf_get_clock();
 310     /* set the remains to 0 due to precision problems when updating the remaining amount */
 311 #ifdef HAVE_TRACING
 312     TRACE_surf_host_set_utilization (((cpu_Cas01_im_t)(action->cpu))->generic_resource.name,
 313               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);
 314 #endif
 315     GENERIC_ACTION(action).remains = 0;
 316     cpu_im_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 317     cpu_im_update_remains(action->cpu, surf_get_clock());
 318   }
 319   return;
 320 }
 321
 322 static void cpu_im_update_resource_state(void *id,
 323                                   tmgr_trace_event_t event_type,
 324                                   double value, double date)
 325 {
 326   cpu_Cas01_im_t cpu = id;
 327
 328   if (event_type == cpu->power_event) {
 329     cpu->power_scale = value;
 330     lmm_update_constraint_bound(cpu_im_maxmin_system, cpu->constraint,
 331                                 cpu->power_scale * cpu->power_peak);
 332 #ifdef HAVE_TRACING
 333     TRACE_surf_host_set_power (date, cpu->generic_resource.name, cpu->power_scale * cpu->power_peak);
 334 #endif
 335     xbt_swag_insert(cpu, cpu_im_modified_cpu);
 336     if (tmgr_trace_event_free(event_type))
 337       cpu->power_event = NULL;
 338   } else if (event_type == cpu->state_event) {
 339     if (value > 0)
 340       cpu->state_current = SURF_RESOURCE_ON;
 341     else {
 342       lmm_constraint_t cnst = cpu->constraint;
 343       lmm_variable_t var = NULL;
 344       lmm_element_t elem = NULL;
 345
 346       cpu->state_current = SURF_RESOURCE_OFF;
 347
 348       while ((var = lmm_get_var_from_cnst(cpu_im_maxmin_system, cnst, &elem))) {
 349         surf_action_t action = lmm_variable_id(var);
 350
 351         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 352             surf_action_state_get(action) == SURF_ACTION_READY ||
 353             surf_action_state_get(action) == SURF_ACTION_NOT_IN_THE_SYSTEM) {
 354           action->finish = date;
 355           cpu_im_cpu_action_state_set(action, SURF_ACTION_FAILED);
 356         }
 357       }
 358     }
 359     if (tmgr_trace_event_free(event_type))
 360       cpu->state_event = NULL;
 361   } else {
 362     CRITICAL0("Unknown event ! \n");
 363     xbt_abort();
 364   }
 365
 366   return;
 367 }
 368
 369 static surf_action_t cpu_im_execute(void *cpu, double size)
 370 {
 371   surf_action_cpu_Cas01_im_t action = NULL;
 372   cpu_Cas01_im_t CPU = cpu;
 373
 374   XBT_IN2("(%s,%g)", surf_resource_name(CPU), size);
 375   action =
 376     surf_action_new(sizeof(s_surf_action_cpu_Cas01_im_t), size,
 377                     surf_cpu_model, CPU->state_current != SURF_RESOURCE_ON);
 378
 379   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 380                                                    calloc but it seems to help valgrind... */
 381
 382   GENERIC_LMM_ACTION(action).variable =
 383     lmm_variable_new(cpu_im_maxmin_system, action,
 384                      GENERIC_ACTION(action).priority, -1.0, 1);
 385   action->index_heap = -1;
 386   action->cpu = CPU;
 387   xbt_swag_insert(CPU, cpu_im_modified_cpu);
 388   xbt_swag_insert(action, CPU->action_set);
 389   lmm_expand(cpu_im_maxmin_system, CPU->constraint,
 390              GENERIC_LMM_ACTION(action).variable, 1.0);
 391   XBT_OUT;
 392   return (surf_action_t) action;
 393 }
 394
 395 static surf_action_t cpu_im_action_sleep(void *cpu, double duration)
 396 {
 397   surf_action_cpu_Cas01_im_t action = NULL;
 398
 399   if (duration > 0)
 400     duration = MAX(duration, MAXMIN_PRECISION);
 401
 402   XBT_IN2("(%s,%g)", surf_resource_name(cpu), duration);
 403   action = (surf_action_cpu_Cas01_im_t) cpu_im_execute(cpu, 1.0);
 404   GENERIC_ACTION(action).max_duration = duration;
 405   GENERIC_LMM_ACTION(action).suspended = 2;
 406   if (duration == NO_MAX_DURATION) {
 407     /* Move to the *end* of the corresponding action set. This convention
 408        is used to speed up update_resource_state  */
 409     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 410     ((surf_action_t) action)->state_set =
 411       cpu_im_running_action_set_that_does_not_need_being_checked;
 412     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 413   }
 414
 415   lmm_update_variable_weight(cpu_im_maxmin_system,
 416                              GENERIC_LMM_ACTION(action).variable, 0.0);
 417   xbt_swag_insert(cpu, cpu_im_modified_cpu);
 418   XBT_OUT;
 419   return (surf_action_t) action;
 420 }
 421
 422 static void cpu_im_action_suspend(surf_action_t action)
 423 {
 424   XBT_IN1("(%p)", action);
 425   if (((surf_action_lmm_t) action)->suspended != 2) {
 426     lmm_update_variable_weight(cpu_im_maxmin_system,
 427                                ((surf_action_lmm_t) action)->variable, 0.0);
 428     ((surf_action_lmm_t) action)->suspended = 1;
 429     xbt_heap_remove(cpu_im_action_heap,
 430                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 431     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 432   }
 433   XBT_OUT;
 434 }
 435
 436 static void cpu_im_action_resume(surf_action_t action)
 437 {
 438   XBT_IN1("(%p)", action);
 439   if (((surf_action_lmm_t) action)->suspended != 2) {
 440     lmm_update_variable_weight(cpu_im_maxmin_system,
 441                                ((surf_action_lmm_t) action)->variable,
 442                                action->priority);
 443     ((surf_action_lmm_t) action)->suspended = 0;
 444     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 445   }
 446   XBT_OUT;
 447 }
 448
 449 static int cpu_im_action_is_suspended(surf_action_t action)
 450 {
 451   return (((surf_action_lmm_t) action)->suspended == 1);
 452 }
 453
 454 static void cpu_im_action_set_max_duration(surf_action_t action, double duration)
 455 {
 456   XBT_IN2("(%p,%g)", action, duration);
 457
 458   action->max_duration = duration;
 459   /* insert cpu in modified_cpu set to notice the max duration change */
 460   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 461   XBT_OUT;
 462 }
 463
 464 static void cpu_im_action_set_priority(surf_action_t action, double priority)
 465 {
 466   XBT_IN2("(%p,%g)", action, priority);
 467   action->priority = priority;
 468   lmm_update_variable_weight(cpu_im_maxmin_system,
 469                              ((surf_action_lmm_t) action)->variable,
 470                              priority);
 471
 472   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 473   XBT_OUT;
 474 }
 475
 476 static double cpu_im_action_get_remains(surf_action_t action)
 477 {
 478   XBT_IN1("(%p)", action);
 479   /* update remains before return it */
 480   cpu_im_update_remains(ACTION_GET_CPU(action), surf_get_clock());
 481   return action->remains;
 482   XBT_OUT;
 483 }
 484
 485 static e_surf_resource_state_t cpu_im_get_state(void *cpu)
 486 {
 487   return ((cpu_Cas01_im_t) cpu)->state_current;
 488 }
 489
 490 static double cpu_im_get_speed(void *cpu, double load)
 491 {
 492   return load * (((cpu_Cas01_im_t) cpu)->power_peak);
 493 }
 494
 495 static double cpu_im_get_available_speed(void *cpu)
 496 {
 497   /* number between 0 and 1 */
 498   return ((cpu_Cas01_im_t) cpu)->power_scale;
 499 }
 500
 501 static void cpu_im_action_update_index_heap(void *action, int i)
 502 {
 503   ((surf_action_cpu_Cas01_im_t) action)->index_heap = i;
 504 }
 505
 506 static void cpu_im_finalize(void)
 507 {
 508   void *cpu;
 509   xbt_dict_cursor_t cursor;
 510   char *key;
 511   xbt_dict_foreach(surf_model_resource_set(surf_cpu_model), cursor, key, cpu) {
 512     cpu_Cas01_im_t CPU = cpu;
 513     xbt_swag_free(CPU->action_set);
 514   }
 515
 516   lmm_system_free(cpu_im_maxmin_system);
 517   cpu_im_maxmin_system = NULL;
 518
 519   surf_model_exit(surf_cpu_model);
 520   surf_cpu_model = NULL;
 521
 522   xbt_swag_free(cpu_im_running_action_set_that_does_not_need_being_checked);
 523   cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
 524   xbt_heap_free(cpu_im_action_heap);
 525   xbt_swag_free(cpu_im_modified_cpu);
 526 }
 527
 528 static void surf_cpu_im_model_init_internal(void)
 529 {
 530   s_surf_action_t action;
 531   s_cpu_Cas01_im_t cpu;
 532
 533   surf_cpu_model = surf_model_init();
 534
 535   cpu_im_running_action_set_that_does_not_need_being_checked =
 536     xbt_swag_new(xbt_swag_offset(action, state_hookup));
 537
 538   surf_cpu_model->name = "CPU_IM";
 539
 540   surf_cpu_model->action_unref = cpu_im_action_unref;
 541   surf_cpu_model->action_cancel = cpu_im_action_cancel;
 542   surf_cpu_model->action_state_set = cpu_im_cpu_action_state_set;
 543
 544   surf_cpu_model->model_private->resource_used = cpu_im_resource_used;
 545   surf_cpu_model->model_private->share_resources = cpu_im_share_resources;
 546   surf_cpu_model->model_private->update_actions_state = cpu_im_update_actions_state;
 547   surf_cpu_model->model_private->update_resource_state =
 548     cpu_im_update_resource_state;
 549   surf_cpu_model->model_private->finalize = cpu_im_finalize;
 550
 551   surf_cpu_model->suspend = cpu_im_action_suspend;
 552   surf_cpu_model->resume = cpu_im_action_resume;
 553   surf_cpu_model->is_suspended = cpu_im_action_is_suspended;
 554   surf_cpu_model->set_max_duration = cpu_im_action_set_max_duration;
 555   surf_cpu_model->set_priority = cpu_im_action_set_priority;
 556   surf_cpu_model->get_remains = cpu_im_action_get_remains;
 557
 558   surf_cpu_model->extension.cpu.execute = cpu_im_execute;
 559   surf_cpu_model->extension.cpu.sleep = cpu_im_action_sleep;
 560
 561   surf_cpu_model->extension.cpu.get_state = cpu_im_get_state;
 562   surf_cpu_model->extension.cpu.get_speed = cpu_im_get_speed;
 563   surf_cpu_model->extension.cpu.get_available_speed = cpu_im_get_available_speed;
 564
 565   if (!cpu_im_maxmin_system) {
 566     sg_maxmin_selective_update = 1;
 567     cpu_im_maxmin_system = lmm_system_new();
 568   }
 569   cpu_im_action_heap = xbt_heap_new(8, NULL);
 570   xbt_heap_set_update_callback(cpu_im_action_heap, cpu_im_action_update_index_heap);
 571   cpu_im_modified_cpu = xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
 572 }
 573
 574 /*********************************************************************/
 575 /* Basic sharing model for CPU: that is where all this started... ;) */
 576 /*********************************************************************/
 577 /* @InProceedings{casanova01simgrid, */
 578 /*   author =       "H. Casanova", */
 579 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 580 /*                  and the Grid (CCGrid'01)", */
 581 /*   publisher =    "IEEE Computer Society", */
 582 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 583 /*                  Scheduling", */
 584 /*   year =         "2001", */
 585 /*   month =        may, */
 586 /*   note =         "Available at */
 587 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 588 /* } */
 589 void surf_cpu_model_init_Cas01_im(const char *filename)
 590 {
 591   if (surf_cpu_model)
 592     return;
 593   surf_cpu_im_model_init_internal();
 594   cpu_im_define_callbacks(filename);
 595   xbt_dynar_push(model_list, &surf_cpu_model);
 596 }