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
  19 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_ti, surf,
  20                                 "Logging specific to the SURF CPU TRACE INTEGRATION module");
  21
  22
  23 static xbt_swag_t
  24     cpu_ti_running_action_set_that_does_not_need_being_checked = NULL;
  25 static xbt_swag_t cpu_ti_modified_cpu = NULL;
  26 static xbt_heap_t cpu_ti_action_heap;
  27
  28 /* prototypes of new trace functions */
  29 static double surf_cpu_ti_integrate_trace(surf_cpu_ti_tgmr_t trace,
  30                                           double a, double b);
  31
  32
  33 static double surf_cpu_ti_solve_trace(surf_cpu_ti_tgmr_t trace, double a,
  34                                       double amount);
  35 static double surf_cpu_ti_solve_trace_somewhat_simple(surf_cpu_ti_tgmr_t
  36                                                       trace, double a,
  37                                                       double amount);
  38
  39 static void surf_cpu_ti_free_tmgr(surf_cpu_ti_tgmr_t trace);
  40
  41 static double surf_cpu_ti_integrate_trace_simple(surf_cpu_ti_trace_t trace,
  42                                                  double a, double b);
  43 static double surf_cpu_ti_integrate_trace_simple_point(surf_cpu_ti_trace_t
  44                                                        trace, double a);
  45 static double surf_cpu_ti_solve_trace_simple(surf_cpu_ti_trace_t trace,
  46                                              double a, double amount);
  47 static int surf_cpu_ti_binary_search(double *array, double a, int low,
  48                                      int high);
  49 /* end prototypes */
  50
  51 static void surf_cpu_ti_free_trace(surf_cpu_ti_trace_t trace)
  52 {
  53   if (trace->time_points)
  54     xbt_free(trace->time_points);
  55   if (trace->integral)
  56     xbt_free(trace->integral);
  57   xbt_free(trace);
  58 }
  59
  60 static void surf_cpu_ti_free_tmgr(surf_cpu_ti_tgmr_t trace)
  61 {
  62   if (trace->trace)
  63     surf_cpu_ti_free_trace(trace->trace);
  64   xbt_free(trace);
  65 }
  66
  67 static surf_cpu_ti_trace_t surf_cpu_ti_trace_new(tmgr_trace_t power_trace)
  68 {
  69   surf_cpu_ti_trace_t trace;
  70   s_tmgr_event_t val;
  71   unsigned int cpt;
  72   double integral = 0;
  73   double time = 0;
  74   int i = 0;
  75   trace = xbt_new0(s_surf_cpu_ti_trace_t, 1);
  76   trace->time_points =
  77       xbt_malloc0(sizeof(double) *
  78                   (xbt_dynar_length(power_trace->event_list) + 1));
  79   trace->integral =
  80       xbt_malloc0(sizeof(double) *
  81                   (xbt_dynar_length(power_trace->event_list) + 1));
  82   trace->nb_points = xbt_dynar_length(power_trace->event_list);
  83   xbt_dynar_foreach(power_trace->event_list, cpt, val) {
  84     trace->time_points[i] = time;
  85     trace->integral[i] = integral;
  86     integral += val.delta * val.value;
  87     time += val.delta;
  88     i++;
  89   }
  90   trace->time_points[i] = time;
  91   trace->integral[i] = integral;
  92   return trace;
  93 }
  94
  95 /**
  96 * \brief Creates a new integration trace from a tmgr_trace_t
  97 *
  98 * \param        power_trace             CPU availability trace
  99 * \param        value                                   Percentage of CPU power available (useful to fixed tracing)
 100 * \param        spacing                         Initial spacing
 101 * \return       Integration trace structure
 102 */
 103 static surf_cpu_ti_tgmr_t cpu_ti_parse_trace(tmgr_trace_t power_trace,
 104                                              double value)
 105 {
 106   surf_cpu_ti_tgmr_t trace;
 107   double total_time = 0.0;
 108   s_tmgr_event_t val;
 109   unsigned int cpt;
 110   trace = xbt_new0(s_surf_cpu_ti_tgmr_t, 1);
 111
 112 /* no availability file, fixed trace */
 113   if (!power_trace) {
 114     trace->type = TRACE_FIXED;
 115     trace->value = value;
 116     DEBUG1("No availabily trace. Constant value = %lf", value);
 117     return trace;
 118   }
 119
 120   /* only one point available, fixed trace */
 121   if (xbt_dynar_length(power_trace->event_list) == 1) {
 122     xbt_dynar_get_cpy(power_trace->event_list, 0, &val);
 123     trace->type = TRACE_FIXED;
 124     trace->value = val.value;
 125     return trace;
 126   }
 127
 128   trace->type = TRACE_DYNAMIC;
 129   trace->power_trace = power_trace;
 130
 131   /* count the total time of trace file */
 132   xbt_dynar_foreach(power_trace->event_list, cpt, val) {
 133     total_time += val.delta;
 134   }
 135   trace->trace = surf_cpu_ti_trace_new(power_trace);
 136   trace->last_time = total_time;
 137   trace->total =
 138       surf_cpu_ti_integrate_trace_simple(trace->trace, 0, total_time);
 139
 140   DEBUG2("Total integral %lf, last_time %lf ",
 141          trace->total, trace->last_time);
 142
 143   return trace;
 144 }
 145
 146
 147 static cpu_ti_t cpu_ti_new(char *name, double power_peak,
 148                            double power_scale,
 149                            tmgr_trace_t power_trace,
 150                            int core,
 151                            e_surf_resource_state_t state_initial,
 152                            tmgr_trace_t state_trace,
 153                            xbt_dict_t cpu_properties)
 154 {
 155   tmgr_trace_t empty_trace;
 156   s_tmgr_event_t val;
 157   cpu_ti_t cpu = xbt_new0(s_cpu_ti_t, 1);
 158   s_surf_action_cpu_ti_t ti_action;
 159   xbt_assert1(!surf_model_resource_by_name(surf_cpu_model, name),
 160               "Host '%s' declared several times in the platform file",
 161               name);
 162   xbt_assert0(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_assert0(cpu->power_peak > 0, "Power has to be >0");
 170   DEBUG1("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_dict_set(surf_model_resource_set(surf_cpu_model), name, cpu,
 189                surf_resource_free);
 190
 191   return cpu;
 192 }
 193
 194
 195 static void parse_cpu_ti_init(void)
 196 {
 197   double power_peak = 0.0;
 198   double power_scale = 0.0;
 199   int core = 0;
 200   tmgr_trace_t power_trace = NULL;
 201   e_surf_resource_state_t state_initial = SURF_RESOURCE_OFF;
 202   tmgr_trace_t state_trace = NULL;
 203
 204   power_peak = get_cpu_power(A_surfxml_host_power);
 205   surf_parse_get_double(&power_scale, A_surfxml_host_availability);
 206   power_trace = tmgr_trace_new(A_surfxml_host_availability_file);
 207   surf_parse_get_int(&core, A_surfxml_host_core);
 208
 209   xbt_assert0((A_surfxml_host_state == A_surfxml_host_state_ON) ||
 210               (A_surfxml_host_state == A_surfxml_host_state_OFF),
 211               "Invalid state");
 212   if (A_surfxml_host_state == A_surfxml_host_state_ON)
 213     state_initial = SURF_RESOURCE_ON;
 214   if (A_surfxml_host_state == A_surfxml_host_state_OFF)
 215     state_initial = SURF_RESOURCE_OFF;
 216   state_trace = tmgr_trace_new(A_surfxml_host_state_file);
 217
 218   current_property_set = xbt_dict_new();
 219   cpu_ti_new(xbt_strdup(A_surfxml_host_id), power_peak, power_scale,
 220              power_trace, core, state_initial, state_trace,
 221              current_property_set);
 222
 223 }
 224
 225 static void add_traces_cpu_ti(void)
 226 {
 227   xbt_dict_cursor_t cursor = NULL;
 228   char *trace_name, *elm;
 229
 230   static int called = 0;
 231
 232   if (called)
 233     return;
 234   called = 1;
 235
 236 /* connect all traces relative to hosts */
 237   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 238     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 239     cpu_ti_t cpu = surf_model_resource_by_name(surf_cpu_model, elm);
 240
 241     xbt_assert1(cpu, "Host %s undefined", elm);
 242     xbt_assert1(trace, "Trace %s undefined", trace_name);
 243
 244     if (cpu->state_event) {
 245       DEBUG1("Trace already configured for this CPU(%s), ignoring it",
 246              elm);
 247       continue;
 248     }
 249     DEBUG2("Add state trace: %s to CPU(%s)", trace_name, elm);
 250     cpu->state_event = tmgr_history_add_trace(history, trace, 0.0, 0, cpu);
 251   }
 252
 253   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 254     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 255     cpu_ti_t cpu = surf_model_resource_by_name(surf_cpu_model, elm);
 256
 257     xbt_assert1(cpu, "Host %s undefined", elm);
 258     xbt_assert1(trace, "Trace %s undefined", trace_name);
 259
 260     DEBUG2("Add power trace: %s to CPU(%s)", trace_name, elm);
 261     if (cpu->avail_trace)
 262       surf_cpu_ti_free_tmgr(cpu->avail_trace);
 263
 264     cpu->avail_trace = cpu_ti_parse_trace(trace, cpu->power_scale);
 265
 266     /* add a fake trace event if periodicity == 0 */
 267     if (trace && xbt_dynar_length(trace->event_list) > 1) {
 268       s_tmgr_event_t val;
 269       xbt_dynar_get_cpy(trace->event_list,
 270                         xbt_dynar_length(trace->event_list) - 1, &val);
 271       if (val.delta == 0) {
 272         tmgr_trace_t empty_trace;
 273         empty_trace = tmgr_empty_trace_new();
 274         cpu->power_event =
 275             tmgr_history_add_trace(history, empty_trace,
 276                                    cpu->avail_trace->last_time, 0, cpu);
 277       }
 278     }
 279   }
 280 }
 281
 282 static void cpu_ti_define_callbacks(const char *file)
 283 {
 284   surf_parse_reset_parser();
 285   surfxml_add_callback(STag_surfxml_host_cb_list, parse_cpu_ti_init);
 286   surfxml_add_callback(ETag_surfxml_platform_cb_list, &add_traces_cpu_ti);
 287 }
 288
 289 static int cpu_ti_resource_used(void *resource_id)
 290 {
 291   cpu_ti_t cpu = resource_id;
 292   return xbt_swag_size(cpu->action_set);
 293 }
 294
 295 static int cpu_ti_action_unref(surf_action_t action)
 296 {
 297   action->refcount--;
 298   if (!action->refcount) {
 299     xbt_swag_remove(action, action->state_set);
 300     /* remove from action_set */
 301     xbt_swag_remove(action, ACTION_GET_CPU(action)->action_set);
 302     /* remove from heap */
 303     xbt_heap_remove(cpu_ti_action_heap,
 304                     ((surf_action_cpu_ti_t) action)->index_heap);
 305     xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
 306     free(action);
 307     return 1;
 308   }
 309   return 0;
 310 }
 311
 312 static void cpu_ti_action_cancel(surf_action_t action)
 313 {
 314   surf_action_state_set(action, SURF_ACTION_FAILED);
 315   xbt_heap_remove(cpu_ti_action_heap,
 316                   ((surf_action_cpu_ti_t) action)->index_heap);
 317   xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
 318   return;
 319 }
 320
 321 static void cpu_ti_action_state_set(surf_action_t action,
 322                                     e_surf_action_state_t state)
 323 {
 324   surf_action_state_set(action, state);
 325   xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
 326   return;
 327 }
 328
 329 /**
 330 * \brief Update the remaining amount of actions
 331 *
 332 * \param        cpu             Cpu on which the actions are running
 333 * \param        now             Current time
 334 */
 335 static void cpu_ti_update_remaining_amount(cpu_ti_t cpu, double now)
 336 {
 337 #define GENERIC_ACTION(action) action->generic_action
 338   double area_total;
 339   surf_action_cpu_ti_t action;
 340
 341 /* already updated */
 342   if (cpu->last_update >= now)
 343     return;
 344
 345 /* calcule the surface */
 346   area_total =
 347       surf_cpu_ti_integrate_trace(cpu->avail_trace, cpu->last_update,
 348                                   now) * cpu->power_peak;
 349   DEBUG2("Flops total: %lf, Last update %lf", area_total,
 350          cpu->last_update);
 351
 352   xbt_swag_foreach(action, cpu->action_set) {
 353     /* action not running, skip it */
 354     if (GENERIC_ACTION(action).state_set !=
 355         surf_cpu_model->states.running_action_set)
 356       continue;
 357
 358     /* bogus priority, skip it */
 359     if (GENERIC_ACTION(action).priority <= 0)
 360       continue;
 361
 362     /* action suspended, skip it */
 363     if (action->suspended != 0)
 364       continue;
 365
 366     /* action don't need update */
 367     if (GENERIC_ACTION(action).start >= now)
 368       continue;
 369
 370     /* skip action that are finishing now */
 371     if (GENERIC_ACTION(action).finish >= 0
 372         && GENERIC_ACTION(action).finish <= now)
 373       continue;
 374
 375     /* update remaining */
 376     double_update(&(GENERIC_ACTION(action).remains),
 377                   area_total / (cpu->sum_priority *
 378                                 GENERIC_ACTION(action).priority));
 379     DEBUG2("Update remaining action(%p) remaining %lf", action,
 380            GENERIC_ACTION(action).remains);
 381   }
 382   cpu->last_update = now;
 383 #undef GENERIC_ACTION
 384 }
 385
 386 /**
 387 * \brief Update the finish date of action if necessary
 388 *
 389 * \param        cpu             Cpu on which the actions are running
 390 * \param        now             Current time
 391 */
 392 static void cpu_ti_update_action_finish_date(cpu_ti_t cpu, double now)
 393 {
 394 #define GENERIC_ACTION(action) action->generic_action
 395   surf_action_cpu_ti_t action;
 396   double sum_priority = 0.0, total_area, min_finish = -1;
 397
 398 /* update remaning amount of actions */
 399   cpu_ti_update_remaining_amount(cpu, now);
 400
 401   xbt_swag_foreach(action, cpu->action_set) {
 402     /* action not running, skip it */
 403     if (GENERIC_ACTION(action).state_set !=
 404         surf_cpu_model->states.running_action_set)
 405       continue;
 406
 407     /* bogus priority, skip it */
 408     if (GENERIC_ACTION(action).priority <= 0)
 409       continue;
 410
 411     /* action suspended, skip it */
 412     if (action->suspended != 0)
 413       continue;
 414
 415     sum_priority += 1.0 / GENERIC_ACTION(action).priority;
 416   }
 417   cpu->sum_priority = sum_priority;
 418
 419   xbt_swag_foreach(action, cpu->action_set) {
 420     min_finish = -1;
 421     /* action not running, skip it */
 422     if (GENERIC_ACTION(action).state_set !=
 423         surf_cpu_model->states.running_action_set)
 424       continue;
 425
 426     /* verify if the action is really running on cpu */
 427     if (action->suspended == 0 && GENERIC_ACTION(action).priority > 0) {
 428       /* total area needed to finish the action. Used in trace integration */
 429       total_area =
 430           (GENERIC_ACTION(action).remains) * sum_priority *
 431           GENERIC_ACTION(action).priority;
 432
 433       total_area /= cpu->power_peak;
 434
 435       GENERIC_ACTION(action).finish =
 436           surf_cpu_ti_solve_trace(cpu->avail_trace, now, total_area);
 437       /* verify which event will happen before (max_duration or finish time) */
 438       if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION) &&
 439           (GENERIC_ACTION(action).start +
 440            GENERIC_ACTION(action).max_duration <
 441            GENERIC_ACTION(action).finish))
 442         min_finish = GENERIC_ACTION(action).start +
 443             GENERIC_ACTION(action).max_duration;
 444       else
 445         min_finish = GENERIC_ACTION(action).finish;
 446     } else {
 447       /* put the max duration time on heap */
 448       if (GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 449         min_finish =
 450             (GENERIC_ACTION(action).start +
 451              GENERIC_ACTION(action).max_duration);
 452     }
 453     /* add in action heap */
 454     DEBUG2("action(%p) index %d", action, action->index_heap);
 455     if (action->index_heap >= 0) {
 456       surf_action_cpu_ti_t heap_act =
 457           xbt_heap_remove(cpu_ti_action_heap, action->index_heap);
 458       if (heap_act != action)
 459         DIE_IMPOSSIBLE;
 460     }
 461     if (min_finish != NO_MAX_DURATION)
 462       xbt_heap_push(cpu_ti_action_heap, action, min_finish);
 463
 464     DEBUG5
 465         ("Update finish time: Cpu(%s) Action: %p, Start Time: %lf Finish Time: %lf Max duration %lf",
 466          cpu->generic_resource.name, action, GENERIC_ACTION(action).start,
 467          GENERIC_ACTION(action).finish,
 468          GENERIC_ACTION(action).max_duration);
 469   }
 470 /* remove from modified cpu */
 471   xbt_swag_remove(cpu, cpu_ti_modified_cpu);
 472 #undef GENERIC_ACTION
 473 }
 474
 475 static double cpu_ti_share_resources(double now)
 476 {
 477   cpu_ti_t cpu, cpu_next;
 478   double min_action_duration = -1;
 479
 480 /* iterates over modified cpus to update share resources */
 481   xbt_swag_foreach_safe(cpu, cpu_next, cpu_ti_modified_cpu) {
 482     cpu_ti_update_action_finish_date(cpu, now);
 483   }
 484 /* get the min next event if heap not empty */
 485   if (xbt_heap_size(cpu_ti_action_heap) > 0)
 486     min_action_duration = xbt_heap_maxkey(cpu_ti_action_heap) - now;
 487
 488   DEBUG1("Share resources, min next event date: %lf", min_action_duration);
 489
 490   return min_action_duration;
 491 }
 492
 493 static void cpu_ti_update_actions_state(double now, double delta)
 494 {
 495 #define GENERIC_ACTION(action) action->generic_action
 496   surf_action_cpu_ti_t action;
 497   while ((xbt_heap_size(cpu_ti_action_heap) > 0)
 498          && (xbt_heap_maxkey(cpu_ti_action_heap) <= now)) {
 499     action = xbt_heap_pop(cpu_ti_action_heap);
 500     DEBUG1("Action %p: finish", action);
 501     GENERIC_ACTION(action).finish = surf_get_clock();
 502     /* set the remains to 0 due to precision problems when updating the remaining amount */
 503     GENERIC_ACTION(action).remains = 0;
 504     cpu_ti_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 505     /* update remaining amout of all actions */
 506     cpu_ti_update_remaining_amount(action->cpu, surf_get_clock());
 507   }
 508 #undef GENERIC_ACTION
 509 }
 510
 511 static void cpu_ti_update_resource_state(void *id,
 512                                          tmgr_trace_event_t event_type,
 513                                          double value, double date)
 514 {
 515   cpu_ti_t cpu = id;
 516   surf_action_cpu_ti_t action;
 517
 518   if (event_type == cpu->power_event) {
 519     tmgr_trace_t power_trace;
 520     surf_cpu_ti_tgmr_t trace;
 521     s_tmgr_event_t val;
 522
 523     DEBUG3("Finish trace date: %lf value %lf date %lf", surf_get_clock(),
 524            value, date);
 525     /* update remaining of actions and put in modified cpu swag */
 526     cpu_ti_update_remaining_amount(cpu, date);
 527     xbt_swag_insert(cpu, cpu_ti_modified_cpu);
 528
 529     power_trace = cpu->avail_trace->power_trace;
 530     xbt_dynar_get_cpy(power_trace->event_list,
 531                       xbt_dynar_length(power_trace->event_list) - 1, &val);
 532     /* free old trace */
 533     surf_cpu_ti_free_tmgr(cpu->avail_trace);
 534     cpu->power_scale = val.value;
 535
 536     trace = xbt_new0(s_surf_cpu_ti_tgmr_t, 1);
 537     trace->type = TRACE_FIXED;
 538     trace->value = val.value;
 539     DEBUG1("value %lf", val.value);
 540
 541     cpu->avail_trace = trace;
 542
 543     if (tmgr_trace_event_free(event_type))
 544       cpu->power_event = NULL;
 545
 546   } else if (event_type == cpu->state_event) {
 547     if (value > 0)
 548       cpu->state_current = SURF_RESOURCE_ON;
 549     else {
 550       cpu->state_current = SURF_RESOURCE_OFF;
 551
 552       /* put all action running on cpu to failed */
 553       xbt_swag_foreach(action, cpu->action_set) {
 554         if (surf_action_state_get((surf_action_t) action) ==
 555             SURF_ACTION_RUNNING
 556             || surf_action_state_get((surf_action_t) action) ==
 557             SURF_ACTION_READY
 558             || surf_action_state_get((surf_action_t) action) ==
 559             SURF_ACTION_NOT_IN_THE_SYSTEM) {
 560           action->generic_action.finish = date;
 561           cpu_ti_action_state_set((surf_action_t) action,
 562                                   SURF_ACTION_FAILED);
 563           if (action->index_heap >= 0) {
 564             surf_action_cpu_ti_t heap_act =
 565                 xbt_heap_remove(cpu_ti_action_heap, action->index_heap);
 566             if (heap_act != action)
 567               DIE_IMPOSSIBLE;
 568           }
 569         }
 570       }
 571     }
 572     if (tmgr_trace_event_free(event_type))
 573       cpu->state_event = NULL;
 574   } else {
 575     CRITICAL0("Unknown event ! \n");
 576     xbt_abort();
 577   }
 578
 579   return;
 580 }
 581
 582 static surf_action_t cpu_ti_execute(void *cpu, double size)
 583 {
 584   surf_action_cpu_ti_t action = NULL;
 585   cpu_ti_t CPU = cpu;
 586
 587   XBT_IN2("(%s,%g)", surf_resource_name(CPU), size);
 588   action =
 589       surf_action_new(sizeof(s_surf_action_cpu_ti_t), size, surf_cpu_model,
 590                       CPU->state_current != SURF_RESOURCE_ON);
 591   action->cpu = cpu;
 592   action->index_heap = -1;
 593
 594   xbt_swag_insert(CPU, cpu_ti_modified_cpu);
 595
 596   xbt_swag_insert(action, CPU->action_set);
 597
 598   action->suspended = 0;        /* Should be useless because of the
 599                                    calloc but it seems to help valgrind... */
 600
 601   XBT_OUT;
 602   return (surf_action_t) action;
 603 }
 604
 605 static void cpu_ti_action_update_index_heap(void *action, int i)
 606 {
 607   ((surf_action_cpu_ti_t) action)->index_heap = i;
 608 }
 609
 610 static surf_action_t cpu_ti_action_sleep(void *cpu, double duration)
 611 {
 612   surf_action_cpu_ti_t action = NULL;
 613
 614   if (duration > 0)
 615     duration = MAX(duration, MAXMIN_PRECISION);
 616
 617   XBT_IN2("(%s,%g)", surf_resource_name(cpu), duration);
 618   action = (surf_action_cpu_ti_t) cpu_ti_execute(cpu, 1.0);
 619   action->generic_action.max_duration = duration;
 620   action->suspended = 2;
 621   if (duration == NO_MAX_DURATION) {
 622     /* Move to the *end* of the corresponding action set. This convention
 623        is used to speed up update_resource_state  */
 624     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 625     ((surf_action_t) action)->state_set =
 626         cpu_ti_running_action_set_that_does_not_need_being_checked;
 627     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 628   }
 629   XBT_OUT;
 630   return (surf_action_t) action;
 631 }
 632
 633 static void cpu_ti_action_suspend(surf_action_t action)
 634 {
 635   XBT_IN1("(%p)", action);
 636   if (((surf_action_cpu_ti_t) action)->suspended != 2) {
 637     ((surf_action_cpu_ti_t) action)->suspended = 1;
 638     xbt_heap_remove(cpu_ti_action_heap,
 639                     ((surf_action_cpu_ti_t) action)->index_heap);
 640     xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
 641   }
 642   XBT_OUT;
 643 }
 644
 645 static void cpu_ti_action_resume(surf_action_t action)
 646 {
 647   XBT_IN1("(%p)", action);
 648   if (((surf_action_cpu_ti_t) action)->suspended != 2) {
 649     ((surf_action_cpu_ti_t) action)->suspended = 0;
 650     xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
 651   }
 652   XBT_OUT;
 653 }
 654
 655 static int cpu_ti_action_is_suspended(surf_action_t action)
 656 {
 657   return (((surf_action_cpu_ti_t) action)->suspended == 1);
 658 }
 659
 660 static void cpu_ti_action_set_max_duration(surf_action_t action,
 661                                            double duration)
 662 {
 663   surf_action_cpu_ti_t ACT = (surf_action_cpu_ti_t) action;
 664   double min_finish;
 665
 666   XBT_IN2("(%p,%g)", action, duration);
 667
 668   action->max_duration = duration;
 669
 670   if (duration >= 0)
 671     min_finish =
 672         (action->start + action->max_duration) <
 673         action->finish ? (action->start +
 674                           action->max_duration) : action->finish;
 675   else
 676     min_finish = action->finish;
 677
 678 /* add in action heap */
 679   if (ACT->index_heap >= 0) {
 680     surf_action_cpu_ti_t heap_act =
 681         xbt_heap_remove(cpu_ti_action_heap, ACT->index_heap);
 682     if (heap_act != ACT)
 683       DIE_IMPOSSIBLE;
 684   }
 685   xbt_heap_push(cpu_ti_action_heap, ACT, min_finish);
 686
 687   XBT_OUT;
 688 }
 689
 690 static void cpu_ti_action_set_priority(surf_action_t action,
 691                                        double priority)
 692 {
 693   XBT_IN2("(%p,%g)", action, priority);
 694   action->priority = priority;
 695   xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
 696   XBT_OUT;
 697 }
 698
 699 static double cpu_ti_action_get_remains(surf_action_t action)
 700 {
 701   XBT_IN1("(%p)", action);
 702   cpu_ti_update_remaining_amount((cpu_ti_t)
 703                                  ((surf_action_cpu_ti_t) action)->cpu,
 704                                  surf_get_clock());
 705   return action->remains;
 706   XBT_OUT;
 707 }
 708
 709 static e_surf_resource_state_t cpu_ti_get_state(void *cpu)
 710 {
 711   return ((cpu_ti_t) cpu)->state_current;
 712 }
 713
 714 static double cpu_ti_get_speed(void *cpu, double load)
 715 {
 716   return load * (((cpu_ti_t) cpu)->power_peak);
 717 }
 718
 719 /**
 720 * \brief Auxiliary function to update the CPU power scale.
 721 *
 722 *       This function uses the trace structure to return the power scale at the determined time a.
 723 * \param trace          Trace structure to search the updated power scale
 724 * \param a                              Time
 725 * \return CPU power scale
 726 */
 727 static double surf_cpu_ti_get_power_scale(surf_cpu_ti_tgmr_t trace,
 728                                           double a)
 729 {
 730   double reduced_a;
 731   int point;
 732   s_tmgr_event_t val;
 733
 734   reduced_a = a - floor(a / trace->last_time) * trace->last_time;
 735   point =
 736       surf_cpu_ti_binary_search(trace->trace->time_points, reduced_a, 0,
 737                                 trace->trace->nb_points - 1);
 738   xbt_dynar_get_cpy(trace->power_trace->event_list, 0, &val);
 739   return val.value;
 740 }
 741
 742 static double cpu_ti_get_available_speed(void *cpu)
 743 {
 744   cpu_ti_t CPU = cpu;
 745   CPU->power_scale =
 746       surf_cpu_ti_get_power_scale(CPU->avail_trace, surf_get_clock());
 747 /* number between 0 and 1 */
 748   return CPU->power_scale;
 749 }
 750
 751 static void cpu_ti_create_resource(char *name, double power_peak,
 752                                    double power_scale,
 753                                    tmgr_trace_t power_trace,
 754                                    int core,
 755                                    e_surf_resource_state_t state_initial,
 756                                    tmgr_trace_t state_trace,
 757                                    xbt_dict_t cpu_properties)
 758 {
 759         xbt_assert0(core==1,"Multi-core not handled with this model yet");
 760   cpu_ti_new(name, power_peak, power_scale, power_trace, core,
 761              state_initial, state_trace, cpu_properties);
 762 }
 763
 764 static void cpu_ti_finalize(void)
 765 {
 766   void *cpu;
 767   xbt_dict_cursor_t cursor;
 768   char *key;
 769   xbt_dict_foreach(surf_model_resource_set(surf_cpu_model), cursor, key,
 770                    cpu) {
 771     cpu_ti_t CPU = cpu;
 772     xbt_swag_free(CPU->action_set);
 773     surf_cpu_ti_free_tmgr(CPU->avail_trace);
 774   }
 775
 776   surf_model_exit(surf_cpu_model);
 777   surf_cpu_model = NULL;
 778
 779   xbt_swag_free
 780       (cpu_ti_running_action_set_that_does_not_need_being_checked);
 781   xbt_swag_free(cpu_ti_modified_cpu);
 782   cpu_ti_running_action_set_that_does_not_need_being_checked = NULL;
 783   xbt_heap_free(cpu_ti_action_heap);
 784 }
 785
 786 static void surf_cpu_ti_model_init_internal(void)
 787 {
 788   s_surf_action_t action;
 789   s_cpu_ti_t cpu;
 790
 791   surf_cpu_model = surf_model_init();
 792
 793   cpu_ti_running_action_set_that_does_not_need_being_checked =
 794       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 795
 796   cpu_ti_modified_cpu =
 797       xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
 798
 799   surf_cpu_model->name = "CPU_TI";
 800
 801   surf_cpu_model->action_unref = cpu_ti_action_unref;
 802   surf_cpu_model->action_cancel = cpu_ti_action_cancel;
 803   surf_cpu_model->action_state_set = cpu_ti_action_state_set;
 804
 805   surf_cpu_model->model_private->resource_used = cpu_ti_resource_used;
 806   surf_cpu_model->model_private->share_resources = cpu_ti_share_resources;
 807   surf_cpu_model->model_private->update_actions_state =
 808       cpu_ti_update_actions_state;
 809   surf_cpu_model->model_private->update_resource_state =
 810       cpu_ti_update_resource_state;
 811   surf_cpu_model->model_private->finalize = cpu_ti_finalize;
 812
 813   surf_cpu_model->suspend = cpu_ti_action_suspend;
 814   surf_cpu_model->resume = cpu_ti_action_resume;
 815   surf_cpu_model->is_suspended = cpu_ti_action_is_suspended;
 816   surf_cpu_model->set_max_duration = cpu_ti_action_set_max_duration;
 817   surf_cpu_model->set_priority = cpu_ti_action_set_priority;
 818   surf_cpu_model->get_remains = cpu_ti_action_get_remains;
 819
 820   surf_cpu_model->extension.cpu.execute = cpu_ti_execute;
 821   surf_cpu_model->extension.cpu.sleep = cpu_ti_action_sleep;
 822
 823   surf_cpu_model->extension.cpu.get_state = cpu_ti_get_state;
 824   surf_cpu_model->extension.cpu.get_speed = cpu_ti_get_speed;
 825   surf_cpu_model->extension.cpu.get_available_speed =
 826       cpu_ti_get_available_speed;
 827   surf_cpu_model->extension.cpu.create_resource = cpu_ti_create_resource;
 828   surf_cpu_model->extension.cpu.add_traces = add_traces_cpu_ti;
 829
 830   cpu_ti_action_heap = xbt_heap_new(8, NULL);
 831   xbt_heap_set_update_callback(cpu_ti_action_heap,
 832                                cpu_ti_action_update_index_heap);
 833
 834 }
 835
 836 void surf_cpu_model_init_ti(const char *filename)
 837 {
 838   if (surf_cpu_model)
 839     return;
 840   surf_cpu_ti_model_init_internal();
 841   cpu_ti_define_callbacks(filename);
 842   xbt_dynar_push(model_list, &surf_cpu_model);
 843 }
 844
 845
 846 /**
 847 * \brief Integrate trace
 848 *
 849 * Wrapper around surf_cpu_integrate_trace_simple() to get
 850 * the cyclic effect.
 851 *
 852 * \param trace Trace structure.
 853 * \param a                      Begin of interval
 854 * \param b                      End of interval
 855 * \return the integrate value. -1 if an error occurs.
 856 */
 857 static double surf_cpu_ti_integrate_trace(surf_cpu_ti_tgmr_t trace,
 858                                           double a, double b)
 859 {
 860   double first_chunk;
 861   double middle_chunk;
 862   double last_chunk;
 863   int a_index, b_index;
 864
 865   if ((a < 0.0) || (a > b)) {
 866     CRITICAL2
 867         ("Error, invalid integration interval [%.2f,%.2f]. You probably have a task executing with negative computation amount. Check your code.",
 868          a, b);
 869     xbt_abort();
 870   }
 871   if (a == b)
 872     return 0.0;
 873
 874   if (trace->type == TRACE_FIXED) {
 875     return ((b - a) * trace->value);
 876   }
 877
 878   if (ceil(a / trace->last_time) == a / trace->last_time)
 879     a_index = 1 + (int) (ceil(a / trace->last_time));
 880   else
 881     a_index = (int) (ceil(a / trace->last_time));
 882
 883   b_index = (int) (floor(b / trace->last_time));
 884
 885   if (a_index > b_index) {      /* Same chunk */
 886     return surf_cpu_ti_integrate_trace_simple(trace->trace,
 887                                               a - (a_index -
 888                                                    1) * trace->last_time,
 889                                               b -
 890                                               (b_index) *
 891                                               trace->last_time);
 892   }
 893
 894   first_chunk = surf_cpu_ti_integrate_trace_simple(trace->trace,
 895                                                    a - (a_index -
 896                                                         1) *
 897                                                    trace->last_time,
 898                                                    trace->last_time);
 899   middle_chunk = (b_index - a_index) * trace->total;
 900   last_chunk = surf_cpu_ti_integrate_trace_simple(trace->trace,
 901                                                   0.0,
 902                                                   b -
 903                                                   (b_index) *
 904                                                   trace->last_time);
 905
 906   DEBUG3("first_chunk=%.2f  middle_chunk=%.2f  last_chunk=%.2f\n",
 907          first_chunk, middle_chunk, last_chunk);
 908
 909   return (first_chunk + middle_chunk + last_chunk);
 910 }
 911
 912 /**
 913  * \brief Auxiliary function to calculate the integral between a and b.
 914  *              It simply calculates the integral at point a and b and returns the difference
 915  *      between them.
 916  * \param trace         Trace structure
 917  * \param a                             Initial point
 918  * \param b     Final point
 919  * \return      Integral
 920 */
 921 static double surf_cpu_ti_integrate_trace_simple(surf_cpu_ti_trace_t trace,
 922                                                  double a, double b)
 923 {
 924   return surf_cpu_ti_integrate_trace_simple_point(trace,
 925                                                   b) -
 926       surf_cpu_ti_integrate_trace_simple_point(trace, a);
 927 }
 928
 929 /**
 930  * \brief Auxiliary function to calculate the integral at point a.
 931  * \param trace         Trace structure
 932  * \param a                             point
 933  * \return      Integral
 934 */
 935 static double surf_cpu_ti_integrate_trace_simple_point(surf_cpu_ti_trace_t
 936                                                        trace, double a)
 937 {
 938   double integral = 0;
 939   int ind;
 940   double a_aux = a;
 941   ind =
 942       surf_cpu_ti_binary_search(trace->time_points, a, 0,
 943                                 trace->nb_points - 1);
 944   integral += trace->integral[ind];
 945   DEBUG7
 946       ("a %lf ind %d integral %lf ind + 1 %lf ind %lf time +1 %lf time %lf",
 947        a, ind, integral, trace->integral[ind + 1], trace->integral[ind],
 948        trace->time_points[ind + 1], trace->time_points[ind]);
 949   double_update(&a_aux, trace->time_points[ind]);
 950   if (a_aux > 0)
 951     integral +=
 952         ((trace->integral[ind + 1] -
 953           trace->integral[ind]) / (trace->time_points[ind + 1] -
 954                                    trace->time_points[ind])) * (a -
 955                                                                 trace->
 956                                                                 time_points
 957                                                                 [ind]);
 958   DEBUG2("Integral a %lf = %lf", a, integral);
 959
 960   return integral;
 961 }
 962
 963 /**
 964 * \brief Calculate the time needed to execute "amount" on cpu.
 965 *
 966 * Here, amount can span multiple trace periods
 967 *
 968 * \param trace  CPU trace structure
 969 * \param a                              Initial time
 970 * \param amount Amount to be executed
 971 * \return       End time
 972 */
 973 static double surf_cpu_ti_solve_trace(surf_cpu_ti_tgmr_t trace, double a,
 974                                       double amount)
 975 {
 976   int quotient;
 977   double reduced_b;
 978   double reduced_amount;
 979   double reduced_a;
 980   double b;
 981
 982 /* Fix very small negative numbers */
 983   if ((a < 0.0) && (a > -EPSILON)) {
 984     a = 0.0;
 985   }
 986   if ((amount < 0.0) && (amount > -EPSILON)) {
 987     amount = 0.0;
 988   }
 989
 990 /* Sanity checks */
 991   if ((a < 0.0) || (amount < 0.0)) {
 992     CRITICAL2
 993         ("Error, invalid parameters [a = %.2f, amount = %.2f]. You probably have a task executing with negative computation amount. Check your code.",
 994          a, amount);
 995     xbt_abort();
 996   }
 997
 998 /* At this point, a and amount are positive */
 999
1000   if (amount < EPSILON)
1001     return a;
1002
1003 /* Is the trace fixed ? */
1004   if (trace->type == TRACE_FIXED) {
1005     return (a + (amount / trace->value));
1006   }
1007
1008   DEBUG2("amount %lf total %lf", amount, trace->total);
1009 /* Reduce the problem to one where amount <= trace_total */
1010   quotient = (int) (floor(amount / trace->total));
1011   reduced_amount = (trace->total) * ((amount / trace->total) -
1012                                      floor(amount / trace->total));
1013   reduced_a = a - (trace->last_time) * (int) (floor(a / trace->last_time));
1014
1015   DEBUG3("Quotient: %d reduced_amount: %lf reduced_a: %lf", quotient,
1016          reduced_amount, reduced_a);
1017
1018 /* Now solve for new_amount which is <= trace_total */
1019 /*
1020          fprintf(stderr,"reduced_a = %.2f\n",reduced_a);
1021          fprintf(stderr,"reduced_amount = %.2f\n",reduced_amount);
1022  */
1023   reduced_b =
1024       surf_cpu_ti_solve_trace_somewhat_simple(trace, reduced_a,
1025                                               reduced_amount);
1026
1027 /* Re-map to the original b and amount */
1028   b = (trace->last_time) * (int) (floor(a / trace->last_time)) +
1029       (quotient * trace->last_time) + reduced_b;
1030   return b;
1031 }
1032
1033 /**
1034 * \brief Auxiliary function to solve integral
1035 *
1036 * Here, amount is <= trace->total
1037 * and a <=trace->last_time
1038 *
1039 */
1040 static double surf_cpu_ti_solve_trace_somewhat_simple(surf_cpu_ti_tgmr_t
1041                                                       trace, double a,
1042                                                       double amount)
1043 {
1044   double amount_till_end;
1045   double b;
1046
1047   DEBUG2("Solve integral: [%.2f, amount=%.2f]", a, amount);
1048   amount_till_end =
1049       surf_cpu_ti_integrate_trace(trace, a, trace->last_time);
1050 /*
1051          fprintf(stderr,"amount_till_end=%.2f\n",amount_till_end);
1052  */
1053
1054   if (amount_till_end > amount) {
1055     b = surf_cpu_ti_solve_trace_simple(trace->trace, a, amount);
1056   } else {
1057     b = trace->last_time +
1058         surf_cpu_ti_solve_trace_simple(trace->trace, 0.0,
1059                                        amount - amount_till_end);
1060   }
1061   return b;
1062 }
1063
1064 /**
1065  * \brief Auxiliary function to solve integral.
1066  *      It returns the date when the requested amount of flops is available
1067  * \param trace         Trace structure
1068  * \param a                             Initial point
1069  * \param amount        Amount of flops
1070  * \return The date when amount is available.
1071 */
1072 static double surf_cpu_ti_solve_trace_simple(surf_cpu_ti_trace_t trace,
1073                                              double a, double amount)
1074 {
1075   double integral_a;
1076   int ind;
1077   double time;
1078   integral_a = surf_cpu_ti_integrate_trace_simple_point(trace, a);
1079   ind =
1080       surf_cpu_ti_binary_search(trace->integral, integral_a + amount, 0,
1081                                 trace->nb_points - 1);
1082   time = trace->time_points[ind];
1083   time +=
1084       (integral_a + amount -
1085        trace->integral[ind]) / ((trace->integral[ind + 1] -
1086                                  trace->integral[ind]) /
1087                                 (trace->time_points[ind + 1] -
1088                                  trace->time_points[ind]));
1089
1090   return time;
1091 }
1092
1093 /**
1094  * \brief Binary search in array.
1095  *      It returns the first point of the interval in which "a" is.
1096  * \param array         Array
1097  * \param a                             Value to search
1098  * \param low           Low bound to search in array
1099  * \param high          Upper bound to search in array
1100  * \return Index of point
1101 */
1102 static int surf_cpu_ti_binary_search(double *array, double a, int low,
1103                                      int high)
1104 {
1105   int mid = low + (high - low) / 2;
1106   DEBUG5("a %lf low %d high %d mid %d value %lf", a, low, high, mid,
1107          array[mid]);
1108   /* a == array[mid] */
1109   if (array[mid] == a)
1110     return mid;
1111   /* a is between mid and mid+1 */
1112   if (array[mid] < a && array[mid + 1] > a)
1113     return mid;
1114
1115   if (array[mid] < a)
1116     return surf_cpu_ti_binary_search(array, a, mid + 1, high);
1117   else
1118     return surf_cpu_ti_binary_search(array, a, low, mid - 1);
1119 }