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_surf_action_cpu_Cas01_t, *surf_action_cpu_Cas01_t;
  29
  30 typedef struct cpu_Cas01 {
  31   s_surf_resource_t generic_resource;
  32   s_xbt_swag_hookup_t modified_cpu_hookup;
  33   double power_peak;
  34   double power_scale;
  35   tmgr_trace_event_t power_event;
  36   int core;
  37   e_surf_resource_state_t state_current;
  38   tmgr_trace_event_t state_event;
  39   lmm_constraint_t constraint;
  40 } s_cpu_Cas01_t, *cpu_Cas01_t;
  41
  42 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu, surf,
  43                                 "Logging specific to the SURF CPU IMPROVED module");
  44
  45
  46
  47 static xbt_swag_t
  48     cpu_running_action_set_that_does_not_need_being_checked = NULL;
  49
  50 /* added to manage the communication action's heap */
  51 static void net_action_update_index_heap(void *action, int i)
  52 {
  53   surf_action_cpu_Cas01_t a = action;
  54   GENERIC_LMM_ACTION(a).index_heap = i;
  55 }
  56
  57 /* insert action on heap using a given key and a hat (heap_action_type)
  58  * a hat can be of three types for communications:
  59  *
  60  * NORMAL = this is a normal heap entry stating the date to finish transmitting
  61  * LATENCY = this is a heap entry to warn us when the latency is payed
  62  * MAX_DURATION =this is a heap entry to warn us when the max_duration limit is reached
  63  */
  64 static void heap_insert(surf_action_cpu_Cas01_t action, double key,
  65                         enum heap_action_type hat)
  66 {
  67   GENERIC_LMM_ACTION(action).hat = hat;
  68   xbt_heap_push(cpu_action_heap, action, key);
  69 }
  70
  71 static void heap_remove(surf_action_cpu_Cas01_t action)
  72 {
  73   GENERIC_LMM_ACTION(action).hat = NOTSET;
  74   if (GENERIC_LMM_ACTION(action).index_heap >= 0) {
  75     xbt_heap_remove(cpu_action_heap, GENERIC_LMM_ACTION(action).index_heap);
  76   }
  77 }
  78
  79 static void *cpu_create_resource(const char *name, double power_peak,
  80                                  double power_scale,
  81                                  tmgr_trace_t power_trace,
  82                                  int core,
  83                                  e_surf_resource_state_t state_initial,
  84                                  tmgr_trace_t state_trace,
  85                                  xbt_dict_t cpu_properties)
  86 {
  87   cpu_Cas01_t cpu = NULL;
  88
  89   xbt_assert(!surf_cpu_resource_by_name(name),
  90              "Host '%s' declared several times in the platform file",
  91              name);
  92   cpu = (cpu_Cas01_t) surf_resource_new(sizeof(s_cpu_Cas01_t),
  93                                         surf_cpu_model, name,
  94                                         cpu_properties);
  95   cpu->power_peak = power_peak;
  96   xbt_assert(cpu->power_peak > 0, "Power has to be >0");
  97   cpu->power_scale = power_scale;
  98   cpu->core = core;
  99   xbt_assert(core > 0, "Invalid number of cores %d", core);
 100
 101   if (power_trace)
 102     cpu->power_event =
 103         tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
 104
 105   cpu->state_current = state_initial;
 106   if (state_trace)
 107     cpu->state_event =
 108         tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
 109
 110   cpu->constraint =
 111       lmm_constraint_new(cpu_maxmin_system, cpu,
 112                          cpu->core * cpu->power_scale * cpu->power_peak);
 113
 114   xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, cpu);
 115
 116   return cpu;
 117 }
 118
 119
 120 static void parse_cpu_init(sg_platf_host_cbarg_t host)
 121 {
 122   cpu_create_resource(host->id,
 123                       host->power_peak,
 124                       host->power_scale,
 125                       host->power_trace,
 126                       host->core_amount,
 127                       host->initial_state,
 128                       host->state_trace, host->properties);
 129 }
 130
 131 static void cpu_add_traces_cpu(void)
 132 {
 133   xbt_dict_cursor_t cursor = NULL;
 134   char *trace_name, *elm;
 135   static int called = 0;
 136   if (called)
 137     return;
 138   called = 1;
 139
 140   /* connect all traces relative to hosts */
 141   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 142     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 143     cpu_Cas01_t host = surf_cpu_resource_by_name(elm);
 144
 145     xbt_assert(host, "Host %s undefined", elm);
 146     xbt_assert(trace, "Trace %s undefined", trace_name);
 147
 148     host->state_event =
 149         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 150   }
 151
 152   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 153     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 154     cpu_Cas01_t host = surf_cpu_resource_by_name(elm);
 155
 156     xbt_assert(host, "Host %s undefined", elm);
 157     xbt_assert(trace, "Trace %s undefined", trace_name);
 158
 159     host->power_event =
 160         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 161   }
 162 }
 163
 164 static void cpu_define_callbacks()
 165 {
 166   sg_platf_host_add_cb(parse_cpu_init);
 167   sg_platf_postparse_add_cb(cpu_add_traces_cpu);
 168 }
 169
 170 static int cpu_resource_used(void *resource)
 171 {
 172   return lmm_constraint_used(cpu_maxmin_system,
 173                              ((cpu_Cas01_t) resource)->constraint);
 174 }
 175
 176 static int cpu_action_unref(surf_action_t action)
 177 {
 178   action->refcount--;
 179   if (!action->refcount) {
 180     xbt_swag_remove(action, action->state_set);
 181     if (((surf_action_lmm_t) action)->variable)
 182       lmm_variable_free(cpu_maxmin_system,
 183                         ((surf_action_lmm_t) action)->variable);
 184     if (cpu_update_mechanism == UM_LAZY) {
 185       /* remove from heap */
 186       heap_remove((surf_action_cpu_Cas01_t) action);
 187       xbt_swag_remove(action, cpu_modified_set);
 188     }
 189 #ifdef HAVE_TRACING
 190     xbt_free(action->category);
 191 #endif
 192     surf_action_free(&action);
 193     return 1;
 194   }
 195   return 0;
 196 }
 197
 198 static void cpu_action_cancel(surf_action_t action)
 199 {
 200   surf_action_state_set(action, SURF_ACTION_FAILED);
 201   if (cpu_update_mechanism == UM_LAZY) {
 202     xbt_swag_remove(action, cpu_modified_set);
 203     heap_remove((surf_action_cpu_Cas01_t) action);
 204   }
 205   return;
 206 }
 207
 208 static void cpu_action_state_set(surf_action_t action,
 209                                      e_surf_action_state_t state)
 210 {
 211 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 212 /*     if(((surf_action_lmm_t)action)->variable) { */
 213 /*       lmm_variable_disable(cpu_maxmin_system, ((surf_action_lmm_t)action)->variable); */
 214 /*       ((surf_action_lmm_t)action)->variable = NULL; */
 215 /*     } */
 216
 217   surf_action_state_set(action, state);
 218   return;
 219 }
 220
 221 static void update_action_remaining_lazy(double now)
 222 {
 223   surf_action_cpu_Cas01_t action;
 224   double delta = 0.0;
 225
 226   xbt_swag_foreach(action, cpu_modified_set) {
 227     if (GENERIC_ACTION(action).state_set !=
 228         surf_cpu_model->states.running_action_set)
 229       continue; // FIXME useless ????
 230
 231     /* bogus priority, skip it */
 232     if (GENERIC_ACTION(action).priority <= 0)
 233       continue;
 234
 235     delta = now - GENERIC_LMM_ACTION(action).last_update;
 236     if (GENERIC_ACTION(action).remains > 0) {
 237
 238       double_update(&(GENERIC_ACTION(action).remains),
 239                     lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * delta);
 240
 241 #ifdef HAVE_TRACING
 242       if (TRACE_is_enabled()) {
 243         cpu_Cas01_t cpu =
 244             lmm_constraint_id(lmm_get_cnst_from_var
 245                               (cpu_maxmin_system,
 246                                GENERIC_LMM_ACTION(action).variable, 0));
 247         TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 248                                         ((surf_action_t)action)->category,
 249                                         lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable),
 250                                         GENERIC_LMM_ACTION(action).last_update,
 251                                         now - GENERIC_LMM_ACTION(action).last_update);
 252       }
 253 #endif
 254       XBT_DEBUG("Update action(%p) remains %lf", action,
 255                 GENERIC_ACTION(action).remains);
 256     }
 257     GENERIC_LMM_ACTION(action).last_update = now;
 258   }
 259
 260 }
 261
 262 static double cpu_share_resources_lazy(double now)
 263 {
 264   surf_action_cpu_Cas01_t action = NULL;
 265   double min = -1;
 266   double value;
 267
 268   XBT_DEBUG
 269       ("Before share resources, the size of modified actions set is %d",
 270        xbt_swag_size(cpu_modified_set));
 271   update_action_remaining_lazy(now);
 272
 273   lmm_solve(cpu_maxmin_system);
 274
 275   XBT_DEBUG
 276       ("After share resources, The size of modified actions set is %d",
 277        xbt_swag_size(cpu_modified_set));
 278
 279   xbt_swag_foreach(action, cpu_modified_set) {
 280     int max_dur_flag = 0;
 281
 282     if (GENERIC_ACTION(action).state_set !=
 283         surf_cpu_model->states.running_action_set)
 284       continue;
 285
 286     /* bogus priority, skip it */
 287     if (GENERIC_ACTION(action).priority <= 0)
 288       continue;
 289
 290     min = -1;
 291     value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 292     if (value > 0) {
 293       if (GENERIC_ACTION(action).remains > 0) {
 294         value = GENERIC_ACTION(action).remains / value;
 295         min = now + value;
 296       } else {
 297         value = 0.0;
 298         min = now;
 299       }
 300     }
 301
 302     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 303         && (min == -1
 304             || GENERIC_ACTION(action).start +
 305             GENERIC_ACTION(action).max_duration < min)) {
 306       min = GENERIC_ACTION(action).start +
 307           GENERIC_ACTION(action).max_duration;
 308       max_dur_flag = 1;
 309     }
 310
 311     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 312         GENERIC_ACTION(action).start, now + value,
 313         GENERIC_ACTION(action).max_duration);
 314
 315     if (min != -1) {
 316       heap_remove(action);
 317       heap_insert(action, min, max_dur_flag ? MAX_DURATION : NORMAL);
 318       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 319                 now);
 320     } else DIE_IMPOSSIBLE;
 321   }
 322
 323   //hereafter must have already the min value for this resource model
 324   if (xbt_heap_size(cpu_action_heap) > 0)
 325     min = xbt_heap_maxkey(cpu_action_heap) - now;
 326   else
 327     min = -1;
 328
 329   XBT_DEBUG("The minimum with the HEAP %lf", min);
 330
 331   return min;
 332 }
 333
 334 static double cpu_share_resources_full(double now)
 335 {
 336   s_surf_action_cpu_Cas01_t action;
 337   return generic_maxmin_share_resources(surf_cpu_model->states.
 338                                         running_action_set,
 339                                         xbt_swag_offset(action,
 340                                                         generic_lmm_action.
 341                                                         variable),
 342                                         cpu_maxmin_system, lmm_solve);
 343 }
 344
 345 static void cpu_update_actions_state_lazy(double now, double delta)
 346 {
 347   surf_action_cpu_Cas01_t action;
 348   while ((xbt_heap_size(cpu_action_heap) > 0)
 349          && (double_equals(xbt_heap_maxkey(cpu_action_heap), now))) {
 350     action = xbt_heap_pop(cpu_action_heap);
 351     XBT_DEBUG("Action %p: finish", action);
 352     GENERIC_ACTION(action).finish = surf_get_clock();
 353 #ifdef HAVE_TRACING
 354     if (TRACE_is_enabled()) {
 355       cpu_Cas01_t cpu =
 356           lmm_constraint_id(lmm_get_cnst_from_var
 357                             (cpu_maxmin_system,
 358                              GENERIC_LMM_ACTION(action).variable, 0));
 359       TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 360                                       ((surf_action_t)action)->category,
 361                                       lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable),
 362                                       GENERIC_LMM_ACTION(action).last_update,
 363                                       now - GENERIC_LMM_ACTION(action).last_update);
 364     }
 365 #endif
 366     /* set the remains to 0 due to precision problems when updating the remaining amount */
 367     GENERIC_ACTION(action).remains = 0;
 368     cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 369     heap_remove(action);
 370   }
 371 #ifdef HAVE_TRACING
 372   if (TRACE_is_enabled()) {
 373     //defining the last timestamp that we can safely dump to trace file
 374     //without losing the event ascending order (considering all CPU's)
 375     double smaller = -1;
 376     xbt_swag_t running_actions = surf_cpu_model->states.running_action_set;
 377     xbt_swag_foreach(action, running_actions) {
 378         if (smaller < 0) {
 379           smaller = GENERIC_LMM_ACTION(action).last_update;
 380           continue;
 381         }
 382         if (GENERIC_LMM_ACTION(action).last_update < smaller) {
 383           smaller = GENERIC_LMM_ACTION(action).last_update;
 384         }
 385     }
 386     if (smaller > 0) {
 387       TRACE_last_timestamp_to_dump = smaller;
 388     }
 389   }
 390 #endif
 391   return;
 392 }
 393
 394 static void cpu_update_actions_state_full(double now, double delta)
 395 {
 396   surf_action_cpu_Cas01_t action = NULL;
 397   surf_action_cpu_Cas01_t next_action = NULL;
 398   xbt_swag_t running_actions = surf_cpu_model->states.running_action_set;
 399   xbt_swag_foreach_safe(action, next_action, running_actions) {
 400 #ifdef HAVE_TRACING
 401     if (TRACE_is_enabled()) {
 402       cpu_Cas01_t x =
 403           lmm_constraint_id(lmm_get_cnst_from_var
 404                             (cpu_maxmin_system,
 405                              GENERIC_LMM_ACTION(action).variable, 0));
 406
 407       TRACE_surf_host_set_utilization(x->generic_resource.name,
 408                                       ((surf_action_t)action)->category,
 409                                       lmm_variable_getvalue(GENERIC_LMM_ACTION(action).
 410                                        variable),
 411                                       now - delta,
 412                                       delta);
 413       TRACE_last_timestamp_to_dump = now - delta;
 414     }
 415 #endif
 416     double_update(&(GENERIC_ACTION(action).remains),
 417                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).
 418                                         variable) * delta);
 419     if (GENERIC_LMM_ACTION(action).generic_action.max_duration !=
 420         NO_MAX_DURATION)
 421       double_update(&(GENERIC_ACTION(action).max_duration), delta);
 422     if ((GENERIC_ACTION(action).remains <= 0) &&
 423         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) >
 424          0)) {
 425       GENERIC_ACTION(action).finish = surf_get_clock();
 426       cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 427     } else if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION) &&
 428                (GENERIC_ACTION(action).max_duration <= 0)) {
 429       GENERIC_ACTION(action).finish = surf_get_clock();
 430       cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 431     }
 432   }
 433
 434   return;
 435 }
 436
 437 static void cpu_update_resource_state(void *id,
 438                                       tmgr_trace_event_t event_type,
 439                                       double value, double date)
 440 {
 441   cpu_Cas01_t cpu = id;
 442   lmm_variable_t var = NULL;
 443   lmm_element_t elem = NULL;
 444
 445   if (event_type == cpu->power_event) {
 446     cpu->power_scale = value;
 447     lmm_update_constraint_bound(cpu_maxmin_system, cpu->constraint,
 448                                 cpu->core * cpu->power_scale *
 449                                 cpu->power_peak);
 450 #ifdef HAVE_TRACING
 451     TRACE_surf_host_set_power(date, cpu->generic_resource.name,
 452                               cpu->core * cpu->power_scale *
 453                               cpu->power_peak);
 454 #endif
 455     while ((var = lmm_get_var_from_cnst
 456             (cpu_maxmin_system, cpu->constraint, &elem))) {
 457       surf_action_cpu_Cas01_t action = lmm_variable_id(var);
 458       lmm_update_variable_bound(cpu_maxmin_system,
 459                                 GENERIC_LMM_ACTION(action).variable,
 460                                 cpu->power_scale * cpu->power_peak);
 461     }
 462     if (tmgr_trace_event_free(event_type))
 463       cpu->power_event = NULL;
 464   } else if (event_type == cpu->state_event) {
 465     if (value > 0)
 466       cpu->state_current = SURF_RESOURCE_ON;
 467     else {
 468       lmm_constraint_t cnst = cpu->constraint;
 469
 470       cpu->state_current = SURF_RESOURCE_OFF;
 471
 472       while ((var = lmm_get_var_from_cnst(cpu_maxmin_system, cnst, &elem))) {
 473         surf_action_t action = lmm_variable_id(var);
 474
 475         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 476             surf_action_state_get(action) == SURF_ACTION_READY ||
 477             surf_action_state_get(action) ==
 478             SURF_ACTION_NOT_IN_THE_SYSTEM) {
 479           action->finish = date;
 480           cpu_action_state_set(action, SURF_ACTION_FAILED);
 481         }
 482       }
 483     }
 484     if (tmgr_trace_event_free(event_type))
 485       cpu->state_event = NULL;
 486   } else {
 487     XBT_CRITICAL("Unknown event ! \n");
 488     xbt_abort();
 489   }
 490
 491   return;
 492 }
 493
 494 static surf_action_t cpu_execute(void *cpu, double size)
 495 {
 496   surf_action_cpu_Cas01_t action = NULL;
 497   cpu_Cas01_t CPU = cpu;
 498
 499   XBT_IN("(%s,%g)", surf_resource_name(CPU), size);
 500   action =
 501       surf_action_new(sizeof(s_surf_action_cpu_Cas01_t), size,
 502                       surf_cpu_model,
 503                       CPU->state_current != SURF_RESOURCE_ON);
 504
 505   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 506                                                    calloc but it seems to help valgrind... */
 507
 508   GENERIC_LMM_ACTION(action).variable =
 509       lmm_variable_new(cpu_maxmin_system, action,
 510                        GENERIC_ACTION(action).priority,
 511                        CPU->power_scale * CPU->power_peak, 1);
 512   if (cpu_update_mechanism == UM_LAZY) {
 513     GENERIC_LMM_ACTION(action).index_heap = -1;
 514     GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 515   }
 516   lmm_expand(cpu_maxmin_system, CPU->constraint,
 517              GENERIC_LMM_ACTION(action).variable, 1.0);
 518   XBT_OUT();
 519   return (surf_action_t) action;
 520 }
 521
 522 static surf_action_t cpu_action_sleep(void *cpu, double duration)
 523 {
 524   surf_action_cpu_Cas01_t action = NULL;
 525
 526   if (duration > 0)
 527     duration = MAX(duration, MAXMIN_PRECISION);
 528
 529   XBT_IN("(%s,%g)", surf_resource_name(cpu), duration);
 530   action = (surf_action_cpu_Cas01_t) cpu_execute(cpu, 1.0);
 531   GENERIC_ACTION(action).max_duration = duration;
 532   GENERIC_LMM_ACTION(action).suspended = 2;
 533   if (duration == NO_MAX_DURATION) {
 534     /* Move to the *end* of the corresponding action set. This convention
 535        is used to speed up update_resource_state  */
 536     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 537     ((surf_action_t) action)->state_set =
 538         cpu_running_action_set_that_does_not_need_being_checked;
 539     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 540   }
 541
 542   lmm_update_variable_weight(cpu_maxmin_system,
 543                              GENERIC_LMM_ACTION(action).variable, 0.0);
 544   if (cpu_update_mechanism == UM_LAZY) {     // remove action from the heap
 545     heap_remove((surf_action_cpu_Cas01_t) action);
 546     // this is necessary for a variable with weight 0 since such
 547     // variables are ignored in lmm and we need to set its max_duration
 548     // correctly at the next call to share_resources
 549     xbt_swag_insert_at_head(action,cpu_modified_set);
 550   }
 551
 552   XBT_OUT();
 553   return (surf_action_t) action;
 554 }
 555
 556 static void cpu_action_suspend(surf_action_t action)
 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                                0.0);
 563     ((surf_action_lmm_t) action)->suspended = 1;
 564     if (cpu_update_mechanism == UM_LAZY)
 565       heap_remove((surf_action_cpu_Cas01_t) action);
 566   }
 567   XBT_OUT();
 568 }
 569
 570 static void cpu_action_resume(surf_action_t action)
 571 {
 572
 573   XBT_IN("(%p)", action);
 574   if (((surf_action_lmm_t) action)->suspended != 2) {
 575     lmm_update_variable_weight(cpu_maxmin_system,
 576                                ((surf_action_lmm_t) action)->variable,
 577                                action->priority);
 578     ((surf_action_lmm_t) action)->suspended = 0;
 579     if (cpu_update_mechanism == UM_LAZY)
 580       heap_remove((surf_action_cpu_Cas01_t) action);
 581   }
 582   XBT_OUT();
 583 }
 584
 585 static int cpu_action_is_suspended(surf_action_t action)
 586 {
 587   return (((surf_action_lmm_t) action)->suspended == 1);
 588 }
 589
 590 static void cpu_action_set_max_duration(surf_action_t action,
 591                                         double duration)
 592 {
 593   XBT_IN("(%p,%g)", action, duration);
 594
 595   action->max_duration = duration;
 596   if (cpu_update_mechanism == UM_LAZY)
 597     heap_remove((surf_action_cpu_Cas01_t) action);
 598   XBT_OUT();
 599 }
 600
 601 static void cpu_action_set_priority(surf_action_t action, double priority)
 602 {
 603   XBT_IN("(%p,%g)", action, priority);
 604   action->priority = priority;
 605   lmm_update_variable_weight(cpu_maxmin_system,
 606                              ((surf_action_lmm_t) action)->variable,
 607                              priority);
 608
 609   if (cpu_update_mechanism == UM_LAZY)
 610     heap_remove((surf_action_cpu_Cas01_t) action);
 611   XBT_OUT();
 612 }
 613
 614 #ifdef HAVE_TRACING
 615 static void cpu_action_set_category(surf_action_t action,
 616                                     const char *category)
 617 {
 618   XBT_IN("(%p,%s)", action, category);
 619   action->category = xbt_strdup(category);
 620   XBT_OUT();
 621 }
 622 #endif
 623
 624 static double cpu_action_get_remains(surf_action_t action)
 625 {
 626   XBT_IN("(%p)", action);
 627   /* update remains before return it */
 628   if (cpu_update_mechanism == UM_LAZY)
 629     update_action_remaining_lazy(surf_get_clock());
 630   XBT_OUT();
 631   return action->remains;
 632 }
 633
 634 static e_surf_resource_state_t cpu_get_state(void *cpu)
 635 {
 636   return ((cpu_Cas01_t) cpu)->state_current;
 637 }
 638
 639 static double cpu_get_speed(void *cpu, double load)
 640 {
 641   return load * (((cpu_Cas01_t) cpu)->power_peak);
 642 }
 643
 644 static double cpu_get_available_speed(void *cpu)
 645 {
 646   /* number between 0 and 1 */
 647   return ((cpu_Cas01_t) cpu)->power_scale;
 648 }
 649
 650 static void cpu_finalize(void)
 651 {
 652   lmm_system_free(cpu_maxmin_system);
 653   cpu_maxmin_system = NULL;
 654
 655   surf_model_exit(surf_cpu_model);
 656   surf_cpu_model = NULL;
 657
 658   xbt_swag_free(cpu_running_action_set_that_does_not_need_being_checked);
 659   cpu_running_action_set_that_does_not_need_being_checked = NULL;
 660   if (cpu_action_heap)
 661     xbt_heap_free(cpu_action_heap);
 662 }
 663
 664 static void surf_cpu_model_init_internal()
 665 {
 666   s_surf_action_t action;
 667   s_surf_action_cpu_Cas01_t comp;
 668
 669   surf_cpu_model = surf_model_init();
 670
 671   cpu_running_action_set_that_does_not_need_being_checked =
 672       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 673
 674   surf_cpu_model->name = "cpu";
 675
 676   surf_cpu_model->action_unref = cpu_action_unref;
 677   surf_cpu_model->action_cancel = cpu_action_cancel;
 678   surf_cpu_model->action_state_set = cpu_action_state_set;
 679
 680   surf_cpu_model->model_private->resource_used = cpu_resource_used;
 681
 682   if (cpu_update_mechanism == UM_LAZY) {
 683     surf_cpu_model->model_private->share_resources =
 684         cpu_share_resources_lazy;
 685     surf_cpu_model->model_private->update_actions_state =
 686         cpu_update_actions_state_lazy;
 687   } else if (cpu_update_mechanism == UM_FULL) {
 688     surf_cpu_model->model_private->share_resources =
 689         cpu_share_resources_full;
 690     surf_cpu_model->model_private->update_actions_state =
 691         cpu_update_actions_state_full;
 692   } else
 693     xbt_die("Invalid update mechanism!");
 694
 695   surf_cpu_model->model_private->update_resource_state =
 696       cpu_update_resource_state;
 697   surf_cpu_model->model_private->finalize = cpu_finalize;
 698
 699   surf_cpu_model->suspend = cpu_action_suspend;
 700   surf_cpu_model->resume = cpu_action_resume;
 701   surf_cpu_model->is_suspended = cpu_action_is_suspended;
 702   surf_cpu_model->set_max_duration = cpu_action_set_max_duration;
 703   surf_cpu_model->set_priority = cpu_action_set_priority;
 704 #ifdef HAVE_TRACING
 705   surf_cpu_model->set_category = cpu_action_set_category;
 706 #endif
 707   surf_cpu_model->get_remains = cpu_action_get_remains;
 708
 709   surf_cpu_model->extension.cpu.execute = cpu_execute;
 710   surf_cpu_model->extension.cpu.sleep = cpu_action_sleep;
 711
 712   surf_cpu_model->extension.cpu.get_state = cpu_get_state;
 713   surf_cpu_model->extension.cpu.get_speed = cpu_get_speed;
 714   surf_cpu_model->extension.cpu.get_available_speed =
 715       cpu_get_available_speed;
 716   surf_cpu_model->extension.cpu.create_resource = cpu_create_resource;
 717   surf_cpu_model->extension.cpu.add_traces = cpu_add_traces_cpu;
 718
 719   if (!cpu_maxmin_system) {
 720     cpu_maxmin_system = lmm_system_new(cpu_selective_update);
 721   }
 722   if (cpu_update_mechanism == UM_LAZY) {
 723     cpu_action_heap = xbt_heap_new(8, NULL);
 724     xbt_heap_set_update_callback(cpu_action_heap,
 725         net_action_update_index_heap);
 726     cpu_modified_set =
 727         xbt_swag_new(xbt_swag_offset(comp, generic_lmm_action.action_list_hookup));
 728     cpu_maxmin_system->keep_track = cpu_modified_set;
 729   }
 730 }
 731
 732 /*********************************************************************/
 733 /* Basic sharing model for CPU: that is where all this started... ;) */
 734 /*********************************************************************/
 735 /* @InProceedings{casanova01simgrid, */
 736 /*   author =       "H. Casanova", */
 737 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 738 /*                  and the Grid (CCGrid'01)", */
 739 /*   publisher =    "IEEE Computer Society", */
 740 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 741 /*                  Scheduling", */
 742 /*   year =         "2001", */
 743 /*   month =        may, */
 744 /*   note =         "Available at */
 745 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 746 /* } */
 747
 748 void surf_cpu_model_init_Cas01()
 749 {
 750   char *optim = xbt_cfg_get_string(_surf_cfg_set, "cpu/optim");
 751   int select =
 752       xbt_cfg_get_int(_surf_cfg_set, "cpu/maxmin_selective_update");
 753
 754   if (!strcmp(optim, "Full")) {
 755     cpu_update_mechanism = UM_FULL;
 756     cpu_selective_update = select;
 757   } else if (!strcmp(optim, "Lazy")) {
 758     cpu_update_mechanism = UM_LAZY;
 759     cpu_selective_update = 1;
 760     xbt_assert((select == 1)
 761                ||
 762                (xbt_cfg_is_default_value
 763                 (_surf_cfg_set, "cpu/maxmin_selective_update")),
 764                "Disabling selective update while using the lazy update mechanism is dumb!");
 765   } else if (!strcmp(optim, "TI")) {
 766     surf_cpu_model_init_ti();
 767     return;
 768   } else {
 769     xbt_die("Unsupported optimization (%s) for this model", optim);
 770   }
 771
 772   if (surf_cpu_model)
 773     return;
 774   surf_cpu_model_init_internal();
 775   cpu_define_callbacks();
 776   xbt_dynar_push(model_list, &surf_cpu_model);
 777 }