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 int cpu_selective_update = 0;
  14
  15 static xbt_swag_t cpu_modified_cpu = NULL;
  16 static xbt_heap_t cpu_action_heap = NULL;
  17
  18 #undef GENERIC_LMM_ACTION
  19 #undef GENERIC_ACTION
  20 #undef ACTION_GET_CPU
  21 #define GENERIC_LMM_ACTION(action) action->generic_lmm_action
  22 #define GENERIC_ACTION(action) GENERIC_LMM_ACTION(action).generic_action
  23 #define ACTION_GET_CPU(action) ((surf_action_cpu_Cas01_t) action)->cpu
  24
  25 typedef struct surf_action_cpu_cas01 {
  26   s_surf_action_lmm_t generic_lmm_action;
  27   s_xbt_swag_hookup_t cpu_list_hookup;
  28   int index_heap;
  29   void *cpu;
  30 } s_surf_action_cpu_Cas01_t, *surf_action_cpu_Cas01_t;
  31
  32 typedef struct cpu_Cas01 {
  33   s_surf_resource_t generic_resource;
  34   s_xbt_swag_hookup_t modified_cpu_hookup;
  35   double power_peak;
  36   double power_scale;
  37   tmgr_trace_event_t power_event;
  38   int core;
  39   e_surf_resource_state_t state_current;
  40   tmgr_trace_event_t state_event;
  41   lmm_constraint_t constraint;
  42   xbt_swag_t action_set;
  43   double last_update;
  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 static void* cpu_create_resource(const char *name, double power_peak,
  55                                  double power_scale,
  56                                  tmgr_trace_t power_trace,
  57                                  int core,
  58                                  e_surf_resource_state_t state_initial,
  59                                  tmgr_trace_t state_trace,
  60                                  xbt_dict_t cpu_properties)
  61 {
  62   cpu_Cas01_t cpu = NULL;
  63   s_surf_action_cpu_Cas01_t action;
  64
  65   xbt_assert(!surf_cpu_resource_by_name(name),
  66               "Host '%s' declared several times in the platform file",
  67               name);
  68   cpu = (cpu_Cas01_t) surf_resource_new(sizeof(s_cpu_Cas01_t),
  69           surf_cpu_model, name,cpu_properties);
  70   cpu->power_peak = power_peak;
  71   xbt_assert(cpu->power_peak > 0, "Power has to be >0");
  72   cpu->power_scale = power_scale;
  73   cpu->core = core;
  74   xbt_assert(core>0,"Invalid number of cores %d",core);
  75
  76   if (power_trace)
  77     cpu->power_event =
  78         tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
  79
  80   cpu->state_current = state_initial;
  81   if (state_trace)
  82     cpu->state_event =
  83         tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
  84
  85   cpu->constraint =
  86       lmm_constraint_new(cpu_maxmin_system, cpu,
  87                          cpu->core * cpu->power_scale * cpu->power_peak);
  88
  89   xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, cpu);
  90   if(cpu_update_mechanism == UM_LAZY)
  91     cpu->action_set = xbt_swag_new(xbt_swag_offset(action, cpu_list_hookup));
  92
  93   return cpu;
  94 }
  95
  96
  97 static void parse_cpu_init(sg_platf_host_cbarg_t host)
  98 {
  99         cpu_create_resource(host->id,
 100                           host->power_peak,
 101                           host->power_scale,
 102                           host->power_trace,
 103                           host->core_amount,
 104                           host->initial_state,
 105                           host->state_trace,
 106                           host->properties);
 107 }
 108
 109 static void cpu_add_traces_cpu(void)
 110 {
 111   xbt_dict_cursor_t cursor = NULL;
 112   char *trace_name, *elm;
 113   static int called = 0;
 114   if (called)
 115     return;
 116   called = 1;
 117
 118   /* connect all traces relative to hosts */
 119   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 120     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 121     cpu_Cas01_t host = surf_cpu_resource_by_name(elm);
 122
 123     xbt_assert(host, "Host %s undefined", elm);
 124     xbt_assert(trace, "Trace %s undefined", trace_name);
 125
 126     host->state_event =
 127         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 128   }
 129
 130   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 131     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 132     cpu_Cas01_t host = surf_cpu_resource_by_name(elm);
 133
 134     xbt_assert(host, "Host %s undefined", elm);
 135     xbt_assert(trace, "Trace %s undefined", trace_name);
 136
 137     host->power_event =
 138         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 139   }
 140 }
 141
 142 static void cpu_define_callbacks()
 143 {
 144   sg_platf_host_add_cb(parse_cpu_init);
 145   sg_platf_postparse_add_cb(cpu_add_traces_cpu);
 146 }
 147
 148 static int cpu_resource_used(void *resource)
 149 {
 150   return lmm_constraint_used(cpu_maxmin_system,
 151                              ((cpu_Cas01_t) resource)->constraint);
 152 }
 153
 154 static int cpu_action_unref(surf_action_t action)
 155 {
 156   action->refcount--;
 157   if (!action->refcount) {
 158     xbt_swag_remove(action, action->state_set);
 159     if (((surf_action_lmm_t) action)->variable)
 160       lmm_variable_free(cpu_maxmin_system,
 161                         ((surf_action_lmm_t) action)->variable);
 162     if(cpu_update_mechanism == UM_LAZY){
 163     /* remove from heap */
 164     xbt_heap_remove(cpu_action_heap,
 165                     ((surf_action_cpu_Cas01_t) action)->index_heap);
 166     xbt_swag_remove(action,
 167                     ((cpu_Cas01_t) ACTION_GET_CPU(action))->action_set);
 168     xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
 169     }
 170 #ifdef HAVE_TRACING
 171     xbt_free(action->category);
 172 #endif
 173     surf_action_free(&action);
 174     return 1;
 175   }
 176   return 0;
 177 }
 178
 179 static void cpu_action_cancel(surf_action_t action)
 180 {
 181   surf_action_state_set(action, SURF_ACTION_FAILED);
 182   if(cpu_update_mechanism == UM_LAZY){
 183   xbt_heap_remove(cpu_action_heap,
 184                   ((surf_action_cpu_Cas01_t) action)->index_heap);
 185   xbt_swag_remove(action,
 186                   ((cpu_Cas01_t) ACTION_GET_CPU(action))->action_set);
 187   }
 188   return;
 189 }
 190
 191 static void cpu_cpu_action_state_set(surf_action_t action,
 192                                         e_surf_action_state_t state)
 193 {
 194 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 195 /*     if(((surf_action_lmm_t)action)->variable) { */
 196 /*       lmm_variable_disable(cpu_maxmin_system, ((surf_action_lmm_t)action)->variable); */
 197 /*       ((surf_action_lmm_t)action)->variable = NULL; */
 198 /*     } */
 199
 200   surf_action_state_set(action, state);
 201   return;
 202 }
 203
 204 static void cpu_update_remains(cpu_Cas01_t cpu, double now)
 205 {
 206   surf_action_cpu_Cas01_t action;
 207
 208   if (cpu->last_update >= now)
 209     return;
 210   xbt_swag_foreach(action, cpu->action_set) {
 211     if (GENERIC_ACTION(action).state_set !=
 212         surf_cpu_model->states.running_action_set)
 213       continue;
 214
 215     /* bogus priority, skip it */
 216     if (GENERIC_ACTION(action).priority <= 0)
 217       continue;
 218
 219     if (GENERIC_ACTION(action).remains > 0) {
 220       double_update(&(GENERIC_ACTION(action).remains),
 221                     lmm_variable_getvalue(GENERIC_LMM_ACTION
 222                                           (action).variable) * (now -
 223                                                                 cpu->last_update));
 224 #ifdef HAVE_TRACING
 225       if (TRACE_is_enabled()) {
 226         TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 227                                         action->
 228                                         generic_lmm_action.generic_action.
 229                                         data, (surf_action_t) action,
 230                                         lmm_variable_getvalue
 231                                         (GENERIC_LMM_ACTION
 232                                          (action).variable),
 233                                         cpu->last_update,
 234                                         now - cpu->last_update);
 235       }
 236 #endif
 237       XBT_DEBUG("Update action(%p) remains %lf", action,
 238              GENERIC_ACTION(action).remains);
 239     }
 240   }
 241   cpu->last_update = now;
 242 }
 243
 244 static double cpu_share_resources_lazy(double now)
 245 {
 246   surf_action_cpu_Cas01_t action;
 247   double min;
 248   double value;
 249   cpu_Cas01_t cpu, cpu_next;
 250
 251   xbt_swag_foreach(cpu, cpu_modified_cpu)
 252       cpu_update_remains(cpu, now);
 253
 254   lmm_solve(cpu_maxmin_system);
 255
 256   xbt_swag_foreach_safe(cpu, cpu_next, cpu_modified_cpu) {
 257     xbt_swag_foreach(action, cpu->action_set) {
 258       if (GENERIC_ACTION(action).state_set !=
 259           surf_cpu_model->states.running_action_set)
 260         continue;
 261
 262       /* bogus priority, skip it */
 263       if (GENERIC_ACTION(action).priority <= 0)
 264         continue;
 265
 266       min = -1;
 267       value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 268       if (value > 0) {
 269         if (GENERIC_ACTION(action).remains > 0) {
 270           value = GENERIC_ACTION(action).remains / value;
 271           min = now + value;
 272         } else {
 273           value = 0.0;
 274           min = now;
 275         }
 276       }
 277
 278       if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 279           && (min == -1
 280               || GENERIC_ACTION(action).start +
 281               GENERIC_ACTION(action).max_duration < min))
 282         min =
 283             GENERIC_ACTION(action).start +
 284             GENERIC_ACTION(action).max_duration;
 285
 286       XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 287              GENERIC_ACTION(action).start, now + value,
 288              GENERIC_ACTION(action).max_duration);
 289
 290       if (action->index_heap >= 0) {
 291         surf_action_cpu_Cas01_t heap_act =
 292             xbt_heap_remove(cpu_action_heap, action->index_heap);
 293         if (heap_act != action)
 294           DIE_IMPOSSIBLE;
 295       }
 296       if (min != -1) {
 297         xbt_heap_push(cpu_action_heap, action, min);
 298         XBT_DEBUG("Insert at heap action(%p) min %lf", action, min);
 299       }
 300     }
 301     xbt_swag_remove(cpu, cpu_modified_cpu);
 302   }
 303   return xbt_heap_size(cpu_action_heap) >
 304       0 ? xbt_heap_maxkey(cpu_action_heap) - now : -1;
 305 }
 306
 307 static double cpu_share_resources_full(double now) {
 308   surf_action_cpu_Cas01_t action;
 309   return generic_maxmin_share_resources(surf_cpu_model->states.running_action_set,
 310       xbt_swag_offset(*action, generic_lmm_action.variable),
 311       cpu_maxmin_system, lmm_solve);
 312 }
 313
 314 static void cpu_update_actions_state_lazy(double now, double delta)
 315 {
 316   surf_action_cpu_Cas01_t action;
 317   while ((xbt_heap_size(cpu_action_heap) > 0)
 318          && (double_equals(xbt_heap_maxkey(cpu_action_heap), now))) {
 319     action = xbt_heap_pop(cpu_action_heap);
 320     XBT_DEBUG("Action %p: finish", action);
 321     GENERIC_ACTION(action).finish = surf_get_clock();
 322     /* set the remains to 0 due to precision problems when updating the remaining amount */
 323 #ifdef HAVE_TRACING
 324     if (TRACE_is_enabled()) {
 325       cpu_Cas01_t cpu = ((cpu_Cas01_t)(action->cpu));
 326       TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 327           GENERIC_LMM_ACTION(action).generic_action.data,
 328           (surf_action_t) action,
 329           lmm_variable_getvalue (GENERIC_LMM_ACTION(action).variable),
 330           cpu->last_update,
 331           now - cpu->last_update);
 332     }
 333 #endif
 334     GENERIC_ACTION(action).remains = 0;
 335     cpu_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 336     cpu_update_remains(action->cpu, surf_get_clock());
 337   }
 338 #ifdef HAVE_TRACING
 339   if (TRACE_is_enabled()) {
 340     //defining the last timestamp that we can safely dump to trace file
 341     //without losing the event ascending order (considering all CPU's)
 342     void **data;
 343     cpu_Cas01_t cpu;
 344     xbt_lib_cursor_t cursor;
 345     char *key;
 346     double smaller = -1;
 347     xbt_lib_foreach(host_lib, cursor, key, data){
 348       if(data[SURF_CPU_LEVEL]){
 349         cpu = data[SURF_CPU_LEVEL];
 350         if (smaller < 0){
 351           smaller = cpu->last_update;
 352           continue;
 353         }
 354         if (cpu->last_update < smaller){
 355           smaller = cpu->last_update;
 356         }
 357       }
 358     }
 359     if (smaller > 0) {
 360       TRACE_last_timestamp_to_dump = smaller;
 361     }
 362   }
 363 #endif
 364   return;
 365 }
 366
 367 static void cpu_update_actions_state_full(double now, double delta)
 368 {
 369   surf_action_cpu_Cas01_t action = NULL;
 370   surf_action_cpu_Cas01_t next_action = NULL;
 371   xbt_swag_t running_actions = surf_cpu_model->states.running_action_set;
 372   xbt_swag_foreach_safe(action, next_action, running_actions) {
 373 #ifdef HAVE_TRACING
 374     if (TRACE_is_enabled()) {
 375       cpu_Cas01_t x =
 376         lmm_constraint_id(lmm_get_cnst_from_var
 377                           (cpu_maxmin_system, GENERIC_LMM_ACTION(action).variable, 0));
 378
 379       TRACE_surf_host_set_utilization(x->generic_resource.name,
 380                                       GENERIC_ACTION(action).data,
 381                                       (surf_action_t) action,
 382                                       lmm_variable_getvalue
 383                                       (GENERIC_LMM_ACTION(action).variable), 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).variable) * delta);
 390     if (GENERIC_LMM_ACTION(action).generic_action.max_duration != NO_MAX_DURATION)
 391       double_update(&(GENERIC_ACTION(action).max_duration), delta);
 392     if ((GENERIC_ACTION(action).remains <= 0) &&
 393         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 394       GENERIC_ACTION(action).finish = surf_get_clock();
 395       cpu_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 396     } else if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION) &&
 397                (GENERIC_ACTION(action).max_duration <= 0)) {
 398       GENERIC_ACTION(action).finish = surf_get_clock();
 399       cpu_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 400     }
 401   }
 402
 403   return;
 404 }
 405
 406 static void cpu_update_resource_state(void *id,
 407                                          tmgr_trace_event_t event_type,
 408                                          double value, double date)
 409 {
 410   cpu_Cas01_t cpu = id;
 411   lmm_variable_t var = NULL;
 412   lmm_element_t elem = NULL;
 413
 414   if (event_type == cpu->power_event) {
 415     cpu->power_scale = value;
 416     lmm_update_constraint_bound(cpu_maxmin_system, cpu->constraint,
 417                                 cpu->core * cpu->power_scale * cpu->power_peak);
 418 #ifdef HAVE_TRACING
 419     TRACE_surf_host_set_power(date, cpu->generic_resource.name,
 420                               cpu->core * cpu->power_scale * cpu->power_peak);
 421 #endif
 422     while ((var = lmm_get_var_from_cnst
 423             (cpu_maxmin_system, cpu->constraint, &elem))) {
 424         surf_action_cpu_Cas01_t action = lmm_variable_id(var);
 425         lmm_update_variable_bound(cpu_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 426                                   cpu->power_scale * cpu->power_peak);
 427     }
 428     if(cpu_update_mechanism == UM_LAZY)
 429       xbt_swag_insert(cpu, cpu_modified_cpu);
 430     if (tmgr_trace_event_free(event_type))
 431       cpu->power_event = NULL;
 432   } else if (event_type == cpu->state_event) {
 433     if (value > 0)
 434       cpu->state_current = SURF_RESOURCE_ON;
 435     else {
 436       lmm_constraint_t cnst = cpu->constraint;
 437       lmm_variable_t var = NULL;
 438       lmm_element_t elem = NULL;
 439
 440       cpu->state_current = SURF_RESOURCE_OFF;
 441
 442       while ((var =
 443               lmm_get_var_from_cnst(cpu_maxmin_system, cnst, &elem))) {
 444         surf_action_t action = lmm_variable_id(var);
 445
 446         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 447             surf_action_state_get(action) == SURF_ACTION_READY ||
 448             surf_action_state_get(action) ==
 449             SURF_ACTION_NOT_IN_THE_SYSTEM) {
 450           action->finish = date;
 451           cpu_cpu_action_state_set(action, SURF_ACTION_FAILED);
 452         }
 453       }
 454     }
 455     if (tmgr_trace_event_free(event_type))
 456       cpu->state_event = NULL;
 457   } else {
 458     XBT_CRITICAL("Unknown event ! \n");
 459     xbt_abort();
 460   }
 461
 462   return;
 463 }
 464
 465 static surf_action_t cpu_execute(void *cpu, double size)
 466 {
 467   surf_action_cpu_Cas01_t action = NULL;
 468   cpu_Cas01_t CPU = cpu;
 469
 470   XBT_IN("(%s,%g)", surf_resource_name(CPU), size);
 471   action =
 472       surf_action_new(sizeof(s_surf_action_cpu_Cas01_t), size,
 473                       surf_cpu_model,
 474                       CPU->state_current != SURF_RESOURCE_ON);
 475
 476   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 477                                                    calloc but it seems to help valgrind... */
 478
 479   GENERIC_LMM_ACTION(action).variable =
 480       lmm_variable_new(cpu_maxmin_system, action,
 481                        GENERIC_ACTION(action).priority, CPU->power_scale * CPU->power_peak, 1);
 482   if(cpu_update_mechanism == UM_LAZY){
 483     action->index_heap = -1;
 484     action->cpu = CPU;
 485     xbt_swag_insert(CPU, cpu_modified_cpu);
 486     xbt_swag_insert(action, CPU->action_set);
 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)
 517     xbt_swag_insert(cpu, cpu_modified_cpu);
 518   XBT_OUT();
 519   return (surf_action_t) action;
 520 }
 521
 522 static void cpu_action_suspend(surf_action_t action)
 523 {
 524   XBT_IN("(%p)", action);
 525   if (((surf_action_lmm_t) action)->suspended != 2) {
 526     lmm_update_variable_weight(cpu_maxmin_system,
 527                                ((surf_action_lmm_t) action)->variable,
 528                                0.0);
 529     ((surf_action_lmm_t) action)->suspended = 1;
 530     if(cpu_update_mechanism == UM_LAZY){
 531       xbt_heap_remove(cpu_action_heap,
 532                       ((surf_action_cpu_Cas01_t) action)->index_heap);
 533       xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
 534     }
 535   }
 536   XBT_OUT();
 537 }
 538
 539 static void cpu_action_resume(surf_action_t action)
 540 {
 541
 542   XBT_IN("(%p)", action);
 543   if (((surf_action_lmm_t) action)->suspended != 2) {
 544     lmm_update_variable_weight(cpu_maxmin_system,
 545                                ((surf_action_lmm_t) action)->variable,
 546                                action->priority);
 547     ((surf_action_lmm_t) action)->suspended = 0;
 548     if(cpu_update_mechanism == UM_LAZY)
 549       xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
 550   }
 551   XBT_OUT();
 552 }
 553
 554 static int cpu_action_is_suspended(surf_action_t action)
 555 {
 556   return (((surf_action_lmm_t) action)->suspended == 1);
 557 }
 558
 559 static void cpu_action_set_max_duration(surf_action_t action,
 560                                            double duration)
 561 {
 562   XBT_IN("(%p,%g)", action, duration);
 563
 564   action->max_duration = duration;
 565   /* insert cpu in modified_cpu set to notice the max duration change */
 566   if(cpu_update_mechanism == UM_LAZY)
 567     xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
 568   XBT_OUT();
 569 }
 570
 571 static void cpu_action_set_priority(surf_action_t action,
 572                                        double priority)
 573 {
 574   XBT_IN("(%p,%g)", action, priority);
 575   action->priority = priority;
 576   lmm_update_variable_weight(cpu_maxmin_system,
 577                              ((surf_action_lmm_t) action)->variable,
 578                              priority);
 579
 580   if(cpu_update_mechanism == UM_LAZY)
 581     xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
 582   XBT_OUT();
 583 }
 584
 585 #ifdef HAVE_TRACING
 586 static void cpu_action_set_category(surf_action_t action,
 587                                        const char *category)
 588 {
 589   XBT_IN("(%p,%s)", action, category);
 590   action->category = xbt_strdup (category);
 591   XBT_OUT();
 592 }
 593 #endif
 594
 595 static double cpu_action_get_remains(surf_action_t action)
 596 {
 597   XBT_IN("(%p)", action);
 598   /* update remains before return it */
 599   if(cpu_update_mechanism == UM_LAZY)
 600     cpu_update_remains(ACTION_GET_CPU(action), surf_get_clock());
 601   XBT_OUT();
 602   return action->remains;
 603 }
 604
 605 static e_surf_resource_state_t cpu_get_state(void *cpu)
 606 {
 607   return ((cpu_Cas01_t) cpu)->state_current;
 608 }
 609
 610 static double cpu_get_speed(void *cpu, double load)
 611 {
 612   return load * (((cpu_Cas01_t) cpu)->power_peak);
 613 }
 614
 615 static double cpu_get_available_speed(void *cpu)
 616 {
 617   /* number between 0 and 1 */
 618   return ((cpu_Cas01_t) cpu)->power_scale;
 619 }
 620
 621 static void cpu_action_update_index_heap(void *action, int i)
 622 {
 623   ((surf_action_cpu_Cas01_t) action)->index_heap = i;
 624 }
 625
 626 static void cpu_finalize(void)
 627 {
 628   void **cpu;
 629   xbt_lib_cursor_t cursor;
 630   char *key;
 631
 632   xbt_lib_foreach(host_lib, cursor, key, cpu){
 633     if(cpu[SURF_CPU_LEVEL])
 634     {
 635         cpu_Cas01_t CPU = cpu[SURF_CPU_LEVEL];
 636         xbt_swag_free(CPU->action_set);
 637     }
 638   }
 639
 640   lmm_system_free(cpu_maxmin_system);
 641   cpu_maxmin_system = NULL;
 642
 643   surf_model_exit(surf_cpu_model);
 644   surf_cpu_model = NULL;
 645
 646   xbt_swag_free
 647       (cpu_running_action_set_that_does_not_need_being_checked);
 648   cpu_running_action_set_that_does_not_need_being_checked = NULL;
 649   if(cpu_action_heap)  xbt_heap_free(cpu_action_heap);
 650   if(cpu_modified_cpu) xbt_swag_free(cpu_modified_cpu);
 651 }
 652
 653 static void surf_cpu_model_init_internal()
 654 {
 655   s_surf_action_t action;
 656   s_cpu_Cas01_t cpu;
 657
 658   surf_cpu_model = surf_model_init();
 659
 660   cpu_running_action_set_that_does_not_need_being_checked =
 661       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 662
 663   surf_cpu_model->name = "cpu";
 664
 665   surf_cpu_model->action_unref = cpu_action_unref;
 666   surf_cpu_model->action_cancel = cpu_action_cancel;
 667   surf_cpu_model->action_state_set = cpu_cpu_action_state_set;
 668
 669   surf_cpu_model->model_private->resource_used = cpu_resource_used;
 670
 671   if(cpu_update_mechanism == UM_LAZY) {
 672     surf_cpu_model->model_private->share_resources = cpu_share_resources_lazy;
 673     surf_cpu_model->model_private->update_actions_state = cpu_update_actions_state_lazy;
 674   } else if (cpu_update_mechanism == UM_FULL) {
 675     surf_cpu_model->model_private->share_resources = cpu_share_resources_full;
 676     surf_cpu_model->model_private->update_actions_state = cpu_update_actions_state_full;
 677   } else
 678     xbt_die("Invalid update mechanism!");
 679
 680   surf_cpu_model->model_private->update_resource_state =
 681       cpu_update_resource_state;
 682   surf_cpu_model->model_private->finalize = cpu_finalize;
 683
 684   surf_cpu_model->suspend = cpu_action_suspend;
 685   surf_cpu_model->resume = cpu_action_resume;
 686   surf_cpu_model->is_suspended = cpu_action_is_suspended;
 687   surf_cpu_model->set_max_duration = cpu_action_set_max_duration;
 688   surf_cpu_model->set_priority = cpu_action_set_priority;
 689 #ifdef HAVE_TRACING
 690   surf_cpu_model->set_category = cpu_action_set_category;
 691 #endif
 692   surf_cpu_model->get_remains = cpu_action_get_remains;
 693
 694   surf_cpu_model->extension.cpu.execute = cpu_execute;
 695   surf_cpu_model->extension.cpu.sleep = cpu_action_sleep;
 696
 697   surf_cpu_model->extension.cpu.get_state = cpu_get_state;
 698   surf_cpu_model->extension.cpu.get_speed = cpu_get_speed;
 699   surf_cpu_model->extension.cpu.get_available_speed =
 700       cpu_get_available_speed;
 701   surf_cpu_model->extension.cpu.create_resource = cpu_create_resource;
 702   surf_cpu_model->extension.cpu.add_traces = cpu_add_traces_cpu;
 703
 704   if (!cpu_maxmin_system) {
 705     cpu_maxmin_system = lmm_system_new(cpu_selective_update);
 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   int select = xbt_cfg_get_int(_surf_cfg_set, "cpu/maxmin_selective_update");
 736
 737   if(!strcmp(optim,"Full")) {
 738     cpu_update_mechanism = UM_FULL;
 739     cpu_selective_update = select;
 740   } else if (!strcmp(optim,"Lazy")) {
 741     cpu_update_mechanism = UM_LAZY;
 742     cpu_selective_update = 1;
 743     xbt_assert((select==1) || (xbt_cfg_is_default_value(_surf_cfg_set,"cpu/maxmin_selective_update")),
 744         "Disabling selective update while using the lazy update mechanism is dumb!");
 745   } else if (!strcmp(optim,"TI")) {
 746     surf_cpu_model_init_ti();
 747     return;
 748   } else {
 749     xbt_die("Unsupported optimization (%s) for this model",optim);
 750   }
 751
 752   if (surf_cpu_model)
 753     return;
 754   surf_cpu_model_init_internal();
 755   cpu_define_callbacks();
 756   xbt_dynar_push(model_list, &surf_cpu_model);
 757 }