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_xbt_swag_hookup_t action_list_hookup;
  29   int index_heap;
  30   double last_update;
  31   enum heap_action_type hat;
  32 } s_surf_action_cpu_Cas01_t, *surf_action_cpu_Cas01_t;
  33
  34 typedef struct cpu_Cas01 {
  35   s_surf_resource_t generic_resource;
  36   s_xbt_swag_hookup_t modified_cpu_hookup;
  37   double power_peak;
  38   double power_scale;
  39   tmgr_trace_event_t power_event;
  40   int core;
  41   e_surf_resource_state_t state_current;
  42   tmgr_trace_event_t state_event;
  43   lmm_constraint_t constraint;
  44 } s_cpu_Cas01_t, *cpu_Cas01_t;
  45
  46 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu, surf,
  47                                 "Logging specific to the SURF CPU IMPROVED module");
  48
  49
  50
  51 static xbt_swag_t
  52     cpu_running_action_set_that_does_not_need_being_checked = NULL;
  53
  54 /* added to manage the communication action's heap */
  55 static void net_action_update_index_heap(void *action, int i)
  56 {
  57   ((surf_action_cpu_Cas01_t) action)->index_heap = i;
  58 }
  59
  60 /* insert action on heap using a given key and a hat (heap_action_type)
  61  * a hat can be of three types for communications:
  62  *
  63  * NORMAL = this is a normal heap entry stating the date to finish transmitting
  64  * LATENCY = this is a heap entry to warn us when the latency is payed
  65  * MAX_DURATION =this is a heap entry to warn us when the max_duration limit is reached
  66  */
  67 static void heap_insert(surf_action_cpu_Cas01_t action, double key,
  68                         enum heap_action_type hat)
  69 {
  70   action->hat = hat;
  71   xbt_heap_push(cpu_action_heap, action, key);
  72 }
  73
  74 static void heap_remove(surf_action_cpu_Cas01_t action)
  75 {
  76   action->hat = NOTSET;
  77   if (((surf_action_cpu_Cas01_t) action)->index_heap >= 0) {
  78     xbt_heap_remove(cpu_action_heap, action->index_heap);
  79   }
  80 }
  81
  82 static void *cpu_create_resource(const char *name, double power_peak,
  83                                  double power_scale,
  84                                  tmgr_trace_t power_trace,
  85                                  int core,
  86                                  e_surf_resource_state_t state_initial,
  87                                  tmgr_trace_t state_trace,
  88                                  xbt_dict_t cpu_properties)
  89 {
  90   cpu_Cas01_t cpu = NULL;
  91
  92   xbt_assert(!surf_cpu_resource_by_name(name),
  93              "Host '%s' declared several times in the platform file",
  94              name);
  95   cpu = (cpu_Cas01_t) surf_resource_new(sizeof(s_cpu_Cas01_t),
  96                                         surf_cpu_model, name,
  97                                         cpu_properties);
  98   cpu->power_peak = power_peak;
  99   xbt_assert(cpu->power_peak > 0, "Power has to be >0");
 100   cpu->power_scale = power_scale;
 101   cpu->core = core;
 102   xbt_assert(core > 0, "Invalid number of cores %d", core);
 103
 104   if (power_trace)
 105     cpu->power_event =
 106         tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
 107
 108   cpu->state_current = state_initial;
 109   if (state_trace)
 110     cpu->state_event =
 111         tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
 112
 113   cpu->constraint =
 114       lmm_constraint_new(cpu_maxmin_system, cpu,
 115                          cpu->core * cpu->power_scale * cpu->power_peak);
 116
 117   xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, cpu);
 118
 119   return cpu;
 120 }
 121
 122
 123 static void parse_cpu_init(sg_platf_host_cbarg_t host)
 124 {
 125   cpu_create_resource(host->id,
 126                       host->power_peak,
 127                       host->power_scale,
 128                       host->power_trace,
 129                       host->core_amount,
 130                       host->initial_state,
 131                       host->state_trace, host->properties);
 132 }
 133
 134 static void cpu_add_traces_cpu(void)
 135 {
 136   xbt_dict_cursor_t cursor = NULL;
 137   char *trace_name, *elm;
 138   static int called = 0;
 139   if (called)
 140     return;
 141   called = 1;
 142
 143   /* connect all traces relative to hosts */
 144   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 145     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 146     cpu_Cas01_t host = surf_cpu_resource_by_name(elm);
 147
 148     xbt_assert(host, "Host %s undefined", elm);
 149     xbt_assert(trace, "Trace %s undefined", trace_name);
 150
 151     host->state_event =
 152         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 153   }
 154
 155   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 156     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 157     cpu_Cas01_t host = surf_cpu_resource_by_name(elm);
 158
 159     xbt_assert(host, "Host %s undefined", elm);
 160     xbt_assert(trace, "Trace %s undefined", trace_name);
 161
 162     host->power_event =
 163         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 164   }
 165 }
 166
 167 static void cpu_define_callbacks()
 168 {
 169   sg_platf_host_add_cb(parse_cpu_init);
 170   sg_platf_postparse_add_cb(cpu_add_traces_cpu);
 171 }
 172
 173 static int cpu_resource_used(void *resource)
 174 {
 175   return lmm_constraint_used(cpu_maxmin_system,
 176                              ((cpu_Cas01_t) resource)->constraint);
 177 }
 178
 179 static int cpu_action_unref(surf_action_t action)
 180 {
 181   action->refcount--;
 182   if (!action->refcount) {
 183     xbt_swag_remove(action, action->state_set);
 184     if (((surf_action_lmm_t) action)->variable)
 185       lmm_variable_free(cpu_maxmin_system,
 186                         ((surf_action_lmm_t) action)->variable);
 187     if (cpu_update_mechanism == UM_LAZY) {
 188       /* remove from heap */
 189       heap_remove((surf_action_cpu_Cas01_t) action);
 190       xbt_swag_remove(action, cpu_modified_set);
 191     }
 192 #ifdef HAVE_TRACING
 193     xbt_free(action->category);
 194 #endif
 195     surf_action_free(&action);
 196     return 1;
 197   }
 198   return 0;
 199 }
 200
 201 static void cpu_action_cancel(surf_action_t action)
 202 {
 203   surf_action_state_set(action, SURF_ACTION_FAILED);
 204   if (cpu_update_mechanism == UM_LAZY) {
 205     xbt_swag_remove(action, cpu_modified_set);
 206     heap_remove((surf_action_cpu_Cas01_t) action);
 207   }
 208   return;
 209 }
 210
 211 static void cpu_action_state_set(surf_action_t action,
 212                                      e_surf_action_state_t state)
 213 {
 214 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 215 /*     if(((surf_action_lmm_t)action)->variable) { */
 216 /*       lmm_variable_disable(cpu_maxmin_system, ((surf_action_lmm_t)action)->variable); */
 217 /*       ((surf_action_lmm_t)action)->variable = NULL; */
 218 /*     } */
 219
 220   surf_action_state_set(action, state);
 221   return;
 222 }
 223
 224 static void update_action_remaining_lazy(double now)
 225 {
 226   surf_action_cpu_Cas01_t action;
 227   double delta = 0.0;
 228
 229   xbt_swag_foreach(action, cpu_modified_set) {
 230     if (GENERIC_ACTION(action).state_set !=
 231         surf_cpu_model->states.running_action_set)
 232       continue; // FIXME useless ????
 233
 234     /* bogus priority, skip it */
 235     if (GENERIC_ACTION(action).priority <= 0)
 236       continue;
 237
 238     delta = now - action->last_update;
 239     if (GENERIC_ACTION(action).remains > 0) {
 240
 241       double_update(&(GENERIC_ACTION(action).remains),
 242                     lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * delta);
 243
 244 #ifdef HAVE_TRACING
 245       if (TRACE_is_enabled()) {
 246         TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 247                                         action->generic_lmm_action.
 248                                         generic_action.data,
 249                                         (surf_action_t) action,
 250                                         lmm_variable_getvalue
 251                                         (GENERIC_LMM_ACTION(action).
 252                                          variable), cpu->last_update,
 253                                         now - cpu->last_update);
 254       }
 255 #endif
 256       XBT_DEBUG("Update action(%p) remains %lf", action,
 257                 GENERIC_ACTION(action).remains);
 258     }
 259     action->last_update = now;
 260   }
 261
 262 }
 263
 264 static double cpu_share_resources_lazy(double now)
 265 {
 266   surf_action_cpu_Cas01_t action = NULL;
 267   double min = -1;
 268   double value;
 269
 270   XBT_DEBUG
 271       ("Before share resources, the size of modified actions set is %d",
 272        xbt_swag_size(cpu_modified_set));
 273   update_action_remaining_lazy(now);
 274
 275   lmm_solve(cpu_maxmin_system);
 276
 277   XBT_DEBUG
 278       ("After share resources, The size of modified actions set is %d",
 279        xbt_swag_size(cpu_modified_set));
 280
 281   xbt_swag_foreach(action, cpu_modified_set) {
 282     int max_dur_flag = 0;
 283
 284     if (GENERIC_ACTION(action).state_set !=
 285         surf_cpu_model->states.running_action_set)
 286       continue;
 287
 288     /* bogus priority, skip it */
 289     if (GENERIC_ACTION(action).priority <= 0)
 290       continue;
 291
 292     min = -1;
 293     value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 294     if (value > 0) {
 295       if (GENERIC_ACTION(action).remains > 0) {
 296         value = GENERIC_ACTION(action).remains / value;
 297         min = now + value;
 298       } else {
 299         value = 0.0;
 300         min = now;
 301       }
 302     }
 303
 304     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 305         && (min == -1
 306             || GENERIC_ACTION(action).start +
 307             GENERIC_ACTION(action).max_duration < min)) {
 308       min = GENERIC_ACTION(action).start +
 309           GENERIC_ACTION(action).max_duration;
 310       max_dur_flag = 1;
 311     }
 312
 313     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 314         GENERIC_ACTION(action).start, now + value,
 315         GENERIC_ACTION(action).max_duration);
 316
 317     if (min != -1) {
 318       heap_remove(action);
 319       heap_insert(action, min, max_dur_flag ? MAX_DURATION : NORMAL);
 320       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 321                 now);
 322     } else DIE_IMPOSSIBLE;
 323   }
 324
 325   //hereafter must have already the min value for this resource model
 326   if (xbt_heap_size(cpu_action_heap) > 0)
 327     min = xbt_heap_maxkey(cpu_action_heap) - now;
 328   else
 329     min = -1;
 330
 331   XBT_DEBUG("The minimum with the HEAP %lf", min);
 332
 333   return min;
 334 }
 335
 336 static double cpu_share_resources_full(double now)
 337 {
 338   s_surf_action_cpu_Cas01_t action;
 339   return generic_maxmin_share_resources(surf_cpu_model->states.
 340                                         running_action_set,
 341                                         xbt_swag_offset(action,
 342                                                         generic_lmm_action.
 343                                                         variable),
 344                                         cpu_maxmin_system, lmm_solve);
 345 }
 346
 347 static void cpu_update_actions_state_lazy(double now, double delta)
 348 {
 349   surf_action_cpu_Cas01_t action;
 350   while ((xbt_heap_size(cpu_action_heap) > 0)
 351          && (double_equals(xbt_heap_maxkey(cpu_action_heap), now))) {
 352     action = xbt_heap_pop(cpu_action_heap);
 353     XBT_DEBUG("Action %p: finish", action);
 354     GENERIC_ACTION(action).finish = surf_get_clock();
 355     /* set the remains to 0 due to precision problems when updating the remaining amount */
 356 #ifdef HAVE_TRACING
 357     if (TRACE_is_enabled()) {
 358       cpu_Cas01_t cpu = ((cpu_Cas01_t) (action->cpu));
 359       TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 360                                       GENERIC_LMM_ACTION(action).
 361                                       generic_action.data,
 362                                       (surf_action_t) action,
 363                                       lmm_variable_getvalue
 364                                       (GENERIC_LMM_ACTION(action).
 365                                        variable), cpu->last_update,
 366                                       now - cpu->last_update);
 367     }
 368 #endif
 369     GENERIC_ACTION(action).remains = 0;
 370     cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 371     heap_remove(action);
 372   }
 373 #ifdef HAVE_TRACING
 374   if (TRACE_is_enabled()) {
 375     //defining the last timestamp that we can safely dump to trace file
 376     //without losing the event ascending order (considering all CPU's)
 377     void **data;
 378     cpu_Cas01_t cpu;
 379     xbt_lib_cursor_t cursor;
 380     char *key;
 381     double smaller = -1;
 382     xbt_lib_foreach(host_lib, cursor, key, data) {
 383       if (data[SURF_CPU_LEVEL]) {
 384         cpu = data[SURF_CPU_LEVEL];
 385         if (smaller < 0) {
 386           smaller = cpu->last_update;
 387           continue;
 388         }
 389         if (cpu->last_update < smaller) {
 390           smaller = cpu->last_update;
 391         }
 392       }
 393     }
 394     if (smaller > 0) {
 395       TRACE_last_timestamp_to_dump = smaller;
 396     }
 397   }
 398 #endif
 399   return;
 400 }
 401
 402 static void cpu_update_actions_state_full(double now, double delta)
 403 {
 404   surf_action_cpu_Cas01_t action = NULL;
 405   surf_action_cpu_Cas01_t next_action = NULL;
 406   xbt_swag_t running_actions = surf_cpu_model->states.running_action_set;
 407   xbt_swag_foreach_safe(action, next_action, running_actions) {
 408 #ifdef HAVE_TRACING
 409     if (TRACE_is_enabled()) {
 410       cpu_Cas01_t x =
 411           lmm_constraint_id(lmm_get_cnst_from_var
 412                             (cpu_maxmin_system,
 413                              GENERIC_LMM_ACTION(action).variable, 0));
 414
 415       TRACE_surf_host_set_utilization(x->generic_resource.name,
 416                                       GENERIC_ACTION(action).data,
 417                                       (surf_action_t) action,
 418                                       lmm_variable_getvalue
 419                                       (GENERIC_LMM_ACTION(action).
 420                                        variable), now - delta, delta);
 421       TRACE_last_timestamp_to_dump = now - delta;
 422     }
 423 #endif
 424     double_update(&(GENERIC_ACTION(action).remains),
 425                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).
 426                                         variable) * delta);
 427     if (GENERIC_LMM_ACTION(action).generic_action.max_duration !=
 428         NO_MAX_DURATION)
 429       double_update(&(GENERIC_ACTION(action).max_duration), delta);
 430     if ((GENERIC_ACTION(action).remains <= 0) &&
 431         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) >
 432          0)) {
 433       GENERIC_ACTION(action).finish = surf_get_clock();
 434       cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 435     } else if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION) &&
 436                (GENERIC_ACTION(action).max_duration <= 0)) {
 437       GENERIC_ACTION(action).finish = surf_get_clock();
 438       cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 439     }
 440   }
 441
 442   return;
 443 }
 444
 445 static void cpu_update_resource_state(void *id,
 446                                       tmgr_trace_event_t event_type,
 447                                       double value, double date)
 448 {
 449   cpu_Cas01_t cpu = id;
 450   lmm_variable_t var = NULL;
 451   lmm_element_t elem = NULL;
 452
 453   if (event_type == cpu->power_event) {
 454     cpu->power_scale = value;
 455     lmm_update_constraint_bound(cpu_maxmin_system, cpu->constraint,
 456                                 cpu->core * cpu->power_scale *
 457                                 cpu->power_peak);
 458 #ifdef HAVE_TRACING
 459     TRACE_surf_host_set_power(date, cpu->generic_resource.name,
 460                               cpu->core * cpu->power_scale *
 461                               cpu->power_peak);
 462 #endif
 463     while ((var = lmm_get_var_from_cnst
 464             (cpu_maxmin_system, cpu->constraint, &elem))) {
 465       surf_action_cpu_Cas01_t action = lmm_variable_id(var);
 466       lmm_update_variable_bound(cpu_maxmin_system,
 467                                 GENERIC_LMM_ACTION(action).variable,
 468                                 cpu->power_scale * cpu->power_peak);
 469     }
 470     if (tmgr_trace_event_free(event_type))
 471       cpu->power_event = NULL;
 472   } else if (event_type == cpu->state_event) {
 473     if (value > 0)
 474       cpu->state_current = SURF_RESOURCE_ON;
 475     else {
 476       lmm_constraint_t cnst = cpu->constraint;
 477
 478       cpu->state_current = SURF_RESOURCE_OFF;
 479
 480       while ((var = lmm_get_var_from_cnst(cpu_maxmin_system, cnst, &elem))) {
 481         surf_action_t action = lmm_variable_id(var);
 482
 483         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 484             surf_action_state_get(action) == SURF_ACTION_READY ||
 485             surf_action_state_get(action) ==
 486             SURF_ACTION_NOT_IN_THE_SYSTEM) {
 487           action->finish = date;
 488           cpu_action_state_set(action, SURF_ACTION_FAILED);
 489         }
 490       }
 491     }
 492     if (tmgr_trace_event_free(event_type))
 493       cpu->state_event = NULL;
 494   } else {
 495     XBT_CRITICAL("Unknown event ! \n");
 496     xbt_abort();
 497   }
 498
 499   return;
 500 }
 501
 502 static surf_action_t cpu_execute(void *cpu, double size)
 503 {
 504   surf_action_cpu_Cas01_t action = NULL;
 505   cpu_Cas01_t CPU = cpu;
 506
 507   XBT_IN("(%s,%g)", surf_resource_name(CPU), size);
 508   action =
 509       surf_action_new(sizeof(s_surf_action_cpu_Cas01_t), size,
 510                       surf_cpu_model,
 511                       CPU->state_current != SURF_RESOURCE_ON);
 512
 513   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 514                                                    calloc but it seems to help valgrind... */
 515
 516   GENERIC_LMM_ACTION(action).variable =
 517       lmm_variable_new(cpu_maxmin_system, action,
 518                        GENERIC_ACTION(action).priority,
 519                        CPU->power_scale * CPU->power_peak, 1);
 520   if (cpu_update_mechanism == UM_LAZY) {
 521     action->index_heap = -1;
 522     action->last_update = surf_get_clock();
 523   }
 524   lmm_expand(cpu_maxmin_system, CPU->constraint,
 525              GENERIC_LMM_ACTION(action).variable, 1.0);
 526   XBT_OUT();
 527   return (surf_action_t) action;
 528 }
 529
 530 static surf_action_t cpu_action_sleep(void *cpu, double duration)
 531 {
 532   surf_action_cpu_Cas01_t action = NULL;
 533
 534   if (duration > 0)
 535     duration = MAX(duration, MAXMIN_PRECISION);
 536
 537   XBT_IN("(%s,%g)", surf_resource_name(cpu), duration);
 538   action = (surf_action_cpu_Cas01_t) cpu_execute(cpu, 1.0);
 539   GENERIC_ACTION(action).max_duration = duration;
 540   GENERIC_LMM_ACTION(action).suspended = 2;
 541   if (duration == NO_MAX_DURATION) {
 542     /* Move to the *end* of the corresponding action set. This convention
 543        is used to speed up update_resource_state  */
 544     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 545     ((surf_action_t) action)->state_set =
 546         cpu_running_action_set_that_does_not_need_being_checked;
 547     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 548   }
 549
 550   lmm_update_variable_weight(cpu_maxmin_system,
 551                              GENERIC_LMM_ACTION(action).variable, 0.0);
 552   if (cpu_update_mechanism == UM_LAZY) {     // remove action from the heap
 553     heap_remove((surf_action_cpu_Cas01_t) action);
 554     // this is necessary for a variable with weight 0 since such
 555     // variables are ignored in lmm and we need to set its max_duration
 556     // correctly at the next call to share_resources
 557     xbt_swag_insert_at_head(action,cpu_modified_set);
 558   }
 559
 560   XBT_OUT();
 561   return (surf_action_t) action;
 562 }
 563
 564 static void cpu_action_suspend(surf_action_t action)
 565 {
 566   XBT_IN("(%p)", action);
 567   if (((surf_action_lmm_t) action)->suspended != 2) {
 568     lmm_update_variable_weight(cpu_maxmin_system,
 569                                ((surf_action_lmm_t) action)->variable,
 570                                0.0);
 571     ((surf_action_lmm_t) action)->suspended = 1;
 572     if (cpu_update_mechanism == UM_LAZY)
 573       heap_remove((surf_action_cpu_Cas01_t) action);
 574   }
 575   XBT_OUT();
 576 }
 577
 578 static void cpu_action_resume(surf_action_t action)
 579 {
 580
 581   XBT_IN("(%p)", action);
 582   if (((surf_action_lmm_t) action)->suspended != 2) {
 583     lmm_update_variable_weight(cpu_maxmin_system,
 584                                ((surf_action_lmm_t) action)->variable,
 585                                action->priority);
 586     ((surf_action_lmm_t) action)->suspended = 0;
 587     if (cpu_update_mechanism == UM_LAZY)
 588       heap_remove((surf_action_cpu_Cas01_t) action);
 589   }
 590   XBT_OUT();
 591 }
 592
 593 static int cpu_action_is_suspended(surf_action_t action)
 594 {
 595   return (((surf_action_lmm_t) action)->suspended == 1);
 596 }
 597
 598 static void cpu_action_set_max_duration(surf_action_t action,
 599                                         double duration)
 600 {
 601   XBT_IN("(%p,%g)", action, duration);
 602
 603   action->max_duration = duration;
 604   if (cpu_update_mechanism == UM_LAZY)
 605     heap_remove((surf_action_cpu_Cas01_t) action);
 606   XBT_OUT();
 607 }
 608
 609 static void cpu_action_set_priority(surf_action_t action, double priority)
 610 {
 611   XBT_IN("(%p,%g)", action, priority);
 612   action->priority = priority;
 613   lmm_update_variable_weight(cpu_maxmin_system,
 614                              ((surf_action_lmm_t) action)->variable,
 615                              priority);
 616
 617   if (cpu_update_mechanism == UM_LAZY)
 618     heap_remove((surf_action_cpu_Cas01_t) action);
 619   XBT_OUT();
 620 }
 621
 622 #ifdef HAVE_TRACING
 623 static void cpu_action_set_category(surf_action_t action,
 624                                     const char *category)
 625 {
 626   XBT_IN("(%p,%s)", action, category);
 627   action->category = xbt_strdup(category);
 628   XBT_OUT();
 629 }
 630 #endif
 631
 632 static double cpu_action_get_remains(surf_action_t action)
 633 {
 634   XBT_IN("(%p)", action);
 635   /* update remains before return it */
 636   if (cpu_update_mechanism == UM_LAZY)
 637     update_action_remaining_lazy(surf_get_clock());
 638   XBT_OUT();
 639   return action->remains;
 640 }
 641
 642 static e_surf_resource_state_t cpu_get_state(void *cpu)
 643 {
 644   return ((cpu_Cas01_t) cpu)->state_current;
 645 }
 646
 647 static double cpu_get_speed(void *cpu, double load)
 648 {
 649   return load * (((cpu_Cas01_t) cpu)->power_peak);
 650 }
 651
 652 static double cpu_get_available_speed(void *cpu)
 653 {
 654   /* number between 0 and 1 */
 655   return ((cpu_Cas01_t) cpu)->power_scale;
 656 }
 657
 658 static void cpu_action_update_index_heap(void *action, int i)
 659 {
 660   ((surf_action_cpu_Cas01_t) action)->index_heap = i;
 661 }
 662
 663 static void cpu_finalize(void)
 664 {
 665   lmm_system_free(cpu_maxmin_system);
 666   cpu_maxmin_system = NULL;
 667
 668   surf_model_exit(surf_cpu_model);
 669   surf_cpu_model = NULL;
 670
 671   xbt_swag_free(cpu_running_action_set_that_does_not_need_being_checked);
 672   cpu_running_action_set_that_does_not_need_being_checked = NULL;
 673   if (cpu_action_heap)
 674     xbt_heap_free(cpu_action_heap);
 675 }
 676
 677 static void surf_cpu_model_init_internal()
 678 {
 679   s_surf_action_t action;
 680   s_surf_action_cpu_Cas01_t comp;
 681
 682   surf_cpu_model = surf_model_init();
 683
 684   cpu_running_action_set_that_does_not_need_being_checked =
 685       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 686
 687   surf_cpu_model->name = "cpu";
 688
 689   surf_cpu_model->action_unref = cpu_action_unref;
 690   surf_cpu_model->action_cancel = cpu_action_cancel;
 691   surf_cpu_model->action_state_set = cpu_action_state_set;
 692
 693   surf_cpu_model->model_private->resource_used = cpu_resource_used;
 694
 695   if (cpu_update_mechanism == UM_LAZY) {
 696     surf_cpu_model->model_private->share_resources =
 697         cpu_share_resources_lazy;
 698     surf_cpu_model->model_private->update_actions_state =
 699         cpu_update_actions_state_lazy;
 700   } else if (cpu_update_mechanism == UM_FULL) {
 701     surf_cpu_model->model_private->share_resources =
 702         cpu_share_resources_full;
 703     surf_cpu_model->model_private->update_actions_state =
 704         cpu_update_actions_state_full;
 705   } else
 706     xbt_die("Invalid update mechanism!");
 707
 708   surf_cpu_model->model_private->update_resource_state =
 709       cpu_update_resource_state;
 710   surf_cpu_model->model_private->finalize = cpu_finalize;
 711
 712   surf_cpu_model->suspend = cpu_action_suspend;
 713   surf_cpu_model->resume = cpu_action_resume;
 714   surf_cpu_model->is_suspended = cpu_action_is_suspended;
 715   surf_cpu_model->set_max_duration = cpu_action_set_max_duration;
 716   surf_cpu_model->set_priority = cpu_action_set_priority;
 717 #ifdef HAVE_TRACING
 718   surf_cpu_model->set_category = cpu_action_set_category;
 719 #endif
 720   surf_cpu_model->get_remains = cpu_action_get_remains;
 721
 722   surf_cpu_model->extension.cpu.execute = cpu_execute;
 723   surf_cpu_model->extension.cpu.sleep = cpu_action_sleep;
 724
 725   surf_cpu_model->extension.cpu.get_state = cpu_get_state;
 726   surf_cpu_model->extension.cpu.get_speed = cpu_get_speed;
 727   surf_cpu_model->extension.cpu.get_available_speed =
 728       cpu_get_available_speed;
 729   surf_cpu_model->extension.cpu.create_resource = cpu_create_resource;
 730   surf_cpu_model->extension.cpu.add_traces = cpu_add_traces_cpu;
 731
 732   if (!cpu_maxmin_system) {
 733     cpu_maxmin_system = lmm_system_new(cpu_selective_update);
 734   }
 735   if (cpu_update_mechanism == UM_LAZY) {
 736     cpu_action_heap = xbt_heap_new(8, NULL);
 737     xbt_heap_set_update_callback(cpu_action_heap,
 738                                  cpu_action_update_index_heap);
 739     cpu_modified_set =
 740         xbt_swag_new(xbt_swag_offset(comp, action_list_hookup));
 741     cpu_maxmin_system->keep_track = cpu_modified_set;
 742   }
 743 }
 744
 745 /*********************************************************************/
 746 /* Basic sharing model for CPU: that is where all this started... ;) */
 747 /*********************************************************************/
 748 /* @InProceedings{casanova01simgrid, */
 749 /*   author =       "H. Casanova", */
 750 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 751 /*                  and the Grid (CCGrid'01)", */
 752 /*   publisher =    "IEEE Computer Society", */
 753 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 754 /*                  Scheduling", */
 755 /*   year =         "2001", */
 756 /*   month =        may, */
 757 /*   note =         "Available at */
 758 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 759 /* } */
 760
 761 void surf_cpu_model_init_Cas01()
 762 {
 763   char *optim = xbt_cfg_get_string(_surf_cfg_set, "cpu/optim");
 764   int select =
 765       xbt_cfg_get_int(_surf_cfg_set, "cpu/maxmin_selective_update");
 766
 767   if (!strcmp(optim, "Full")) {
 768     cpu_update_mechanism = UM_FULL;
 769     cpu_selective_update = select;
 770   } else if (!strcmp(optim, "Lazy")) {
 771     cpu_update_mechanism = UM_LAZY;
 772     cpu_selective_update = 1;
 773     xbt_assert((select == 1)
 774                ||
 775                (xbt_cfg_is_default_value
 776                 (_surf_cfg_set, "cpu/maxmin_selective_update")),
 777                "Disabling selective update while using the lazy update mechanism is dumb!");
 778   } else if (!strcmp(optim, "TI")) {
 779     surf_cpu_model_init_ti();
 780     return;
 781   } else {
 782     xbt_die("Unsupported optimization (%s) for this model", optim);
 783   }
 784
 785   if (surf_cpu_model)
 786     return;
 787   surf_cpu_model_init_internal();
 788   cpu_define_callbacks();
 789   xbt_dynar_push(model_list, &surf_cpu_model);
 790 }