src/surf/cpu_im.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 update_mechanism = UM_LAZY;
  13
  14 #undef GENERIC_LMM_ACTION
  15 #undef GENERIC_ACTION
  16 #undef ACTION_GET_CPU
  17 #define GENERIC_LMM_ACTION(action) action->generic_lmm_action
  18 #define GENERIC_ACTION(action) GENERIC_LMM_ACTION(action).generic_action
  19 #define ACTION_GET_CPU(action) ((surf_action_cpu_Cas01_im_t) action)->cpu
  20
  21 typedef struct surf_action_cpu_cas01_im {
  22   s_surf_action_lmm_t generic_lmm_action;
  23   s_xbt_swag_hookup_t cpu_list_hookup;
  24   int index_heap;
  25   void *cpu;
  26 } s_surf_action_cpu_Cas01_im_t, *surf_action_cpu_Cas01_im_t;
  27
  28 typedef struct cpu_Cas01_im {
  29   s_surf_resource_t generic_resource;
  30   s_xbt_swag_hookup_t modified_cpu_hookup;
  31   double power_peak;
  32   double power_scale;
  33   tmgr_trace_event_t power_event;
  34   int core;
  35   e_surf_resource_state_t state_current;
  36   tmgr_trace_event_t state_event;
  37   lmm_constraint_t constraint;
  38   xbt_swag_t action_set;
  39   double last_update;
  40 } s_cpu_Cas01_im_t, *cpu_Cas01_im_t;
  41
  42 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_im, surf,
  43                                 "Logging specific to the SURF CPU IMPROVED module");
  44
  45 lmm_system_t cpu_im_maxmin_system = NULL;
  46 static xbt_swag_t cpu_im_modified_cpu = NULL;
  47 static xbt_heap_t cpu_im_action_heap = NULL;
  48 extern int sg_maxmin_selective_update;
  49
  50
  51 static xbt_swag_t
  52     cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
  53
  54 static void* cpu_im_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_im_t cpu = NULL;
  63   s_surf_action_cpu_Cas01_im_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_im_t) surf_resource_new(sizeof(s_cpu_Cas01_im_t),
  69           surf_cpu_model, name,cpu_properties);
  70   cpu->power_peak = power_peak;
  71   xbt_assert(cpu->power_peak > 0, "Power has to be >0");
  72   cpu->power_scale = power_scale;
  73   cpu->core = core;
  74   xbt_assert(core>0,"Invalid number of cores %d",core);
  75
  76   if (power_trace)
  77     cpu->power_event =
  78         tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
  79
  80   cpu->state_current = state_initial;
  81   if (state_trace)
  82     cpu->state_event =
  83         tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
  84
  85   cpu->constraint =
  86       lmm_constraint_new(cpu_im_maxmin_system, cpu,
  87                          cpu->core * cpu->power_scale * cpu->power_peak);
  88
  89   xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, cpu);
  90   if(update_mechanism == UM_FULL)
  91     cpu->action_set = xbt_swag_new(xbt_swag_offset(action, cpu_list_hookup));
  92
  93   return cpu;
  94 }
  95
  96
  97 static void parse_cpu_im_init(sg_platf_host_cbarg_t host)
  98 {
  99         cpu_im_create_resource(host->id,
 100                           host->power_peak,
 101                           host->power_scale,
 102                           host->power_trace,
 103                           host->core_amount,
 104                           host->initial_state,
 105                           host->state_trace,
 106                           host->properties);
 107 }
 108
 109 static void cpu_im_add_traces_cpu(void)
 110 {
 111   xbt_dict_cursor_t cursor = NULL;
 112   char *trace_name, *elm;
 113   static int called = 0;
 114   if (called)
 115     return;
 116   called = 1;
 117
 118   /* connect all traces relative to hosts */
 119   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 120     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 121     cpu_Cas01_im_t host = surf_cpu_resource_by_name(elm);
 122
 123     xbt_assert(host, "Host %s undefined", elm);
 124     xbt_assert(trace, "Trace %s undefined", trace_name);
 125
 126     host->state_event =
 127         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 128   }
 129
 130   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 131     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 132     cpu_Cas01_im_t host = surf_cpu_resource_by_name(elm);
 133
 134     xbt_assert(host, "Host %s undefined", elm);
 135     xbt_assert(trace, "Trace %s undefined", trace_name);
 136
 137     host->power_event =
 138         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 139   }
 140 }
 141
 142 static void cpu_im_define_callbacks()
 143 {
 144   sg_platf_host_add_cb(parse_cpu_im_init);
 145   sg_platf_postparse_add_cb(cpu_im_add_traces_cpu);
 146 }
 147
 148 static int cpu_im_resource_used(void *resource)
 149 {
 150   return lmm_constraint_used(cpu_im_maxmin_system,
 151                              ((cpu_Cas01_im_t) resource)->constraint);
 152 }
 153
 154 static int cpu_im_action_unref(surf_action_t action)
 155 {
 156   action->refcount--;
 157   if (!action->refcount) {
 158     xbt_swag_remove(action, action->state_set);
 159     if (((surf_action_lmm_t) action)->variable)
 160       lmm_variable_free(cpu_im_maxmin_system,
 161                         ((surf_action_lmm_t) action)->variable);
 162     if(update_mechanism == UM_FULL){
 163     /* remove from heap */
 164     xbt_heap_remove(cpu_im_action_heap,
 165                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 166     xbt_swag_remove(action,
 167                     ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 168     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 169     }
 170 #ifdef HAVE_TRACING
 171     xbt_free(action->category);
 172 #endif
 173     surf_action_free(&action);
 174     return 1;
 175   }
 176   return 0;
 177 }
 178
 179 static void cpu_im_action_cancel(surf_action_t action)
 180 {
 181   surf_action_state_set(action, SURF_ACTION_FAILED);
 182   if(update_mechanism == UM_FULL){
 183   xbt_heap_remove(cpu_im_action_heap,
 184                   ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 185   xbt_swag_remove(action,
 186                   ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 187   }
 188   return;
 189 }
 190
 191 static void cpu_im_cpu_action_state_set(surf_action_t action,
 192                                         e_surf_action_state_t state)
 193 {
 194 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 195 /*     if(((surf_action_lmm_t)action)->variable) { */
 196 /*       lmm_variable_disable(cpu_im_maxmin_system, ((surf_action_lmm_t)action)->variable); */
 197 /*       ((surf_action_lmm_t)action)->variable = NULL; */
 198 /*     } */
 199
 200   surf_action_state_set(action, state);
 201   return;
 202 }
 203
 204 static void cpu_im_update_remains(cpu_Cas01_im_t cpu, double now)
 205 {
 206   surf_action_cpu_Cas01_im_t action;
 207
 208   if (cpu->last_update >= now)
 209     return;
 210   xbt_swag_foreach(action, cpu->action_set) {
 211     if (GENERIC_ACTION(action).state_set !=
 212         surf_cpu_model->states.running_action_set)
 213       continue;
 214
 215     /* bogus priority, skip it */
 216     if (GENERIC_ACTION(action).priority <= 0)
 217       continue;
 218
 219     if (GENERIC_ACTION(action).remains > 0) {
 220       double_update(&(GENERIC_ACTION(action).remains),
 221                     lmm_variable_getvalue(GENERIC_LMM_ACTION
 222                                           (action).variable) * (now -
 223                                                                 cpu->last_update));
 224 #ifdef HAVE_TRACING
 225       if (TRACE_is_enabled()) {
 226         TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 227                                         action->
 228                                         generic_lmm_action.generic_action.
 229                                         data, (surf_action_t) action,
 230                                         lmm_variable_getvalue
 231                                         (GENERIC_LMM_ACTION
 232                                          (action).variable),
 233                                         cpu->last_update,
 234                                         now - cpu->last_update);
 235       }
 236 #endif
 237       XBT_DEBUG("Update action(%p) remains %lf", action,
 238              GENERIC_ACTION(action).remains);
 239     }
 240   }
 241   cpu->last_update = now;
 242 }
 243
 244 static double cpu_im_share_resources(double now)
 245 {
 246   surf_action_cpu_Cas01_im_t action;
 247   double min;
 248   double value;
 249   cpu_Cas01_im_t cpu, cpu_next;
 250
 251   xbt_swag_foreach(cpu, cpu_im_modified_cpu)
 252       cpu_im_update_remains(cpu, now);
 253
 254   lmm_solve(cpu_im_maxmin_system);
 255
 256   xbt_swag_foreach_safe(cpu, cpu_next, cpu_im_modified_cpu) {
 257     xbt_swag_foreach(action, cpu->action_set) {
 258       if (GENERIC_ACTION(action).state_set !=
 259           surf_cpu_model->states.running_action_set)
 260         continue;
 261
 262       /* bogus priority, skip it */
 263       if (GENERIC_ACTION(action).priority <= 0)
 264         continue;
 265
 266       min = -1;
 267       value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 268       if (value > 0) {
 269         if (GENERIC_ACTION(action).remains > 0) {
 270           value = GENERIC_ACTION(action).remains / value;
 271           min = now + value;
 272         } else {
 273           value = 0.0;
 274           min = now;
 275         }
 276       }
 277
 278       if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 279           && (min == -1
 280               || GENERIC_ACTION(action).start +
 281               GENERIC_ACTION(action).max_duration < min))
 282         min =
 283             GENERIC_ACTION(action).start +
 284             GENERIC_ACTION(action).max_duration;
 285
 286       XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 287              GENERIC_ACTION(action).start, now + value,
 288              GENERIC_ACTION(action).max_duration);
 289
 290       if (action->index_heap >= 0) {
 291         surf_action_cpu_Cas01_im_t heap_act =
 292             xbt_heap_remove(cpu_im_action_heap, action->index_heap);
 293         if (heap_act != action)
 294           DIE_IMPOSSIBLE;
 295       }
 296       if (min != -1) {
 297         xbt_heap_push(cpu_im_action_heap, action, min);
 298         XBT_DEBUG("Insert at heap action(%p) min %lf", action, min);
 299       }
 300     }
 301     xbt_swag_remove(cpu, cpu_im_modified_cpu);
 302   }
 303   return xbt_heap_size(cpu_im_action_heap) >
 304       0 ? xbt_heap_maxkey(cpu_im_action_heap) - now : -1;
 305 }
 306
 307 static void cpu_im_update_actions_state(double now, double delta)
 308 {
 309   surf_action_cpu_Cas01_im_t action;
 310   while ((xbt_heap_size(cpu_im_action_heap) > 0)
 311          && (double_equals(xbt_heap_maxkey(cpu_im_action_heap), now))) {
 312     action = xbt_heap_pop(cpu_im_action_heap);
 313     XBT_DEBUG("Action %p: finish", action);
 314     GENERIC_ACTION(action).finish = surf_get_clock();
 315     /* set the remains to 0 due to precision problems when updating the remaining amount */
 316 #ifdef HAVE_TRACING
 317     if (TRACE_is_enabled()) {
 318       cpu_Cas01_im_t cpu = ((cpu_Cas01_im_t)(action->cpu));
 319       TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 320           GENERIC_LMM_ACTION(action).generic_action.data,
 321           (surf_action_t) action,
 322           lmm_variable_getvalue (GENERIC_LMM_ACTION(action).variable),
 323           cpu->last_update,
 324           now - cpu->last_update);
 325     }
 326 #endif
 327     GENERIC_ACTION(action).remains = 0;
 328     cpu_im_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 329     cpu_im_update_remains(action->cpu, surf_get_clock());
 330   }
 331 #ifdef HAVE_TRACING
 332   if (TRACE_is_enabled()) {
 333     //defining the last timestamp that we can safely dump to trace file
 334     //without losing the event ascending order (considering all CPU's)
 335     void **data;
 336     cpu_Cas01_im_t cpu;
 337     xbt_lib_cursor_t cursor;
 338     char *key;
 339     double smaller = -1;
 340     xbt_lib_foreach(host_lib, cursor, key, data){
 341       if(data[SURF_CPU_LEVEL]){
 342         cpu = data[SURF_CPU_LEVEL];
 343         if (smaller < 0){
 344           smaller = cpu->last_update;
 345           continue;
 346         }
 347         if (cpu->last_update < smaller){
 348           smaller = cpu->last_update;
 349         }
 350       }
 351     }
 352     if (smaller > 0) {
 353       TRACE_last_timestamp_to_dump = smaller;
 354     }
 355   }
 356 #endif
 357   return;
 358 }
 359
 360 static void cpu_im_update_resource_state(void *id,
 361                                          tmgr_trace_event_t event_type,
 362                                          double value, double date)
 363 {
 364   cpu_Cas01_im_t cpu = id;
 365   lmm_variable_t var = NULL;
 366   lmm_element_t elem = NULL;
 367
 368   if (event_type == cpu->power_event) {
 369     cpu->power_scale = value;
 370     lmm_update_constraint_bound(cpu_im_maxmin_system, cpu->constraint,
 371                                 cpu->core * cpu->power_scale * cpu->power_peak);
 372 #ifdef HAVE_TRACING
 373     TRACE_surf_host_set_power(date, cpu->generic_resource.name,
 374                               cpu->core * cpu->power_scale * cpu->power_peak);
 375 #endif
 376     while ((var = lmm_get_var_from_cnst
 377             (cpu_im_maxmin_system, cpu->constraint, &elem))) {
 378         surf_action_cpu_Cas01_im_t action = lmm_variable_id(var);
 379         lmm_update_variable_bound(cpu_im_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 380                                   cpu->power_scale * cpu->power_peak);
 381     }
 382     if(update_mechanism == UM_FULL)
 383       xbt_swag_insert(cpu, cpu_im_modified_cpu);
 384     if (tmgr_trace_event_free(event_type))
 385       cpu->power_event = NULL;
 386   } else if (event_type == cpu->state_event) {
 387     if (value > 0)
 388       cpu->state_current = SURF_RESOURCE_ON;
 389     else {
 390       lmm_constraint_t cnst = cpu->constraint;
 391       lmm_variable_t var = NULL;
 392       lmm_element_t elem = NULL;
 393
 394       cpu->state_current = SURF_RESOURCE_OFF;
 395
 396       while ((var =
 397               lmm_get_var_from_cnst(cpu_im_maxmin_system, cnst, &elem))) {
 398         surf_action_t action = lmm_variable_id(var);
 399
 400         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 401             surf_action_state_get(action) == SURF_ACTION_READY ||
 402             surf_action_state_get(action) ==
 403             SURF_ACTION_NOT_IN_THE_SYSTEM) {
 404           action->finish = date;
 405           cpu_im_cpu_action_state_set(action, SURF_ACTION_FAILED);
 406         }
 407       }
 408     }
 409     if (tmgr_trace_event_free(event_type))
 410       cpu->state_event = NULL;
 411   } else {
 412     XBT_CRITICAL("Unknown event ! \n");
 413     xbt_abort();
 414   }
 415
 416   return;
 417 }
 418
 419 static surf_action_t cpu_im_execute(void *cpu, double size)
 420 {
 421   surf_action_cpu_Cas01_im_t action = NULL;
 422   cpu_Cas01_im_t CPU = cpu;
 423
 424   XBT_IN("(%s,%g)", surf_resource_name(CPU), size);
 425   action =
 426       surf_action_new(sizeof(s_surf_action_cpu_Cas01_im_t), size,
 427                       surf_cpu_model,
 428                       CPU->state_current != SURF_RESOURCE_ON);
 429
 430   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 431                                                    calloc but it seems to help valgrind... */
 432
 433   GENERIC_LMM_ACTION(action).variable =
 434       lmm_variable_new(cpu_im_maxmin_system, action,
 435                        GENERIC_ACTION(action).priority, CPU->power_scale * CPU->power_peak, 1);
 436   if(update_mechanism == UM_FULL){
 437     action->index_heap = -1;
 438     action->cpu = CPU;
 439     xbt_swag_insert(CPU, cpu_im_modified_cpu);
 440     xbt_swag_insert(action, CPU->action_set);
 441   }
 442   lmm_expand(cpu_im_maxmin_system, CPU->constraint,
 443              GENERIC_LMM_ACTION(action).variable, 1.0);
 444   XBT_OUT();
 445   return (surf_action_t) action;
 446 }
 447
 448 static surf_action_t cpu_im_action_sleep(void *cpu, double duration)
 449 {
 450   surf_action_cpu_Cas01_im_t action = NULL;
 451
 452   if (duration > 0)
 453     duration = MAX(duration, MAXMIN_PRECISION);
 454
 455   XBT_IN("(%s,%g)", surf_resource_name(cpu), duration);
 456   action = (surf_action_cpu_Cas01_im_t) cpu_im_execute(cpu, 1.0);
 457   GENERIC_ACTION(action).max_duration = duration;
 458   GENERIC_LMM_ACTION(action).suspended = 2;
 459   if (duration == NO_MAX_DURATION) {
 460     /* Move to the *end* of the corresponding action set. This convention
 461        is used to speed up update_resource_state  */
 462     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 463     ((surf_action_t) action)->state_set =
 464         cpu_im_running_action_set_that_does_not_need_being_checked;
 465     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 466   }
 467
 468   lmm_update_variable_weight(cpu_im_maxmin_system,
 469                              GENERIC_LMM_ACTION(action).variable, 0.0);
 470   if(update_mechanism == UM_FULL)
 471     xbt_swag_insert(cpu, cpu_im_modified_cpu);
 472   XBT_OUT();
 473   return (surf_action_t) action;
 474 }
 475
 476 static void cpu_im_action_suspend(surf_action_t action)
 477 {
 478   XBT_IN("(%p)", action);
 479   if (((surf_action_lmm_t) action)->suspended != 2) {
 480     lmm_update_variable_weight(cpu_im_maxmin_system,
 481                                ((surf_action_lmm_t) action)->variable,
 482                                0.0);
 483     ((surf_action_lmm_t) action)->suspended = 1;
 484     if(update_mechanism == UM_FULL){
 485       xbt_heap_remove(cpu_im_action_heap,
 486                       ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 487       xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 488     }
 489   }
 490   XBT_OUT();
 491 }
 492
 493 static void cpu_im_action_resume(surf_action_t action)
 494 {
 495
 496   XBT_IN("(%p)", action);
 497   if (((surf_action_lmm_t) action)->suspended != 2) {
 498     lmm_update_variable_weight(cpu_im_maxmin_system,
 499                                ((surf_action_lmm_t) action)->variable,
 500                                action->priority);
 501     ((surf_action_lmm_t) action)->suspended = 0;
 502     if(update_mechanism == UM_FULL)
 503       xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 504   }
 505   XBT_OUT();
 506 }
 507
 508 static int cpu_im_action_is_suspended(surf_action_t action)
 509 {
 510   return (((surf_action_lmm_t) action)->suspended == 1);
 511 }
 512
 513 static void cpu_im_action_set_max_duration(surf_action_t action,
 514                                            double duration)
 515 {
 516   XBT_IN("(%p,%g)", action, duration);
 517
 518   action->max_duration = duration;
 519   /* insert cpu in modified_cpu set to notice the max duration change */
 520   if(update_mechanism == UM_FULL)
 521     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 522   XBT_OUT();
 523 }
 524
 525 static void cpu_im_action_set_priority(surf_action_t action,
 526                                        double priority)
 527 {
 528   XBT_IN("(%p,%g)", action, priority);
 529   action->priority = priority;
 530   lmm_update_variable_weight(cpu_im_maxmin_system,
 531                              ((surf_action_lmm_t) action)->variable,
 532                              priority);
 533
 534   if(update_mechanism == UM_FULL)
 535     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 536   XBT_OUT();
 537 }
 538
 539 #ifdef HAVE_TRACING
 540 static void cpu_im_action_set_category(surf_action_t action,
 541                                        const char *category)
 542 {
 543   XBT_IN("(%p,%s)", action, category);
 544   action->category = xbt_strdup (category);
 545   XBT_OUT();
 546 }
 547 #endif
 548
 549 static double cpu_im_action_get_remains(surf_action_t action)
 550 {
 551   XBT_IN("(%p)", action);
 552   /* update remains before return it */
 553   if(update_mechanism == UM_FULL)
 554     cpu_im_update_remains(ACTION_GET_CPU(action), surf_get_clock());
 555   return action->remains;
 556   XBT_OUT();
 557 }
 558
 559 static e_surf_resource_state_t cpu_im_get_state(void *cpu)
 560 {
 561   return ((cpu_Cas01_im_t) cpu)->state_current;
 562 }
 563
 564 static double cpu_im_get_speed(void *cpu, double load)
 565 {
 566   return load * (((cpu_Cas01_im_t) cpu)->power_peak);
 567 }
 568
 569 static double cpu_im_get_available_speed(void *cpu)
 570 {
 571   /* number between 0 and 1 */
 572   return ((cpu_Cas01_im_t) cpu)->power_scale;
 573 }
 574
 575 static void cpu_im_action_update_index_heap(void *action, int i)
 576 {
 577   ((surf_action_cpu_Cas01_im_t) action)->index_heap = i;
 578 }
 579
 580 static void cpu_im_finalize(void)
 581 {
 582   void **cpu;
 583   xbt_lib_cursor_t cursor;
 584   char *key;
 585
 586   xbt_lib_foreach(host_lib, cursor, key, cpu){
 587     if(cpu[SURF_CPU_LEVEL])
 588     {
 589         cpu_Cas01_im_t CPU = cpu[SURF_CPU_LEVEL];
 590         xbt_swag_free(CPU->action_set);
 591     }
 592   }
 593
 594   lmm_system_free(cpu_im_maxmin_system);
 595   cpu_im_maxmin_system = NULL;
 596
 597   surf_model_exit(surf_cpu_model);
 598   surf_cpu_model = NULL;
 599
 600   xbt_swag_free
 601       (cpu_im_running_action_set_that_does_not_need_being_checked);
 602   cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
 603   if(cpu_im_action_heap)  xbt_heap_free(cpu_im_action_heap);
 604   if(cpu_im_modified_cpu) xbt_swag_free(cpu_im_modified_cpu);
 605 }
 606
 607 static void surf_cpu_im_model_init_internal(const char* name)
 608 {
 609   s_surf_action_t action;
 610   s_cpu_Cas01_im_t cpu;
 611
 612   surf_cpu_model = surf_model_init();
 613
 614   cpu_im_running_action_set_that_does_not_need_being_checked =
 615       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 616
 617   surf_cpu_model->name = name;
 618
 619   surf_cpu_model->action_unref = cpu_im_action_unref;
 620   surf_cpu_model->action_cancel = cpu_im_action_cancel;
 621   surf_cpu_model->action_state_set = cpu_im_cpu_action_state_set;
 622
 623   surf_cpu_model->model_private->resource_used = cpu_im_resource_used;
 624   surf_cpu_model->model_private->share_resources = generic_share_resources;
 625   surf_cpu_model->model_private->update_actions_state =
 626       generic_update_actions_state;//ok
 627   surf_cpu_model->model_private->update_resource_state =
 628       cpu_im_update_resource_state;//ok
 629   surf_cpu_model->model_private->finalize = cpu_im_finalize;
 630
 631   surf_cpu_model->suspend = cpu_im_action_suspend;
 632   surf_cpu_model->resume = cpu_im_action_resume;
 633   surf_cpu_model->is_suspended = cpu_im_action_is_suspended;
 634   surf_cpu_model->set_max_duration = cpu_im_action_set_max_duration;
 635   surf_cpu_model->set_priority = cpu_im_action_set_priority;
 636 #ifdef HAVE_TRACING
 637   surf_cpu_model->set_category = cpu_im_action_set_category;
 638 #endif
 639   surf_cpu_model->get_remains = cpu_im_action_get_remains;
 640
 641   surf_cpu_model->extension.cpu.execute = cpu_im_execute;
 642   surf_cpu_model->extension.cpu.sleep = cpu_im_action_sleep;
 643
 644   surf_cpu_model->extension.cpu.get_state = cpu_im_get_state;
 645   surf_cpu_model->extension.cpu.get_speed = cpu_im_get_speed;
 646   surf_cpu_model->extension.cpu.get_available_speed =
 647       cpu_im_get_available_speed;
 648   surf_cpu_model->extension.cpu.create_resource = cpu_im_create_resource;
 649   surf_cpu_model->extension.cpu.add_traces = cpu_im_add_traces_cpu;
 650
 651   if (!cpu_im_maxmin_system) {
 652     sg_maxmin_selective_update = 1;
 653     cpu_im_maxmin_system = lmm_system_new();
 654   }
 655   if(update_mechanism == UM_FULL){
 656     cpu_im_action_heap = xbt_heap_new(8, NULL);
 657     xbt_heap_set_update_callback(cpu_im_action_heap,
 658                                  cpu_im_action_update_index_heap);
 659     cpu_im_modified_cpu =
 660         xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
 661   }
 662 }
 663
 664 /*********************************************************************/
 665 /* Basic sharing model for CPU: that is where all this started... ;) */
 666 /*********************************************************************/
 667 /* @InProceedings{casanova01simgrid, */
 668 /*   author =       "H. Casanova", */
 669 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 670 /*                  and the Grid (CCGrid'01)", */
 671 /*   publisher =    "IEEE Computer Society", */
 672 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 673 /*                  Scheduling", */
 674 /*   year =         "2001", */
 675 /*   month =        may, */
 676 /*   note =         "Available at */
 677 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 678 /* } */
 679
 680 void surf_cpu_model_init_Cas01_im()
 681 {
 682   char* name;
 683   if( strcmp(xbt_cfg_get_string(_surf_cfg_set, "cpu/model"),"Cas01"))
 684     update_mechanism = UM_FULL;
 685   else
 686     update_mechanism = UM_LAZY;
 687
 688   if (surf_cpu_model)
 689     return;
 690   surf_cpu_im_model_init_internal("CPU");
 691   cpu_im_define_callbacks();
 692   xbt_dynar_push(model_list, &surf_cpu_model);
 693 }
 694
 695 double generic_share_resources(double now)
 696 {
 697   surf_action_cpu_Cas01_im_t action;
 698   if(update_mechanism == UM_FULL)
 699     return cpu_im_share_resources(now);
 700   else if (update_mechanism == UM_LAZY)
 701   {
 702     return generic_maxmin_share_resources(surf_cpu_model->states.running_action_set,
 703         xbt_swag_offset(*action, generic_lmm_action.variable),
 704         cpu_im_maxmin_system, lmm_solve);
 705   } else {
 706     xbt_die("Invalide update mechanism!");
 707     return 0;
 708   }
 709 }
 710
 711 static void cpu_update_actions_state(double now, double delta)
 712 {
 713   surf_action_cpu_Cas01_im_t action = NULL;
 714   surf_action_cpu_Cas01_im_t next_action = NULL;
 715   xbt_swag_t running_actions = surf_cpu_model->states.running_action_set;
 716   xbt_swag_foreach_safe(action, next_action, running_actions) {
 717 #ifdef HAVE_TRACING
 718     if (TRACE_is_enabled()) {
 719       cpu_Cas01_im_t x =
 720         lmm_constraint_id(lmm_get_cnst_from_var
 721                           (cpu_maxmin_system, GENERIC_LMM_ACTION(action).variable, 0));
 722
 723       TRACE_surf_host_set_utilization(x->generic_resource.name,
 724                                       GENERIC_ACTION(action).data,
 725                                       (surf_action_t) action,
 726                                       lmm_variable_getvalue
 727                                       (GENERIC_LMM_ACTION(action).variable), now - delta,
 728                                       delta);
 729       TRACE_last_timestamp_to_dump = now-delta;
 730     }
 731 #endif
 732     double_update(&(GENERIC_ACTION(action).remains),
 733                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * delta);
 734     if (GENERIC_LMM_ACTION(action).generic_action.max_duration != NO_MAX_DURATION)
 735       double_update(&(GENERIC_ACTION(action).max_duration), delta);
 736     if ((GENERIC_ACTION(action).remains <= 0) &&
 737         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 738       GENERIC_ACTION(action).finish = surf_get_clock();
 739       cpu_im_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 740     } else if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION) &&
 741                (GENERIC_ACTION(action).max_duration <= 0)) {
 742       GENERIC_ACTION(action).finish = surf_get_clock();
 743       cpu_im_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 744     }
 745   }
 746
 747   return;
 748 }
 749
 750 void generic_update_actions_state(double now, double delta)
 751 {
 752   if(update_mechanism == UM_FULL)
 753     cpu_im_update_actions_state(now, delta);
 754   else if(update_mechanism == UM_LAZY)
 755   {
 756     cpu_update_actions_state(now, delta);
 757   }
 758   else
 759     xbt_die("Not recognized surf cpu model!");
 760 }