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