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