src/surf/cpu_im.c

   1 /*      $Id$     */
   2
   3 /* Copyright (c) 2004 Arnaud Legrand. All rights reserved.                  */
   4
   5 /* This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the license (GNU LGPL) which comes with this package. */
   7
   8 #include "surf_private.h"
   9
  10 #undef GENERIC_LMM_ACTION
  11 #undef GENERIC_ACTION
  12 #undef ACTION_GET_CPU
  13 #define GENERIC_LMM_ACTION(action) action->generic_lmm_action
  14 #define GENERIC_ACTION(action) GENERIC_LMM_ACTION(action).generic_action
  15 #define ACTION_GET_CPU(action) ((surf_action_cpu_Cas01_im_t) action)->cpu
  16
  17 typedef struct surf_action_cpu_cas01_im {
  18   s_surf_action_lmm_t generic_lmm_action;
  19   s_xbt_swag_hookup_t cpu_list_hookup;
  20   int index_heap;
  21   void *cpu;
  22 } s_surf_action_cpu_Cas01_im_t, *surf_action_cpu_Cas01_im_t;
  23
  24 typedef struct cpu_Cas01_im {
  25   s_surf_resource_t generic_resource;
  26   s_xbt_swag_hookup_t modified_cpu_hookup;
  27   double power_peak;
  28   double power_scale;
  29   tmgr_trace_event_t power_event;
  30   e_surf_resource_state_t state_current;
  31   tmgr_trace_event_t state_event;
  32   lmm_constraint_t constraint;
  33   xbt_swag_t action_set;
  34   double last_update;
  35 } s_cpu_Cas01_im_t, *cpu_Cas01_im_t;
  36
  37 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_im, surf,
  38                                 "Logging specific to the SURF CPU IMPROVED module");
  39
  40
  41 lmm_system_t cpu_im_maxmin_system = NULL;
  42 static xbt_swag_t cpu_im_modified_cpu = NULL;
  43 static xbt_heap_t cpu_im_action_heap = NULL;
  44 extern int sg_maxmin_selective_update;
  45
  46
  47 static xbt_swag_t cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
  48
  49 static cpu_Cas01_im_t cpu_im_new(char *name, double power_peak,
  50                               double power_scale,
  51                               tmgr_trace_t power_trace,
  52                               e_surf_resource_state_t state_initial,
  53                               tmgr_trace_t state_trace,
  54                               xbt_dict_t cpu_properties)
  55 {
  56   cpu_Cas01_im_t cpu = xbt_new0(s_cpu_Cas01_im_t, 1);
  57   s_surf_action_cpu_Cas01_im_t action;
  58   xbt_assert1(!surf_model_resource_by_name(surf_cpu_model, name),
  59               "Host '%s' declared several times in the platform file", name);
  60   cpu->generic_resource.model = surf_cpu_model;
  61   cpu->generic_resource.name = name;
  62   cpu->generic_resource.properties = cpu_properties;
  63   cpu->power_peak = power_peak;
  64   xbt_assert0(cpu->power_peak > 0, "Power has to be >0");
  65   cpu->power_scale = power_scale;
  66   if (power_trace)
  67     cpu->power_event =
  68       tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
  69
  70   cpu->state_current = state_initial;
  71   if (state_trace)
  72     cpu->state_event =
  73       tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
  74
  75   cpu->constraint =
  76     lmm_constraint_new(cpu_im_maxmin_system, cpu,
  77                        cpu->power_scale * cpu->power_peak);
  78
  79   xbt_dict_set(surf_model_resource_set(surf_cpu_model), name, cpu,
  80                surf_resource_free);
  81   cpu->action_set = xbt_swag_new(xbt_swag_offset(action, cpu_list_hookup));
  82
  83   return cpu;
  84 }
  85
  86
  87 static void parse_cpu_im_init(void)
  88 {
  89   double power_peak = 0.0;
  90   double power_scale = 0.0;
  91   tmgr_trace_t power_trace = NULL;
  92   e_surf_resource_state_t state_initial = SURF_RESOURCE_OFF;
  93   tmgr_trace_t state_trace = NULL;
  94
  95   power_peak = get_cpu_power(A_surfxml_host_power);
  96   surf_parse_get_double(&power_scale, A_surfxml_host_availability);
  97   power_trace = tmgr_trace_new(A_surfxml_host_availability_file);
  98
  99   xbt_assert0((A_surfxml_host_state == A_surfxml_host_state_ON) ||
 100               (A_surfxml_host_state == A_surfxml_host_state_OFF),
 101               "Invalid state");
 102   if (A_surfxml_host_state == A_surfxml_host_state_ON)
 103     state_initial = SURF_RESOURCE_ON;
 104   if (A_surfxml_host_state == A_surfxml_host_state_OFF)
 105     state_initial = SURF_RESOURCE_OFF;
 106   state_trace = tmgr_trace_new(A_surfxml_host_state_file);
 107
 108   current_property_set = xbt_dict_new();
 109   cpu_im_new(xbt_strdup(A_surfxml_host_id), power_peak, power_scale,
 110           power_trace, state_initial, state_trace, current_property_set);
 111
 112 }
 113
 114 static void cpu_im_add_traces_cpu(void)
 115 {
 116   xbt_dict_cursor_t cursor = NULL;
 117   char *trace_name, *elm;
 118
 119   static int called = 0;
 120
 121   if (called)
 122     return;
 123   called = 1;
 124
 125
 126   /* connect all traces relative to hosts */
 127   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 128     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 129     cpu_Cas01_im_t host = surf_model_resource_by_name(surf_cpu_model, elm);
 130
 131     xbt_assert1(host, "Host %s undefined", elm);
 132     xbt_assert1(trace, "Trace %s undefined", trace_name);
 133
 134     host->state_event = tmgr_history_add_trace(history, trace, 0.0, 0, host);
 135   }
 136
 137   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 138     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 139     cpu_Cas01_im_t host = surf_model_resource_by_name(surf_cpu_model, elm);
 140
 141     xbt_assert1(host, "Host %s undefined", elm);
 142     xbt_assert1(trace, "Trace %s undefined", trace_name);
 143
 144     host->power_event = tmgr_history_add_trace(history, trace, 0.0, 0, host);
 145   }
 146 }
 147
 148 static void cpu_im_define_callbacks(const char *file)
 149 {
 150   surf_parse_reset_parser();
 151   surfxml_add_callback(STag_surfxml_host_cb_list, parse_cpu_im_init);
 152   surfxml_add_callback(ETag_surfxml_platform_cb_list, &cpu_im_add_traces_cpu);
 153 }
 154
 155 static int cpu_im_resource_used(void *resource_id)
 156 {
 157   return lmm_constraint_used(cpu_im_maxmin_system,
 158                              ((cpu_Cas01_im_t) resource_id)->constraint);
 159 }
 160
 161 static int cpu_im_action_unref(surf_action_t action)
 162 {
 163   action->refcount--;
 164   if (!action->refcount) {
 165     xbt_swag_remove(action, action->state_set);
 166     if (((surf_action_lmm_t) action)->variable)
 167       lmm_variable_free(cpu_im_maxmin_system,
 168                         ((surf_action_lmm_t) action)->variable);
 169     /* remove from heap */
 170     xbt_heap_remove(cpu_im_action_heap,
 171                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 172     xbt_swag_remove(action,
 173                     ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 174     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 175     free(action);
 176     return 1;
 177   }
 178   return 0;
 179 }
 180
 181 static void cpu_im_action_cancel(surf_action_t action)
 182 {
 183   surf_action_state_set(action, SURF_ACTION_FAILED);
 184   xbt_heap_remove(cpu_im_action_heap,
 185                   ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 186   xbt_swag_remove(action,
 187                   ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 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       DEBUG2("Update action(%p) remains %lf", action,
 225              GENERIC_ACTION(action).remains);
 226     }
 227   }
 228   cpu->last_update = now;
 229 }
 230
 231 static double cpu_im_share_resources(double now)
 232 {
 233   surf_action_cpu_Cas01_im_t action;
 234   double min;
 235   double value;
 236   cpu_Cas01_im_t cpu, cpu_next;
 237
 238   xbt_swag_foreach(cpu, cpu_im_modified_cpu)
 239     cpu_im_update_remains(cpu, now);
 240
 241   lmm_solve(cpu_im_maxmin_system);
 242
 243   xbt_swag_foreach_safe(cpu, cpu_next, cpu_im_modified_cpu) {
 244     xbt_swag_foreach(action, cpu->action_set) {
 245       if (GENERIC_ACTION(action).state_set !=
 246           surf_cpu_model->states.running_action_set)
 247         continue;
 248
 249       /* bogus priority, skip it */
 250       if (GENERIC_ACTION(action).priority <= 0)
 251         continue;
 252
 253       min = -1;
 254       value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 255       if (value > 0) {
 256         if (GENERIC_ACTION(action).remains > 0)
 257           value = GENERIC_ACTION(action).remains / value;
 258         else
 259           value = 0.0;
 260       }
 261       if (value > 0)
 262         min = now + value;
 263
 264       if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 265           && (min == -1
 266               || GENERIC_ACTION(action).start +
 267               GENERIC_ACTION(action).max_duration < min))
 268         min =
 269           GENERIC_ACTION(action).start + GENERIC_ACTION(action).max_duration;
 270
 271       DEBUG4("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 272              GENERIC_ACTION(action).start, now + value,
 273              GENERIC_ACTION(action).max_duration);
 274
 275       if (action->index_heap >= 0) {
 276         surf_action_cpu_Cas01_im_t heap_act =
 277           xbt_heap_remove(cpu_im_action_heap, action->index_heap);
 278         if (heap_act != action)
 279           DIE_IMPOSSIBLE;
 280       }
 281       if (min != -1) {
 282         xbt_heap_push(cpu_im_action_heap, action, min);
 283         DEBUG2("Insert at heap action(%p) min %lf", action, min);
 284       }
 285     }
 286     xbt_swag_remove(cpu, cpu_im_modified_cpu);
 287   }
 288   return xbt_heap_size(cpu_im_action_heap) >
 289     0 ? xbt_heap_maxkey(cpu_im_action_heap) - now : -1;
 290 }
 291
 292 static void cpu_im_update_actions_state(double now, double delta)
 293 {
 294   surf_action_cpu_Cas01_im_t action;
 295
 296   while ((xbt_heap_size(cpu_im_action_heap) > 0)
 297          && (double_equals(xbt_heap_maxkey(cpu_im_action_heap), now))) {
 298     action = xbt_heap_pop(cpu_im_action_heap);
 299     DEBUG1("Action %p: finish", action);
 300     GENERIC_ACTION(action).finish = surf_get_clock();
 301     /* set the remains to 0 due to precision problems when updating the remaining amount */
 302     GENERIC_ACTION(action).remains = 0;
 303     cpu_im_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 304     cpu_im_update_remains(action->cpu, surf_get_clock());
 305   }
 306   return;
 307 }
 308
 309 static void cpu_im_update_resource_state(void *id,
 310                                   tmgr_trace_event_t event_type,
 311                                   double value, double date)
 312 {
 313   cpu_Cas01_im_t cpu = id;
 314
 315   if (event_type == cpu->power_event) {
 316     cpu->power_scale = value;
 317     lmm_update_constraint_bound(cpu_im_maxmin_system, cpu->constraint,
 318                                 cpu->power_scale * cpu->power_peak);
 319     xbt_swag_insert(cpu, cpu_im_modified_cpu);
 320     if (tmgr_trace_event_free(event_type))
 321       cpu->power_event = NULL;
 322   } else if (event_type == cpu->state_event) {
 323     if (value > 0)
 324       cpu->state_current = SURF_RESOURCE_ON;
 325     else {
 326       lmm_constraint_t cnst = cpu->constraint;
 327       lmm_variable_t var = NULL;
 328       lmm_element_t elem = NULL;
 329
 330       cpu->state_current = SURF_RESOURCE_OFF;
 331
 332       while ((var = lmm_get_var_from_cnst(cpu_im_maxmin_system, cnst, &elem))) {
 333         surf_action_t action = lmm_variable_id(var);
 334
 335         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 336             surf_action_state_get(action) == SURF_ACTION_READY ||
 337             surf_action_state_get(action) == SURF_ACTION_NOT_IN_THE_SYSTEM) {
 338           action->finish = date;
 339           cpu_im_cpu_action_state_set(action, SURF_ACTION_FAILED);
 340         }
 341       }
 342     }
 343     if (tmgr_trace_event_free(event_type))
 344       cpu->state_event = NULL;
 345   } else {
 346     CRITICAL0("Unknown event ! \n");
 347     xbt_abort();
 348   }
 349
 350   return;
 351 }
 352
 353 static surf_action_t cpu_im_execute(void *cpu, double size)
 354 {
 355   surf_action_cpu_Cas01_im_t action = NULL;
 356   cpu_Cas01_im_t CPU = cpu;
 357
 358   XBT_IN2("(%s,%g)", surf_resource_name(CPU), size);
 359   action =
 360     surf_action_new(sizeof(s_surf_action_cpu_Cas01_im_t), size,
 361                     surf_cpu_model, CPU->state_current != SURF_RESOURCE_ON);
 362
 363   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 364                                                    calloc but it seems to help valgrind... */
 365
 366   GENERIC_LMM_ACTION(action).variable =
 367     lmm_variable_new(cpu_im_maxmin_system, action,
 368                      GENERIC_ACTION(action).priority, -1.0, 1);
 369   action->index_heap = -1;
 370   action->cpu = CPU;
 371   xbt_swag_insert(CPU, cpu_im_modified_cpu);
 372   xbt_swag_insert(action, CPU->action_set);
 373   lmm_expand(cpu_im_maxmin_system, CPU->constraint,
 374              GENERIC_LMM_ACTION(action).variable, 1.0);
 375   XBT_OUT;
 376   return (surf_action_t) action;
 377 }
 378
 379 static surf_action_t cpu_im_action_sleep(void *cpu, double duration)
 380 {
 381   surf_action_cpu_Cas01_im_t action = NULL;
 382
 383   if (duration > 0)
 384     duration = MAX(duration, MAXMIN_PRECISION);
 385
 386   XBT_IN2("(%s,%g)", surf_resource_name(cpu), duration);
 387   action = (surf_action_cpu_Cas01_im_t) cpu_im_execute(cpu, 1.0);
 388   GENERIC_ACTION(action).max_duration = duration;
 389   GENERIC_LMM_ACTION(action).suspended = 2;
 390   if (duration == NO_MAX_DURATION) {
 391     /* Move to the *end* of the corresponding action set. This convention
 392        is used to speed up update_resource_state  */
 393     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 394     ((surf_action_t) action)->state_set =
 395       cpu_im_running_action_set_that_does_not_need_being_checked;
 396     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 397   }
 398
 399   lmm_update_variable_weight(cpu_im_maxmin_system,
 400                              GENERIC_LMM_ACTION(action).variable, 0.0);
 401   xbt_swag_insert(cpu, cpu_im_modified_cpu);
 402   XBT_OUT;
 403   return (surf_action_t) action;
 404 }
 405
 406 static void cpu_im_action_suspend(surf_action_t action)
 407 {
 408   XBT_IN1("(%p)", action);
 409   if (((surf_action_lmm_t) action)->suspended != 2) {
 410     lmm_update_variable_weight(cpu_im_maxmin_system,
 411                                ((surf_action_lmm_t) action)->variable, 0.0);
 412     ((surf_action_lmm_t) action)->suspended = 1;
 413     xbt_heap_remove(cpu_im_action_heap,
 414                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 415     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 416   }
 417   XBT_OUT;
 418 }
 419
 420 static void cpu_im_action_resume(surf_action_t action)
 421 {
 422   XBT_IN1("(%p)", action);
 423   if (((surf_action_lmm_t) action)->suspended != 2) {
 424     lmm_update_variable_weight(cpu_im_maxmin_system,
 425                                ((surf_action_lmm_t) action)->variable,
 426                                action->priority);
 427     ((surf_action_lmm_t) action)->suspended = 0;
 428     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 429   }
 430   XBT_OUT;
 431 }
 432
 433 static int cpu_im_action_is_suspended(surf_action_t action)
 434 {
 435   return (((surf_action_lmm_t) action)->suspended == 1);
 436 }
 437
 438 static void cpu_im_action_set_max_duration(surf_action_t action, double duration)
 439 {
 440   XBT_IN2("(%p,%g)", action, duration);
 441
 442   action->max_duration = duration;
 443   /* insert cpu in modified_cpu set to notice the max duration change */
 444   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 445   XBT_OUT;
 446 }
 447
 448 static void cpu_im_action_set_priority(surf_action_t action, double priority)
 449 {
 450   XBT_IN2("(%p,%g)", action, priority);
 451   action->priority = priority;
 452   lmm_update_variable_weight(cpu_im_maxmin_system,
 453                              ((surf_action_lmm_t) action)->variable,
 454                              priority);
 455
 456   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 457   XBT_OUT;
 458 }
 459
 460 static double cpu_im_action_get_remains(surf_action_t action)
 461 {
 462   XBT_IN1("(%p)", action);
 463   /* update remains before return it */
 464   cpu_im_update_remains(ACTION_GET_CPU(action), surf_get_clock());
 465   return action->remains;
 466   XBT_OUT;
 467 }
 468
 469 static e_surf_resource_state_t cpu_im_get_state(void *cpu)
 470 {
 471   return ((cpu_Cas01_im_t) cpu)->state_current;
 472 }
 473
 474 static double cpu_im_get_speed(void *cpu, double load)
 475 {
 476   return load * (((cpu_Cas01_im_t) cpu)->power_peak);
 477 }
 478
 479 static double cpu_im_get_available_speed(void *cpu)
 480 {
 481   /* number between 0 and 1 */
 482   return ((cpu_Cas01_im_t) cpu)->power_scale;
 483 }
 484
 485 static void cpu_im_action_update_index_heap(void *action, int i)
 486 {
 487   ((surf_action_cpu_Cas01_im_t) action)->index_heap = i;
 488 }
 489
 490 static void cpu_im_finalize(void)
 491 {
 492   void *cpu;
 493   xbt_dict_cursor_t cursor;
 494   char *key;
 495   xbt_dict_foreach(surf_model_resource_set(surf_cpu_model), cursor, key, cpu) {
 496     cpu_Cas01_im_t CPU = cpu;
 497     xbt_swag_free(CPU->action_set);
 498   }
 499
 500   lmm_system_free(cpu_im_maxmin_system);
 501   cpu_im_maxmin_system = NULL;
 502
 503   surf_model_exit(surf_cpu_model);
 504   surf_cpu_model = NULL;
 505
 506   xbt_swag_free(cpu_im_running_action_set_that_does_not_need_being_checked);
 507   cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
 508   xbt_heap_free(cpu_im_action_heap);
 509   xbt_swag_free(cpu_im_modified_cpu);
 510 }
 511
 512 static void surf_cpu_im_model_init_internal(void)
 513 {
 514   s_surf_action_t action;
 515   s_cpu_Cas01_im_t cpu;
 516
 517   surf_cpu_model = surf_model_init();
 518
 519   cpu_im_running_action_set_that_does_not_need_being_checked =
 520     xbt_swag_new(xbt_swag_offset(action, state_hookup));
 521
 522   surf_cpu_model->name = "CPU_IM";
 523
 524   surf_cpu_model->action_unref = cpu_im_action_unref;
 525   surf_cpu_model->action_cancel = cpu_im_action_cancel;
 526   surf_cpu_model->action_state_set = cpu_im_cpu_action_state_set;
 527
 528   surf_cpu_model->model_private->resource_used = cpu_im_resource_used;
 529   surf_cpu_model->model_private->share_resources = cpu_im_share_resources;
 530   surf_cpu_model->model_private->update_actions_state = cpu_im_update_actions_state;
 531   surf_cpu_model->model_private->update_resource_state =
 532     cpu_im_update_resource_state;
 533   surf_cpu_model->model_private->finalize = cpu_im_finalize;
 534
 535   surf_cpu_model->suspend = cpu_im_action_suspend;
 536   surf_cpu_model->resume = cpu_im_action_resume;
 537   surf_cpu_model->is_suspended = cpu_im_action_is_suspended;
 538   surf_cpu_model->set_max_duration = cpu_im_action_set_max_duration;
 539   surf_cpu_model->set_priority = cpu_im_action_set_priority;
 540   surf_cpu_model->get_remains = cpu_im_action_get_remains;
 541
 542   surf_cpu_model->extension.cpu.execute = cpu_im_execute;
 543   surf_cpu_model->extension.cpu.sleep = cpu_im_action_sleep;
 544
 545   surf_cpu_model->extension.cpu.get_state = cpu_im_get_state;
 546   surf_cpu_model->extension.cpu.get_speed = cpu_im_get_speed;
 547   surf_cpu_model->extension.cpu.get_available_speed = cpu_im_get_available_speed;
 548
 549   if (!cpu_im_maxmin_system) {
 550     sg_maxmin_selective_update = 1;
 551     cpu_im_maxmin_system = lmm_system_new();
 552   }
 553   cpu_im_action_heap = xbt_heap_new(8, NULL);
 554   xbt_heap_set_update_callback(cpu_im_action_heap, cpu_im_action_update_index_heap);
 555   cpu_im_modified_cpu = xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
 556 }
 557
 558 /*********************************************************************/
 559 /* Basic sharing model for CPU: that is where all this started... ;) */
 560 /*********************************************************************/
 561 /* @InProceedings{casanova01simgrid, */
 562 /*   author =       "H. Casanova", */
 563 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 564 /*                  and the Grid (CCGrid'01)", */
 565 /*   publisher =    "IEEE Computer Society", */
 566 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 567 /*                  Scheduling", */
 568 /*   year =         "2001", */
 569 /*   month =        may, */
 570 /*   note =         "Available at */
 571 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 572 /* } */
 573 void surf_cpu_model_init_Cas01_im(const char *filename)
 574 {
 575   if (surf_cpu_model)
 576     return;
 577   surf_cpu_im_model_init_internal();
 578   cpu_im_define_callbacks(filename);
 579   xbt_dynar_push(model_list, &surf_cpu_model);
 580 }