src/surf/cpu_cas01.c

   1 /* Copyright (c) 2009-2011. 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_cas1_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_cas1_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 = xbt_dynar_new(sizeof(xbt_dynar_t), NULL);
 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         xbt_dynar_t all_power_values = xbt_str_split(all_power_values_str, ",");
 193
 194         pstate_nb = xbt_dynar_length(all_power_values);
 195         for (i=0; i< pstate_nb; i++)
 196         {
 197                 /* retrieve the power values associated with the current pstate */
 198                 current_power_values = xbt_str_split(xbt_dynar_get_as(all_power_values, i, char*), ":");
 199                 xbt_assert(xbt_dynar_length(current_power_values) > 1,
 200                                 "Power properties incorrectly defined - could not retrieve min and max power values for host %s",
 201                                 cpu_model->generic_resource.name);
 202
 203                 /* min_power corresponds to the idle power (cpu load = 0) */
 204                 /* max_power is the power consumed at 100% cpu load       */
 205                 min_power = atof(xbt_dynar_get_as(current_power_values, 0, char*));
 206                 max_power = atof(xbt_dynar_get_as(current_power_values, 1, char*));
 207
 208                 power_tuple = xbt_dynar_new(sizeof(double), NULL);
 209                 xbt_dynar_push_as(power_tuple, double, min_power);
 210                 xbt_dynar_push_as(power_tuple, double, max_power);
 211
 212                 xbt_dynar_push_as(power_range_list, xbt_dynar_t, power_tuple);
 213         }
 214
 215         return power_range_list;
 216
 217 }
 218
 219 /**
 220  * Computes the power consumed by the host according to the current pstate and processor load
 221  *
 222  */
 223 static double cpu_get_current_watts_value(cpu_Cas01_t cpu_model, double cpu_load)
 224 {
 225         xbt_dynar_t power_range_list = cpu_model->energy->power_range_watts_list;
 226
 227         if (power_range_list == NULL)
 228         {
 229                 XBT_DEBUG("No power range properties specified for host %s", cpu_model->generic_resource.name);
 230                 return 0;
 231         }
 232         xbt_assert(xbt_dynar_length(power_range_list) == xbt_dynar_length(cpu_model->power_peak_list),
 233                                                 "The number of power ranges in the properties does not match the number of pstates for host %s",
 234                                                 cpu_model->generic_resource.name);
 235
 236     /* retrieve the power values associated with the current pstate */
 237     xbt_dynar_t current_power_values = xbt_dynar_get_as(power_range_list, cpu_model->pstate, xbt_dynar_t);
 238
 239     /* min_power corresponds to the idle power (cpu load = 0) */
 240     /* max_power is the power consumed at 100% cpu load       */
 241     double min_power = xbt_dynar_get_as(current_power_values, 0, double);
 242     double max_power = xbt_dynar_get_as(current_power_values, 1, double);
 243     double power_slope = max_power - min_power;
 244
 245     double current_power = min_power + cpu_load * power_slope;
 246
 247         XBT_DEBUG("[get_current_watts] min_power=%lf, max_power=%lf, slope=%lf", min_power, max_power, power_slope);
 248     XBT_DEBUG("[get_current_watts] Current power (watts) = %lf, load = %lf", current_power, cpu_load);
 249
 250         return current_power;
 251
 252 }
 253
 254 /**
 255  * Updates the total energy consumed as the sum of the current energy and
 256  *                                               the energy consumed by the current action
 257  */
 258 void cpu_update_energy(cpu_Cas01_t cpu_model, double cpu_load)
 259 {
 260
 261   double start_time = cpu_model->energy->last_updated;
 262   double finish_time = surf_get_clock();
 263
 264   XBT_DEBUG("[cpu_update_energy] action time interval=(%lf-%lf), current power peak=%lf, current pstate=%d",
 265                   start_time, finish_time, cpu_model->power_peak, cpu_model->pstate);
 266   double current_energy = cpu_model->energy->total_energy;
 267   double action_energy = cpu_get_current_watts_value(cpu_model, cpu_load)*(finish_time-start_time);
 268
 269   cpu_model->energy->total_energy = current_energy + action_energy;
 270   cpu_model->energy->last_updated = finish_time;
 271
 272   XBT_DEBUG("[cpu_update_energy] old_energy_value=%lf, action_energy_value=%lf", current_energy, action_energy);
 273
 274 }
 275
 276 static void cpu_update_resource_state(void *id,
 277                                       tmgr_trace_event_t event_type,
 278                                       double value, double date)
 279 {
 280   cpu_Cas01_t cpu = id;
 281   lmm_variable_t var = NULL;
 282   lmm_element_t elem = NULL;
 283
 284   if (event_type == cpu->power_event) {
 285     cpu->power_scale = value;
 286     lmm_update_constraint_bound(surf_cpu_model->model_private->maxmin_system, cpu->constraint,
 287                                 cpu->core * cpu->power_scale *
 288                                 cpu->power_peak);
 289 #ifdef HAVE_TRACING
 290     TRACE_surf_host_set_power(date, cpu->generic_resource.name,
 291                               cpu->core * cpu->power_scale *
 292                               cpu->power_peak);
 293 #endif
 294     while ((var = lmm_get_var_from_cnst
 295             (surf_cpu_model->model_private->maxmin_system, cpu->constraint, &elem))) {
 296       surf_action_cpu_Cas01_t action = lmm_variable_id(var);
 297       lmm_update_variable_bound(surf_cpu_model->model_private->maxmin_system,
 298                                 GENERIC_LMM_ACTION(action).variable,
 299                                 cpu->power_scale * cpu->power_peak);
 300     }
 301     if (tmgr_trace_event_free(event_type))
 302       cpu->power_event = NULL;
 303   } else if (event_type == cpu->state_event) {
 304     if (value > 0) {
 305       if(cpu->state_current == SURF_RESOURCE_OFF)
 306         xbt_dynar_push_as(host_that_restart, char*, (cpu->generic_resource.name));
 307       cpu->state_current = SURF_RESOURCE_ON;
 308     } else {
 309       lmm_constraint_t cnst = cpu->constraint;
 310
 311       cpu->state_current = SURF_RESOURCE_OFF;
 312
 313       while ((var = lmm_get_var_from_cnst(surf_cpu_model->model_private->maxmin_system, cnst, &elem))) {
 314         surf_action_t action = lmm_variable_id(var);
 315
 316         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 317             surf_action_state_get(action) == SURF_ACTION_READY ||
 318             surf_action_state_get(action) ==
 319             SURF_ACTION_NOT_IN_THE_SYSTEM) {
 320           action->finish = date;
 321           surf_action_state_set(action, SURF_ACTION_FAILED);
 322         }
 323       }
 324     }
 325     if (tmgr_trace_event_free(event_type))
 326       cpu->state_event = NULL;
 327   } else {
 328     XBT_CRITICAL("Unknown event ! \n");
 329     xbt_abort();
 330   }
 331
 332   return;
 333 }
 334
 335 static surf_action_t cpu_execute(void *cpu, double size)
 336 {
 337   surf_action_cpu_Cas01_t action = NULL;
 338   //xbt_dict_cursor_t cursor = NULL;
 339   cpu_Cas01_t CPU = surf_cpu_resource_priv(cpu);
 340   //xbt_dict_t props = CPU->generic_resource.properties;
 341
 342   XBT_IN("(%s,%g)", surf_resource_name(CPU), size);
 343   action =
 344       surf_action_new(sizeof(s_surf_action_cpu_Cas01_t), size,
 345                       surf_cpu_model,
 346                       CPU->state_current != SURF_RESOURCE_ON);
 347
 348   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 349                                                    calloc but it seems to help valgrind... */
 350
 351   GENERIC_LMM_ACTION(action).variable =
 352       lmm_variable_new(surf_cpu_model->model_private->maxmin_system, action,
 353                        GENERIC_ACTION(action).priority,
 354                        CPU->power_scale * CPU->power_peak, 1);
 355   if (surf_cpu_model->model_private->update_mechanism == UM_LAZY) {
 356     GENERIC_LMM_ACTION(action).index_heap = -1;
 357     GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 358     GENERIC_LMM_ACTION(action).last_value = 0.0;
 359   }
 360
 361   lmm_expand(surf_cpu_model->model_private->maxmin_system, CPU->constraint,
 362              GENERIC_LMM_ACTION(action).variable, 1.0);
 363   XBT_OUT();
 364   return (surf_action_t) action;
 365 }
 366
 367 static surf_action_t cpu_action_sleep(void *cpu, double duration)
 368 {
 369   surf_action_cpu_Cas01_t action = NULL;
 370
 371   if (duration > 0)
 372     duration = MAX(duration, MAXMIN_PRECISION);
 373
 374   XBT_IN("(%s,%g)", surf_resource_name(surf_cpu_resource_priv(cpu)), duration);
 375   action = (surf_action_cpu_Cas01_t) cpu_execute(cpu, 1.0);
 376   // FIXME: sleep variables should not consume 1.0 in lmm_expand
 377   GENERIC_ACTION(action).max_duration = duration;
 378   GENERIC_LMM_ACTION(action).suspended = 2;
 379   if (duration == NO_MAX_DURATION) {
 380     /* Move to the *end* of the corresponding action set. This convention
 381        is used to speed up update_resource_state  */
 382     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 383     ((surf_action_t) action)->state_set =
 384         cpu_running_action_set_that_does_not_need_being_checked;
 385     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 386   }
 387
 388   lmm_update_variable_weight(surf_cpu_model->model_private->maxmin_system,
 389                              GENERIC_LMM_ACTION(action).variable, 0.0);
 390   if (surf_cpu_model->model_private->update_mechanism == UM_LAZY) {     // remove action from the heap
 391     surf_action_lmm_heap_remove(surf_cpu_model->model_private->action_heap,(surf_action_lmm_t)action);
 392     // this is necessary for a variable with weight 0 since such
 393     // variables are ignored in lmm and we need to set its max_duration
 394     // correctly at the next call to share_resources
 395     xbt_swag_insert_at_head(action,surf_cpu_model->model_private->modified_set);
 396   }
 397
 398   XBT_OUT();
 399   return (surf_action_t) action;
 400 }
 401
 402 static e_surf_resource_state_t cpu_get_state(void *cpu)
 403 {
 404   return ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->state_current;
 405 }
 406
 407 static double cpu_get_speed(void *cpu, double load)
 408 {
 409   return load * ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->power_peak;
 410 }
 411
 412 static int cpu_get_core(void *cpu)
 413 {
 414   return ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->core;
 415 }
 416
 417
 418 static double cpu_get_available_speed(void *cpu)
 419 {
 420   /* number between 0 and 1 */
 421   return ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->power_scale;
 422 }
 423
 424 static double cpu_get_current_power_peak(void *cpu)
 425 {
 426   return ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->power_peak;
 427 }
 428
 429 static double cpu_get_power_peak_at(void *cpu, int pstate_index)
 430 {
 431   xbt_dynar_t plist = ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->power_peak_list;
 432   xbt_assert((pstate_index <= xbt_dynar_length(plist)), "Invalid parameters (pstate index out of bounds)");
 433
 434   return xbt_dynar_get_as(plist, pstate_index, double);
 435 }
 436
 437 static int cpu_get_nb_pstates(void *cpu)
 438 {
 439   return xbt_dynar_length(((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->power_peak_list);
 440 }
 441
 442 static void cpu_set_power_peak_at(void *cpu, int pstate_index)
 443 {
 444   cpu_Cas01_t cpu_implem = (cpu_Cas01_t)surf_cpu_resource_priv(cpu);
 445   xbt_dynar_t plist = cpu_implem->power_peak_list;
 446   xbt_assert((pstate_index <= xbt_dynar_length(plist)), "Invalid parameters (pstate index out of bounds)");
 447
 448   double new_power_peak = xbt_dynar_get_as(plist, pstate_index, double);
 449   cpu_implem->pstate = pstate_index;
 450   cpu_implem->power_peak = new_power_peak;
 451 }
 452
 453 static double cpu_get_consumed_energy(void *cpu)
 454 {
 455   return ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->energy->total_energy;
 456 }
 457
 458 static void cpu_finalize(void)
 459 {
 460   lmm_system_free(surf_cpu_model->model_private->maxmin_system);
 461   surf_cpu_model->model_private->maxmin_system = NULL;
 462
 463   if (surf_cpu_model->model_private->action_heap)
 464     xbt_heap_free(surf_cpu_model->model_private->action_heap);
 465   xbt_swag_free(surf_cpu_model->model_private->modified_set);
 466
 467   surf_model_exit(surf_cpu_model);
 468   surf_cpu_model = NULL;
 469
 470   xbt_swag_free(cpu_running_action_set_that_does_not_need_being_checked);
 471   cpu_running_action_set_that_does_not_need_being_checked = NULL;
 472 }
 473
 474 static void surf_cpu_model_init_internal()
 475 {
 476   s_surf_action_t action;
 477   s_surf_action_cpu_Cas01_t comp;
 478
 479   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
 480   int select =
 481       xbt_cfg_get_boolean(_sg_cfg_set, "cpu/maxmin_selective_update");
 482
 483   surf_cpu_model = surf_model_init();
 484
 485   if (!strcmp(optim, "Full")) {
 486     surf_cpu_model->model_private->update_mechanism = UM_FULL;
 487     surf_cpu_model->model_private->selective_update = select;
 488   } else if (!strcmp(optim, "Lazy")) {
 489     surf_cpu_model->model_private->update_mechanism = UM_LAZY;
 490     surf_cpu_model->model_private->selective_update = 1;
 491     xbt_assert((select == 1)
 492                ||
 493                (xbt_cfg_is_default_value
 494                 (_sg_cfg_set, "cpu/maxmin_selective_update")),
 495                "Disabling selective update while using the lazy update mechanism is dumb!");
 496   } else {
 497     xbt_die("Unsupported optimization (%s) for this model", optim);
 498   }
 499
 500   cpu_running_action_set_that_does_not_need_being_checked =
 501       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 502
 503   surf_cpu_model->name = "cpu";
 504
 505   surf_cpu_model->action_unref = surf_action_unref;
 506   surf_cpu_model->action_cancel = surf_action_cancel;
 507   surf_cpu_model->action_state_set = surf_action_state_set;
 508
 509   surf_cpu_model->model_private->resource_used = cpu_resource_used;
 510
 511   if (surf_cpu_model->model_private->update_mechanism == UM_LAZY) {
 512     surf_cpu_model->model_private->share_resources =
 513         cpu_share_resources_lazy;
 514     surf_cpu_model->model_private->update_actions_state =
 515         cpu_update_actions_state_lazy;
 516   } else if (surf_cpu_model->model_private->update_mechanism == UM_FULL) {
 517     surf_cpu_model->model_private->share_resources =
 518         cpu_share_resources_full;
 519     surf_cpu_model->model_private->update_actions_state =
 520         cpu_update_actions_state_full;
 521   } else
 522     xbt_die("Invalid cpu update mechanism!");
 523
 524   surf_cpu_model->model_private->update_resource_state =
 525       cpu_update_resource_state;
 526   surf_cpu_model->model_private->finalize = cpu_finalize;
 527
 528   surf_cpu_model->suspend = surf_action_suspend;
 529   surf_cpu_model->resume = surf_action_resume;
 530   surf_cpu_model->is_suspended = surf_action_is_suspended;
 531   surf_cpu_model->set_max_duration = surf_action_set_max_duration;
 532   surf_cpu_model->set_priority = surf_action_set_priority;
 533 #ifdef HAVE_TRACING
 534   surf_cpu_model->set_category = surf_action_set_category;
 535 #endif
 536   surf_cpu_model->get_remains = surf_action_get_remains;
 537
 538   surf_cpu_model->extension.cpu.execute = cpu_execute;
 539   surf_cpu_model->extension.cpu.sleep = cpu_action_sleep;
 540
 541   surf_cpu_model->extension.cpu.get_state = cpu_get_state;
 542   surf_cpu_model->extension.cpu.get_core = cpu_get_core;
 543   surf_cpu_model->extension.cpu.get_speed = cpu_get_speed;
 544   surf_cpu_model->extension.cpu.get_available_speed =
 545       cpu_get_available_speed;
 546   surf_cpu_model->extension.cpu.get_current_power_peak = cpu_get_current_power_peak;
 547   surf_cpu_model->extension.cpu.get_power_peak_at = cpu_get_power_peak_at;
 548   surf_cpu_model->extension.cpu.get_nb_pstates = cpu_get_nb_pstates;
 549   surf_cpu_model->extension.cpu.set_power_peak_at = cpu_set_power_peak_at;
 550   surf_cpu_model->extension.cpu.get_consumed_energy = cpu_get_consumed_energy;
 551
 552   surf_cpu_model->extension.cpu.add_traces = cpu_add_traces_cpu;
 553
 554   if (!surf_cpu_model->model_private->maxmin_system) {
 555     surf_cpu_model->model_private->maxmin_system = lmm_system_new(surf_cpu_model->model_private->selective_update);
 556   }
 557   if (surf_cpu_model->model_private->update_mechanism == UM_LAZY) {
 558     surf_cpu_model->model_private->action_heap = xbt_heap_new(8, NULL);
 559     xbt_heap_set_update_callback(surf_cpu_model->model_private->action_heap,
 560         surf_action_lmm_update_index_heap);
 561     surf_cpu_model->model_private->modified_set =
 562         xbt_swag_new(xbt_swag_offset(comp, generic_lmm_action.action_list_hookup));
 563     surf_cpu_model->model_private->maxmin_system->keep_track = surf_cpu_model->model_private->modified_set;
 564   }
 565 }
 566
 567 /*********************************************************************/
 568 /* Basic sharing model for CPU: that is where all this started... ;) */
 569 /*********************************************************************/
 570 /* @InProceedings{casanova01simgrid, */
 571 /*   author =       "H. Casanova", */
 572 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 573 /*                  and the Grid (CCGrid'01)", */
 574 /*   publisher =    "IEEE Computer Society", */
 575 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 576 /*                  Scheduling", */
 577 /*   year =         "2001", */
 578 /*   month =        may, */
 579 /*   note =         "Available at */
 580 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 581 /* } */
 582
 583 void surf_cpu_model_init_Cas01()
 584 {
 585   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
 586
 587   if (surf_cpu_model)
 588     return;
 589
 590   if (!strcmp(optim, "TI")) {
 591     surf_cpu_model_init_ti();
 592     return;
 593   }
 594
 595   surf_cpu_model_init_internal();
 596   cpu_define_callbacks();
 597   xbt_dynar_push(model_list, &surf_cpu_model);
 598 }