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
  10 surf_model_t surf_cpu_model = NULL;
  11 lmm_system_t cpu_maxmin_system = NULL;
  12 e_UM_t cpu_update_mechanism = UM_UNDEFINED;
  13 static xbt_swag_t cpu_modified_cpu = NULL;
  14 static xbt_heap_t cpu_action_heap = NULL;
  15 extern int sg_maxmin_selective_update;
  16
  17 #undef GENERIC_LMM_ACTION
  18 #undef GENERIC_ACTION
  19 #undef ACTION_GET_CPU
  20 #define GENERIC_LMM_ACTION(action) action->generic_lmm_action
  21 #define GENERIC_ACTION(action) GENERIC_LMM_ACTION(action).generic_action
  22 #define ACTION_GET_CPU(action) ((surf_action_cpu_Cas01_t) action)->cpu
  23
  24 typedef struct surf_action_cpu_cas01 {
  25   s_surf_action_lmm_t generic_lmm_action;
  26   s_xbt_swag_hookup_t cpu_list_hookup;
  27   int index_heap;
  28   void *cpu;
  29 } s_surf_action_cpu_Cas01_t, *surf_action_cpu_Cas01_t;
  30
  31 typedef struct cpu_Cas01 {
  32   s_surf_resource_t generic_resource;
  33   s_xbt_swag_hookup_t modified_cpu_hookup;
  34   double power_peak;
  35   double power_scale;
  36   tmgr_trace_event_t power_event;
  37   int core;
  38   e_surf_resource_state_t state_current;
  39   tmgr_trace_event_t state_event;
  40   lmm_constraint_t constraint;
  41   xbt_swag_t action_set;
  42   double last_update;
  43 } s_cpu_Cas01_t, *cpu_Cas01_t;
  44
  45 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu, surf,
  46                                 "Logging specific to the SURF CPU IMPROVED module");
  47
  48
  49
  50 static xbt_swag_t
  51     cpu_running_action_set_that_does_not_need_being_checked = NULL;
  52
  53 static void* cpu_create_resource(const char *name, double power_peak,
  54                                  double power_scale,
  55                                  tmgr_trace_t power_trace,
  56                                  int core,
  57                                  e_surf_resource_state_t state_initial,
  58                                  tmgr_trace_t state_trace,
  59                                  xbt_dict_t cpu_properties)
  60 {
  61   cpu_Cas01_t cpu = NULL;
  62   s_surf_action_cpu_Cas01_t action;
  63
  64   xbt_assert(!surf_cpu_resource_by_name(name),
  65               "Host '%s' declared several times in the platform file",
  66               name);
  67   cpu = (cpu_Cas01_t) surf_resource_new(sizeof(s_cpu_Cas01_t),
  68           surf_cpu_model, name,cpu_properties);
  69   cpu->power_peak = power_peak;
  70   xbt_assert(cpu->power_peak > 0, "Power has to be >0");
  71   cpu->power_scale = power_scale;
  72   cpu->core = core;
  73   xbt_assert(core>0,"Invalid number of cores %d",core);
  74
  75   if (power_trace)
  76     cpu->power_event =
  77         tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
  78
  79   cpu->state_current = state_initial;
  80   if (state_trace)
  81     cpu->state_event =
  82         tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
  83
  84   cpu->constraint =
  85       lmm_constraint_new(cpu_maxmin_system, cpu,
  86                          cpu->core * cpu->power_scale * cpu->power_peak);
  87
  88   xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, cpu);
  89   if(cpu_update_mechanism == UM_LAZY)
  90     cpu->action_set = xbt_swag_new(xbt_swag_offset(action, cpu_list_hookup));
  91
  92   return cpu;
  93 }
  94
  95
  96 static void parse_cpu_init(sg_platf_host_cbarg_t host)
  97 {
  98         cpu_create_resource(host->id,
  99                           host->power_peak,
 100                           host->power_scale,
 101                           host->power_trace,
 102                           host->core_amount,
 103                           host->initial_state,
 104                           host->state_trace,
 105                           host->properties);
 106 }
 107
 108 static void cpu_add_traces_cpu(void)
 109 {
 110   xbt_dict_cursor_t cursor = NULL;
 111   char *trace_name, *elm;
 112   static int called = 0;
 113   if (called)
 114     return;
 115   called = 1;
 116
 117   /* connect all traces relative to hosts */
 118   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 119     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 120     cpu_Cas01_t host = surf_cpu_resource_by_name(elm);
 121
 122     xbt_assert(host, "Host %s undefined", elm);
 123     xbt_assert(trace, "Trace %s undefined", trace_name);
 124
 125     host->state_event =
 126         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 127   }
 128
 129   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 130     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 131     cpu_Cas01_t host = surf_cpu_resource_by_name(elm);
 132
 133     xbt_assert(host, "Host %s undefined", elm);
 134     xbt_assert(trace, "Trace %s undefined", trace_name);
 135
 136     host->power_event =
 137         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 138   }
 139 }
 140
 141 static void cpu_define_callbacks()
 142 {
 143   sg_platf_host_add_cb(parse_cpu_init);
 144   sg_platf_postparse_add_cb(cpu_add_traces_cpu);
 145 }
 146
 147 static int cpu_resource_used(void *resource)
 148 {
 149   return lmm_constraint_used(cpu_maxmin_system,
 150                              ((cpu_Cas01_t) resource)->constraint);
 151 }
 152
 153 static int cpu_action_unref(surf_action_t action)
 154 {
 155   action->refcount--;
 156   if (!action->refcount) {
 157     xbt_swag_remove(action, action->state_set);
 158     if (((surf_action_lmm_t) action)->variable)
 159       lmm_variable_free(cpu_maxmin_system,
 160                         ((surf_action_lmm_t) action)->variable);
 161     if(cpu_update_mechanism == UM_LAZY){
 162     /* remove from heap */
 163     xbt_heap_remove(cpu_action_heap,
 164                     ((surf_action_cpu_Cas01_t) action)->index_heap);
 165     xbt_swag_remove(action,
 166                     ((cpu_Cas01_t) ACTION_GET_CPU(action))->action_set);
 167     xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
 168     }
 169 #ifdef HAVE_TRACING
 170     xbt_free(action->category);
 171 #endif
 172     surf_action_free(&action);
 173     return 1;
 174   }
 175   return 0;
 176 }
 177
 178 static void cpu_action_cancel(surf_action_t action)
 179 {
 180   surf_action_state_set(action, SURF_ACTION_FAILED);
 181   if(cpu_update_mechanism == UM_LAZY){
 182   xbt_heap_remove(cpu_action_heap,
 183                   ((surf_action_cpu_Cas01_t) action)->index_heap);
 184   xbt_swag_remove(action,
 185                   ((cpu_Cas01_t) ACTION_GET_CPU(action))->action_set);
 186   }
 187   return;
 188 }
 189
 190 static void cpu_cpu_action_state_set(surf_action_t action,
 191                                         e_surf_action_state_t state)
 192 {
 193 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 194 /*     if(((surf_action_lmm_t)action)->variable) { */
 195 /*       lmm_variable_disable(cpu_maxmin_system, ((surf_action_lmm_t)action)->variable); */
 196 /*       ((surf_action_lmm_t)action)->variable = NULL; */
 197 /*     } */
 198
 199   surf_action_state_set(action, state);
 200   return;
 201 }
 202
 203 static void cpu_update_remains(cpu_Cas01_t cpu, double now)
 204 {
 205   surf_action_cpu_Cas01_t action;
 206
 207   if (cpu->last_update >= now)
 208     return;
 209   xbt_swag_foreach(action, cpu->action_set) {
 210     if (GENERIC_ACTION(action).state_set !=
 211         surf_cpu_model->states.running_action_set)
 212       continue;
 213
 214     /* bogus priority, skip it */
 215     if (GENERIC_ACTION(action).priority <= 0)
 216       continue;
 217
 218     if (GENERIC_ACTION(action).remains > 0) {
 219       double_update(&(GENERIC_ACTION(action).remains),
 220                     lmm_variable_getvalue(GENERIC_LMM_ACTION
 221                                           (action).variable) * (now -
 222                                                                 cpu->last_update));
 223 #ifdef HAVE_TRACING
 224       if (TRACE_is_enabled()) {
 225         TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 226                                         action->
 227                                         generic_lmm_action.generic_action.
 228                                         data, (surf_action_t) action,
 229                                         lmm_variable_getvalue
 230                                         (GENERIC_LMM_ACTION
 231                                          (action).variable),
 232                                         cpu->last_update,
 233                                         now - cpu->last_update);
 234       }
 235 #endif
 236       XBT_DEBUG("Update action(%p) remains %lf", action,
 237              GENERIC_ACTION(action).remains);
 238     }
 239   }
 240   cpu->last_update = now;
 241 }
 242
 243 static double cpu_share_resources_lazy(double now)
 244 {
 245   surf_action_cpu_Cas01_t action;
 246   double min;
 247   double value;
 248   cpu_Cas01_t cpu, cpu_next;
 249
 250   xbt_swag_foreach(cpu, cpu_modified_cpu)
 251       cpu_update_remains(cpu, now);
 252
 253   lmm_solve(cpu_maxmin_system);
 254
 255   xbt_swag_foreach_safe(cpu, cpu_next, cpu_modified_cpu) {
 256     xbt_swag_foreach(action, cpu->action_set) {
 257       if (GENERIC_ACTION(action).state_set !=
 258           surf_cpu_model->states.running_action_set)
 259         continue;
 260
 261       /* bogus priority, skip it */
 262       if (GENERIC_ACTION(action).priority <= 0)
 263         continue;
 264
 265       min = -1;
 266       value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 267       if (value > 0) {
 268         if (GENERIC_ACTION(action).remains > 0) {
 269           value = GENERIC_ACTION(action).remains / value;
 270           min = now + value;
 271         } else {
 272           value = 0.0;
 273           min = now;
 274         }
 275       }
 276
 277       if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 278           && (min == -1
 279               || GENERIC_ACTION(action).start +
 280               GENERIC_ACTION(action).max_duration < min))
 281         min =
 282             GENERIC_ACTION(action).start +
 283             GENERIC_ACTION(action).max_duration;
 284
 285       XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 286              GENERIC_ACTION(action).start, now + value,
 287              GENERIC_ACTION(action).max_duration);
 288
 289       if (action->index_heap >= 0) {
 290         surf_action_cpu_Cas01_t heap_act =
 291             xbt_heap_remove(cpu_action_heap, action->index_heap);
 292         if (heap_act != action)
 293           DIE_IMPOSSIBLE;
 294       }
 295       if (min != -1) {
 296         xbt_heap_push(cpu_action_heap, action, min);
 297         XBT_DEBUG("Insert at heap action(%p) min %lf", action, min);
 298       }
 299     }
 300     xbt_swag_remove(cpu, cpu_modified_cpu);
 301   }
 302   return xbt_heap_size(cpu_action_heap) >
 303       0 ? xbt_heap_maxkey(cpu_action_heap) - now : -1;
 304 }
 305
 306 static double cpu_share_resources_full(double now) {
 307   surf_action_cpu_Cas01_t action;
 308   return generic_maxmin_share_resources(surf_cpu_model->states.running_action_set,
 309       xbt_swag_offset(*action, generic_lmm_action.variable),
 310       cpu_maxmin_system, lmm_solve);
 311 }
 312
 313 static void cpu_update_actions_state_lazy(double now, double delta)
 314 {
 315   surf_action_cpu_Cas01_t action;
 316   while ((xbt_heap_size(cpu_action_heap) > 0)
 317          && (double_equals(xbt_heap_maxkey(cpu_action_heap), now))) {
 318     action = xbt_heap_pop(cpu_action_heap);
 319     XBT_DEBUG("Action %p: finish", action);
 320     GENERIC_ACTION(action).finish = surf_get_clock();
 321     /* set the remains to 0 due to precision problems when updating the remaining amount */
 322 #ifdef HAVE_TRACING
 323     if (TRACE_is_enabled()) {
 324       cpu_Cas01_t cpu = ((cpu_Cas01_t)(action->cpu));
 325       TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 326           GENERIC_LMM_ACTION(action).generic_action.data,
 327           (surf_action_t) action,
 328           lmm_variable_getvalue (GENERIC_LMM_ACTION(action).variable),
 329           cpu->last_update,
 330           now - cpu->last_update);
 331     }
 332 #endif
 333     GENERIC_ACTION(action).remains = 0;
 334     cpu_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 335     cpu_update_remains(action->cpu, surf_get_clock());
 336   }
 337 #ifdef HAVE_TRACING
 338   if (TRACE_is_enabled()) {
 339     //defining the last timestamp that we can safely dump to trace file
 340     //without losing the event ascending order (considering all CPU's)
 341     void **data;
 342     cpu_Cas01_t cpu;
 343     xbt_lib_cursor_t cursor;
 344     char *key;
 345     double smaller = -1;
 346     xbt_lib_foreach(host_lib, cursor, key, data){
 347       if(data[SURF_CPU_LEVEL]){
 348         cpu = data[SURF_CPU_LEVEL];
 349         if (smaller < 0){
 350           smaller = cpu->last_update;
 351           continue;
 352         }
 353         if (cpu->last_update < smaller){
 354           smaller = cpu->last_update;
 355         }
 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, GENERIC_LMM_ACTION(action).variable, 0));
 377
 378       TRACE_surf_host_set_utilization(x->generic_resource.name,
 379                                       GENERIC_ACTION(action).data,
 380                                       (surf_action_t) action,
 381                                       lmm_variable_getvalue
 382                                       (GENERIC_LMM_ACTION(action).variable), now - delta,
 383                                       delta);
 384       TRACE_last_timestamp_to_dump = now-delta;
 385     }
 386 #endif
 387     double_update(&(GENERIC_ACTION(action).remains),
 388                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * delta);
 389     if (GENERIC_LMM_ACTION(action).generic_action.max_duration != NO_MAX_DURATION)
 390       double_update(&(GENERIC_ACTION(action).max_duration), delta);
 391     if ((GENERIC_ACTION(action).remains <= 0) &&
 392         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 393       GENERIC_ACTION(action).finish = surf_get_clock();
 394       cpu_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 395     } else if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION) &&
 396                (GENERIC_ACTION(action).max_duration <= 0)) {
 397       GENERIC_ACTION(action).finish = surf_get_clock();
 398       cpu_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 399     }
 400   }
 401
 402   return;
 403 }
 404
 405 static void cpu_update_resource_state(void *id,
 406                                          tmgr_trace_event_t event_type,
 407                                          double value, double date)
 408 {
 409   cpu_Cas01_t cpu = id;
 410   lmm_variable_t var = NULL;
 411   lmm_element_t elem = NULL;
 412
 413   if (event_type == cpu->power_event) {
 414     cpu->power_scale = value;
 415     lmm_update_constraint_bound(cpu_maxmin_system, cpu->constraint,
 416                                 cpu->core * cpu->power_scale * cpu->power_peak);
 417 #ifdef HAVE_TRACING
 418     TRACE_surf_host_set_power(date, cpu->generic_resource.name,
 419                               cpu->core * cpu->power_scale * cpu->power_peak);
 420 #endif
 421     while ((var = lmm_get_var_from_cnst
 422             (cpu_maxmin_system, cpu->constraint, &elem))) {
 423         surf_action_cpu_Cas01_t action = lmm_variable_id(var);
 424         lmm_update_variable_bound(cpu_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 425                                   cpu->power_scale * cpu->power_peak);
 426     }
 427     if(cpu_update_mechanism == UM_LAZY)
 428       xbt_swag_insert(cpu, cpu_modified_cpu);
 429     if (tmgr_trace_event_free(event_type))
 430       cpu->power_event = NULL;
 431   } else if (event_type == cpu->state_event) {
 432     if (value > 0)
 433       cpu->state_current = SURF_RESOURCE_ON;
 434     else {
 435       lmm_constraint_t cnst = cpu->constraint;
 436       lmm_variable_t var = NULL;
 437       lmm_element_t elem = NULL;
 438
 439       cpu->state_current = SURF_RESOURCE_OFF;
 440
 441       while ((var =
 442               lmm_get_var_from_cnst(cpu_maxmin_system, cnst, &elem))) {
 443         surf_action_t action = lmm_variable_id(var);
 444
 445         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 446             surf_action_state_get(action) == SURF_ACTION_READY ||
 447             surf_action_state_get(action) ==
 448             SURF_ACTION_NOT_IN_THE_SYSTEM) {
 449           action->finish = date;
 450           cpu_cpu_action_state_set(action, SURF_ACTION_FAILED);
 451         }
 452       }
 453     }
 454     if (tmgr_trace_event_free(event_type))
 455       cpu->state_event = NULL;
 456   } else {
 457     XBT_CRITICAL("Unknown event ! \n");
 458     xbt_abort();
 459   }
 460
 461   return;
 462 }
 463
 464 static surf_action_t cpu_execute(void *cpu, double size)
 465 {
 466   surf_action_cpu_Cas01_t action = NULL;
 467   cpu_Cas01_t CPU = cpu;
 468
 469   XBT_IN("(%s,%g)", surf_resource_name(CPU), size);
 470   action =
 471       surf_action_new(sizeof(s_surf_action_cpu_Cas01_t), size,
 472                       surf_cpu_model,
 473                       CPU->state_current != SURF_RESOURCE_ON);
 474
 475   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 476                                                    calloc but it seems to help valgrind... */
 477
 478   GENERIC_LMM_ACTION(action).variable =
 479       lmm_variable_new(cpu_maxmin_system, action,
 480                        GENERIC_ACTION(action).priority, CPU->power_scale * CPU->power_peak, 1);
 481   if(cpu_update_mechanism == UM_LAZY){
 482     action->index_heap = -1;
 483     action->cpu = CPU;
 484     xbt_swag_insert(CPU, cpu_modified_cpu);
 485     xbt_swag_insert(action, CPU->action_set);
 486   }
 487   lmm_expand(cpu_maxmin_system, CPU->constraint,
 488              GENERIC_LMM_ACTION(action).variable, 1.0);
 489   XBT_OUT();
 490   return (surf_action_t) action;
 491 }
 492
 493 static surf_action_t cpu_action_sleep(void *cpu, double duration)
 494 {
 495   surf_action_cpu_Cas01_t action = NULL;
 496
 497   if (duration > 0)
 498     duration = MAX(duration, MAXMIN_PRECISION);
 499
 500   XBT_IN("(%s,%g)", surf_resource_name(cpu), duration);
 501   action = (surf_action_cpu_Cas01_t) cpu_execute(cpu, 1.0);
 502   GENERIC_ACTION(action).max_duration = duration;
 503   GENERIC_LMM_ACTION(action).suspended = 2;
 504   if (duration == NO_MAX_DURATION) {
 505     /* Move to the *end* of the corresponding action set. This convention
 506        is used to speed up update_resource_state  */
 507     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 508     ((surf_action_t) action)->state_set =
 509         cpu_running_action_set_that_does_not_need_being_checked;
 510     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 511   }
 512
 513   lmm_update_variable_weight(cpu_maxmin_system,
 514                              GENERIC_LMM_ACTION(action).variable, 0.0);
 515   if(cpu_update_mechanism == UM_LAZY)
 516     xbt_swag_insert(cpu, cpu_modified_cpu);
 517   XBT_OUT();
 518   return (surf_action_t) action;
 519 }
 520
 521 static void cpu_action_suspend(surf_action_t action)
 522 {
 523   XBT_IN("(%p)", action);
 524   if (((surf_action_lmm_t) action)->suspended != 2) {
 525     lmm_update_variable_weight(cpu_maxmin_system,
 526                                ((surf_action_lmm_t) action)->variable,
 527                                0.0);
 528     ((surf_action_lmm_t) action)->suspended = 1;
 529     if(cpu_update_mechanism == UM_LAZY){
 530       xbt_heap_remove(cpu_action_heap,
 531                       ((surf_action_cpu_Cas01_t) action)->index_heap);
 532       xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
 533     }
 534   }
 535   XBT_OUT();
 536 }
 537
 538 static void cpu_action_resume(surf_action_t action)
 539 {
 540
 541   XBT_IN("(%p)", action);
 542   if (((surf_action_lmm_t) action)->suspended != 2) {
 543     lmm_update_variable_weight(cpu_maxmin_system,
 544                                ((surf_action_lmm_t) action)->variable,
 545                                action->priority);
 546     ((surf_action_lmm_t) action)->suspended = 0;
 547     if(cpu_update_mechanism == UM_LAZY)
 548       xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
 549   }
 550   XBT_OUT();
 551 }
 552
 553 static int cpu_action_is_suspended(surf_action_t action)
 554 {
 555   return (((surf_action_lmm_t) action)->suspended == 1);
 556 }
 557
 558 static void cpu_action_set_max_duration(surf_action_t action,
 559                                            double duration)
 560 {
 561   XBT_IN("(%p,%g)", action, duration);
 562
 563   action->max_duration = duration;
 564   /* insert cpu in modified_cpu set to notice the max duration change */
 565   if(cpu_update_mechanism == UM_LAZY)
 566     xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
 567   XBT_OUT();
 568 }
 569
 570 static void cpu_action_set_priority(surf_action_t action,
 571                                        double priority)
 572 {
 573   XBT_IN("(%p,%g)", action, priority);
 574   action->priority = priority;
 575   lmm_update_variable_weight(cpu_maxmin_system,
 576                              ((surf_action_lmm_t) action)->variable,
 577                              priority);
 578
 579   if(cpu_update_mechanism == UM_LAZY)
 580     xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
 581   XBT_OUT();
 582 }
 583
 584 #ifdef HAVE_TRACING
 585 static void cpu_action_set_category(surf_action_t action,
 586                                        const char *category)
 587 {
 588   XBT_IN("(%p,%s)", action, category);
 589   action->category = xbt_strdup (category);
 590   XBT_OUT();
 591 }
 592 #endif
 593
 594 static double cpu_action_get_remains(surf_action_t action)
 595 {
 596   XBT_IN("(%p)", action);
 597   /* update remains before return it */
 598   if(cpu_update_mechanism == UM_LAZY)
 599     cpu_update_remains(ACTION_GET_CPU(action), surf_get_clock());
 600   return action->remains;
 601   XBT_OUT();
 602 }
 603
 604 static e_surf_resource_state_t cpu_get_state(void *cpu)
 605 {
 606   return ((cpu_Cas01_t) cpu)->state_current;
 607 }
 608
 609 static double cpu_get_speed(void *cpu, double load)
 610 {
 611   return load * (((cpu_Cas01_t) cpu)->power_peak);
 612 }
 613
 614 static double cpu_get_available_speed(void *cpu)
 615 {
 616   /* number between 0 and 1 */
 617   return ((cpu_Cas01_t) cpu)->power_scale;
 618 }
 619
 620 static void cpu_action_update_index_heap(void *action, int i)
 621 {
 622   ((surf_action_cpu_Cas01_t) action)->index_heap = i;
 623 }
 624
 625 static void cpu_finalize(void)
 626 {
 627   void **cpu;
 628   xbt_lib_cursor_t cursor;
 629   char *key;
 630
 631   xbt_lib_foreach(host_lib, cursor, key, cpu){
 632     if(cpu[SURF_CPU_LEVEL])
 633     {
 634         cpu_Cas01_t CPU = cpu[SURF_CPU_LEVEL];
 635         xbt_swag_free(CPU->action_set);
 636     }
 637   }
 638
 639   lmm_system_free(cpu_maxmin_system);
 640   cpu_maxmin_system = NULL;
 641
 642   surf_model_exit(surf_cpu_model);
 643   surf_cpu_model = NULL;
 644
 645   xbt_swag_free
 646       (cpu_running_action_set_that_does_not_need_being_checked);
 647   cpu_running_action_set_that_does_not_need_being_checked = NULL;
 648   if(cpu_action_heap)  xbt_heap_free(cpu_action_heap);
 649   if(cpu_modified_cpu) xbt_swag_free(cpu_modified_cpu);
 650 }
 651
 652 static void surf_cpu_model_init_internal(const char* name)
 653 {
 654   s_surf_action_t action;
 655   s_cpu_Cas01_t cpu;
 656
 657   surf_cpu_model = surf_model_init();
 658
 659   cpu_running_action_set_that_does_not_need_being_checked =
 660       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 661
 662   surf_cpu_model->name = name;
 663
 664   surf_cpu_model->action_unref = cpu_action_unref;
 665   surf_cpu_model->action_cancel = cpu_action_cancel;
 666   surf_cpu_model->action_state_set = cpu_cpu_action_state_set;
 667
 668   surf_cpu_model->model_private->resource_used = cpu_resource_used;
 669
 670   if(cpu_update_mechanism == UM_LAZY) {
 671     surf_cpu_model->model_private->share_resources = cpu_share_resources_lazy;
 672     surf_cpu_model->model_private->update_actions_state = cpu_update_actions_state_lazy;
 673   } else if (cpu_update_mechanism == UM_FULL) {
 674     surf_cpu_model->model_private->share_resources = cpu_share_resources_full;
 675     surf_cpu_model->model_private->update_actions_state = cpu_update_actions_state_full;
 676   } else
 677     xbt_die("Invalid update mechanism!");
 678
 679   surf_cpu_model->model_private->update_resource_state =
 680       cpu_update_resource_state;
 681   surf_cpu_model->model_private->finalize = cpu_finalize;
 682
 683   surf_cpu_model->suspend = cpu_action_suspend;
 684   surf_cpu_model->resume = cpu_action_resume;
 685   surf_cpu_model->is_suspended = cpu_action_is_suspended;
 686   surf_cpu_model->set_max_duration = cpu_action_set_max_duration;
 687   surf_cpu_model->set_priority = cpu_action_set_priority;
 688 #ifdef HAVE_TRACING
 689   surf_cpu_model->set_category = cpu_action_set_category;
 690 #endif
 691   surf_cpu_model->get_remains = cpu_action_get_remains;
 692
 693   surf_cpu_model->extension.cpu.execute = cpu_execute;
 694   surf_cpu_model->extension.cpu.sleep = cpu_action_sleep;
 695
 696   surf_cpu_model->extension.cpu.get_state = cpu_get_state;
 697   surf_cpu_model->extension.cpu.get_speed = cpu_get_speed;
 698   surf_cpu_model->extension.cpu.get_available_speed =
 699       cpu_get_available_speed;
 700   surf_cpu_model->extension.cpu.create_resource = cpu_create_resource;
 701   surf_cpu_model->extension.cpu.add_traces = cpu_add_traces_cpu;
 702
 703   if (!cpu_maxmin_system) {
 704     sg_maxmin_selective_update = 1;
 705     cpu_maxmin_system = lmm_system_new();
 706   }
 707   if(cpu_update_mechanism == UM_LAZY){
 708     cpu_action_heap = xbt_heap_new(8, NULL);
 709     xbt_heap_set_update_callback(cpu_action_heap,
 710                                  cpu_action_update_index_heap);
 711     cpu_modified_cpu =
 712         xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
 713   }
 714 }
 715
 716 /*********************************************************************/
 717 /* Basic sharing model for CPU: that is where all this started... ;) */
 718 /*********************************************************************/
 719 /* @InProceedings{casanova01simgrid, */
 720 /*   author =       "H. Casanova", */
 721 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 722 /*                  and the Grid (CCGrid'01)", */
 723 /*   publisher =    "IEEE Computer Society", */
 724 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 725 /*                  Scheduling", */
 726 /*   year =         "2001", */
 727 /*   month =        may, */
 728 /*   note =         "Available at */
 729 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 730 /* } */
 731
 732 void surf_cpu_model_init_Cas01()
 733 {
 734   char *optim = xbt_cfg_get_string(_surf_cfg_set, "cpu/optim");
 735   char *model = xbt_cfg_get_string(_surf_cfg_set, "cpu/model");
 736
 737   if(!strcmp(model,"Cas01_fullupdate")) {
 738     XBT_WARN("[*Deprecated*. Use --cfg=cpu/model:Cas01 with option --cfg=cpu/optim:Full instead.]");
 739   } else if(!strcmp(model,"CpuTI")) {
 740     XBT_WARN("[*Deprecated*. Use --cfg=cpu/model:Cas01 with option --cfg=cpu/optim:TI instead.]");
 741   }
 742
 743   if(!strcmp(optim,"Full")) {
 744     cpu_update_mechanism = UM_FULL;
 745   } else if (!strcmp(optim,"Lazy")) {
 746     cpu_update_mechanism = UM_LAZY;
 747   } else if (!strcmp(optim,"TI")) {
 748     surf_cpu_model_init_ti();
 749     return;
 750   } else {
 751     xbt_die("Unsupported optimization (%s) for this model",optim);
 752   }
 753
 754   if (surf_cpu_model)
 755     return;
 756   surf_cpu_model_init_internal("CPU");
 757   cpu_define_callbacks();
 758   xbt_dynar_push(model_list, &surf_cpu_model);
 759 }