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