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