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