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
  11 surf_model_t surf_cpu_model = NULL;
  12 lmm_system_t cpu_maxmin_system = NULL;
  13 e_UM_t cpu_update_mechanism = UM_UNDEFINED;
  14 static int cpu_selective_update = 0;
  15
  16 static xbt_swag_t cpu_modified_set= NULL;
  17 static xbt_heap_t cpu_action_heap = NULL;
  18
  19 #undef GENERIC_LMM_ACTION
  20 #undef GENERIC_ACTION
  21 #undef ACTION_GET_CPU
  22 #define GENERIC_LMM_ACTION(action) action->generic_lmm_action
  23 #define GENERIC_ACTION(action) GENERIC_LMM_ACTION(action).generic_action
  24 #define ACTION_GET_CPU(action) ((surf_action_cpu_Cas01_t) action)->cpu
  25
  26 typedef struct surf_action_cpu_cas01 {
  27   s_surf_action_lmm_t generic_lmm_action;
  28 } s_surf_action_cpu_Cas01_t, *surf_action_cpu_Cas01_t;
  29
  30 typedef struct cpu_Cas01 {
  31   s_surf_resource_t generic_resource;
  32   s_xbt_swag_hookup_t modified_cpu_hookup;
  33   double power_peak;
  34   double power_scale;
  35   tmgr_trace_event_t power_event;
  36   int core;
  37   e_surf_resource_state_t state_current;
  38   tmgr_trace_event_t state_event;
  39   lmm_constraint_t constraint;
  40 } s_cpu_Cas01_t, *cpu_Cas01_t;
  41
  42 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu, surf,
  43                                 "Logging specific to the SURF CPU IMPROVED module");
  44
  45
  46
  47 static xbt_swag_t
  48     cpu_running_action_set_that_does_not_need_being_checked = NULL;
  49
  50
  51 static void *cpu_create_resource(const char *name, double power_peak,
  52                                  double power_scale,
  53                                  tmgr_trace_t power_trace,
  54                                  int core,
  55                                  e_surf_resource_state_t state_initial,
  56                                  tmgr_trace_t state_trace,
  57                                  xbt_dict_t cpu_properties)
  58 {
  59   cpu_Cas01_t cpu = NULL;
  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_t) surf_resource_new(sizeof(s_cpu_Cas01_t),
  65                                         surf_cpu_model, name,
  66                                         cpu_properties);
  67   cpu->power_peak = power_peak;
  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(cpu_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 cpu;
  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->power_scale,
  97                       host->power_trace,
  98                       host->core_amount,
  99                       host->initial_state,
 100                       host->state_trace, host->properties);
 101 }
 102
 103 static void cpu_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_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_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_define_callbacks()
 137 {
 138   sg_platf_host_add_cb(parse_cpu_init);
 139   sg_platf_postparse_add_cb(cpu_add_traces_cpu);
 140 }
 141
 142 static int cpu_resource_used(void *resource)
 143 {
 144   return lmm_constraint_used(cpu_maxmin_system,
 145                              ((cpu_Cas01_t) resource)->constraint);
 146 }
 147
 148 static int cpu_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_maxmin_system,
 155                         ((surf_action_lmm_t) action)->variable);
 156     if (cpu_update_mechanism == UM_LAZY) {
 157       /* remove from heap */
 158       surf_action_lmm_heap_remove(cpu_action_heap,(surf_action_lmm_t)action);
 159       xbt_swag_remove(action, cpu_modified_set);
 160     }
 161 #ifdef HAVE_TRACING
 162     xbt_free(action->category);
 163 #endif
 164     surf_action_free(&action);
 165     return 1;
 166   }
 167   return 0;
 168 }
 169
 170 static void cpu_action_cancel(surf_action_t action)
 171 {
 172   surf_action_state_set(action, SURF_ACTION_FAILED);
 173   if (cpu_update_mechanism == UM_LAZY) {
 174     xbt_swag_remove(action, cpu_modified_set);
 175     surf_action_lmm_heap_remove(cpu_action_heap,(surf_action_lmm_t)action);
 176   }
 177   return;
 178 }
 179
 180 static void cpu_action_state_set(surf_action_t action,
 181                                      e_surf_action_state_t state)
 182 {
 183 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 184 /*     if(((surf_action_lmm_t)action)->variable) { */
 185 /*       lmm_variable_disable(cpu_maxmin_system, ((surf_action_lmm_t)action)->variable); */
 186 /*       ((surf_action_lmm_t)action)->variable = NULL; */
 187 /*     } */
 188
 189   surf_action_state_set(action, state);
 190   return;
 191 }
 192
 193 static void cpu_update_action_remaining_lazy(double now)
 194 {
 195   surf_action_cpu_Cas01_t action;
 196   double delta = 0.0;
 197
 198   xbt_swag_foreach(action, cpu_modified_set) {
 199     if (GENERIC_ACTION(action).state_set !=
 200         surf_cpu_model->states.running_action_set)
 201       continue; // FIXME useless ????
 202
 203     /* bogus priority, skip it */
 204     if (GENERIC_ACTION(action).priority <= 0)
 205       continue;
 206
 207     delta = now - GENERIC_LMM_ACTION(action).last_update;
 208     if (GENERIC_ACTION(action).remains > 0) {
 209
 210       double_update(&(GENERIC_ACTION(action).remains),
 211                     lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * delta);
 212
 213 #ifdef HAVE_TRACING
 214       if (TRACE_is_enabled()) {
 215         cpu_Cas01_t cpu =
 216             lmm_constraint_id(lmm_get_cnst_from_var
 217                               (cpu_maxmin_system,
 218                                GENERIC_LMM_ACTION(action).variable, 0));
 219         TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 220                                         ((surf_action_t)action)->category,
 221                                         lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable),
 222                                         GENERIC_LMM_ACTION(action).last_update,
 223                                         now - GENERIC_LMM_ACTION(action).last_update);
 224       }
 225 #endif
 226       XBT_DEBUG("Update action(%p) remains %lf", action,
 227                 GENERIC_ACTION(action).remains);
 228     }
 229     GENERIC_LMM_ACTION(action).last_update = now;
 230   }
 231
 232 }
 233
 234 static double cpu_share_resources_lazy(double now)
 235 {
 236   surf_action_cpu_Cas01_t action = NULL;
 237   double min = -1;
 238   double value;
 239
 240   XBT_DEBUG
 241       ("Before share resources, the size of modified actions set is %d",
 242        xbt_swag_size(cpu_modified_set));
 243   cpu_update_action_remaining_lazy(now);
 244
 245   lmm_solve(cpu_maxmin_system);
 246
 247   XBT_DEBUG
 248       ("After share resources, The size of modified actions set is %d",
 249        xbt_swag_size(cpu_modified_set));
 250
 251   xbt_swag_foreach(action, cpu_modified_set) {
 252     int max_dur_flag = 0;
 253
 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         min = now + value;
 268       } else {
 269         value = 0.0;
 270         min = now;
 271       }
 272     }
 273
 274     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 275         && (min == -1
 276             || GENERIC_ACTION(action).start +
 277             GENERIC_ACTION(action).max_duration < min)) {
 278       min = GENERIC_ACTION(action).start +
 279           GENERIC_ACTION(action).max_duration;
 280       max_dur_flag = 1;
 281     }
 282
 283     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 284         GENERIC_ACTION(action).start, now + value,
 285         GENERIC_ACTION(action).max_duration);
 286
 287     if (min != -1) {
 288       surf_action_lmm_heap_remove(cpu_action_heap,(surf_action_lmm_t)action);
 289       surf_action_lmm_heap_insert(cpu_action_heap,(surf_action_lmm_t)action, min, max_dur_flag ? MAX_DURATION : NORMAL);
 290       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 291                 now);
 292     } else DIE_IMPOSSIBLE;
 293   }
 294
 295   //hereafter must have already the min value for this resource model
 296   if (xbt_heap_size(cpu_action_heap) > 0)
 297     min = xbt_heap_maxkey(cpu_action_heap) - now;
 298   else
 299     min = -1;
 300
 301   XBT_DEBUG("The minimum with the HEAP %lf", min);
 302
 303   return min;
 304 }
 305
 306 static double cpu_share_resources_full(double now)
 307 {
 308   s_surf_action_cpu_Cas01_t action;
 309   return generic_maxmin_share_resources(surf_cpu_model->states.
 310                                         running_action_set,
 311                                         xbt_swag_offset(action,
 312                                                         generic_lmm_action.
 313                                                         variable),
 314                                         cpu_maxmin_system, lmm_solve);
 315 }
 316
 317 static void cpu_update_actions_state_lazy(double now, double delta)
 318 {
 319   surf_action_cpu_Cas01_t action;
 320   while ((xbt_heap_size(cpu_action_heap) > 0)
 321          && (double_equals(xbt_heap_maxkey(cpu_action_heap), now))) {
 322     action = xbt_heap_pop(cpu_action_heap);
 323     XBT_DEBUG("Action %p: finish", action);
 324     GENERIC_ACTION(action).finish = surf_get_clock();
 325 #ifdef HAVE_TRACING
 326     if (TRACE_is_enabled()) {
 327       cpu_Cas01_t cpu =
 328           lmm_constraint_id(lmm_get_cnst_from_var
 329                             (cpu_maxmin_system,
 330                              GENERIC_LMM_ACTION(action).variable, 0));
 331       TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 332                                       ((surf_action_t)action)->category,
 333                                       lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable),
 334                                       GENERIC_LMM_ACTION(action).last_update,
 335                                       now - GENERIC_LMM_ACTION(action).last_update);
 336     }
 337 #endif
 338     /* set the remains to 0 due to precision problems when updating the remaining amount */
 339     GENERIC_ACTION(action).remains = 0;
 340     cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 341     surf_action_lmm_heap_remove(cpu_action_heap,(surf_action_lmm_t)action);
 342   }
 343 #ifdef HAVE_TRACING
 344   if (TRACE_is_enabled()) {
 345     //defining the last timestamp that we can safely dump to trace file
 346     //without losing the event ascending order (considering all CPU's)
 347     double smaller = -1;
 348     xbt_swag_t running_actions = surf_cpu_model->states.running_action_set;
 349     xbt_swag_foreach(action, running_actions) {
 350         if (smaller < 0) {
 351           smaller = GENERIC_LMM_ACTION(action).last_update;
 352           continue;
 353         }
 354         if (GENERIC_LMM_ACTION(action).last_update < smaller) {
 355           smaller = GENERIC_LMM_ACTION(action).last_update;
 356         }
 357     }
 358     if (smaller > 0) {
 359       TRACE_last_timestamp_to_dump = smaller;
 360     }
 361   }
 362 #endif
 363   return;
 364 }
 365
 366 static void cpu_update_actions_state_full(double now, double delta)
 367 {
 368   surf_action_cpu_Cas01_t action = NULL;
 369   surf_action_cpu_Cas01_t next_action = NULL;
 370   xbt_swag_t running_actions = surf_cpu_model->states.running_action_set;
 371   xbt_swag_foreach_safe(action, next_action, running_actions) {
 372 #ifdef HAVE_TRACING
 373     if (TRACE_is_enabled()) {
 374       cpu_Cas01_t x =
 375           lmm_constraint_id(lmm_get_cnst_from_var
 376                             (cpu_maxmin_system,
 377                              GENERIC_LMM_ACTION(action).variable, 0));
 378
 379       TRACE_surf_host_set_utilization(x->generic_resource.name,
 380                                       ((surf_action_t)action)->category,
 381                                       lmm_variable_getvalue(GENERIC_LMM_ACTION(action).
 382                                        variable),
 383                                       now - delta,
 384                                       delta);
 385       TRACE_last_timestamp_to_dump = now - delta;
 386     }
 387 #endif
 388     double_update(&(GENERIC_ACTION(action).remains),
 389                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).
 390                                         variable) * delta);
 391     if (GENERIC_LMM_ACTION(action).generic_action.max_duration !=
 392         NO_MAX_DURATION)
 393       double_update(&(GENERIC_ACTION(action).max_duration), delta);
 394     if ((GENERIC_ACTION(action).remains <= 0) &&
 395         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) >
 396          0)) {
 397       GENERIC_ACTION(action).finish = surf_get_clock();
 398       cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 399     } else if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION) &&
 400                (GENERIC_ACTION(action).max_duration <= 0)) {
 401       GENERIC_ACTION(action).finish = surf_get_clock();
 402       cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 403     }
 404   }
 405
 406   return;
 407 }
 408
 409 static void cpu_update_resource_state(void *id,
 410                                       tmgr_trace_event_t event_type,
 411                                       double value, double date)
 412 {
 413   cpu_Cas01_t cpu = id;
 414   lmm_variable_t var = NULL;
 415   lmm_element_t elem = NULL;
 416
 417   if (event_type == cpu->power_event) {
 418     cpu->power_scale = value;
 419     lmm_update_constraint_bound(cpu_maxmin_system, cpu->constraint,
 420                                 cpu->core * cpu->power_scale *
 421                                 cpu->power_peak);
 422 #ifdef HAVE_TRACING
 423     TRACE_surf_host_set_power(date, cpu->generic_resource.name,
 424                               cpu->core * cpu->power_scale *
 425                               cpu->power_peak);
 426 #endif
 427     while ((var = lmm_get_var_from_cnst
 428             (cpu_maxmin_system, cpu->constraint, &elem))) {
 429       surf_action_cpu_Cas01_t action = lmm_variable_id(var);
 430       lmm_update_variable_bound(cpu_maxmin_system,
 431                                 GENERIC_LMM_ACTION(action).variable,
 432                                 cpu->power_scale * cpu->power_peak);
 433     }
 434     if (tmgr_trace_event_free(event_type))
 435       cpu->power_event = NULL;
 436   } else if (event_type == cpu->state_event) {
 437     if (value > 0)
 438       cpu->state_current = SURF_RESOURCE_ON;
 439     else {
 440       lmm_constraint_t cnst = cpu->constraint;
 441
 442       cpu->state_current = SURF_RESOURCE_OFF;
 443
 444       while ((var = lmm_get_var_from_cnst(cpu_maxmin_system, cnst, &elem))) {
 445         surf_action_t action = lmm_variable_id(var);
 446
 447         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 448             surf_action_state_get(action) == SURF_ACTION_READY ||
 449             surf_action_state_get(action) ==
 450             SURF_ACTION_NOT_IN_THE_SYSTEM) {
 451           action->finish = date;
 452           cpu_action_state_set(action, SURF_ACTION_FAILED);
 453         }
 454       }
 455     }
 456     if (tmgr_trace_event_free(event_type))
 457       cpu->state_event = NULL;
 458   } else {
 459     XBT_CRITICAL("Unknown event ! \n");
 460     xbt_abort();
 461   }
 462
 463   return;
 464 }
 465
 466 static surf_action_t cpu_execute(void *cpu, double size)
 467 {
 468   surf_action_cpu_Cas01_t action = NULL;
 469   cpu_Cas01_t CPU = cpu;
 470
 471   XBT_IN("(%s,%g)", surf_resource_name(CPU), size);
 472   action =
 473       surf_action_new(sizeof(s_surf_action_cpu_Cas01_t), size,
 474                       surf_cpu_model,
 475                       CPU->state_current != SURF_RESOURCE_ON);
 476
 477   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 478                                                    calloc but it seems to help valgrind... */
 479
 480   GENERIC_LMM_ACTION(action).variable =
 481       lmm_variable_new(cpu_maxmin_system, action,
 482                        GENERIC_ACTION(action).priority,
 483                        CPU->power_scale * CPU->power_peak, 1);
 484   if (cpu_update_mechanism == UM_LAZY) {
 485     GENERIC_LMM_ACTION(action).index_heap = -1;
 486     GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 487   }
 488   lmm_expand(cpu_maxmin_system, CPU->constraint,
 489              GENERIC_LMM_ACTION(action).variable, 1.0);
 490   XBT_OUT();
 491   return (surf_action_t) action;
 492 }
 493
 494 static surf_action_t cpu_action_sleep(void *cpu, double duration)
 495 {
 496   surf_action_cpu_Cas01_t action = NULL;
 497
 498   if (duration > 0)
 499     duration = MAX(duration, MAXMIN_PRECISION);
 500
 501   XBT_IN("(%s,%g)", surf_resource_name(cpu), duration);
 502   action = (surf_action_cpu_Cas01_t) cpu_execute(cpu, 1.0);
 503   GENERIC_ACTION(action).max_duration = duration;
 504   GENERIC_LMM_ACTION(action).suspended = 2;
 505   if (duration == NO_MAX_DURATION) {
 506     /* Move to the *end* of the corresponding action set. This convention
 507        is used to speed up update_resource_state  */
 508     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 509     ((surf_action_t) action)->state_set =
 510         cpu_running_action_set_that_does_not_need_being_checked;
 511     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 512   }
 513
 514   lmm_update_variable_weight(cpu_maxmin_system,
 515                              GENERIC_LMM_ACTION(action).variable, 0.0);
 516   if (cpu_update_mechanism == UM_LAZY) {     // remove action from the heap
 517     surf_action_lmm_heap_remove(cpu_action_heap,(surf_action_lmm_t)action);
 518     // this is necessary for a variable with weight 0 since such
 519     // variables are ignored in lmm and we need to set its max_duration
 520     // correctly at the next call to share_resources
 521     xbt_swag_insert_at_head(action,cpu_modified_set);
 522   }
 523
 524   XBT_OUT();
 525   return (surf_action_t) action;
 526 }
 527
 528 static void cpu_action_suspend(surf_action_t action)
 529 {
 530   XBT_IN("(%p)", action);
 531   if (((surf_action_lmm_t) action)->suspended != 2) {
 532     lmm_update_variable_weight(cpu_maxmin_system,
 533                                ((surf_action_lmm_t) action)->variable,
 534                                0.0);
 535     ((surf_action_lmm_t) action)->suspended = 1;
 536     if (cpu_update_mechanism == UM_LAZY)
 537       surf_action_lmm_heap_remove(cpu_action_heap,(surf_action_lmm_t)action);
 538   }
 539   XBT_OUT();
 540 }
 541
 542 static void cpu_action_resume(surf_action_t action)
 543 {
 544
 545   XBT_IN("(%p)", action);
 546   if (((surf_action_lmm_t) action)->suspended != 2) {
 547     lmm_update_variable_weight(cpu_maxmin_system,
 548                                ((surf_action_lmm_t) action)->variable,
 549                                action->priority);
 550     ((surf_action_lmm_t) action)->suspended = 0;
 551     if (cpu_update_mechanism == UM_LAZY)
 552       surf_action_lmm_heap_remove(cpu_action_heap,(surf_action_lmm_t)action);
 553   }
 554   XBT_OUT();
 555 }
 556
 557 static int cpu_action_is_suspended(surf_action_t action)
 558 {
 559   return (((surf_action_lmm_t) action)->suspended == 1);
 560 }
 561
 562 static void cpu_action_set_max_duration(surf_action_t action,
 563                                         double duration)
 564 {
 565   XBT_IN("(%p,%g)", action, duration);
 566
 567   action->max_duration = duration;
 568   if (cpu_update_mechanism == UM_LAZY)
 569     surf_action_lmm_heap_remove(cpu_action_heap,(surf_action_lmm_t)action);
 570   XBT_OUT();
 571 }
 572
 573 static void cpu_action_set_priority(surf_action_t action, double priority)
 574 {
 575   XBT_IN("(%p,%g)", action, priority);
 576   action->priority = priority;
 577   lmm_update_variable_weight(cpu_maxmin_system,
 578                              ((surf_action_lmm_t) action)->variable,
 579                              priority);
 580
 581   if (cpu_update_mechanism == UM_LAZY)
 582     surf_action_lmm_heap_remove(cpu_action_heap,(surf_action_lmm_t)action);
 583   XBT_OUT();
 584 }
 585
 586 #ifdef HAVE_TRACING
 587 static void cpu_action_set_category(surf_action_t action,
 588                                     const char *category)
 589 {
 590   XBT_IN("(%p,%s)", action, category);
 591   action->category = xbt_strdup(category);
 592   XBT_OUT();
 593 }
 594 #endif
 595
 596 static double cpu_action_get_remains(surf_action_t action)
 597 {
 598   XBT_IN("(%p)", action);
 599   /* update remains before return it */
 600   if (cpu_update_mechanism == UM_LAZY)
 601     cpu_update_action_remaining_lazy(surf_get_clock());
 602   XBT_OUT();
 603   return action->remains;
 604 }
 605
 606 static e_surf_resource_state_t cpu_get_state(void *cpu)
 607 {
 608   return ((cpu_Cas01_t) cpu)->state_current;
 609 }
 610
 611 static double cpu_get_speed(void *cpu, double load)
 612 {
 613   return load * (((cpu_Cas01_t) cpu)->power_peak);
 614 }
 615
 616 static double cpu_get_available_speed(void *cpu)
 617 {
 618   /* number between 0 and 1 */
 619   return ((cpu_Cas01_t) cpu)->power_scale;
 620 }
 621
 622 static void cpu_finalize(void)
 623 {
 624   lmm_system_free(cpu_maxmin_system);
 625   cpu_maxmin_system = NULL;
 626
 627   surf_model_exit(surf_cpu_model);
 628   surf_cpu_model = NULL;
 629
 630   xbt_swag_free(cpu_running_action_set_that_does_not_need_being_checked);
 631   cpu_running_action_set_that_does_not_need_being_checked = NULL;
 632   if (cpu_action_heap)
 633     xbt_heap_free(cpu_action_heap);
 634   xbt_swag_free(cpu_modified_set);
 635 }
 636
 637 static void surf_cpu_model_init_internal()
 638 {
 639   s_surf_action_t action;
 640   s_surf_action_cpu_Cas01_t comp;
 641
 642   surf_cpu_model = surf_model_init();
 643
 644   cpu_running_action_set_that_does_not_need_being_checked =
 645       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 646
 647   surf_cpu_model->name = "cpu";
 648
 649   surf_cpu_model->action_unref = cpu_action_unref;
 650   surf_cpu_model->action_cancel = cpu_action_cancel;
 651   surf_cpu_model->action_state_set = cpu_action_state_set;
 652
 653   surf_cpu_model->model_private->resource_used = cpu_resource_used;
 654
 655   if (cpu_update_mechanism == UM_LAZY) {
 656     surf_cpu_model->model_private->share_resources =
 657         cpu_share_resources_lazy;
 658     surf_cpu_model->model_private->update_actions_state =
 659         cpu_update_actions_state_lazy;
 660   } else if (cpu_update_mechanism == UM_FULL) {
 661     surf_cpu_model->model_private->share_resources =
 662         cpu_share_resources_full;
 663     surf_cpu_model->model_private->update_actions_state =
 664         cpu_update_actions_state_full;
 665   } else
 666     xbt_die("Invalid update mechanism!");
 667
 668   surf_cpu_model->model_private->update_resource_state =
 669       cpu_update_resource_state;
 670   surf_cpu_model->model_private->finalize = cpu_finalize;
 671
 672   surf_cpu_model->suspend = cpu_action_suspend;
 673   surf_cpu_model->resume = cpu_action_resume;
 674   surf_cpu_model->is_suspended = cpu_action_is_suspended;
 675   surf_cpu_model->set_max_duration = cpu_action_set_max_duration;
 676   surf_cpu_model->set_priority = cpu_action_set_priority;
 677 #ifdef HAVE_TRACING
 678   surf_cpu_model->set_category = cpu_action_set_category;
 679 #endif
 680   surf_cpu_model->get_remains = cpu_action_get_remains;
 681
 682   surf_cpu_model->extension.cpu.execute = cpu_execute;
 683   surf_cpu_model->extension.cpu.sleep = cpu_action_sleep;
 684
 685   surf_cpu_model->extension.cpu.get_state = cpu_get_state;
 686   surf_cpu_model->extension.cpu.get_speed = cpu_get_speed;
 687   surf_cpu_model->extension.cpu.get_available_speed =
 688       cpu_get_available_speed;
 689   surf_cpu_model->extension.cpu.create_resource = cpu_create_resource;
 690   surf_cpu_model->extension.cpu.add_traces = cpu_add_traces_cpu;
 691
 692   if (!cpu_maxmin_system) {
 693     cpu_maxmin_system = lmm_system_new(cpu_selective_update);
 694   }
 695   if (cpu_update_mechanism == UM_LAZY) {
 696     cpu_action_heap = xbt_heap_new(8, NULL);
 697     xbt_heap_set_update_callback(cpu_action_heap,
 698         surf_action_lmm_update_index_heap);
 699     cpu_modified_set =
 700         xbt_swag_new(xbt_swag_offset(comp, generic_lmm_action.action_list_hookup));
 701     cpu_maxmin_system->keep_track = cpu_modified_set;
 702   }
 703 }
 704
 705 /*********************************************************************/
 706 /* Basic sharing model for CPU: that is where all this started... ;) */
 707 /*********************************************************************/
 708 /* @InProceedings{casanova01simgrid, */
 709 /*   author =       "H. Casanova", */
 710 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 711 /*                  and the Grid (CCGrid'01)", */
 712 /*   publisher =    "IEEE Computer Society", */
 713 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 714 /*                  Scheduling", */
 715 /*   year =         "2001", */
 716 /*   month =        may, */
 717 /*   note =         "Available at */
 718 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 719 /* } */
 720
 721 void surf_cpu_model_init_Cas01()
 722 {
 723   char *optim = xbt_cfg_get_string(_surf_cfg_set, "cpu/optim");
 724   int select =
 725       xbt_cfg_get_int(_surf_cfg_set, "cpu/maxmin_selective_update");
 726
 727   if (!strcmp(optim, "Full")) {
 728     cpu_update_mechanism = UM_FULL;
 729     cpu_selective_update = select;
 730   } else if (!strcmp(optim, "Lazy")) {
 731     cpu_update_mechanism = UM_LAZY;
 732     cpu_selective_update = 1;
 733     xbt_assert((select == 1)
 734                ||
 735                (xbt_cfg_is_default_value
 736                 (_surf_cfg_set, "cpu/maxmin_selective_update")),
 737                "Disabling selective update while using the lazy update mechanism is dumb!");
 738   } else if (!strcmp(optim, "TI")) {
 739     surf_cpu_model_init_ti();
 740     return;
 741   } else {
 742     xbt_die("Unsupported optimization (%s) for this model", optim);
 743   }
 744
 745   if (surf_cpu_model)
 746     return;
 747   surf_cpu_model_init_internal();
 748   cpu_define_callbacks();
 749   xbt_dynar_push(model_list, &surf_cpu_model);
 750 }