src/surf/cpu_ti.c

   1
   2 /*      $Id$     */
   3
   4 /* Copyright (c) 2004 Arnaud Legrand. All rights reserved.                  */
   5
   6 /* This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the license (GNU LGPL) which comes with this package. */
   8
   9 /*
  10         commit: e2d6799c4182f00443b3013aadb1c2412372460f
  11         This commit retrieves the old implementation of CPU_TI with multi-levels.
  12 */
  13
  14 #include "surf_private.h"
  15 #include "trace_mgr_private.h"
  16 #include "cpu_ti_private.h"
  17 #include "xbt/heap.h"
  18
  19
  20 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_ti, surf,
  21                                 "Logging specific to the SURF CPU TRACE INTEGRATION module");
  22
  23
  24 static xbt_swag_t running_action_set_that_does_not_need_being_checked = NULL;
  25 static xbt_swag_t modified_cpu = NULL;
  26 static xbt_heap_t action_heap;
  27
  28 /* prototypes of new trace functions */
  29 static double surf_cpu_integrate_trace(surf_cpu_ti_tgmr_t trace, double a,
  30                                        double b);
  31
  32
  33 static double surf_cpu_solve_trace(surf_cpu_ti_tgmr_t trace, double a,
  34                                    double amount);
  35 static double surf_cpu_solve_trace_somewhat_simple(surf_cpu_ti_tgmr_t trace,
  36                                                    double a, double amount);
  37
  38 static void surf_cpu_free_tmgr(surf_cpu_ti_tgmr_t trace);
  39
  40 static double surf_cpu_integrate_trace_simple(surf_cpu_ti_trace_t trace,
  41                                               double a, double b);
  42 static double surf_cpu_integrate_trace_simple_point(surf_cpu_ti_trace_t trace,
  43                                                     double a);
  44 static double surf_cpu_solve_trace_simple(surf_cpu_ti_trace_t trace, double a,
  45                                           double amount);
  46 static int surf_cpu_binary_search(double *array, double a, int low, int high);
  47 /* end prototypes */
  48
  49 static void surf_cpu_free_trace(surf_cpu_ti_trace_t trace)
  50 {
  51   if (trace->time_points)
  52     xbt_free(trace->time_points);
  53   if (trace->integral)
  54     xbt_free(trace->integral);
  55   xbt_free(trace);
  56 }
  57
  58 static void surf_cpu_free_tmgr(surf_cpu_ti_tgmr_t trace)
  59 {
  60   if (trace->trace)
  61     surf_cpu_free_trace(trace->trace);
  62   xbt_free(trace);
  63 }
  64
  65 static surf_cpu_ti_trace_t surf_cpu_trace_new(tmgr_trace_t power_trace)
  66 {
  67   surf_cpu_ti_trace_t trace;
  68   s_tmgr_event_t val;
  69   unsigned int cpt;
  70   double integral = 0;
  71   double time = 0;
  72   int i = 0;
  73   trace = xbt_new0(s_surf_cpu_ti_trace_t, 1);
  74   trace->time_points =
  75     xbt_malloc0(sizeof(double) *
  76                 (xbt_dynar_length(power_trace->event_list) + 1));
  77   trace->integral =
  78     xbt_malloc0(sizeof(double) *
  79                 (xbt_dynar_length(power_trace->event_list) + 1));
  80   trace->nb_points = xbt_dynar_length(power_trace->event_list);
  81   xbt_dynar_foreach(power_trace->event_list, cpt, val) {
  82     trace->time_points[i] = time;
  83     trace->integral[i] = integral;
  84     integral += val.delta * val.value;
  85     time += val.delta;
  86     i++;
  87   }
  88   trace->time_points[i] = time;
  89   trace->integral[i] = integral;
  90   return trace;
  91 }
  92
  93 /**
  94 * \brief Creates a new integration trace from a tmgr_trace_t
  95 *
  96 * \param        power_trace             CPU availability trace
  97 * \param        value                                   Percentage of CPU power available (useful to fixed tracing)
  98 * \param        spacing                         Initial spacing
  99 * \return       Integration trace structure
 100 */
 101 static surf_cpu_ti_tgmr_t cpu_ti_parse_trace(tmgr_trace_t power_trace,
 102                                              double value)
 103 {
 104   surf_cpu_ti_tgmr_t trace;
 105   double total_time = 0.0;
 106   s_tmgr_event_t val;
 107   unsigned int cpt;
 108   trace = xbt_new0(s_surf_cpu_ti_tgmr_t, 1);
 109
 110 /* no availability file, fixed trace */
 111   if (!power_trace) {
 112     trace->type = TRACE_FIXED;
 113     trace->value = value;
 114     DEBUG1("No availabily trace. Constant value = %lf", value);
 115     return trace;
 116   }
 117
 118   /* only one point available, fixed trace */
 119   if (xbt_dynar_length(power_trace->event_list) == 1) {
 120     xbt_dynar_get_cpy(power_trace->event_list, 0, &val);
 121     trace->type = TRACE_FIXED;
 122     trace->value = val.value;
 123     return trace;
 124   }
 125
 126   trace->type = TRACE_DYNAMIC;
 127   trace->power_trace = power_trace;
 128
 129   /* count the total time of trace file */
 130   xbt_dynar_foreach(power_trace->event_list, cpt, val) {
 131     total_time += val.delta;
 132   }
 133   trace->trace = surf_cpu_trace_new(power_trace);
 134   trace->last_time = total_time;
 135   trace->total = surf_cpu_integrate_trace_simple(trace->trace, 0, total_time);
 136
 137   DEBUG2("Total integral %lf, last_time %lf ",
 138          trace->total, trace->last_time);
 139
 140   return trace;
 141 }
 142
 143
 144 static cpu_ti_t cpu_new(char *name, double power_peak,
 145                         double power_scale,
 146                         tmgr_trace_t power_trace,
 147                         e_surf_resource_state_t state_initial,
 148                         tmgr_trace_t state_trace, xbt_dict_t cpu_properties)
 149 {
 150   tmgr_trace_t empty_trace;
 151   s_tmgr_event_t val;
 152   cpu_ti_t cpu = xbt_new0(s_cpu_ti_t, 1);
 153   s_surf_action_cpu_ti_t ti_action;
 154   xbt_assert1(!surf_model_resource_by_name(surf_cpu_model, name),
 155               "Host '%s' declared several times in the platform file", name);
 156   cpu->action_set = xbt_swag_new(xbt_swag_offset(ti_action, cpu_list_hookup));
 157   cpu->generic_resource.model = surf_cpu_model;
 158   cpu->generic_resource.name = name;
 159   cpu->generic_resource.properties = cpu_properties;
 160   cpu->power_peak = power_peak;
 161   xbt_assert0(cpu->power_peak > 0, "Power has to be >0");
 162   DEBUG1("power scale %lf", power_scale);
 163   cpu->power_scale = power_scale;
 164   cpu->avail_trace = cpu_ti_parse_trace(power_trace, power_scale);
 165   cpu->state_current = state_initial;
 166   if (state_trace)
 167     cpu->state_event =
 168       tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
 169   if (power_trace && xbt_dynar_length(power_trace->event_list) > 1) {
 170     /* add a fake trace event if periodicity == 0 */
 171     xbt_dynar_get_cpy(power_trace->event_list,
 172                       xbt_dynar_length(power_trace->event_list) - 1, &val);
 173     if (val.delta == 0) {
 174       empty_trace = tmgr_empty_trace_new();
 175       cpu->power_event =
 176         tmgr_history_add_trace(history, empty_trace,
 177                                cpu->avail_trace->last_time, 0, cpu);
 178     }
 179   }
 180   xbt_dict_set(surf_model_resource_set(surf_cpu_model), name, cpu,
 181                surf_resource_free);
 182
 183   return cpu;
 184 }
 185
 186
 187 static void parse_cpu_init(void)
 188 {
 189   double power_peak = 0.0;
 190   double power_scale = 0.0;
 191   tmgr_trace_t power_trace = NULL;
 192   e_surf_resource_state_t state_initial = SURF_RESOURCE_OFF;
 193   tmgr_trace_t state_trace = NULL;
 194
 195   power_peak = get_cpu_power(A_surfxml_host_power);
 196   surf_parse_get_double(&power_scale, A_surfxml_host_availability);
 197   power_trace = tmgr_trace_new(A_surfxml_host_availability_file);
 198
 199   xbt_assert0((A_surfxml_host_state == A_surfxml_host_state_ON) ||
 200               (A_surfxml_host_state == A_surfxml_host_state_OFF),
 201               "Invalid state");
 202   if (A_surfxml_host_state == A_surfxml_host_state_ON)
 203     state_initial = SURF_RESOURCE_ON;
 204   if (A_surfxml_host_state == A_surfxml_host_state_OFF)
 205     state_initial = SURF_RESOURCE_OFF;
 206   state_trace = tmgr_trace_new(A_surfxml_host_state_file);
 207
 208   current_property_set = xbt_dict_new();
 209   cpu_new(xbt_strdup(A_surfxml_host_id), power_peak, power_scale,
 210           power_trace, state_initial, state_trace, current_property_set);
 211
 212 }
 213
 214 static void add_traces_cpu(void)
 215 {
 216   xbt_dict_cursor_t cursor = NULL;
 217   char *trace_name, *elm;
 218
 219   static int called = 0;
 220
 221   if (called)
 222     return;
 223   called = 1;
 224
 225 /* connect all traces relative to hosts */
 226   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 227     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 228     cpu_ti_t cpu = surf_model_resource_by_name(surf_cpu_model, elm);
 229
 230     xbt_assert1(cpu, "Host %s undefined", elm);
 231     xbt_assert1(trace, "Trace %s undefined", trace_name);
 232
 233     if (cpu->state_event) {
 234       DEBUG1("Trace already configured for this CPU(%s), ignoring it", elm);
 235       continue;
 236     }
 237     DEBUG2("Add state trace: %s to CPU(%s)", trace_name, elm);
 238     cpu->state_event = tmgr_history_add_trace(history, trace, 0.0, 0, cpu);
 239   }
 240
 241   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 242     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 243     cpu_ti_t cpu = surf_model_resource_by_name(surf_cpu_model, elm);
 244
 245     xbt_assert1(cpu, "Host %s undefined", elm);
 246     xbt_assert1(trace, "Trace %s undefined", trace_name);
 247
 248     DEBUG2("Add power trace: %s to CPU(%s)", trace_name, elm);
 249     if (cpu->avail_trace)
 250       surf_cpu_free_tmgr(cpu->avail_trace);
 251
 252     cpu->avail_trace = cpu_ti_parse_trace(trace, cpu->power_scale);
 253
 254     /* add a fake trace event if periodicity == 0 */
 255     if (trace && xbt_dynar_length(trace->event_list) > 1) {
 256       s_tmgr_event_t val;
 257       xbt_dynar_get_cpy(trace->event_list,
 258                         xbt_dynar_length(trace->event_list) - 1, &val);
 259       if (val.delta == 0) {
 260         tmgr_trace_t empty_trace;
 261         empty_trace = tmgr_empty_trace_new();
 262         cpu->power_event =
 263           tmgr_history_add_trace(history, empty_trace,
 264                                  cpu->avail_trace->last_time, 0, cpu);
 265       }
 266     }
 267   }
 268 }
 269
 270 static void define_callbacks(const char *file)
 271 {
 272   surf_parse_reset_parser();
 273   surfxml_add_callback(STag_surfxml_host_cb_list, parse_cpu_init);
 274   surfxml_add_callback(ETag_surfxml_platform_cb_list, &add_traces_cpu);
 275 }
 276
 277 static int resource_used(void *resource_id)
 278 {
 279   cpu_ti_t cpu = resource_id;
 280   return xbt_swag_size(cpu->action_set);
 281 }
 282
 283 static int action_unref(surf_action_t action)
 284 {
 285   action->refcount--;
 286   if (!action->refcount) {
 287     xbt_swag_remove(action, action->state_set);
 288     /* remove from action_set */
 289     xbt_swag_remove(action, ACTION_GET_CPU(action)->action_set);
 290     /* remove from heap */
 291     xbt_heap_remove(action_heap, ((surf_action_cpu_ti_t) action)->index_heap);
 292     xbt_swag_insert(ACTION_GET_CPU(action), modified_cpu);
 293     free(action);
 294     return 1;
 295   }
 296   return 0;
 297 }
 298
 299 static void action_cancel(surf_action_t action)
 300 {
 301   surf_action_state_set(action, SURF_ACTION_FAILED);
 302   xbt_heap_remove(action_heap, ((surf_action_cpu_ti_t) action)->index_heap);
 303   xbt_swag_insert(ACTION_GET_CPU(action), modified_cpu);
 304   return;
 305 }
 306
 307 static void cpu_action_state_set(surf_action_t action,
 308                                  e_surf_action_state_t state)
 309 {
 310   surf_action_state_set(action, state);
 311   xbt_swag_insert(ACTION_GET_CPU(action), modified_cpu);
 312   return;
 313 }
 314
 315 /**
 316 * \brief Update the remaining amount of actions
 317 *
 318 * \param        cpu             Cpu on which the actions are running
 319 * \param        now             Current time
 320 */
 321 static void cpu_update_remaining_amount(cpu_ti_t cpu, double now)
 322 {
 323 #define GENERIC_ACTION(action) action->generic_action
 324   double area_total;
 325   surf_action_cpu_ti_t action;
 326
 327 /* already updated */
 328   if (cpu->last_update >= now)
 329     return;
 330
 331 /* calcule the surface */
 332   area_total =
 333     surf_cpu_integrate_trace(cpu->avail_trace, cpu->last_update,
 334                              now) * cpu->power_peak;
 335   DEBUG2("Flops total: %lf, Last update %lf", area_total, cpu->last_update);
 336
 337   xbt_swag_foreach(action, cpu->action_set) {
 338     /* action not running, skip it */
 339     if (GENERIC_ACTION(action).state_set !=
 340         surf_cpu_model->states.running_action_set)
 341       continue;
 342
 343     /* bogus priority, skip it */
 344     if (GENERIC_ACTION(action).priority <= 0)
 345       continue;
 346
 347     /* action suspended, skip it */
 348     if (action->suspended != 0)
 349       continue;
 350
 351     /* action don't need update */
 352     if (GENERIC_ACTION(action).start >= now)
 353       continue;
 354
 355     /* skip action that are finishing now */
 356     if (GENERIC_ACTION(action).finish >= 0
 357         && GENERIC_ACTION(action).finish <= now)
 358       continue;
 359
 360     /* update remaining */
 361     double_update(&(GENERIC_ACTION(action).remains),
 362                   area_total / (cpu->sum_priority *
 363                                 GENERIC_ACTION(action).priority));
 364     DEBUG2("Update remaining action(%p) remaining %lf", action,
 365            GENERIC_ACTION(action).remains);
 366   }
 367   cpu->last_update = now;
 368 #undef GENERIC_ACTION
 369 }
 370
 371 /**
 372 * \brief Update the finish date of action if necessary
 373 *
 374 * \param        cpu             Cpu on which the actions are running
 375 * \param        now             Current time
 376 */
 377 static void cpu_update_action_finish_date(cpu_ti_t cpu, double now)
 378 {
 379 #define GENERIC_ACTION(action) action->generic_action
 380   surf_action_cpu_ti_t action;
 381   double sum_priority = 0.0, total_area, min_finish = -1;
 382
 383 /* update remaning amount of actions */
 384   cpu_update_remaining_amount(cpu, now);
 385
 386   xbt_swag_foreach(action, cpu->action_set) {
 387     /* action not running, skip it */
 388     if (GENERIC_ACTION(action).state_set !=
 389         surf_cpu_model->states.running_action_set)
 390       continue;
 391
 392     /* bogus priority, skip it */
 393     if (GENERIC_ACTION(action).priority <= 0)
 394       continue;
 395
 396     /* action suspended, skip it */
 397     if (action->suspended != 0)
 398       continue;
 399
 400     sum_priority += 1.0 / GENERIC_ACTION(action).priority;
 401   }
 402   cpu->sum_priority = sum_priority;
 403
 404   xbt_swag_foreach(action, cpu->action_set) {
 405     /* action not running, skip it */
 406     if (GENERIC_ACTION(action).state_set !=
 407         surf_cpu_model->states.running_action_set)
 408       continue;
 409
 410     /* verify if the action is really running on cpu */
 411     if (action->suspended == 0 && GENERIC_ACTION(action).priority > 0) {
 412       /* total area needed to finish the action. Used in trace integration */
 413       total_area =
 414         (GENERIC_ACTION(action).remains) * sum_priority *
 415         GENERIC_ACTION(action).priority;
 416
 417       total_area /= cpu->power_peak;
 418
 419       GENERIC_ACTION(action).finish =
 420         surf_cpu_solve_trace(cpu->avail_trace, now, total_area);
 421       /* verify which event will happen before (max_duration or finish time) */
 422       if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION) &&
 423           (GENERIC_ACTION(action).start +
 424            GENERIC_ACTION(action).max_duration <
 425            GENERIC_ACTION(action).finish))
 426         min_finish = GENERIC_ACTION(action).start +
 427           GENERIC_ACTION(action).max_duration;
 428       else
 429         min_finish = GENERIC_ACTION(action).finish;
 430     } else {
 431       /* put the max duration time on heap */
 432       if (GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 433         min_finish =
 434           (GENERIC_ACTION(action).start +
 435            GENERIC_ACTION(action).max_duration);
 436     }
 437     /* add in action heap */
 438     DEBUG2("action(%p) index %d", action, action->index_heap);
 439     if (action->index_heap >= 0) {
 440       surf_action_cpu_ti_t heap_act =
 441         xbt_heap_remove(action_heap, action->index_heap);
 442       if (heap_act != action)
 443         DIE_IMPOSSIBLE;
 444     }
 445     if (min_finish != NO_MAX_DURATION)
 446       xbt_heap_push(action_heap, action, min_finish);
 447
 448     DEBUG5
 449       ("Update finish time: Cpu(%s) Action: %p, Start Time: %lf Finish Time: %lf Max duration %lf",
 450        cpu->generic_resource.name, action, GENERIC_ACTION(action).start,
 451        GENERIC_ACTION(action).finish, GENERIC_ACTION(action).max_duration);
 452   }
 453 /* remove from modified cpu */
 454   xbt_swag_remove(cpu, modified_cpu);
 455 #undef GENERIC_ACTION
 456 }
 457
 458 static double share_resources(double now)
 459 {
 460   cpu_ti_t cpu, cpu_next;
 461   double min_action_duration = -1;
 462
 463 /* iterates over modified cpus to update share resources */
 464   xbt_swag_foreach_safe(cpu, cpu_next, modified_cpu) {
 465     cpu_update_action_finish_date(cpu, now);
 466   }
 467 /* get the min next event if heap not empty */
 468   if (xbt_heap_size(action_heap) > 0)
 469     min_action_duration = xbt_heap_maxkey(action_heap) - now;
 470
 471   DEBUG1("Share resources, min next event date: %lf", min_action_duration);
 472
 473   return min_action_duration;
 474 }
 475
 476 static void update_actions_state(double now, double delta)
 477 {
 478 #define GENERIC_ACTION(action) action->generic_action
 479   surf_action_cpu_ti_t action;
 480   while ((xbt_heap_size(action_heap) > 0)
 481          && (xbt_heap_maxkey(action_heap) <= now)) {
 482     action = xbt_heap_pop(action_heap);
 483     DEBUG1("Action %p: finish", action);
 484     GENERIC_ACTION(action).finish = surf_get_clock();
 485     /* set the remains to 0 due to precision problems when updating the remaining amount */
 486     GENERIC_ACTION(action).remains = 0;
 487     cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 488     /* update remaining amout of all actions */
 489     cpu_update_remaining_amount(action->cpu, surf_get_clock());
 490   }
 491 #undef GENERIC_ACTION
 492 }
 493
 494 static void update_resource_state(void *id,
 495                                   tmgr_trace_event_t event_type,
 496                                   double value, double date)
 497 {
 498   cpu_ti_t cpu = id;
 499   surf_action_cpu_ti_t action;
 500
 501   if (event_type == cpu->power_event) {
 502     tmgr_trace_t power_trace;
 503     surf_cpu_ti_tgmr_t trace;
 504     s_tmgr_event_t val;
 505
 506     DEBUG3("Finish trace date: %lf value %lf date %lf", surf_get_clock(),
 507            value, date);
 508     /* update remaining of actions and put in modified cpu swag */
 509     cpu_update_remaining_amount(cpu, date);
 510     xbt_swag_insert(cpu, modified_cpu);
 511
 512     power_trace = cpu->avail_trace->power_trace;
 513     xbt_dynar_get_cpy(power_trace->event_list,
 514                       xbt_dynar_length(power_trace->event_list) - 1, &val);
 515     /* free old trace */
 516     surf_cpu_free_tmgr(cpu->avail_trace);
 517     cpu->power_scale = val.value;
 518
 519     trace = xbt_new0(s_surf_cpu_ti_tgmr_t, 1);
 520     trace->type = TRACE_FIXED;
 521     trace->value = val.value;
 522     DEBUG1("value %lf", val.value);
 523
 524     cpu->avail_trace = trace;
 525
 526     if (tmgr_trace_event_free(event_type))
 527       cpu->power_event = NULL;
 528
 529   } else if (event_type == cpu->state_event) {
 530     if (value > 0)
 531       cpu->state_current = SURF_RESOURCE_ON;
 532     else {
 533       cpu->state_current = SURF_RESOURCE_OFF;
 534
 535       /* put all action running on cpu to failed */
 536       xbt_swag_foreach(action, cpu->action_set) {
 537         if (surf_action_state_get((surf_action_t) action) ==
 538             SURF_ACTION_RUNNING
 539             || surf_action_state_get((surf_action_t) action) ==
 540             SURF_ACTION_READY
 541             || surf_action_state_get((surf_action_t) action) ==
 542             SURF_ACTION_NOT_IN_THE_SYSTEM) {
 543           action->generic_action.finish = date;
 544           cpu_action_state_set((surf_action_t) action, SURF_ACTION_FAILED);
 545           if (action->index_heap >= 0) {
 546             surf_action_cpu_ti_t heap_act =
 547               xbt_heap_remove(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     CRITICAL0("Unknown event ! \n");
 558     xbt_abort();
 559   }
 560
 561   return;
 562 }
 563
 564 static surf_action_t execute(void *cpu, double size)
 565 {
 566   surf_action_cpu_ti_t action = NULL;
 567   cpu_ti_t CPU = cpu;
 568
 569   XBT_IN2("(%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, 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 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 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_IN2("(%s,%g)", surf_resource_name(cpu), duration);
 600   action = (surf_action_cpu_ti_t) 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       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 action_suspend(surf_action_t action)
 616 {
 617   XBT_IN1("(%p)", action);
 618   if (((surf_action_cpu_ti_t) action)->suspended != 2) {
 619     ((surf_action_cpu_ti_t) action)->suspended = 1;
 620     xbt_swag_insert(ACTION_GET_CPU(action), modified_cpu);
 621   }
 622   XBT_OUT;
 623 }
 624
 625 static void action_resume(surf_action_t action)
 626 {
 627   XBT_IN1("(%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), modified_cpu);
 631   }
 632   XBT_OUT;
 633 }
 634
 635 static int action_is_suspended(surf_action_t action)
 636 {
 637   return (((surf_action_cpu_ti_t) action)->suspended == 1);
 638 }
 639
 640 static void action_set_max_duration(surf_action_t action, double duration)
 641 {
 642   surf_action_cpu_ti_t ACT = (surf_action_cpu_ti_t) action;
 643   double min_finish;
 644
 645   XBT_IN2("(%p,%g)", action, duration);
 646
 647   action->max_duration = duration;
 648
 649   if (duration >= 0)
 650     min_finish =
 651       (action->start + action->max_duration) <
 652       action->finish ? (action->start +
 653                         action->max_duration) : action->finish;
 654   else
 655     min_finish = action->finish;
 656
 657 /* add in action heap */
 658   if (ACT->index_heap >= 0) {
 659     surf_action_cpu_ti_t heap_act =
 660       xbt_heap_remove(action_heap, ACT->index_heap);
 661     if (heap_act != ACT)
 662       DIE_IMPOSSIBLE;
 663   }
 664   xbt_heap_push(action_heap, ACT, min_finish);
 665
 666   XBT_OUT;
 667 }
 668
 669 static void action_set_priority(surf_action_t action, double priority)
 670 {
 671   XBT_IN2("(%p,%g)", action, priority);
 672   action->priority = priority;
 673   xbt_swag_insert(ACTION_GET_CPU(action), modified_cpu);
 674   XBT_OUT;
 675 }
 676
 677 static double action_get_remains(surf_action_t action)
 678 {
 679   XBT_IN1("(%p)", action);
 680   cpu_update_remaining_amount((cpu_ti_t) ((surf_action_cpu_ti_t) action)->cpu,
 681                               surf_get_clock());
 682   return action->remains;
 683   XBT_OUT;
 684 }
 685
 686 static e_surf_resource_state_t get_state(void *cpu)
 687 {
 688   return ((cpu_ti_t) cpu)->state_current;
 689 }
 690
 691 static double get_speed(void *cpu, double load)
 692 {
 693   return load * (((cpu_ti_t) cpu)->power_peak);
 694 }
 695
 696 /**
 697 * \brief Auxiliary function to update the CPU power scale.
 698 *
 699 *       This function uses the trace structure to return the power scale at the determined time a.
 700 * \param trace          Trace structure to search the updated power scale
 701 * \param a                              Time
 702 * \return CPU power scale
 703 */
 704 static double surf_cpu_get_power_scale(surf_cpu_ti_tgmr_t trace, double a)
 705 {
 706   double reduced_a;
 707   int point;
 708   s_tmgr_event_t val;
 709
 710   reduced_a = a - floor(a / trace->last_time) * trace->last_time;
 711   point =
 712     surf_cpu_binary_search(trace->trace->time_points, reduced_a, 0,
 713                            trace->trace->nb_points - 1);
 714   xbt_dynar_get_cpy(trace->power_trace->event_list, 0, &val);
 715   return val.value;
 716 }
 717
 718 static double get_available_speed(void *cpu)
 719 {
 720   cpu_ti_t CPU = cpu;
 721   CPU->power_scale =
 722     surf_cpu_get_power_scale(CPU->avail_trace, surf_get_clock());
 723 /* number between 0 and 1 */
 724   return CPU->power_scale;
 725 }
 726
 727 static void finalize(void)
 728 {
 729   void *cpu;
 730   xbt_dict_cursor_t cursor;
 731   char *key;
 732   xbt_dict_foreach(surf_model_resource_set(surf_cpu_model), cursor, key, cpu) {
 733     cpu_ti_t CPU = cpu;
 734     xbt_swag_free(CPU->action_set);
 735     surf_cpu_free_tmgr(CPU->avail_trace);
 736   }
 737
 738   surf_model_exit(surf_cpu_model);
 739   surf_cpu_model = NULL;
 740
 741   xbt_swag_free(running_action_set_that_does_not_need_being_checked);
 742   xbt_swag_free(modified_cpu);
 743   running_action_set_that_does_not_need_being_checked = NULL;
 744   xbt_heap_free(action_heap);
 745 }
 746
 747 static void surf_cpu_model_init_internal(void)
 748 {
 749   s_surf_action_t action;
 750   s_cpu_ti_t cpu;
 751
 752   surf_cpu_model = surf_model_init();
 753
 754   running_action_set_that_does_not_need_being_checked =
 755     xbt_swag_new(xbt_swag_offset(action, state_hookup));
 756
 757   modified_cpu = xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
 758
 759   surf_cpu_model->name = "CPU_TI";
 760
 761   surf_cpu_model->action_unref = action_unref;
 762   surf_cpu_model->action_cancel = action_cancel;
 763   surf_cpu_model->action_state_set = cpu_action_state_set;
 764
 765   surf_cpu_model->model_private->resource_used = resource_used;
 766   surf_cpu_model->model_private->share_resources = share_resources;
 767   surf_cpu_model->model_private->update_actions_state = update_actions_state;
 768   surf_cpu_model->model_private->update_resource_state =
 769     update_resource_state;
 770   surf_cpu_model->model_private->finalize = finalize;
 771
 772   surf_cpu_model->suspend = action_suspend;
 773   surf_cpu_model->resume = action_resume;
 774   surf_cpu_model->is_suspended = action_is_suspended;
 775   surf_cpu_model->set_max_duration = action_set_max_duration;
 776   surf_cpu_model->set_priority = action_set_priority;
 777   surf_cpu_model->get_remains = action_get_remains;
 778
 779   surf_cpu_model->extension.cpu.execute = execute;
 780   surf_cpu_model->extension.cpu.sleep = action_sleep;
 781
 782   surf_cpu_model->extension.cpu.get_state = get_state;
 783   surf_cpu_model->extension.cpu.get_speed = get_speed;
 784   surf_cpu_model->extension.cpu.get_available_speed = get_available_speed;
 785
 786   action_heap = xbt_heap_new(8, NULL);
 787   xbt_heap_set_update_callback(action_heap, action_update_index_heap);
 788
 789 }
 790
 791 void surf_cpu_model_init_ti(const char *filename)
 792 {
 793   if (surf_cpu_model)
 794     return;
 795   surf_cpu_model_init_internal();
 796   define_callbacks(filename);
 797   xbt_dynar_push(model_list, &surf_cpu_model);
 798 }
 799
 800
 801 /**
 802 * \brief Integrate trace
 803 *
 804 * Wrapper around surf_cpu_integrate_trace_simple() to get
 805 * the cyclic effect.
 806 *
 807 * \param trace Trace structure.
 808 * \param a                      Begin of interval
 809 * \param b                      End of interval
 810 * \return the integrate value. -1 if an error occurs.
 811 */
 812 static double surf_cpu_integrate_trace(surf_cpu_ti_tgmr_t trace, double a,
 813                                        double b)
 814 {
 815   double first_chunk;
 816   double middle_chunk;
 817   double last_chunk;
 818   int a_index, b_index;
 819
 820   if ((a < 0.0) || (a > b)) {
 821     CRITICAL2
 822       ("Error, invalid integration interval [%.2f,%.2f]. You probably have a task executing with negative computation amount. Check your code.",
 823        a, b);
 824     xbt_abort();
 825   }
 826   if (a == b)
 827     return 0.0;
 828
 829   if (trace->type == TRACE_FIXED) {
 830     return ((b - a) * trace->value);
 831   }
 832
 833   if (ceil(a / trace->last_time) == a / trace->last_time)
 834     a_index = 1 + (int) (ceil(a / trace->last_time));
 835   else
 836     a_index = (int) (ceil(a / trace->last_time));
 837
 838   b_index = (int) (floor(b / trace->last_time));
 839
 840   if (a_index > b_index) {      /* Same chunk */
 841     return surf_cpu_integrate_trace_simple(trace->trace,
 842                                            a - (a_index -
 843                                                 1) * trace->last_time,
 844                                            b - (b_index) * trace->last_time);
 845   }
 846
 847   first_chunk = surf_cpu_integrate_trace_simple(trace->trace,
 848                                                 a - (a_index -
 849                                                      1) * trace->last_time,
 850                                                 trace->last_time);
 851   middle_chunk = (b_index - a_index) * trace->total;
 852   last_chunk = surf_cpu_integrate_trace_simple(trace->trace,
 853                                                0.0,
 854                                                b -
 855                                                (b_index) * trace->last_time);
 856
 857   DEBUG3("first_chunk=%.2f  middle_chunk=%.2f  last_chunk=%.2f\n",
 858          first_chunk, middle_chunk, last_chunk);
 859
 860   return (first_chunk + middle_chunk + last_chunk);
 861 }
 862
 863 /**
 864  * \brief Auxiliary function to calculate the integral between a and b.
 865  *              It simply calculates the integral at point a and b and returns the difference
 866  *      between them.
 867  * \param trace         Trace structure
 868  * \param a                             Initial point
 869  * \param b     Final point
 870  * \return      Integral
 871 */
 872 static double surf_cpu_integrate_trace_simple(surf_cpu_ti_trace_t trace,
 873                                               double a, double b)
 874 {
 875   return surf_cpu_integrate_trace_simple_point(trace,
 876                                                b) -
 877     surf_cpu_integrate_trace_simple_point(trace, a);
 878 }
 879
 880 /**
 881  * \brief Auxiliary function to calculate the integral at point a.
 882  * \param trace         Trace structure
 883  * \param a                             point
 884  * \return      Integral
 885 */
 886 static double surf_cpu_integrate_trace_simple_point(surf_cpu_ti_trace_t trace,
 887                                                     double a)
 888 {
 889   double integral = 0;
 890   int ind;
 891   double a_aux = a;
 892   ind =
 893     surf_cpu_binary_search(trace->time_points, a, 0, trace->nb_points - 1);
 894   integral += trace->integral[ind];
 895   DEBUG7("a %lf ind %d integral %lf ind + 1 %lf ind %lf time +1 %lf time %lf",
 896          a, ind, integral, trace->integral[ind + 1], trace->integral[ind],
 897          trace->time_points[ind + 1], trace->time_points[ind]);
 898   double_update(&a_aux, trace->time_points[ind]);
 899   if (a_aux > 0)
 900     integral +=
 901       ((trace->integral[ind + 1] -
 902         trace->integral[ind]) / (trace->time_points[ind + 1] -
 903                                  trace->time_points[ind])) * (a -
 904                                                               trace->
 905                                                               time_points
 906                                                               [ind]);
 907   DEBUG2("Integral a %lf = %lf", a, integral);
 908
 909   return integral;
 910 }
 911
 912 /**
 913 * \brief Calculate the time needed to execute "amount" on cpu.
 914 *
 915 * Here, amount can span multiple trace periods
 916 *
 917 * \param trace  CPU trace structure
 918 * \param a                              Initial time
 919 * \param amount Amount to be executed
 920 * \return       End time
 921 */
 922 static double surf_cpu_solve_trace(surf_cpu_ti_tgmr_t trace, double a,
 923                                    double amount)
 924 {
 925   int quotient;
 926   double reduced_b;
 927   double reduced_amount;
 928   double reduced_a;
 929   double b;
 930
 931 /* Fix very small negative numbers */
 932   if ((a < 0.0) && (a > -EPSILON)) {
 933     a = 0.0;
 934   }
 935   if ((amount < 0.0) && (amount > -EPSILON)) {
 936     amount = 0.0;
 937   }
 938
 939 /* Sanity checks */
 940   if ((a < 0.0) || (amount < 0.0)) {
 941     CRITICAL2
 942       ("Error, invalid parameters [a = %.2f, amount = %.2f]. You probably have a task executing with negative computation amount. Check your code.",
 943        a, amount);
 944     xbt_abort();
 945   }
 946
 947 /* At this point, a and amount are positive */
 948
 949   if (amount < EPSILON)
 950     return a;
 951
 952 /* Is the trace fixed ? */
 953   if (trace->type == TRACE_FIXED) {
 954     return (a + (amount / trace->value));
 955   }
 956
 957   DEBUG2("amount %lf total %lf", amount, trace->total);
 958 /* Reduce the problem to one where amount <= trace_total */
 959   quotient = (int) (floor(amount / trace->total));
 960   reduced_amount = (trace->total) * ((amount / trace->total) -
 961                                      floor(amount / trace->total));
 962   reduced_a = a - (trace->last_time) * (int) (floor(a / trace->last_time));
 963
 964   DEBUG3("Quotient: %d reduced_amount: %lf reduced_a: %lf", quotient,
 965          reduced_amount, reduced_a);
 966
 967 /* Now solve for new_amount which is <= trace_total */
 968 /*
 969          fprintf(stderr,"reduced_a = %.2f\n",reduced_a);
 970          fprintf(stderr,"reduced_amount = %.2f\n",reduced_amount);
 971  */
 972   reduced_b =
 973     surf_cpu_solve_trace_somewhat_simple(trace, reduced_a, reduced_amount);
 974
 975 /* Re-map to the original b and amount */
 976   b = (trace->last_time) * (int) (floor(a / trace->last_time)) +
 977     (quotient * trace->last_time) + reduced_b;
 978   return b;
 979 }
 980
 981 /**
 982 * \brief Auxiliary function to solve integral
 983 *
 984 * Here, amount is <= trace->total
 985 * and a <=trace->last_time
 986 *
 987 */
 988 static double surf_cpu_solve_trace_somewhat_simple(surf_cpu_ti_tgmr_t trace,
 989                                                    double a, double amount)
 990 {
 991   double amount_till_end;
 992   double b;
 993
 994   DEBUG2("Solve integral: [%.2f, amount=%.2f]", a, amount);
 995   amount_till_end = surf_cpu_integrate_trace(trace, a, trace->last_time);
 996 /*
 997          fprintf(stderr,"amount_till_end=%.2f\n",amount_till_end);
 998  */
 999
1000   if (amount_till_end > amount) {
1001     b = surf_cpu_solve_trace_simple(trace->trace, a, amount);
1002   } else {
1003     b = trace->last_time +
1004       surf_cpu_solve_trace_simple(trace->trace, 0.0,
1005                                   amount - amount_till_end);
1006   }
1007   return b;
1008 }
1009
1010 /**
1011  * \brief Auxiliary function to solve integral.
1012  *      It returns the date when the requested amount of flops is available
1013  * \param trace         Trace structure
1014  * \param a                             Initial point
1015  * \param amount        Amount of flops
1016  * \return The date when amount is available.
1017 */
1018 static double surf_cpu_solve_trace_simple(surf_cpu_ti_trace_t trace, double a,
1019                                           double amount)
1020 {
1021   double integral_a;
1022   int ind;
1023   double time;
1024   integral_a = surf_cpu_integrate_trace_simple_point(trace, a);
1025   ind =
1026     surf_cpu_binary_search(trace->integral, integral_a + amount, 0,
1027                            trace->nb_points - 1);
1028   time = trace->time_points[ind];
1029   time +=
1030     (integral_a + amount -
1031      trace->integral[ind]) / ((trace->integral[ind + 1] -
1032                                trace->integral[ind]) /
1033                               (trace->time_points[ind + 1] -
1034                                trace->time_points[ind]));
1035
1036   return time;
1037 }
1038
1039 /**
1040  * \brief Binary search in array.
1041  *      It returns the first point of the interval in which "a" is.
1042  * \param array         Array
1043  * \param a                             Value to search
1044  * \param low           Low bound to search in array
1045  * \param high          Upper bound to search in array
1046  * \return Index of point
1047 */
1048 static int surf_cpu_binary_search(double *array, double a, int low, int high)
1049 {
1050   int mid = low + (high - low) / 2;
1051   DEBUG5("a %lf low %d high %d mid %d value %lf", a, low, high, mid,
1052          array[mid]);
1053   /* a == array[mid] */
1054   if (array[mid] == a)
1055     return mid;
1056   /* a is between mid and mid+1 */
1057   if (array[mid] < a && array[mid + 1] > a)
1058     return mid;
1059
1060   if (array[mid] < a)
1061     return surf_cpu_binary_search(array, a, mid + 1, high);
1062   else
1063     return surf_cpu_binary_search(array, a, low, mid - 1);
1064 }