src/surf/cpu_cas01.c

   1 /* Copyright (c) 2009-2013. 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 #include "surf/surf_resource.h"
   9 #include "maxmin_private.h"
  10 #include "simgrid/sg_config.h"
  11 #include "cpu_cas01_private.h"
  12
  13 #include "string.h"
  14 #include "stdlib.h"
  15
  16 surf_model_t surf_cpu_model = NULL;
  17
  18
  19 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu, surf,
  20                                 "Logging specific to the SURF CPU IMPROVED module");
  21
  22 static xbt_swag_t
  23     cpu_running_action_set_that_does_not_need_being_checked = NULL;
  24
  25 /* Additionnal callback function to cleanup some data, called from surf_resource_free */
  26
  27 static void cpu_cas01_cleanup(void* r){
  28   cpu_Cas01_t cpu = (cpu_Cas01_t)r;
  29   unsigned int iter;
  30   xbt_dynar_t power_tuple = NULL;
  31   xbt_dynar_foreach(cpu->energy->power_range_watts_list, iter, power_tuple)
  32     xbt_dynar_free(&power_tuple);
  33   xbt_dynar_free(&cpu->energy->power_range_watts_list);
  34   xbt_dynar_free(&cpu->power_peak_list);
  35   xbt_free(cpu->energy);
  36   return;
  37 }
  38
  39 /* This function is registered as a callback to sg_platf_new_host() and never called directly */
  40 static void *cpu_create_resource(const char *name, xbt_dynar_t power_peak,
  41                                                                  int pstate,
  42                                  double power_scale,
  43                                  tmgr_trace_t power_trace,
  44                                  int core,
  45                                  e_surf_resource_state_t state_initial,
  46                                  tmgr_trace_t state_trace,
  47                                  xbt_dict_t cpu_properties)
  48 {
  49   cpu_Cas01_t cpu = NULL;
  50
  51   xbt_assert(!surf_cpu_resource_priv(surf_cpu_resource_by_name(name)),
  52              "Host '%s' declared several times in the platform file",
  53              name);
  54   cpu = (cpu_Cas01_t) surf_resource_new(sizeof(s_cpu_Cas01_t),
  55                                         surf_cpu_model, name,
  56                                         cpu_properties,  &cpu_cas01_cleanup);
  57   cpu->power_peak = xbt_dynar_get_as(power_peak, pstate, double);
  58   cpu->power_peak_list = power_peak;
  59   cpu->pstate = pstate;
  60
  61   cpu->energy = xbt_new(s_energy_cpu_cas01_t, 1);
  62   cpu->energy->total_energy = 0;
  63   cpu->energy->power_range_watts_list = cpu_get_watts_range_list(cpu);
  64   cpu->energy->last_updated = surf_get_clock();
  65
  66   XBT_DEBUG("CPU create: peak=%lf, pstate=%d",cpu->power_peak, cpu->pstate);
  67
  68   xbt_assert(cpu->power_peak > 0, "Power has to be >0");
  69   cpu->power_scale = power_scale;
  70   cpu->core = core;
  71   xbt_assert(core > 0, "Invalid number of cores %d", core);
  72
  73   if (power_trace)
  74     cpu->power_event =
  75         tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
  76
  77   cpu->state_current = state_initial;
  78   if (state_trace)
  79     cpu->state_event =
  80         tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
  81
  82   cpu->constraint =
  83       lmm_constraint_new(surf_cpu_model->model_private->maxmin_system, cpu,
  84                          cpu->core * cpu->power_scale * cpu->power_peak);
  85
  86   xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, cpu);
  87
  88   return xbt_lib_get_elm_or_null(host_lib, name);;
  89 }
  90
  91
  92 static void parse_cpu_init(sg_platf_host_cbarg_t host)
  93 {
  94   cpu_create_resource(host->id,
  95                       host->power_peak,
  96                       host->pstate,
  97                       host->power_scale,
  98                       host->power_trace,
  99                       host->core_amount,
 100                       host->initial_state,
 101                       host->state_trace, host->properties);
 102 }
 103
 104 static void cpu_add_traces_cpu(void)
 105 {
 106   xbt_dict_cursor_t cursor = NULL;
 107   char *trace_name, *elm;
 108   static int called = 0;
 109   if (called)
 110     return;
 111   called = 1;
 112
 113   /* connect all traces relative to hosts */
 114   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 115     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 116     cpu_Cas01_t host = surf_cpu_resource_by_name(elm);
 117
 118     xbt_assert(host, "Host %s undefined", elm);
 119     xbt_assert(trace, "Trace %s undefined", trace_name);
 120
 121     host->state_event =
 122         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 123   }
 124
 125   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 126     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 127     cpu_Cas01_t host = surf_cpu_resource_by_name(elm);
 128
 129     xbt_assert(host, "Host %s undefined", elm);
 130     xbt_assert(trace, "Trace %s undefined", trace_name);
 131
 132     host->power_event =
 133         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 134   }
 135 }
 136
 137 static void cpu_define_callbacks()
 138 {
 139   sg_platf_host_add_cb(parse_cpu_init);
 140   sg_platf_postparse_add_cb(cpu_add_traces_cpu);
 141 }
 142
 143 static int cpu_resource_used(void *resource)
 144 {
 145   return lmm_constraint_used(surf_cpu_model->model_private->maxmin_system,
 146                              ((cpu_Cas01_t) resource)->constraint);
 147 }
 148
 149 static double cpu_share_resources_lazy(double now)
 150 {
 151   return generic_share_resources_lazy(now, surf_cpu_model);
 152 }
 153
 154 static double cpu_share_resources_full(double now)
 155 {
 156   s_surf_action_cpu_Cas01_t action;
 157   return generic_maxmin_share_resources(surf_cpu_model->states.
 158                                         running_action_set,
 159                                         xbt_swag_offset(action,
 160                                                         generic_lmm_action.
 161                                                         variable),
 162                                         surf_cpu_model->model_private->maxmin_system, lmm_solve);
 163 }
 164
 165 static void cpu_update_actions_state_lazy(double now, double delta)
 166 {
 167   generic_update_actions_state_lazy(now, delta, surf_cpu_model);
 168 }
 169
 170 static void cpu_update_actions_state_full(double now, double delta)
 171 {
 172   generic_update_actions_state_full(now, delta, surf_cpu_model);
 173 }
 174
 175 xbt_dynar_t cpu_get_watts_range_list(cpu_Cas01_t cpu_model)
 176 {
 177         xbt_dynar_t power_range_list;
 178         xbt_dynar_t power_tuple;
 179         int i = 0, pstate_nb=0;
 180         xbt_dynar_t current_power_values;
 181         double min_power, max_power;
 182         xbt_dict_t props = cpu_model->generic_resource.properties;
 183
 184         if (props == NULL)
 185                 return NULL;
 186
 187         char* all_power_values_str = xbt_dict_get_or_null(props, "power_per_state");
 188
 189         if (all_power_values_str == NULL)
 190                 return NULL;
 191
 192
 193         power_range_list = xbt_dynar_new(sizeof(xbt_dynar_t), NULL);
 194         xbt_dynar_t all_power_values = xbt_str_split(all_power_values_str, ",");
 195
 196         pstate_nb = xbt_dynar_length(all_power_values);
 197         for (i=0; i< pstate_nb; i++)
 198         {
 199                 /* retrieve the power values associated with the current pstate */
 200                 current_power_values = xbt_str_split(xbt_dynar_get_as(all_power_values, i, char*), ":");
 201                 xbt_assert(xbt_dynar_length(current_power_values) > 1,
 202                                 "Power properties incorrectly defined - could not retrieve min and max power values for host %s",
 203                                 cpu_model->generic_resource.name);
 204
 205                 /* min_power corresponds to the idle power (cpu load = 0) */
 206                 /* max_power is the power consumed at 100% cpu load       */
 207                 min_power = atof(xbt_dynar_get_as(current_power_values, 0, char*));
 208                 max_power = atof(xbt_dynar_get_as(current_power_values, 1, char*));
 209
 210                 power_tuple = xbt_dynar_new(sizeof(double), NULL);
 211                 xbt_dynar_push_as(power_tuple, double, min_power);
 212                 xbt_dynar_push_as(power_tuple, double, max_power);
 213
 214                 xbt_dynar_push_as(power_range_list, xbt_dynar_t, power_tuple);
 215                 xbt_dynar_free(&current_power_values);
 216         }
 217         xbt_dynar_free(&all_power_values);
 218         return power_range_list;
 219
 220 }
 221
 222 /**
 223  * Computes the power consumed by the host according to the current pstate and processor load
 224  *
 225  */
 226 static double cpu_get_current_watts_value(cpu_Cas01_t cpu_model, double cpu_load)
 227 {
 228         xbt_dynar_t power_range_list = cpu_model->energy->power_range_watts_list;
 229
 230         if (power_range_list == NULL)
 231         {
 232                 XBT_DEBUG("No power range properties specified for host %s", cpu_model->generic_resource.name);
 233                 return 0;
 234         }
 235         xbt_assert(xbt_dynar_length(power_range_list) == xbt_dynar_length(cpu_model->power_peak_list),
 236                                                 "The number of power ranges in the properties does not match the number of pstates for host %s",
 237                                                 cpu_model->generic_resource.name);
 238
 239     /* retrieve the power values associated with the current pstate */
 240     xbt_dynar_t current_power_values = xbt_dynar_get_as(power_range_list, cpu_model->pstate, xbt_dynar_t);
 241
 242     /* min_power corresponds to the idle power (cpu load = 0) */
 243     /* max_power is the power consumed at 100% cpu load       */
 244     double min_power = xbt_dynar_get_as(current_power_values, 0, double);
 245     double max_power = xbt_dynar_get_as(current_power_values, 1, double);
 246     double power_slope = max_power - min_power;
 247
 248     double current_power = min_power + cpu_load * power_slope;
 249
 250         XBT_DEBUG("[get_current_watts] min_power=%lf, max_power=%lf, slope=%lf", min_power, max_power, power_slope);
 251     XBT_DEBUG("[get_current_watts] Current power (watts) = %lf, load = %lf", current_power, cpu_load);
 252
 253         return current_power;
 254
 255 }
 256
 257 /**
 258  * Updates the total energy consumed as the sum of the current energy and
 259  *                                               the energy consumed by the current action
 260  */
 261 void cpu_update_energy(cpu_Cas01_t cpu_model, double cpu_load)
 262 {
 263
 264   double start_time = cpu_model->energy->last_updated;
 265   double finish_time = surf_get_clock();
 266
 267   XBT_DEBUG("[cpu_update_energy] action time interval=(%lf-%lf), current power peak=%lf, current pstate=%d",
 268                   start_time, finish_time, cpu_model->power_peak, cpu_model->pstate);
 269   double current_energy = cpu_model->energy->total_energy;
 270   double action_energy = cpu_get_current_watts_value(cpu_model, cpu_load)*(finish_time-start_time);
 271
 272   cpu_model->energy->total_energy = current_energy + action_energy;
 273   cpu_model->energy->last_updated = finish_time;
 274
 275   XBT_DEBUG("[cpu_update_energy] old_energy_value=%lf, action_energy_value=%lf", current_energy, action_energy);
 276
 277 }
 278
 279 static void cpu_update_resource_state(void *id,
 280                                       tmgr_trace_event_t event_type,
 281                                       double value, double date)
 282 {
 283   cpu_Cas01_t cpu = id;
 284   lmm_variable_t var = NULL;
 285   lmm_element_t elem = NULL;
 286
 287   if (event_type == cpu->power_event) {
 288     cpu->power_scale = value;
 289     lmm_update_constraint_bound(surf_cpu_model->model_private->maxmin_system, cpu->constraint,
 290                                 cpu->core * cpu->power_scale *
 291                                 cpu->power_peak);
 292 #ifdef HAVE_TRACING
 293     TRACE_surf_host_set_power(date, cpu->generic_resource.name,
 294                               cpu->core * cpu->power_scale *
 295                               cpu->power_peak);
 296 #endif
 297     while ((var = lmm_get_var_from_cnst
 298             (surf_cpu_model->model_private->maxmin_system, cpu->constraint, &elem))) {
 299       surf_action_cpu_Cas01_t action = lmm_variable_id(var);
 300       lmm_update_variable_bound(surf_cpu_model->model_private->maxmin_system,
 301                                 GENERIC_LMM_ACTION(action).variable,
 302                                 cpu->power_scale * cpu->power_peak);
 303     }
 304     if (tmgr_trace_event_free(event_type))
 305       cpu->power_event = NULL;
 306   } else if (event_type == cpu->state_event) {
 307     if (value > 0) {
 308       if(cpu->state_current == SURF_RESOURCE_OFF)
 309         xbt_dynar_push_as(host_that_restart, char*, (cpu->generic_resource.name));
 310       cpu->state_current = SURF_RESOURCE_ON;
 311     } else {
 312       lmm_constraint_t cnst = cpu->constraint;
 313
 314       cpu->state_current = SURF_RESOURCE_OFF;
 315
 316       while ((var = lmm_get_var_from_cnst(surf_cpu_model->model_private->maxmin_system, cnst, &elem))) {
 317         surf_action_t action = lmm_variable_id(var);
 318
 319         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 320             surf_action_state_get(action) == SURF_ACTION_READY ||
 321             surf_action_state_get(action) ==
 322             SURF_ACTION_NOT_IN_THE_SYSTEM) {
 323           action->finish = date;
 324           surf_action_state_set(action, SURF_ACTION_FAILED);
 325         }
 326       }
 327     }
 328     if (tmgr_trace_event_free(event_type))
 329       cpu->state_event = NULL;
 330   } else {
 331     XBT_CRITICAL("Unknown event ! \n");
 332     xbt_abort();
 333   }
 334
 335   return;
 336 }
 337
 338 static surf_action_t cpu_execute(void *cpu, double size)
 339 {
 340   surf_action_cpu_Cas01_t action = NULL;
 341   //xbt_dict_cursor_t cursor = NULL;
 342   cpu_Cas01_t CPU = surf_cpu_resource_priv(cpu);
 343   //xbt_dict_t props = CPU->generic_resource.properties;
 344
 345   XBT_IN("(%s,%g)", surf_resource_name(CPU), size);
 346   action =
 347       surf_action_new(sizeof(s_surf_action_cpu_Cas01_t), size,
 348                       surf_cpu_model,
 349                       CPU->state_current != SURF_RESOURCE_ON);
 350
 351   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 352                                                    calloc but it seems to help valgrind... */
 353
 354   GENERIC_LMM_ACTION(action).variable =
 355       lmm_variable_new(surf_cpu_model->model_private->maxmin_system, action,
 356                        GENERIC_ACTION(action).priority,
 357                        CPU->power_scale * CPU->power_peak, 1);
 358   if (surf_cpu_model->model_private->update_mechanism == UM_LAZY) {
 359     GENERIC_LMM_ACTION(action).index_heap = -1;
 360     GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 361     GENERIC_LMM_ACTION(action).last_value = 0.0;
 362   }
 363
 364   lmm_expand(surf_cpu_model->model_private->maxmin_system, CPU->constraint,
 365              GENERIC_LMM_ACTION(action).variable, 1.0);
 366   XBT_OUT();
 367   return (surf_action_t) action;
 368 }
 369
 370 static surf_action_t cpu_action_sleep(void *cpu, double duration)
 371 {
 372   surf_action_cpu_Cas01_t action = NULL;
 373
 374   if (duration > 0)
 375     duration = MAX(duration, MAXMIN_PRECISION);
 376
 377   XBT_IN("(%s,%g)", surf_resource_name(surf_cpu_resource_priv(cpu)), duration);
 378   action = (surf_action_cpu_Cas01_t) cpu_execute(cpu, 1.0);
 379   // FIXME: sleep variables should not consume 1.0 in lmm_expand
 380   GENERIC_ACTION(action).max_duration = duration;
 381   GENERIC_LMM_ACTION(action).suspended = 2;
 382   if (duration == NO_MAX_DURATION) {
 383     /* Move to the *end* of the corresponding action set. This convention
 384        is used to speed up update_resource_state  */
 385     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 386     ((surf_action_t) action)->state_set =
 387         cpu_running_action_set_that_does_not_need_being_checked;
 388     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 389   }
 390
 391   lmm_update_variable_weight(surf_cpu_model->model_private->maxmin_system,
 392                              GENERIC_LMM_ACTION(action).variable, 0.0);
 393   if (surf_cpu_model->model_private->update_mechanism == UM_LAZY) {     // remove action from the heap
 394     surf_action_lmm_heap_remove(surf_cpu_model->model_private->action_heap,(surf_action_lmm_t)action);
 395     // this is necessary for a variable with weight 0 since such
 396     // variables are ignored in lmm and we need to set its max_duration
 397     // correctly at the next call to share_resources
 398     xbt_swag_insert_at_head(action,surf_cpu_model->model_private->modified_set);
 399   }
 400
 401   XBT_OUT();
 402   return (surf_action_t) action;
 403 }
 404
 405 static e_surf_resource_state_t cpu_get_state(void *cpu)
 406 {
 407   return ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->state_current;
 408 }
 409
 410 static double cpu_get_speed(void *cpu, double load)
 411 {
 412   return load * ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->power_peak;
 413 }
 414
 415 static int cpu_get_core(void *cpu)
 416 {
 417   return ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->core;
 418 }
 419
 420
 421 static double cpu_get_available_speed(void *cpu)
 422 {
 423   /* number between 0 and 1 */
 424   return ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->power_scale;
 425 }
 426
 427 static double cpu_get_current_power_peak(void *cpu)
 428 {
 429   return ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->power_peak;
 430 }
 431
 432 static double cpu_get_power_peak_at(void *cpu, int pstate_index)
 433 {
 434   xbt_dynar_t plist = ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->power_peak_list;
 435   xbt_assert((pstate_index <= xbt_dynar_length(plist)), "Invalid parameters (pstate index out of bounds)");
 436
 437   return xbt_dynar_get_as(plist, pstate_index, double);
 438 }
 439
 440 static int cpu_get_nb_pstates(void *cpu)
 441 {
 442   return xbt_dynar_length(((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->power_peak_list);
 443 }
 444
 445 static void cpu_set_power_peak_at(void *cpu, int pstate_index)
 446 {
 447   cpu_Cas01_t cpu_implem = (cpu_Cas01_t)surf_cpu_resource_priv(cpu);
 448   xbt_dynar_t plist = cpu_implem->power_peak_list;
 449   xbt_assert((pstate_index <= xbt_dynar_length(plist)), "Invalid parameters (pstate index out of bounds)");
 450
 451   double new_power_peak = xbt_dynar_get_as(plist, pstate_index, double);
 452   cpu_implem->pstate = pstate_index;
 453   cpu_implem->power_peak = new_power_peak;
 454 }
 455
 456 static double cpu_get_consumed_energy(void *cpu)
 457 {
 458   return ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->energy->total_energy;
 459 }
 460
 461 static void cpu_finalize(void)
 462 {
 463   lmm_system_free(surf_cpu_model->model_private->maxmin_system);
 464   surf_cpu_model->model_private->maxmin_system = NULL;
 465
 466   if (surf_cpu_model->model_private->action_heap)
 467     xbt_heap_free(surf_cpu_model->model_private->action_heap);
 468   xbt_swag_free(surf_cpu_model->model_private->modified_set);
 469
 470   surf_model_exit(surf_cpu_model);
 471   surf_cpu_model = NULL;
 472
 473   xbt_swag_free(cpu_running_action_set_that_does_not_need_being_checked);
 474   cpu_running_action_set_that_does_not_need_being_checked = NULL;
 475 }
 476
 477 static void surf_cpu_model_init_internal()
 478 {
 479   s_surf_action_t action;
 480   s_surf_action_cpu_Cas01_t comp;
 481
 482   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
 483   int select =
 484       xbt_cfg_get_boolean(_sg_cfg_set, "cpu/maxmin_selective_update");
 485
 486   surf_cpu_model = surf_model_init();
 487
 488   if (!strcmp(optim, "Full")) {
 489     surf_cpu_model->model_private->update_mechanism = UM_FULL;
 490     surf_cpu_model->model_private->selective_update = select;
 491   } else if (!strcmp(optim, "Lazy")) {
 492     surf_cpu_model->model_private->update_mechanism = UM_LAZY;
 493     surf_cpu_model->model_private->selective_update = 1;
 494     xbt_assert((select == 1)
 495                ||
 496                (xbt_cfg_is_default_value
 497                 (_sg_cfg_set, "cpu/maxmin_selective_update")),
 498                "Disabling selective update while using the lazy update mechanism is dumb!");
 499   } else {
 500     xbt_die("Unsupported optimization (%s) for this model", optim);
 501   }
 502
 503   cpu_running_action_set_that_does_not_need_being_checked =
 504       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 505
 506   surf_cpu_model->name = "cpu";
 507
 508   surf_cpu_model->action_unref = surf_action_unref;
 509   surf_cpu_model->action_cancel = surf_action_cancel;
 510   surf_cpu_model->action_state_set = surf_action_state_set;
 511
 512   surf_cpu_model->model_private->resource_used = cpu_resource_used;
 513
 514   if (surf_cpu_model->model_private->update_mechanism == UM_LAZY) {
 515     surf_cpu_model->model_private->share_resources =
 516         cpu_share_resources_lazy;
 517     surf_cpu_model->model_private->update_actions_state =
 518         cpu_update_actions_state_lazy;
 519   } else if (surf_cpu_model->model_private->update_mechanism == UM_FULL) {
 520     surf_cpu_model->model_private->share_resources =
 521         cpu_share_resources_full;
 522     surf_cpu_model->model_private->update_actions_state =
 523         cpu_update_actions_state_full;
 524   } else
 525     xbt_die("Invalid cpu update mechanism!");
 526
 527   surf_cpu_model->model_private->update_resource_state =
 528       cpu_update_resource_state;
 529   surf_cpu_model->model_private->finalize = cpu_finalize;
 530
 531   surf_cpu_model->suspend = surf_action_suspend;
 532   surf_cpu_model->resume = surf_action_resume;
 533   surf_cpu_model->is_suspended = surf_action_is_suspended;
 534   surf_cpu_model->set_max_duration = surf_action_set_max_duration;
 535   surf_cpu_model->set_priority = surf_action_set_priority;
 536 #ifdef HAVE_TRACING
 537   surf_cpu_model->set_category = surf_action_set_category;
 538 #endif
 539   surf_cpu_model->get_remains = surf_action_get_remains;
 540
 541   surf_cpu_model->extension.cpu.execute = cpu_execute;
 542   surf_cpu_model->extension.cpu.sleep = cpu_action_sleep;
 543
 544   surf_cpu_model->extension.cpu.get_state = cpu_get_state;
 545   surf_cpu_model->extension.cpu.get_core = cpu_get_core;
 546   surf_cpu_model->extension.cpu.get_speed = cpu_get_speed;
 547   surf_cpu_model->extension.cpu.get_available_speed =
 548       cpu_get_available_speed;
 549   surf_cpu_model->extension.cpu.get_current_power_peak = cpu_get_current_power_peak;
 550   surf_cpu_model->extension.cpu.get_power_peak_at = cpu_get_power_peak_at;
 551   surf_cpu_model->extension.cpu.get_nb_pstates = cpu_get_nb_pstates;
 552   surf_cpu_model->extension.cpu.set_power_peak_at = cpu_set_power_peak_at;
 553   surf_cpu_model->extension.cpu.get_consumed_energy = cpu_get_consumed_energy;
 554
 555   surf_cpu_model->extension.cpu.add_traces = cpu_add_traces_cpu;
 556
 557   if (!surf_cpu_model->model_private->maxmin_system) {
 558     surf_cpu_model->model_private->maxmin_system = lmm_system_new(surf_cpu_model->model_private->selective_update);
 559   }
 560   if (surf_cpu_model->model_private->update_mechanism == UM_LAZY) {
 561     surf_cpu_model->model_private->action_heap = xbt_heap_new(8, NULL);
 562     xbt_heap_set_update_callback(surf_cpu_model->model_private->action_heap,
 563         surf_action_lmm_update_index_heap);
 564     surf_cpu_model->model_private->modified_set =
 565         xbt_swag_new(xbt_swag_offset(comp, generic_lmm_action.action_list_hookup));
 566     surf_cpu_model->model_private->maxmin_system->keep_track = surf_cpu_model->model_private->modified_set;
 567   }
 568 }
 569
 570 /*********************************************************************/
 571 /* Basic sharing model for CPU: that is where all this started... ;) */
 572 /*********************************************************************/
 573 /* @InProceedings{casanova01simgrid, */
 574 /*   author =       "H. Casanova", */
 575 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 576 /*                  and the Grid (CCGrid'01)", */
 577 /*   publisher =    "IEEE Computer Society", */
 578 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 579 /*                  Scheduling", */
 580 /*   year =         "2001", */
 581 /*   month =        may, */
 582 /*   note =         "Available at */
 583 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 584 /* } */
 585
 586 void surf_cpu_model_init_Cas01()
 587 {
 588   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
 589
 590   if (surf_cpu_model)
 591     return;
 592
 593   if (!strcmp(optim, "TI")) {
 594     surf_cpu_model_init_ti();
 595     return;
 596   }
 597
 598   surf_cpu_model_init_internal();
 599   cpu_define_callbacks();
 600   xbt_dynar_push(model_list, &surf_cpu_model);
 601 }