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         cpu_Cas01_t cpu =
 247             lmm_constraint_id(lmm_get_cnst_from_var
 248                               (cpu_maxmin_system,
 249                                GENERIC_LMM_ACTION(action).variable, 0));
 250         TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 251                                         action->generic_lmm_action.
 252                                         generic_action.data,
 253                                         (surf_action_t) action,
 254                                         lmm_variable_getvalue
 255                                         (GENERIC_LMM_ACTION(action).
 256                                          variable), action->last_update,
 257                                         now - action->last_update);
 258       }
 259 #endif
 260       XBT_DEBUG("Update action(%p) remains %lf", action,
 261                 GENERIC_ACTION(action).remains);
 262     }
 263     action->last_update = now;
 264   }
 265
 266 }
 267
 268 static double cpu_share_resources_lazy(double now)
 269 {
 270   surf_action_cpu_Cas01_t action = NULL;
 271   double min = -1;
 272   double value;
 273
 274   XBT_DEBUG
 275       ("Before share resources, the size of modified actions set is %d",
 276        xbt_swag_size(cpu_modified_set));
 277   update_action_remaining_lazy(now);
 278
 279   lmm_solve(cpu_maxmin_system);
 280
 281   XBT_DEBUG
 282       ("After share resources, The size of modified actions set is %d",
 283        xbt_swag_size(cpu_modified_set));
 284
 285   xbt_swag_foreach(action, cpu_modified_set) {
 286     int max_dur_flag = 0;
 287
 288     if (GENERIC_ACTION(action).state_set !=
 289         surf_cpu_model->states.running_action_set)
 290       continue;
 291
 292     /* bogus priority, skip it */
 293     if (GENERIC_ACTION(action).priority <= 0)
 294       continue;
 295
 296     min = -1;
 297     value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 298     if (value > 0) {
 299       if (GENERIC_ACTION(action).remains > 0) {
 300         value = GENERIC_ACTION(action).remains / value;
 301         min = now + value;
 302       } else {
 303         value = 0.0;
 304         min = now;
 305       }
 306     }
 307
 308     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 309         && (min == -1
 310             || GENERIC_ACTION(action).start +
 311             GENERIC_ACTION(action).max_duration < min)) {
 312       min = GENERIC_ACTION(action).start +
 313           GENERIC_ACTION(action).max_duration;
 314       max_dur_flag = 1;
 315     }
 316
 317     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 318         GENERIC_ACTION(action).start, now + value,
 319         GENERIC_ACTION(action).max_duration);
 320
 321     if (min != -1) {
 322       heap_remove(action);
 323       heap_insert(action, min, max_dur_flag ? MAX_DURATION : NORMAL);
 324       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 325                 now);
 326     } else DIE_IMPOSSIBLE;
 327   }
 328
 329   //hereafter must have already the min value for this resource model
 330   if (xbt_heap_size(cpu_action_heap) > 0)
 331     min = xbt_heap_maxkey(cpu_action_heap) - now;
 332   else
 333     min = -1;
 334
 335   XBT_DEBUG("The minimum with the HEAP %lf", min);
 336
 337   return min;
 338 }
 339
 340 static double cpu_share_resources_full(double now)
 341 {
 342   s_surf_action_cpu_Cas01_t action;
 343   return generic_maxmin_share_resources(surf_cpu_model->states.
 344                                         running_action_set,
 345                                         xbt_swag_offset(action,
 346                                                         generic_lmm_action.
 347                                                         variable),
 348                                         cpu_maxmin_system, lmm_solve);
 349 }
 350
 351 static void cpu_update_actions_state_lazy(double now, double delta)
 352 {
 353   surf_action_cpu_Cas01_t action;
 354   while ((xbt_heap_size(cpu_action_heap) > 0)
 355          && (double_equals(xbt_heap_maxkey(cpu_action_heap), now))) {
 356     action = xbt_heap_pop(cpu_action_heap);
 357     XBT_DEBUG("Action %p: finish", action);
 358     GENERIC_ACTION(action).finish = surf_get_clock();
 359     /* set the remains to 0 due to precision problems when updating the remaining amount */
 360 #ifdef HAVE_TRACING
 361     if (TRACE_is_enabled()) {
 362       cpu_Cas01_t cpu =
 363           lmm_constraint_id(lmm_get_cnst_from_var
 364                             (cpu_maxmin_system,
 365                              GENERIC_LMM_ACTION(action).variable, 0));
 366       TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 367                                       GENERIC_LMM_ACTION(action).
 368                                       generic_action.data,
 369                                       (surf_action_t) action,
 370                                       lmm_variable_getvalue
 371                                       (GENERIC_LMM_ACTION(action).
 372                                        variable), action->last_update,
 373                                       now - action->last_update);
 374     }
 375 #endif
 376     GENERIC_ACTION(action).remains = 0;
 377     cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 378     heap_remove(action);
 379   }
 380 #ifdef HAVE_TRACING
 381   if (TRACE_is_enabled()) {
 382     //defining the last timestamp that we can safely dump to trace file
 383     //without losing the event ascending order (considering all CPU's)
 384     double smaller = -1;
 385     xbt_swag_t running_actions = surf_cpu_model->states.running_action_set;
 386     xbt_swag_foreach(action, running_actions) {
 387         if (smaller < 0) {
 388           smaller = action->last_update;
 389           continue;
 390         }
 391         if (action->last_update < smaller) {
 392           smaller = action->last_update;
 393         }
 394     }
 395     if (smaller > 0) {
 396       TRACE_last_timestamp_to_dump = smaller;
 397     }
 398   }
 399 #endif
 400   return;
 401 }
 402
 403 static void cpu_update_actions_state_full(double now, double delta)
 404 {
 405   surf_action_cpu_Cas01_t action = NULL;
 406   surf_action_cpu_Cas01_t next_action = NULL;
 407   xbt_swag_t running_actions = surf_cpu_model->states.running_action_set;
 408   xbt_swag_foreach_safe(action, next_action, running_actions) {
 409 #ifdef HAVE_TRACING
 410     if (TRACE_is_enabled()) {
 411       cpu_Cas01_t x =
 412           lmm_constraint_id(lmm_get_cnst_from_var
 413                             (cpu_maxmin_system,
 414                              GENERIC_LMM_ACTION(action).variable, 0));
 415
 416       TRACE_surf_host_set_utilization(x->generic_resource.name,
 417                                       GENERIC_ACTION(action).data,
 418                                       (surf_action_t) action,
 419                                       lmm_variable_getvalue
 420                                       (GENERIC_LMM_ACTION(action).
 421                                        variable), now - delta, delta);
 422       TRACE_last_timestamp_to_dump = now - delta;
 423     }
 424 #endif
 425     double_update(&(GENERIC_ACTION(action).remains),
 426                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).
 427                                         variable) * delta);
 428     if (GENERIC_LMM_ACTION(action).generic_action.max_duration !=
 429         NO_MAX_DURATION)
 430       double_update(&(GENERIC_ACTION(action).max_duration), delta);
 431     if ((GENERIC_ACTION(action).remains <= 0) &&
 432         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) >
 433          0)) {
 434       GENERIC_ACTION(action).finish = surf_get_clock();
 435       cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 436     } else if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION) &&
 437                (GENERIC_ACTION(action).max_duration <= 0)) {
 438       GENERIC_ACTION(action).finish = surf_get_clock();
 439       cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 440     }
 441   }
 442
 443   return;
 444 }
 445
 446 static void cpu_update_resource_state(void *id,
 447                                       tmgr_trace_event_t event_type,
 448                                       double value, double date)
 449 {
 450   cpu_Cas01_t cpu = id;
 451   lmm_variable_t var = NULL;
 452   lmm_element_t elem = NULL;
 453
 454   if (event_type == cpu->power_event) {
 455     cpu->power_scale = value;
 456     lmm_update_constraint_bound(cpu_maxmin_system, cpu->constraint,
 457                                 cpu->core * cpu->power_scale *
 458                                 cpu->power_peak);
 459 #ifdef HAVE_TRACING
 460     TRACE_surf_host_set_power(date, cpu->generic_resource.name,
 461                               cpu->core * cpu->power_scale *
 462                               cpu->power_peak);
 463 #endif
 464     while ((var = lmm_get_var_from_cnst
 465             (cpu_maxmin_system, cpu->constraint, &elem))) {
 466       surf_action_cpu_Cas01_t action = lmm_variable_id(var);
 467       lmm_update_variable_bound(cpu_maxmin_system,
 468                                 GENERIC_LMM_ACTION(action).variable,
 469                                 cpu->power_scale * cpu->power_peak);
 470     }
 471     if (tmgr_trace_event_free(event_type))
 472       cpu->power_event = NULL;
 473   } else if (event_type == cpu->state_event) {
 474     if (value > 0)
 475       cpu->state_current = SURF_RESOURCE_ON;
 476     else {
 477       lmm_constraint_t cnst = cpu->constraint;
 478
 479       cpu->state_current = SURF_RESOURCE_OFF;
 480
 481       while ((var = lmm_get_var_from_cnst(cpu_maxmin_system, cnst, &elem))) {
 482         surf_action_t action = lmm_variable_id(var);
 483
 484         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 485             surf_action_state_get(action) == SURF_ACTION_READY ||
 486             surf_action_state_get(action) ==
 487             SURF_ACTION_NOT_IN_THE_SYSTEM) {
 488           action->finish = date;
 489           cpu_action_state_set(action, SURF_ACTION_FAILED);
 490         }
 491       }
 492     }
 493     if (tmgr_trace_event_free(event_type))
 494       cpu->state_event = NULL;
 495   } else {
 496     XBT_CRITICAL("Unknown event ! \n");
 497     xbt_abort();
 498   }
 499
 500   return;
 501 }
 502
 503 static surf_action_t cpu_execute(void *cpu, double size)
 504 {
 505   surf_action_cpu_Cas01_t action = NULL;
 506   cpu_Cas01_t CPU = cpu;
 507
 508   XBT_IN("(%s,%g)", surf_resource_name(CPU), size);
 509   action =
 510       surf_action_new(sizeof(s_surf_action_cpu_Cas01_t), size,
 511                       surf_cpu_model,
 512                       CPU->state_current != SURF_RESOURCE_ON);
 513
 514   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 515                                                    calloc but it seems to help valgrind... */
 516
 517   GENERIC_LMM_ACTION(action).variable =
 518       lmm_variable_new(cpu_maxmin_system, action,
 519                        GENERIC_ACTION(action).priority,
 520                        CPU->power_scale * CPU->power_peak, 1);
 521   if (cpu_update_mechanism == UM_LAZY) {
 522     action->index_heap = -1;
 523     action->last_update = surf_get_clock();
 524   }
 525   lmm_expand(cpu_maxmin_system, CPU->constraint,
 526              GENERIC_LMM_ACTION(action).variable, 1.0);
 527   XBT_OUT();
 528   return (surf_action_t) action;
 529 }
 530
 531 static surf_action_t cpu_action_sleep(void *cpu, double duration)
 532 {
 533   surf_action_cpu_Cas01_t action = NULL;
 534
 535   if (duration > 0)
 536     duration = MAX(duration, MAXMIN_PRECISION);
 537
 538   XBT_IN("(%s,%g)", surf_resource_name(cpu), duration);
 539   action = (surf_action_cpu_Cas01_t) cpu_execute(cpu, 1.0);
 540   GENERIC_ACTION(action).max_duration = duration;
 541   GENERIC_LMM_ACTION(action).suspended = 2;
 542   if (duration == NO_MAX_DURATION) {
 543     /* Move to the *end* of the corresponding action set. This convention
 544        is used to speed up update_resource_state  */
 545     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 546     ((surf_action_t) action)->state_set =
 547         cpu_running_action_set_that_does_not_need_being_checked;
 548     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 549   }
 550
 551   lmm_update_variable_weight(cpu_maxmin_system,
 552                              GENERIC_LMM_ACTION(action).variable, 0.0);
 553   if (cpu_update_mechanism == UM_LAZY) {     // remove action from the heap
 554     heap_remove((surf_action_cpu_Cas01_t) action);
 555     // this is necessary for a variable with weight 0 since such
 556     // variables are ignored in lmm and we need to set its max_duration
 557     // correctly at the next call to share_resources
 558     xbt_swag_insert_at_head(action,cpu_modified_set);
 559   }
 560
 561   XBT_OUT();
 562   return (surf_action_t) action;
 563 }
 564
 565 static void cpu_action_suspend(surf_action_t action)
 566 {
 567   XBT_IN("(%p)", action);
 568   if (((surf_action_lmm_t) action)->suspended != 2) {
 569     lmm_update_variable_weight(cpu_maxmin_system,
 570                                ((surf_action_lmm_t) action)->variable,
 571                                0.0);
 572     ((surf_action_lmm_t) action)->suspended = 1;
 573     if (cpu_update_mechanism == UM_LAZY)
 574       heap_remove((surf_action_cpu_Cas01_t) action);
 575   }
 576   XBT_OUT();
 577 }
 578
 579 static void cpu_action_resume(surf_action_t action)
 580 {
 581
 582   XBT_IN("(%p)", action);
 583   if (((surf_action_lmm_t) action)->suspended != 2) {
 584     lmm_update_variable_weight(cpu_maxmin_system,
 585                                ((surf_action_lmm_t) action)->variable,
 586                                action->priority);
 587     ((surf_action_lmm_t) action)->suspended = 0;
 588     if (cpu_update_mechanism == UM_LAZY)
 589       heap_remove((surf_action_cpu_Cas01_t) action);
 590   }
 591   XBT_OUT();
 592 }
 593
 594 static int cpu_action_is_suspended(surf_action_t action)
 595 {
 596   return (((surf_action_lmm_t) action)->suspended == 1);
 597 }
 598
 599 static void cpu_action_set_max_duration(surf_action_t action,
 600                                         double duration)
 601 {
 602   XBT_IN("(%p,%g)", action, duration);
 603
 604   action->max_duration = duration;
 605   if (cpu_update_mechanism == UM_LAZY)
 606     heap_remove((surf_action_cpu_Cas01_t) action);
 607   XBT_OUT();
 608 }
 609
 610 static void cpu_action_set_priority(surf_action_t action, double priority)
 611 {
 612   XBT_IN("(%p,%g)", action, priority);
 613   action->priority = priority;
 614   lmm_update_variable_weight(cpu_maxmin_system,
 615                              ((surf_action_lmm_t) action)->variable,
 616                              priority);
 617
 618   if (cpu_update_mechanism == UM_LAZY)
 619     heap_remove((surf_action_cpu_Cas01_t) action);
 620   XBT_OUT();
 621 }
 622
 623 #ifdef HAVE_TRACING
 624 static void cpu_action_set_category(surf_action_t action,
 625                                     const char *category)
 626 {
 627   XBT_IN("(%p,%s)", action, category);
 628   action->category = xbt_strdup(category);
 629   XBT_OUT();
 630 }
 631 #endif
 632
 633 static double cpu_action_get_remains(surf_action_t action)
 634 {
 635   XBT_IN("(%p)", action);
 636   /* update remains before return it */
 637   if (cpu_update_mechanism == UM_LAZY)
 638     update_action_remaining_lazy(surf_get_clock());
 639   XBT_OUT();
 640   return action->remains;
 641 }
 642
 643 static e_surf_resource_state_t cpu_get_state(void *cpu)
 644 {
 645   return ((cpu_Cas01_t) cpu)->state_current;
 646 }
 647
 648 static double cpu_get_speed(void *cpu, double load)
 649 {
 650   return load * (((cpu_Cas01_t) cpu)->power_peak);
 651 }
 652
 653 static double cpu_get_available_speed(void *cpu)
 654 {
 655   /* number between 0 and 1 */
 656   return ((cpu_Cas01_t) cpu)->power_scale;
 657 }
 658
 659 static void cpu_action_update_index_heap(void *action, int i)
 660 {
 661   ((surf_action_cpu_Cas01_t) action)->index_heap = i;
 662 }
 663
 664 static void cpu_finalize(void)
 665 {
 666   lmm_system_free(cpu_maxmin_system);
 667   cpu_maxmin_system = NULL;
 668
 669   surf_model_exit(surf_cpu_model);
 670   surf_cpu_model = NULL;
 671
 672   xbt_swag_free(cpu_running_action_set_that_does_not_need_being_checked);
 673   cpu_running_action_set_that_does_not_need_being_checked = NULL;
 674   if (cpu_action_heap)
 675     xbt_heap_free(cpu_action_heap);
 676 }
 677
 678 static void surf_cpu_model_init_internal()
 679 {
 680   s_surf_action_t action;
 681   s_surf_action_cpu_Cas01_t comp;
 682
 683   surf_cpu_model = surf_model_init();
 684
 685   cpu_running_action_set_that_does_not_need_being_checked =
 686       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 687
 688   surf_cpu_model->name = "cpu";
 689
 690   surf_cpu_model->action_unref = cpu_action_unref;
 691   surf_cpu_model->action_cancel = cpu_action_cancel;
 692   surf_cpu_model->action_state_set = cpu_action_state_set;
 693
 694   surf_cpu_model->model_private->resource_used = cpu_resource_used;
 695
 696   if (cpu_update_mechanism == UM_LAZY) {
 697     surf_cpu_model->model_private->share_resources =
 698         cpu_share_resources_lazy;
 699     surf_cpu_model->model_private->update_actions_state =
 700         cpu_update_actions_state_lazy;
 701   } else if (cpu_update_mechanism == UM_FULL) {
 702     surf_cpu_model->model_private->share_resources =
 703         cpu_share_resources_full;
 704     surf_cpu_model->model_private->update_actions_state =
 705         cpu_update_actions_state_full;
 706   } else
 707     xbt_die("Invalid update mechanism!");
 708
 709   surf_cpu_model->model_private->update_resource_state =
 710       cpu_update_resource_state;
 711   surf_cpu_model->model_private->finalize = cpu_finalize;
 712
 713   surf_cpu_model->suspend = cpu_action_suspend;
 714   surf_cpu_model->resume = cpu_action_resume;
 715   surf_cpu_model->is_suspended = cpu_action_is_suspended;
 716   surf_cpu_model->set_max_duration = cpu_action_set_max_duration;
 717   surf_cpu_model->set_priority = cpu_action_set_priority;
 718 #ifdef HAVE_TRACING
 719   surf_cpu_model->set_category = cpu_action_set_category;
 720 #endif
 721   surf_cpu_model->get_remains = cpu_action_get_remains;
 722
 723   surf_cpu_model->extension.cpu.execute = cpu_execute;
 724   surf_cpu_model->extension.cpu.sleep = cpu_action_sleep;
 725
 726   surf_cpu_model->extension.cpu.get_state = cpu_get_state;
 727   surf_cpu_model->extension.cpu.get_speed = cpu_get_speed;
 728   surf_cpu_model->extension.cpu.get_available_speed =
 729       cpu_get_available_speed;
 730   surf_cpu_model->extension.cpu.create_resource = cpu_create_resource;
 731   surf_cpu_model->extension.cpu.add_traces = cpu_add_traces_cpu;
 732
 733   if (!cpu_maxmin_system) {
 734     cpu_maxmin_system = lmm_system_new(cpu_selective_update);
 735   }
 736   if (cpu_update_mechanism == UM_LAZY) {
 737     cpu_action_heap = xbt_heap_new(8, NULL);
 738     xbt_heap_set_update_callback(cpu_action_heap,
 739                                  cpu_action_update_index_heap);
 740     cpu_modified_set =
 741         xbt_swag_new(xbt_swag_offset(comp, action_list_hookup));
 742     cpu_maxmin_system->keep_track = cpu_modified_set;
 743   }
 744 }
 745
 746 /*********************************************************************/
 747 /* Basic sharing model for CPU: that is where all this started... ;) */
 748 /*********************************************************************/
 749 /* @InProceedings{casanova01simgrid, */
 750 /*   author =       "H. Casanova", */
 751 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 752 /*                  and the Grid (CCGrid'01)", */
 753 /*   publisher =    "IEEE Computer Society", */
 754 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 755 /*                  Scheduling", */
 756 /*   year =         "2001", */
 757 /*   month =        may, */
 758 /*   note =         "Available at */
 759 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 760 /* } */
 761
 762 void surf_cpu_model_init_Cas01()
 763 {
 764   char *optim = xbt_cfg_get_string(_surf_cfg_set, "cpu/optim");
 765   int select =
 766       xbt_cfg_get_int(_surf_cfg_set, "cpu/maxmin_selective_update");
 767
 768   if (!strcmp(optim, "Full")) {
 769     cpu_update_mechanism = UM_FULL;
 770     cpu_selective_update = select;
 771   } else if (!strcmp(optim, "Lazy")) {
 772     cpu_update_mechanism = UM_LAZY;
 773     cpu_selective_update = 1;
 774     xbt_assert((select == 1)
 775                ||
 776                (xbt_cfg_is_default_value
 777                 (_surf_cfg_set, "cpu/maxmin_selective_update")),
 778                "Disabling selective update while using the lazy update mechanism is dumb!");
 779   } else if (!strcmp(optim, "TI")) {
 780     surf_cpu_model_init_ti();
 781     return;
 782   } else {
 783     xbt_die("Unsupported optimization (%s) for this model", optim);
 784   }
 785
 786   if (surf_cpu_model)
 787     return;
 788   surf_cpu_model_init_internal();
 789   cpu_define_callbacks();
 790   xbt_dynar_push(model_list, &surf_cpu_model);
 791 }