src/surf/cpu_ti.c

   1
   2 /* Copyright (c) 2009, 2010. The SimGrid Team.
   3  * 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 /*
   9         commit: e2d6799c4182f00443b3013aadb1c2412372460f
  10         This commit retrieves the old implementation of CPU_TI with multi-levels.
  11 */
  12
  13 #include "surf_private.h"
  14 #include "trace_mgr_private.h"
  15 #include "cpu_ti_private.h"
  16 #include "xbt/heap.h"
  17
  18 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_ti, surf,
  19                                 "Logging specific to the SURF CPU TRACE INTEGRATION module");
  20
  21
  22 static xbt_swag_t
  23     cpu_ti_running_action_set_that_does_not_need_being_checked = NULL;
  24 static xbt_swag_t cpu_ti_modified_cpu = NULL;
  25 static xbt_heap_t cpu_ti_action_heap;
  26
  27 /* prototypes of new trace functions */
  28 static double surf_cpu_ti_integrate_trace(surf_cpu_ti_tgmr_t trace,
  29                                           double a, double b);
  30
  31
  32 static double surf_cpu_ti_solve_trace(surf_cpu_ti_tgmr_t trace, double a,
  33                                       double amount);
  34 static double surf_cpu_ti_solve_trace_somewhat_simple(surf_cpu_ti_tgmr_t
  35                                                       trace, double a,
  36                                                       double amount);
  37
  38 static void surf_cpu_ti_free_tmgr(surf_cpu_ti_tgmr_t trace);
  39
  40 static double surf_cpu_ti_integrate_trace_simple(surf_cpu_ti_trace_t trace,
  41                                                  double a, double b);
  42 static double surf_cpu_ti_integrate_trace_simple_point(surf_cpu_ti_trace_t
  43                                                        trace, double a);
  44 static double surf_cpu_ti_solve_trace_simple(surf_cpu_ti_trace_t trace,
  45                                              double a, double amount);
  46 static int surf_cpu_ti_binary_search(double *array, double a, int low,
  47                                      int high);
  48 /* end prototypes */
  49
  50 static void surf_cpu_ti_free_trace(surf_cpu_ti_trace_t trace)
  51 {
  52   if (trace->time_points)
  53     xbt_free(trace->time_points);
  54   if (trace->integral)
  55     xbt_free(trace->integral);
  56   xbt_free(trace);
  57 }
  58
  59 static void surf_cpu_ti_free_tmgr(surf_cpu_ti_tgmr_t trace)
  60 {
  61   if (trace->trace)
  62     surf_cpu_ti_free_trace(trace->trace);
  63   xbt_free(trace);
  64 }
  65
  66 static surf_cpu_ti_trace_t surf_cpu_ti_trace_new(tmgr_trace_t power_trace)
  67 {
  68   surf_cpu_ti_trace_t trace;
  69   s_tmgr_event_t val;
  70   unsigned int cpt;
  71   double integral = 0;
  72   double time = 0;
  73   int i = 0;
  74   trace = xbt_new0(s_surf_cpu_ti_trace_t, 1);
  75   trace->time_points =
  76       xbt_malloc0(sizeof(double) *
  77                   (xbt_dynar_length(power_trace->event_list) + 1));
  78   trace->integral =
  79       xbt_malloc0(sizeof(double) *
  80                   (xbt_dynar_length(power_trace->event_list) + 1));
  81   trace->nb_points = xbt_dynar_length(power_trace->event_list);
  82   xbt_dynar_foreach(power_trace->event_list, cpt, val) {
  83     trace->time_points[i] = time;
  84     trace->integral[i] = integral;
  85     integral += val.delta * val.value;
  86     time += val.delta;
  87     i++;
  88   }
  89   trace->time_points[i] = time;
  90   trace->integral[i] = integral;
  91   return trace;
  92 }
  93
  94 /**
  95 * \brief Creates a new integration trace from a tmgr_trace_t
  96 *
  97 * \param        power_trace             CPU availability trace
  98 * \param        value                                   Percentage of CPU power available (useful to fixed tracing)
  99 * \param        spacing                         Initial spacing
 100 * \return       Integration trace structure
 101 */
 102 static surf_cpu_ti_tgmr_t cpu_ti_parse_trace(tmgr_trace_t power_trace,
 103                                              double value)
 104 {
 105   surf_cpu_ti_tgmr_t trace;
 106   double total_time = 0.0;
 107   s_tmgr_event_t val;
 108   unsigned int cpt;
 109   trace = xbt_new0(s_surf_cpu_ti_tgmr_t, 1);
 110
 111 /* no availability file, fixed trace */
 112   if (!power_trace) {
 113     trace->type = TRACE_FIXED;
 114     trace->value = value;
 115     XBT_DEBUG("No availabily trace. Constant value = %lf", value);
 116     return trace;
 117   }
 118
 119   /* only one point available, fixed trace */
 120   if (xbt_dynar_length(power_trace->event_list) == 1) {
 121     xbt_dynar_get_cpy(power_trace->event_list, 0, &val);
 122     trace->type = TRACE_FIXED;
 123     trace->value = val.value;
 124     return trace;
 125   }
 126
 127   trace->type = TRACE_DYNAMIC;
 128   trace->power_trace = power_trace;
 129
 130   /* count the total time of trace file */
 131   xbt_dynar_foreach(power_trace->event_list, cpt, val) {
 132     total_time += val.delta;
 133   }
 134   trace->trace = surf_cpu_ti_trace_new(power_trace);
 135   trace->last_time = total_time;
 136   trace->total =
 137       surf_cpu_ti_integrate_trace_simple(trace->trace, 0, total_time);
 138
 139   XBT_DEBUG("Total integral %lf, last_time %lf ",
 140          trace->total, trace->last_time);
 141
 142   return trace;
 143 }
 144
 145
 146 static void* cpu_ti_create_resource(char *name, double power_peak,
 147                            double power_scale,
 148                            tmgr_trace_t power_trace,
 149                            int core,
 150                            e_surf_resource_state_t state_initial,
 151                            tmgr_trace_t state_trace,
 152                            xbt_dict_t cpu_properties)
 153 {
 154   tmgr_trace_t empty_trace;
 155   s_tmgr_event_t val;
 156   cpu_ti_t cpu = xbt_new0(s_cpu_ti_t, 1);
 157   s_surf_action_cpu_ti_t ti_action;
 158   xbt_assert(core==1,"Multi-core not handled with this model yet");
 159   xbt_assert(!surf_cpu_resource_by_name(name),
 160               "Host '%s' declared several times in the platform file",
 161               name);
 162   xbt_assert(core==1,"Multi-core not handled with this model yet");
 163   cpu->action_set =
 164       xbt_swag_new(xbt_swag_offset(ti_action, cpu_list_hookup));
 165   cpu->generic_resource.model = surf_cpu_model;
 166   cpu->generic_resource.name = name;
 167   cpu->generic_resource.properties = cpu_properties;
 168   cpu->power_peak = power_peak;
 169   xbt_assert(cpu->power_peak > 0, "Power has to be >0");
 170   XBT_DEBUG("power scale %lf", power_scale);
 171   cpu->power_scale = power_scale;
 172   cpu->avail_trace = cpu_ti_parse_trace(power_trace, power_scale);
 173   cpu->state_current = state_initial;
 174   if (state_trace)
 175     cpu->state_event =
 176         tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
 177   if (power_trace && xbt_dynar_length(power_trace->event_list) > 1) {
 178     /* add a fake trace event if periodicity == 0 */
 179     xbt_dynar_get_cpy(power_trace->event_list,
 180                       xbt_dynar_length(power_trace->event_list) - 1, &val);
 181     if (val.delta == 0) {
 182       empty_trace = tmgr_empty_trace_new();
 183       cpu->power_event =
 184           tmgr_history_add_trace(history, empty_trace,
 185                                  cpu->avail_trace->last_time, 0, cpu);
 186     }
 187   }
 188   xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, cpu);
 189
 190   return cpu;
 191 }
 192
 193
 194 static void parse_cpu_ti_init(void)
 195 {
 196   cpu_ti_create_resource(struct_host->V_host_id,
 197                           struct_host->V_host_power_peak,
 198                           struct_host->V_host_power_scale,
 199                           struct_host->V_host_power_trace,
 200                           struct_host->V_host_core,
 201                           struct_host->V_host_state_initial,
 202                           struct_host->V_host_state_trace,
 203                           current_property_set);
 204   current_property_set = NULL;
 205
 206 }
 207
 208 static void add_traces_cpu_ti(void)
 209 {
 210   xbt_dict_cursor_t cursor = NULL;
 211   char *trace_name, *elm;
 212
 213   static int called = 0;
 214
 215   if (called)
 216     return;
 217   called = 1;
 218
 219 /* connect all traces relative to hosts */
 220   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 221     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 222     cpu_ti_t cpu = surf_cpu_resource_by_name(elm);
 223
 224     xbt_assert(cpu, "Host %s undefined", elm);
 225     xbt_assert(trace, "Trace %s undefined", trace_name);
 226
 227     if (cpu->state_event) {
 228       XBT_DEBUG("Trace already configured for this CPU(%s), ignoring it",
 229              elm);
 230       continue;
 231     }
 232     XBT_DEBUG("Add state trace: %s to CPU(%s)", trace_name, elm);
 233     cpu->state_event = tmgr_history_add_trace(history, trace, 0.0, 0, cpu);
 234   }
 235
 236   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 237     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 238     cpu_ti_t cpu = surf_cpu_resource_by_name(elm);
 239
 240     xbt_assert(cpu, "Host %s undefined", elm);
 241     xbt_assert(trace, "Trace %s undefined", trace_name);
 242
 243     XBT_DEBUG("Add power trace: %s to CPU(%s)", trace_name, elm);
 244     if (cpu->avail_trace)
 245       surf_cpu_ti_free_tmgr(cpu->avail_trace);
 246
 247     cpu->avail_trace = cpu_ti_parse_trace(trace, cpu->power_scale);
 248
 249     /* add a fake trace event if periodicity == 0 */
 250     if (trace && xbt_dynar_length(trace->event_list) > 1) {
 251       s_tmgr_event_t val;
 252       xbt_dynar_get_cpy(trace->event_list,
 253                         xbt_dynar_length(trace->event_list) - 1, &val);
 254       if (val.delta == 0) {
 255         tmgr_trace_t empty_trace;
 256         empty_trace = tmgr_empty_trace_new();
 257         cpu->power_event =
 258             tmgr_history_add_trace(history, empty_trace,
 259                                    cpu->avail_trace->last_time, 0, cpu);
 260       }
 261     }
 262   }
 263 }
 264
 265 static void cpu_ti_define_callbacks()
 266 {
 267   surfxml_add_callback(ETag_surfxml_host_cb_list, parse_cpu_ti_init);
 268   surfxml_add_callback(ETag_surfxml_platform_cb_list, &add_traces_cpu_ti);
 269 }
 270
 271 static int cpu_ti_resource_used(void *resource_id)
 272 {
 273   cpu_ti_t cpu = resource_id;
 274   return xbt_swag_size(cpu->action_set);
 275 }
 276
 277 static int cpu_ti_action_unref(surf_action_t action)
 278 {
 279   action->refcount--;
 280   if (!action->refcount) {
 281     xbt_swag_remove(action, action->state_set);
 282     /* remove from action_set */
 283     xbt_swag_remove(action, ACTION_GET_CPU(action)->action_set);
 284     /* remove from heap */
 285     xbt_heap_remove(cpu_ti_action_heap,
 286                     ((surf_action_cpu_ti_t) action)->index_heap);
 287     xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
 288     surf_action_free(&action);
 289     return 1;
 290   }
 291   return 0;
 292 }
 293
 294 static void cpu_ti_action_cancel(surf_action_t action)
 295 {
 296   surf_action_state_set(action, SURF_ACTION_FAILED);
 297   xbt_heap_remove(cpu_ti_action_heap,
 298                   ((surf_action_cpu_ti_t) action)->index_heap);
 299   xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
 300   return;
 301 }
 302
 303 static void cpu_ti_action_state_set(surf_action_t action,
 304                                     e_surf_action_state_t state)
 305 {
 306   surf_action_state_set(action, state);
 307   xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
 308   return;
 309 }
 310
 311 /**
 312 * \brief Update the remaining amount of actions
 313 *
 314 * \param        cpu             Cpu on which the actions are running
 315 * \param        now             Current time
 316 */
 317 static void cpu_ti_update_remaining_amount(cpu_ti_t cpu, double now)
 318 {
 319 #define GENERIC_ACTION(action) action->generic_action
 320   double area_total;
 321   surf_action_cpu_ti_t action;
 322
 323 /* already updated */
 324   if (cpu->last_update >= now)
 325     return;
 326
 327 /* calcule the surface */
 328   area_total =
 329       surf_cpu_ti_integrate_trace(cpu->avail_trace, cpu->last_update,
 330                                   now) * cpu->power_peak;
 331   XBT_DEBUG("Flops total: %lf, Last update %lf", area_total,
 332          cpu->last_update);
 333
 334   xbt_swag_foreach(action, cpu->action_set) {
 335     /* action not running, skip it */
 336     if (GENERIC_ACTION(action).state_set !=
 337         surf_cpu_model->states.running_action_set)
 338       continue;
 339
 340     /* bogus priority, skip it */
 341     if (GENERIC_ACTION(action).priority <= 0)
 342       continue;
 343
 344     /* action suspended, skip it */
 345     if (action->suspended != 0)
 346       continue;
 347
 348     /* action don't need update */
 349     if (GENERIC_ACTION(action).start >= now)
 350       continue;
 351
 352     /* skip action that are finishing now */
 353     if (GENERIC_ACTION(action).finish >= 0
 354         && GENERIC_ACTION(action).finish <= now)
 355       continue;
 356
 357     /* update remaining */
 358     double_update(&(GENERIC_ACTION(action).remains),
 359                   area_total / (cpu->sum_priority *
 360                                 GENERIC_ACTION(action).priority));
 361     XBT_DEBUG("Update remaining action(%p) remaining %lf", action,
 362            GENERIC_ACTION(action).remains);
 363   }
 364   cpu->last_update = now;
 365 #undef GENERIC_ACTION
 366 }
 367
 368 /**
 369 * \brief Update the finish date of action if necessary
 370 *
 371 * \param        cpu             Cpu on which the actions are running
 372 * \param        now             Current time
 373 */
 374 static void cpu_ti_update_action_finish_date(cpu_ti_t cpu, double now)
 375 {
 376 #define GENERIC_ACTION(action) action->generic_action
 377   surf_action_cpu_ti_t action;
 378   double sum_priority = 0.0, total_area, min_finish = -1;
 379
 380 /* update remaning amount of actions */
 381   cpu_ti_update_remaining_amount(cpu, now);
 382
 383   xbt_swag_foreach(action, cpu->action_set) {
 384     /* action not running, skip it */
 385     if (GENERIC_ACTION(action).state_set !=
 386         surf_cpu_model->states.running_action_set)
 387       continue;
 388
 389     /* bogus priority, skip it */
 390     if (GENERIC_ACTION(action).priority <= 0)
 391       continue;
 392
 393     /* action suspended, skip it */
 394     if (action->suspended != 0)
 395       continue;
 396
 397     sum_priority += 1.0 / GENERIC_ACTION(action).priority;
 398   }
 399   cpu->sum_priority = sum_priority;
 400
 401   xbt_swag_foreach(action, cpu->action_set) {
 402     min_finish = -1;
 403     /* action not running, skip it */
 404     if (GENERIC_ACTION(action).state_set !=
 405         surf_cpu_model->states.running_action_set)
 406       continue;
 407
 408     /* verify if the action is really running on cpu */
 409     if (action->suspended == 0 && GENERIC_ACTION(action).priority > 0) {
 410       /* total area needed to finish the action. Used in trace integration */
 411       total_area =
 412           (GENERIC_ACTION(action).remains) * sum_priority *
 413           GENERIC_ACTION(action).priority;
 414
 415       total_area /= cpu->power_peak;
 416
 417       GENERIC_ACTION(action).finish =
 418           surf_cpu_ti_solve_trace(cpu->avail_trace, now, total_area);
 419       /* verify which event will happen before (max_duration or finish time) */
 420       if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION) &&
 421           (GENERIC_ACTION(action).start +
 422            GENERIC_ACTION(action).max_duration <
 423            GENERIC_ACTION(action).finish))
 424         min_finish = GENERIC_ACTION(action).start +
 425             GENERIC_ACTION(action).max_duration;
 426       else
 427         min_finish = GENERIC_ACTION(action).finish;
 428     } else {
 429       /* put the max duration time on heap */
 430       if (GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 431         min_finish =
 432             (GENERIC_ACTION(action).start +
 433              GENERIC_ACTION(action).max_duration);
 434     }
 435     /* add in action heap */
 436     XBT_DEBUG("action(%p) index %d", action, action->index_heap);
 437     if (action->index_heap >= 0) {
 438       surf_action_cpu_ti_t heap_act =
 439           xbt_heap_remove(cpu_ti_action_heap, action->index_heap);
 440       if (heap_act != action)
 441         DIE_IMPOSSIBLE;
 442     }
 443     if (min_finish != NO_MAX_DURATION)
 444       xbt_heap_push(cpu_ti_action_heap, action, min_finish);
 445
 446     XBT_DEBUG
 447         ("Update finish time: Cpu(%s) Action: %p, Start Time: %lf Finish Time: %lf Max duration %lf",
 448          cpu->generic_resource.name, action, GENERIC_ACTION(action).start,
 449          GENERIC_ACTION(action).finish,
 450          GENERIC_ACTION(action).max_duration);
 451   }
 452 /* remove from modified cpu */
 453   xbt_swag_remove(cpu, cpu_ti_modified_cpu);
 454 #undef GENERIC_ACTION
 455 }
 456
 457 static double cpu_ti_share_resources(double now)
 458 {
 459   cpu_ti_t cpu, cpu_next;
 460   double min_action_duration = -1;
 461
 462 /* iterates over modified cpus to update share resources */
 463   xbt_swag_foreach_safe(cpu, cpu_next, cpu_ti_modified_cpu) {
 464     cpu_ti_update_action_finish_date(cpu, now);
 465   }
 466 /* get the min next event if heap not empty */
 467   if (xbt_heap_size(cpu_ti_action_heap) > 0)
 468     min_action_duration = xbt_heap_maxkey(cpu_ti_action_heap) - now;
 469
 470   XBT_DEBUG("Share resources, min next event date: %lf", min_action_duration);
 471
 472   return min_action_duration;
 473 }
 474
 475 static void cpu_ti_update_actions_state(double now, double delta)
 476 {
 477 #define GENERIC_ACTION(action) action->generic_action
 478   surf_action_cpu_ti_t action;
 479   while ((xbt_heap_size(cpu_ti_action_heap) > 0)
 480          && (xbt_heap_maxkey(cpu_ti_action_heap) <= now)) {
 481     action = xbt_heap_pop(cpu_ti_action_heap);
 482     XBT_DEBUG("Action %p: finish", action);
 483     GENERIC_ACTION(action).finish = surf_get_clock();
 484     /* set the remains to 0 due to precision problems when updating the remaining amount */
 485     GENERIC_ACTION(action).remains = 0;
 486     cpu_ti_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 487     /* update remaining amout of all actions */
 488     cpu_ti_update_remaining_amount(action->cpu, surf_get_clock());
 489   }
 490 #undef GENERIC_ACTION
 491 }
 492
 493 static void cpu_ti_update_resource_state(void *id,
 494                                          tmgr_trace_event_t event_type,
 495                                          double value, double date)
 496 {
 497   cpu_ti_t cpu = id;
 498   surf_action_cpu_ti_t action;
 499
 500   if (event_type == cpu->power_event) {
 501     tmgr_trace_t power_trace;
 502     surf_cpu_ti_tgmr_t trace;
 503     s_tmgr_event_t val;
 504
 505     XBT_DEBUG("Finish trace date: %lf value %lf date %lf", surf_get_clock(),
 506            value, date);
 507     /* update remaining of actions and put in modified cpu swag */
 508     cpu_ti_update_remaining_amount(cpu, date);
 509     xbt_swag_insert(cpu, cpu_ti_modified_cpu);
 510
 511     power_trace = cpu->avail_trace->power_trace;
 512     xbt_dynar_get_cpy(power_trace->event_list,
 513                       xbt_dynar_length(power_trace->event_list) - 1, &val);
 514     /* free old trace */
 515     surf_cpu_ti_free_tmgr(cpu->avail_trace);
 516     cpu->power_scale = val.value;
 517
 518     trace = xbt_new0(s_surf_cpu_ti_tgmr_t, 1);
 519     trace->type = TRACE_FIXED;
 520     trace->value = val.value;
 521     XBT_DEBUG("value %lf", val.value);
 522
 523     cpu->avail_trace = trace;
 524
 525     if (tmgr_trace_event_free(event_type))
 526       cpu->power_event = NULL;
 527
 528   } else if (event_type == cpu->state_event) {
 529     if (value > 0)
 530       cpu->state_current = SURF_RESOURCE_ON;
 531     else {
 532       cpu->state_current = SURF_RESOURCE_OFF;
 533
 534       /* put all action running on cpu to failed */
 535       xbt_swag_foreach(action, cpu->action_set) {
 536         if (surf_action_state_get((surf_action_t) action) ==
 537             SURF_ACTION_RUNNING
 538             || surf_action_state_get((surf_action_t) action) ==
 539             SURF_ACTION_READY
 540             || surf_action_state_get((surf_action_t) action) ==
 541             SURF_ACTION_NOT_IN_THE_SYSTEM) {
 542           action->generic_action.finish = date;
 543           cpu_ti_action_state_set((surf_action_t) action,
 544                                   SURF_ACTION_FAILED);
 545           if (action->index_heap >= 0) {
 546             surf_action_cpu_ti_t heap_act =
 547                 xbt_heap_remove(cpu_ti_action_heap, action->index_heap);
 548             if (heap_act != action)
 549               DIE_IMPOSSIBLE;
 550           }
 551         }
 552       }
 553     }
 554     if (tmgr_trace_event_free(event_type))
 555       cpu->state_event = NULL;
 556   } else {
 557     XBT_CRITICAL("Unknown event ! \n");
 558     xbt_abort();
 559   }
 560
 561   return;
 562 }
 563
 564 static surf_action_t cpu_ti_execute(void *cpu, double size)
 565 {
 566   surf_action_cpu_ti_t action = NULL;
 567   cpu_ti_t CPU = cpu;
 568
 569   XBT_IN("(%s,%g)", surf_resource_name(CPU), size);
 570   action =
 571       surf_action_new(sizeof(s_surf_action_cpu_ti_t), size, surf_cpu_model,
 572                       CPU->state_current != SURF_RESOURCE_ON);
 573   action->cpu = cpu;
 574   action->index_heap = -1;
 575
 576   xbt_swag_insert(CPU, cpu_ti_modified_cpu);
 577
 578   xbt_swag_insert(action, CPU->action_set);
 579
 580   action->suspended = 0;        /* Should be useless because of the
 581                                    calloc but it seems to help valgrind... */
 582
 583   XBT_OUT();
 584   return (surf_action_t) action;
 585 }
 586
 587 static void cpu_ti_action_update_index_heap(void *action, int i)
 588 {
 589   ((surf_action_cpu_ti_t) action)->index_heap = i;
 590 }
 591
 592 static surf_action_t cpu_ti_action_sleep(void *cpu, double duration)
 593 {
 594   surf_action_cpu_ti_t action = NULL;
 595
 596   if (duration > 0)
 597     duration = MAX(duration, MAXMIN_PRECISION);
 598
 599   XBT_IN("(%s,%g)", surf_resource_name(cpu), duration);
 600   action = (surf_action_cpu_ti_t) cpu_ti_execute(cpu, 1.0);
 601   action->generic_action.max_duration = duration;
 602   action->suspended = 2;
 603   if (duration == NO_MAX_DURATION) {
 604     /* Move to the *end* of the corresponding action set. This convention
 605        is used to speed up update_resource_state  */
 606     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 607     ((surf_action_t) action)->state_set =
 608         cpu_ti_running_action_set_that_does_not_need_being_checked;
 609     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 610   }
 611   XBT_OUT();
 612   return (surf_action_t) action;
 613 }
 614
 615 static void cpu_ti_action_suspend(surf_action_t action)
 616 {
 617   XBT_IN("(%p)", action);
 618   if (((surf_action_cpu_ti_t) action)->suspended != 2) {
 619     ((surf_action_cpu_ti_t) action)->suspended = 1;
 620     xbt_heap_remove(cpu_ti_action_heap,
 621                     ((surf_action_cpu_ti_t) action)->index_heap);
 622     xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
 623   }
 624   XBT_OUT();
 625 }
 626
 627 static void cpu_ti_action_resume(surf_action_t action)
 628 {
 629   XBT_IN("(%p)", action);
 630   if (((surf_action_cpu_ti_t) action)->suspended != 2) {
 631     ((surf_action_cpu_ti_t) action)->suspended = 0;
 632     xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
 633   }
 634   XBT_OUT();
 635 }
 636
 637 static int cpu_ti_action_is_suspended(surf_action_t action)
 638 {
 639   return (((surf_action_cpu_ti_t) action)->suspended == 1);
 640 }
 641
 642 static void cpu_ti_action_set_max_duration(surf_action_t action,
 643                                            double duration)
 644 {
 645   surf_action_cpu_ti_t ACT = (surf_action_cpu_ti_t) action;
 646   double min_finish;
 647
 648   XBT_IN("(%p,%g)", action, duration);
 649
 650   action->max_duration = duration;
 651
 652   if (duration >= 0)
 653     min_finish =
 654         (action->start + action->max_duration) <
 655         action->finish ? (action->start +
 656                           action->max_duration) : action->finish;
 657   else
 658     min_finish = action->finish;
 659
 660 /* add in action heap */
 661   if (ACT->index_heap >= 0) {
 662     surf_action_cpu_ti_t heap_act =
 663         xbt_heap_remove(cpu_ti_action_heap, ACT->index_heap);
 664     if (heap_act != ACT)
 665       DIE_IMPOSSIBLE;
 666   }
 667   xbt_heap_push(cpu_ti_action_heap, ACT, min_finish);
 668
 669   XBT_OUT();
 670 }
 671
 672 static void cpu_ti_action_set_priority(surf_action_t action,
 673                                        double priority)
 674 {
 675   XBT_IN("(%p,%g)", action, priority);
 676   action->priority = priority;
 677   xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
 678   XBT_OUT();
 679 }
 680
 681 static double cpu_ti_action_get_remains(surf_action_t action)
 682 {
 683   XBT_IN("(%p)", action);
 684   cpu_ti_update_remaining_amount((cpu_ti_t)
 685                                  ((surf_action_cpu_ti_t) action)->cpu,
 686                                  surf_get_clock());
 687   return action->remains;
 688   XBT_OUT();
 689 }
 690
 691 static e_surf_resource_state_t cpu_ti_get_state(void *cpu)
 692 {
 693   return ((cpu_ti_t) cpu)->state_current;
 694 }
 695
 696 static double cpu_ti_get_speed(void *cpu, double load)
 697 {
 698   return load * (((cpu_ti_t) cpu)->power_peak);
 699 }
 700
 701 /**
 702 * \brief Auxiliary function to update the CPU power scale.
 703 *
 704 *       This function uses the trace structure to return the power scale at the determined time a.
 705 * \param trace          Trace structure to search the updated power scale
 706 * \param a                              Time
 707 * \return CPU power scale
 708 */
 709 static double surf_cpu_ti_get_power_scale(surf_cpu_ti_tgmr_t trace,
 710                                           double a)
 711 {
 712   double reduced_a;
 713   int point;
 714   s_tmgr_event_t val;
 715
 716   reduced_a = a - floor(a / trace->last_time) * trace->last_time;
 717   point =
 718       surf_cpu_ti_binary_search(trace->trace->time_points, reduced_a, 0,
 719                                 trace->trace->nb_points - 1);
 720   xbt_dynar_get_cpy(trace->power_trace->event_list, point, &val);
 721   return val.value;
 722 }
 723
 724 static double cpu_ti_get_available_speed(void *cpu)
 725 {
 726   cpu_ti_t CPU = cpu;
 727   CPU->power_scale =
 728       surf_cpu_ti_get_power_scale(CPU->avail_trace, surf_get_clock());
 729 /* number between 0 and 1 */
 730   return CPU->power_scale;
 731 }
 732
 733 static void cpu_ti_finalize(void)
 734 {
 735   void **cpu;
 736   xbt_lib_cursor_t cursor;
 737   char *key;
 738
 739   xbt_lib_foreach(host_lib, cursor, key, cpu){
 740           if(cpu[SURF_CPU_LEVEL])
 741           {
 742                     cpu_ti_t CPU = cpu[SURF_CPU_LEVEL];
 743                     xbt_swag_free(CPU->action_set);
 744                     surf_cpu_ti_free_tmgr(CPU->avail_trace);
 745           }
 746   }
 747
 748   surf_model_exit(surf_cpu_model);
 749   surf_cpu_model = NULL;
 750
 751   xbt_swag_free
 752       (cpu_ti_running_action_set_that_does_not_need_being_checked);
 753   xbt_swag_free(cpu_ti_modified_cpu);
 754   cpu_ti_running_action_set_that_does_not_need_being_checked = NULL;
 755   xbt_heap_free(cpu_ti_action_heap);
 756 }
 757
 758 static void surf_cpu_ti_model_init_internal(void)
 759 {
 760   s_surf_action_t action;
 761   s_cpu_ti_t cpu;
 762
 763   surf_cpu_model = surf_model_init();
 764
 765   cpu_ti_running_action_set_that_does_not_need_being_checked =
 766       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 767
 768   cpu_ti_modified_cpu =
 769       xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
 770
 771   surf_cpu_model->name = "CPU_TI";
 772
 773   surf_cpu_model->action_unref = cpu_ti_action_unref;
 774   surf_cpu_model->action_cancel = cpu_ti_action_cancel;
 775   surf_cpu_model->action_state_set = cpu_ti_action_state_set;
 776
 777   surf_cpu_model->model_private->resource_used = cpu_ti_resource_used;
 778   surf_cpu_model->model_private->share_resources = cpu_ti_share_resources;
 779   surf_cpu_model->model_private->update_actions_state =
 780       cpu_ti_update_actions_state;
 781   surf_cpu_model->model_private->update_resource_state =
 782       cpu_ti_update_resource_state;
 783   surf_cpu_model->model_private->finalize = cpu_ti_finalize;
 784
 785   surf_cpu_model->suspend = cpu_ti_action_suspend;
 786   surf_cpu_model->resume = cpu_ti_action_resume;
 787   surf_cpu_model->is_suspended = cpu_ti_action_is_suspended;
 788   surf_cpu_model->set_max_duration = cpu_ti_action_set_max_duration;
 789   surf_cpu_model->set_priority = cpu_ti_action_set_priority;
 790   surf_cpu_model->get_remains = cpu_ti_action_get_remains;
 791
 792   surf_cpu_model->extension.cpu.execute = cpu_ti_execute;
 793   surf_cpu_model->extension.cpu.sleep = cpu_ti_action_sleep;
 794
 795   surf_cpu_model->extension.cpu.get_state = cpu_ti_get_state;
 796   surf_cpu_model->extension.cpu.get_speed = cpu_ti_get_speed;
 797   surf_cpu_model->extension.cpu.get_available_speed =
 798       cpu_ti_get_available_speed;
 799   surf_cpu_model->extension.cpu.create_resource = cpu_ti_create_resource;
 800   surf_cpu_model->extension.cpu.add_traces = add_traces_cpu_ti;
 801
 802   cpu_ti_action_heap = xbt_heap_new(8, NULL);
 803   xbt_heap_set_update_callback(cpu_ti_action_heap,
 804                                cpu_ti_action_update_index_heap);
 805
 806 }
 807
 808 void surf_cpu_model_init_ti()
 809 {
 810   if (surf_cpu_model)
 811     return;
 812   surf_cpu_ti_model_init_internal();
 813   cpu_ti_define_callbacks();
 814   xbt_dynar_push(model_list, &surf_cpu_model);
 815 }
 816
 817
 818 /**
 819 * \brief Integrate trace
 820 *
 821 * Wrapper around surf_cpu_integrate_trace_simple() to get
 822 * the cyclic effect.
 823 *
 824 * \param trace Trace structure.
 825 * \param a                      Begin of interval
 826 * \param b                      End of interval
 827 * \return the integrate value. -1 if an error occurs.
 828 */
 829 static double surf_cpu_ti_integrate_trace(surf_cpu_ti_tgmr_t trace,
 830                                           double a, double b)
 831 {
 832   double first_chunk;
 833   double middle_chunk;
 834   double last_chunk;
 835   int a_index, b_index;
 836
 837   if ((a < 0.0) || (a > b)) {
 838     XBT_CRITICAL
 839         ("Error, invalid integration interval [%.2f,%.2f]. You probably have a task executing with negative computation amount. Check your code.",
 840          a, b);
 841     xbt_abort();
 842   }
 843   if (a == b)
 844     return 0.0;
 845
 846   if (trace->type == TRACE_FIXED) {
 847     return ((b - a) * trace->value);
 848   }
 849
 850   if (ceil(a / trace->last_time) == a / trace->last_time)
 851     a_index = 1 + (int) (ceil(a / trace->last_time));
 852   else
 853     a_index = (int) (ceil(a / trace->last_time));
 854
 855   b_index = (int) (floor(b / trace->last_time));
 856
 857   if (a_index > b_index) {      /* Same chunk */
 858     return surf_cpu_ti_integrate_trace_simple(trace->trace,
 859                                               a - (a_index -
 860                                                    1) * trace->last_time,
 861                                               b -
 862                                               (b_index) *
 863                                               trace->last_time);
 864   }
 865
 866   first_chunk = surf_cpu_ti_integrate_trace_simple(trace->trace,
 867                                                    a - (a_index -
 868                                                         1) *
 869                                                    trace->last_time,
 870                                                    trace->last_time);
 871   middle_chunk = (b_index - a_index) * trace->total;
 872   last_chunk = surf_cpu_ti_integrate_trace_simple(trace->trace,
 873                                                   0.0,
 874                                                   b -
 875                                                   (b_index) *
 876                                                   trace->last_time);
 877
 878   XBT_DEBUG("first_chunk=%.2f  middle_chunk=%.2f  last_chunk=%.2f\n",
 879          first_chunk, middle_chunk, last_chunk);
 880
 881   return (first_chunk + middle_chunk + last_chunk);
 882 }
 883
 884 /**
 885  * \brief Auxiliary function to calculate the integral between a and b.
 886  *              It simply calculates the integral at point a and b and returns the difference
 887  *      between them.
 888  * \param trace         Trace structure
 889  * \param a                             Initial point
 890  * \param b     Final point
 891  * \return      Integral
 892 */
 893 static double surf_cpu_ti_integrate_trace_simple(surf_cpu_ti_trace_t trace,
 894                                                  double a, double b)
 895 {
 896   return surf_cpu_ti_integrate_trace_simple_point(trace,
 897                                                   b) -
 898       surf_cpu_ti_integrate_trace_simple_point(trace, a);
 899 }
 900
 901 /**
 902  * \brief Auxiliary function to calculate the integral at point a.
 903  * \param trace         Trace structure
 904  * \param a                             point
 905  * \return      Integral
 906 */
 907 static double surf_cpu_ti_integrate_trace_simple_point(surf_cpu_ti_trace_t
 908                                                        trace, double a)
 909 {
 910   double integral = 0;
 911   int ind;
 912   double a_aux = a;
 913   ind =
 914       surf_cpu_ti_binary_search(trace->time_points, a, 0,
 915                                 trace->nb_points - 1);
 916   integral += trace->integral[ind];
 917   XBT_DEBUG
 918       ("a %lf ind %d integral %lf ind + 1 %lf ind %lf time +1 %lf time %lf",
 919        a, ind, integral, trace->integral[ind + 1], trace->integral[ind],
 920        trace->time_points[ind + 1], trace->time_points[ind]);
 921   double_update(&a_aux, trace->time_points[ind]);
 922   if (a_aux > 0)
 923     integral +=
 924         ((trace->integral[ind + 1] -
 925           trace->integral[ind]) / (trace->time_points[ind + 1] -
 926                                    trace->time_points[ind])) * (a -
 927                                                                 trace->
 928                                                                 time_points
 929                                                                 [ind]);
 930   XBT_DEBUG("Integral a %lf = %lf", a, integral);
 931
 932   return integral;
 933 }
 934
 935 /**
 936 * \brief Calculate the time needed to execute "amount" on cpu.
 937 *
 938 * Here, amount can span multiple trace periods
 939 *
 940 * \param trace  CPU trace structure
 941 * \param a                              Initial time
 942 * \param amount Amount to be executed
 943 * \return       End time
 944 */
 945 static double surf_cpu_ti_solve_trace(surf_cpu_ti_tgmr_t trace, double a,
 946                                       double amount)
 947 {
 948   int quotient;
 949   double reduced_b;
 950   double reduced_amount;
 951   double reduced_a;
 952   double b;
 953
 954 /* Fix very small negative numbers */
 955   if ((a < 0.0) && (a > -EPSILON)) {
 956     a = 0.0;
 957   }
 958   if ((amount < 0.0) && (amount > -EPSILON)) {
 959     amount = 0.0;
 960   }
 961
 962 /* Sanity checks */
 963   if ((a < 0.0) || (amount < 0.0)) {
 964     XBT_CRITICAL
 965         ("Error, invalid parameters [a = %.2f, amount = %.2f]. You probably have a task executing with negative computation amount. Check your code.",
 966          a, amount);
 967     xbt_abort();
 968   }
 969
 970 /* At this point, a and amount are positive */
 971
 972   if (amount < EPSILON)
 973     return a;
 974
 975 /* Is the trace fixed ? */
 976   if (trace->type == TRACE_FIXED) {
 977     return (a + (amount / trace->value));
 978   }
 979
 980   XBT_DEBUG("amount %lf total %lf", amount, trace->total);
 981 /* Reduce the problem to one where amount <= trace_total */
 982   quotient = (int) (floor(amount / trace->total));
 983   reduced_amount = (trace->total) * ((amount / trace->total) -
 984                                      floor(amount / trace->total));
 985   reduced_a = a - (trace->last_time) * (int) (floor(a / trace->last_time));
 986
 987   XBT_DEBUG("Quotient: %d reduced_amount: %lf reduced_a: %lf", quotient,
 988          reduced_amount, reduced_a);
 989
 990 /* Now solve for new_amount which is <= trace_total */
 991 /*
 992          fprintf(stderr,"reduced_a = %.2f\n",reduced_a);
 993          fprintf(stderr,"reduced_amount = %.2f\n",reduced_amount);
 994  */
 995   reduced_b =
 996       surf_cpu_ti_solve_trace_somewhat_simple(trace, reduced_a,
 997                                               reduced_amount);
 998
 999 /* Re-map to the original b and amount */
1000   b = (trace->last_time) * (int) (floor(a / trace->last_time)) +
1001       (quotient * trace->last_time) + reduced_b;
1002   return b;
1003 }
1004
1005 /**
1006 * \brief Auxiliary function to solve integral
1007 *
1008 * Here, amount is <= trace->total
1009 * and a <=trace->last_time
1010 *
1011 */
1012 static double surf_cpu_ti_solve_trace_somewhat_simple(surf_cpu_ti_tgmr_t
1013                                                       trace, double a,
1014                                                       double amount)
1015 {
1016   double amount_till_end;
1017   double b;
1018
1019   XBT_DEBUG("Solve integral: [%.2f, amount=%.2f]", a, amount);
1020   amount_till_end =
1021       surf_cpu_ti_integrate_trace(trace, a, trace->last_time);
1022 /*
1023          fprintf(stderr,"amount_till_end=%.2f\n",amount_till_end);
1024  */
1025
1026   if (amount_till_end > amount) {
1027     b = surf_cpu_ti_solve_trace_simple(trace->trace, a, amount);
1028   } else {
1029     b = trace->last_time +
1030         surf_cpu_ti_solve_trace_simple(trace->trace, 0.0,
1031                                        amount - amount_till_end);
1032   }
1033   return b;
1034 }
1035
1036 /**
1037  * \brief Auxiliary function to solve integral.
1038  *      It returns the date when the requested amount of flops is available
1039  * \param trace         Trace structure
1040  * \param a                             Initial point
1041  * \param amount        Amount of flops
1042  * \return The date when amount is available.
1043 */
1044 static double surf_cpu_ti_solve_trace_simple(surf_cpu_ti_trace_t trace,
1045                                              double a, double amount)
1046 {
1047   double integral_a;
1048   int ind;
1049   double time;
1050   integral_a = surf_cpu_ti_integrate_trace_simple_point(trace, a);
1051   ind =
1052       surf_cpu_ti_binary_search(trace->integral, integral_a + amount, 0,
1053                                 trace->nb_points - 1);
1054   time = trace->time_points[ind];
1055   time +=
1056       (integral_a + amount -
1057        trace->integral[ind]) / ((trace->integral[ind + 1] -
1058                                  trace->integral[ind]) /
1059                                 (trace->time_points[ind + 1] -
1060                                  trace->time_points[ind]));
1061
1062   return time;
1063 }
1064
1065 /**
1066  * \brief Binary search in array.
1067  *      It returns the first point of the interval in which "a" is.
1068  * \param array         Array
1069  * \param a                             Value to search
1070  * \param low           Low bound to search in array
1071  * \param high          Upper bound to search in array
1072  * \return Index of point
1073 */
1074 static int surf_cpu_ti_binary_search(double *array, double a, int low,
1075                                      int high)
1076 {
1077   xbt_assert(low < high, "Wrong parameters: low (%d) should be smaller than"
1078       " high (%d)", low, high);
1079
1080   int mid;
1081   do {
1082     mid = low + (high - low) / 2;
1083     XBT_DEBUG("a %lf low %d high %d mid %d value %lf", a, low, high, mid,
1084         array[mid]);
1085
1086     if (array[mid] > a)
1087       high = mid;
1088     else
1089       low = mid;
1090   }
1091   while (low < high - 1);
1092
1093   return low;
1094 }