src/surf/cpu_cas01.cpp

   1 /* Copyright (c) 2009-2011, 2013. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include "cpu_cas01.hpp"
   8 #include "cpu_ti.hpp"
   9 #include "maxmin_private.h"
  10 #include "simgrid/sg_config.h"
  11
  12 extern "C" {
  13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_cas, surf_cpu,
  14                                 "Logging specific to the SURF CPU IMPROVED module");
  15 }
  16
  17 /*************
  18  * CallBacks *
  19  *************/
  20
  21 static void parse_cpu_init(sg_platf_host_cbarg_t host){
  22   ((CpuCas01ModelPtr)surf_cpu_model_pm)->parseInit(host);
  23 }
  24
  25 static void cpu_add_traces_cpu(){
  26   surf_cpu_model_pm->addTraces();
  27 }
  28
  29 static void cpu_define_callbacks()
  30 {
  31   sg_platf_host_add_cb(parse_cpu_init);
  32   sg_platf_postparse_add_cb(cpu_add_traces_cpu);
  33 }
  34
  35 /*********
  36  * Model *
  37  *********/
  38 void surf_cpu_model_init_Cas01()
  39 {
  40   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
  41
  42   xbt_assert(!surf_cpu_model_pm);
  43   xbt_assert(!surf_cpu_model_vm);
  44
  45   if (!strcmp(optim, "TI")) {
  46     surf_cpu_model_init_ti();
  47     return;
  48   }
  49
  50   surf_cpu_model_pm = new CpuCas01Model();
  51   surf_cpu_model_vm  = new CpuCas01Model();
  52
  53   cpu_define_callbacks();
  54   ModelPtr model_pm = static_cast<ModelPtr>(surf_cpu_model_pm);
  55   ModelPtr model_vm = static_cast<ModelPtr>(surf_cpu_model_vm);
  56   xbt_dynar_push(model_list, &model_pm);
  57   xbt_dynar_push(model_list, &model_vm);
  58 }
  59
  60 CpuCas01Model::CpuCas01Model() : CpuModel("cpu")
  61 {
  62   ActionPtr action = NULL;
  63   ActionLmmPtr actionlmm = NULL;
  64
  65   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
  66   int select = xbt_cfg_get_boolean(_sg_cfg_set, "cpu/maxmin_selective_update");
  67
  68   if (!strcmp(optim, "Full")) {
  69     p_updateMechanism = UM_FULL;
  70     m_selectiveUpdate = select;
  71   } else if (!strcmp(optim, "Lazy")) {
  72     p_updateMechanism = UM_LAZY;
  73     m_selectiveUpdate = 1;
  74     xbt_assert((select == 1)
  75                ||
  76                (xbt_cfg_is_default_value
  77                 (_sg_cfg_set, "cpu/maxmin_selective_update")),
  78                "Disabling selective update while using the lazy update mechanism is dumb!");
  79   } else {
  80     xbt_die("Unsupported optimization (%s) for this model", optim);
  81   }
  82
  83   p_cpuRunningActionSetThatDoesNotNeedBeingChecked =
  84       xbt_swag_new(xbt_swag_offset(*action, p_stateHookup));
  85
  86   if (p_updateMechanism == UM_LAZY) {
  87         shareResources = &CpuCas01Model::shareResourcesLazy;
  88         updateActionsState = &CpuCas01Model::updateActionsStateLazy;
  89
  90   } else if (p_updateMechanism == UM_FULL) {
  91         shareResources = &CpuCas01Model::shareResourcesFull;
  92         updateActionsState = &CpuCas01Model::updateActionsStateFull;
  93   } else
  94     xbt_die("Invalid cpu update mechanism!");
  95
  96   if (!p_maxminSystem) {
  97     p_maxminSystem = lmm_system_new(m_selectiveUpdate);
  98   }
  99
 100   if (p_updateMechanism == UM_LAZY) {
 101     p_actionHeap = xbt_heap_new(8, NULL);
 102     xbt_heap_set_update_callback(p_actionHeap,  surf_action_lmm_update_index_heap);
 103     p_modifiedSet = xbt_swag_new(xbt_swag_offset(*actionlmm, p_actionListHookup));
 104     p_maxminSystem->keep_track = p_modifiedSet;
 105   }
 106 }
 107
 108 CpuCas01Model::~CpuCas01Model()
 109 {
 110   lmm_system_free(p_maxminSystem);
 111   p_maxminSystem = NULL;
 112
 113   if (p_actionHeap)
 114     xbt_heap_free(p_actionHeap);
 115   xbt_swag_free(p_modifiedSet);
 116
 117   surf_cpu_model_pm = NULL;
 118
 119   xbt_swag_free(p_cpuRunningActionSetThatDoesNotNeedBeingChecked);
 120 }
 121
 122 void CpuCas01Model::parseInit(sg_platf_host_cbarg_t host)
 123 {
 124   createResource(host->id,
 125         host->power_peak,
 126         host->pstate,
 127         host->power_scale,
 128         host->power_trace,
 129         host->core_amount,
 130         host->initial_state,
 131         host->state_trace,
 132         host->properties);
 133 }
 134
 135 CpuPtr CpuCas01Model::createResource(const char *name, xbt_dynar_t power_peak,
 136                                   int pstate, double power_scale,
 137                           tmgr_trace_t power_trace, int core,
 138                           e_surf_resource_state_t state_initial,
 139                           tmgr_trace_t state_trace,
 140                           xbt_dict_t cpu_properties)
 141 {
 142   CpuPtr cpu = NULL;
 143   xbt_assert(!surf_cpu_resource_priv(surf_cpu_resource_by_name(name)),
 144              "Host '%s' declared several times in the platform file",
 145              name);
 146   xbt_assert(xbt_dynar_getfirst_as(power_peak, double) > 0.0,
 147       "Power has to be >0.0");
 148   xbt_assert(core > 0, "Invalid number of cores %d", core);
 149
 150   cpu = new CpuCas01Lmm(this, name, power_peak, pstate, power_scale, power_trace, core, state_initial, state_trace, cpu_properties);
 151   xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, static_cast<ResourcePtr>(cpu));
 152
 153   return cpu;
 154 }
 155
 156 double CpuCas01Model::shareResourcesFull(double /*now*/)
 157 {
 158   return Model::shareResourcesMaxMin(p_runningActionSet,
 159                              p_maxminSystem, lmm_solve);
 160 }
 161
 162 void CpuCas01Model::addTraces()
 163 {
 164   xbt_dict_cursor_t cursor = NULL;
 165   char *trace_name, *elm;
 166   static int called = 0;
 167   if (called)
 168     return;
 169   called = 1;
 170
 171   /* connect all traces relative to hosts */
 172   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 173     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 174     CpuCas01LmmPtr host = static_cast<CpuCas01LmmPtr>(surf_cpu_resource_priv(surf_cpu_resource_by_name(elm)));
 175
 176     xbt_assert(host, "Host %s undefined", elm);
 177     xbt_assert(trace, "Trace %s undefined", trace_name);
 178
 179     host->p_stateEvent =
 180         tmgr_history_add_trace(history, trace, 0.0, 0, static_cast<ResourcePtr>(host));
 181   }
 182
 183   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 184     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 185     CpuCas01LmmPtr host = dynamic_cast<CpuCas01LmmPtr>(static_cast<ResourcePtr>(surf_cpu_resource_priv(surf_cpu_resource_by_name(elm))));
 186
 187     xbt_assert(host, "Host %s undefined", elm);
 188     xbt_assert(trace, "Trace %s undefined", trace_name);
 189
 190     host->p_powerEvent =
 191         tmgr_history_add_trace(history, trace, 0.0, 0, static_cast<ResourcePtr>(host));
 192   }
 193 }
 194
 195 /************
 196  * Resource *
 197  ************/
 198 CpuCas01Lmm::CpuCas01Lmm(CpuCas01ModelPtr model, const char *name, xbt_dynar_t powerPeak,
 199                          int pstate, double powerScale, tmgr_trace_t powerTrace, int core,
 200                          e_surf_resource_state_t stateInitial, tmgr_trace_t stateTrace,
 201                          xbt_dict_t properties)
 202 : Resource(model, name, properties)
 203 , CpuLmm(model, name, properties, core, xbt_dynar_get_as(powerPeak, pstate, double), powerScale) {
 204   p_powerEvent = NULL;
 205   p_powerPeakList = powerPeak;
 206   m_pstate = pstate;
 207
 208   p_energy = xbt_new(s_energy_cpu_cas01_t, 1);
 209   p_energy->total_energy = 0;
 210   p_energy->power_range_watts_list = getWattsRangeList();
 211   p_energy->last_updated = surf_get_clock();
 212
 213   XBT_DEBUG("CPU create: peak=%f, pstate=%d", m_powerPeak, m_pstate);
 214
 215   m_core = core;
 216   p_stateCurrent = stateInitial;
 217   if (powerTrace)
 218     p_powerEvent = tmgr_history_add_trace(history, powerTrace, 0.0, 0, static_cast<ResourcePtr>(this));
 219
 220   if (stateTrace)
 221     p_stateEvent = tmgr_history_add_trace(history, stateTrace, 0.0, 0, static_cast<ResourcePtr>(this));
 222
 223   p_constraint = lmm_constraint_new(p_model->p_maxminSystem, this, m_core * m_powerScale * m_powerPeak);
 224 }
 225
 226 CpuCas01Lmm::~CpuCas01Lmm(){
 227   unsigned int iter;
 228   xbt_dynar_t power_tuple = NULL;
 229   xbt_dynar_foreach(p_energy->power_range_watts_list, iter, power_tuple)
 230     xbt_dynar_free(&power_tuple);
 231   xbt_dynar_free(&p_energy->power_range_watts_list);
 232   xbt_dynar_free(&p_powerPeakList);
 233   xbt_free(p_energy);
 234 }
 235
 236 bool CpuCas01Lmm::isUsed()
 237 {
 238   return lmm_constraint_used(p_model->p_maxminSystem, p_constraint);
 239 }
 240
 241 void CpuCas01Lmm::updateState(tmgr_trace_event_t event_type, double value, double date)
 242 {
 243   lmm_variable_t var = NULL;
 244   lmm_element_t elem = NULL;
 245
 246   if (event_type == p_powerEvent) {
 247         /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 248         xbt_assert(m_core == 1, "FIXME: add power scaling code also for constraint_core[i]");
 249
 250     m_powerScale = value;
 251     lmm_update_constraint_bound(surf_cpu_model_pm->p_maxminSystem, p_constraint,
 252                                 m_core * m_powerScale *
 253                                 m_powerPeak);
 254 #ifdef HAVE_TRACING
 255     TRACE_surf_host_set_power(date, m_name,
 256                               m_core * m_powerScale *
 257                               m_powerPeak);
 258 #endif
 259     while ((var = lmm_get_var_from_cnst
 260             (surf_cpu_model_pm->p_maxminSystem, p_constraint, &elem))) {
 261       CpuCas01ActionLmmPtr action = static_cast<CpuCas01ActionLmmPtr>(static_cast<ActionLmmPtr>(lmm_variable_id(var)));
 262
 263       lmm_update_variable_bound(surf_cpu_model_pm->p_maxminSystem,
 264                                 action->p_variable,
 265                                 m_powerScale * m_powerPeak);
 266     }
 267     if (tmgr_trace_event_free(event_type))
 268       p_powerEvent = NULL;
 269   } else if (event_type == p_stateEvent) {
 270         /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 271     xbt_assert(m_core == 1, "FIXME: add state change code also for constraint_core[i]");
 272
 273     if (value > 0) {
 274       if(p_stateCurrent == SURF_RESOURCE_OFF)
 275         xbt_dynar_push_as(host_that_restart, char*, (char *)m_name);
 276       p_stateCurrent = SURF_RESOURCE_ON;
 277     } else {
 278       lmm_constraint_t cnst = p_constraint;
 279
 280       p_stateCurrent = SURF_RESOURCE_OFF;
 281
 282       while ((var = lmm_get_var_from_cnst(surf_cpu_model_pm->p_maxminSystem, cnst, &elem))) {
 283         ActionLmmPtr action = static_cast<ActionLmmPtr>(lmm_variable_id(var));
 284
 285         if (action->getState() == SURF_ACTION_RUNNING ||
 286             action->getState() == SURF_ACTION_READY ||
 287             action->getState() == SURF_ACTION_NOT_IN_THE_SYSTEM) {
 288           action->m_finish = date;
 289           action->setState(SURF_ACTION_FAILED);
 290         }
 291       }
 292     }
 293     if (tmgr_trace_event_free(event_type))
 294       p_stateEvent = NULL;
 295   } else {
 296     XBT_CRITICAL("Unknown event ! \n");
 297     xbt_abort();
 298   }
 299
 300   return;
 301 }
 302
 303 ActionPtr CpuCas01Lmm::execute(double size)
 304 {
 305
 306   XBT_IN("(%s,%g)", m_name, size);
 307   CpuCas01ActionLmmPtr action = new CpuCas01ActionLmm(surf_cpu_model_pm, size, p_stateCurrent != SURF_RESOURCE_ON);
 308
 309   action->m_suspended = 0;     /* Should be useless because of the
 310                                                    calloc but it seems to help valgrind... */
 311
 312   action->p_variable =
 313       lmm_variable_new(surf_cpu_model_pm->p_maxminSystem, static_cast<ActionLmmPtr>(action),
 314                        action->m_priority,
 315                        m_powerScale * m_powerPeak, 1);
 316   if (surf_cpu_model_pm->p_updateMechanism == UM_LAZY) {
 317     action->m_indexHeap = -1;
 318     action->m_lastUpdate = surf_get_clock();
 319     action->m_lastValue = 0.0;
 320   }
 321   lmm_expand(surf_cpu_model_pm->p_maxminSystem, p_constraint,
 322              action->p_variable, 1.0);
 323   XBT_OUT();
 324   return action;
 325 }
 326
 327 ActionPtr CpuCas01Lmm::sleep(double duration)
 328 {
 329   if (duration > 0)
 330     duration = MAX(duration, MAXMIN_PRECISION);
 331
 332   XBT_IN("(%s,%g)", m_name, duration);
 333   CpuCas01ActionLmmPtr action = dynamic_cast<CpuCas01ActionLmmPtr>(execute(1.0));
 334
 335   // FIXME: sleep variables should not consume 1.0 in lmm_expand
 336   action->m_maxDuration = duration;
 337   action->m_suspended = 2;
 338   if (duration == NO_MAX_DURATION) {
 339     /* Move to the *end* of the corresponding action set. This convention
 340        is used to speed up update_resource_state  */
 341     xbt_swag_remove(static_cast<ActionPtr>(action), action->p_stateSet);
 342     action->p_stateSet = static_cast<CpuCas01ModelPtr>(p_model)->p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
 343     xbt_swag_insert(static_cast<ActionPtr>(action), action->p_stateSet);
 344   }
 345
 346   lmm_update_variable_weight(surf_cpu_model_pm->p_maxminSystem,
 347                              action->p_variable, 0.0);
 348   if (surf_cpu_model_pm->p_updateMechanism == UM_LAZY) {     // remove action from the heap
 349     action->heapRemove(surf_cpu_model_pm->p_actionHeap);
 350     // this is necessary for a variable with weight 0 since such
 351     // variables are ignored in lmm and we need to set its max_duration
 352     // correctly at the next call to share_resources
 353     xbt_swag_insert_at_head(static_cast<ActionLmmPtr>(action), surf_cpu_model_pm->p_modifiedSet);
 354   }
 355
 356   XBT_OUT();
 357   return action;
 358 }
 359
 360 xbt_dynar_t CpuCas01Lmm::getWattsRangeList()
 361 {
 362         xbt_dynar_t power_range_list;
 363         xbt_dynar_t power_tuple;
 364         int i = 0, pstate_nb=0;
 365         xbt_dynar_t current_power_values;
 366         double min_power, max_power;
 367
 368         if (m_properties == NULL)
 369                 return NULL;
 370
 371         char* all_power_values_str = (char*)xbt_dict_get_or_null(m_properties, "power_per_state");
 372
 373         if (all_power_values_str == NULL)
 374                 return NULL;
 375
 376
 377         power_range_list = xbt_dynar_new(sizeof(xbt_dynar_t), NULL);
 378         xbt_dynar_t all_power_values = xbt_str_split(all_power_values_str, ",");
 379
 380         pstate_nb = xbt_dynar_length(all_power_values);
 381         for (i=0; i< pstate_nb; i++)
 382         {
 383                 /* retrieve the power values associated with the current pstate */
 384                 current_power_values = xbt_str_split(xbt_dynar_get_as(all_power_values, i, char*), ":");
 385                 xbt_assert(xbt_dynar_length(current_power_values) > 1,
 386                                 "Power properties incorrectly defined - could not retrieve min and max power values for host %s",
 387                                 m_name);
 388
 389                 /* min_power corresponds to the idle power (cpu load = 0) */
 390                 /* max_power is the power consumed at 100% cpu load       */
 391                 min_power = atof(xbt_dynar_get_as(current_power_values, 0, char*));
 392                 max_power = atof(xbt_dynar_get_as(current_power_values, 1, char*));
 393
 394                 power_tuple = xbt_dynar_new(sizeof(double), NULL);
 395                 xbt_dynar_push_as(power_tuple, double, min_power);
 396                 xbt_dynar_push_as(power_tuple, double, max_power);
 397
 398                 xbt_dynar_push_as(power_range_list, xbt_dynar_t, power_tuple);
 399                 xbt_dynar_free(&current_power_values);
 400         }
 401         xbt_dynar_free(&all_power_values);
 402         return power_range_list;
 403 }
 404
 405 /**
 406  * Computes the power consumed by the host according to the current pstate and processor load
 407  *
 408  */
 409 double CpuCas01Lmm::getCurrentWattsValue(double cpu_load)
 410 {
 411         xbt_dynar_t power_range_list = p_energy->power_range_watts_list;
 412
 413         if (power_range_list == NULL)
 414         {
 415                 XBT_DEBUG("No power range properties specified for host %s", m_name);
 416                 return 0;
 417         }
 418         xbt_assert(xbt_dynar_length(power_range_list) == xbt_dynar_length(p_powerPeakList),
 419                                                 "The number of power ranges in the properties does not match the number of pstates for host %s",
 420                                                 m_name);
 421
 422     /* retrieve the power values associated with the current pstate */
 423     xbt_dynar_t current_power_values = xbt_dynar_get_as(power_range_list, m_pstate, xbt_dynar_t);
 424
 425     /* min_power corresponds to the idle power (cpu load = 0) */
 426     /* max_power is the power consumed at 100% cpu load       */
 427     double min_power = xbt_dynar_get_as(current_power_values, 0, double);
 428     double max_power = xbt_dynar_get_as(current_power_values, 1, double);
 429     double power_slope = max_power - min_power;
 430
 431     double current_power = min_power + cpu_load * power_slope;
 432
 433         XBT_DEBUG("[get_current_watts] min_power=%f, max_power=%f, slope=%f", min_power, max_power, power_slope);
 434     XBT_DEBUG("[get_current_watts] Current power (watts) = %f, load = %f", current_power, cpu_load);
 435
 436         return current_power;
 437 }
 438
 439 /**
 440  * Updates the total energy consumed as the sum of the current energy and
 441  *                                               the energy consumed by the current action
 442  */
 443 void CpuCas01Lmm::updateEnergy(double cpu_load)
 444 {
 445   double start_time = p_energy->last_updated;
 446   double finish_time = surf_get_clock();
 447
 448   XBT_DEBUG("[cpu_update_energy] action time interval=(%f-%f), current power peak=%f, current pstate=%d",
 449                   start_time, finish_time, m_powerPeak, m_pstate);
 450   double current_energy = p_energy->total_energy;
 451   double action_energy = getCurrentWattsValue(cpu_load)*(finish_time-start_time);
 452
 453   p_energy->total_energy = current_energy + action_energy;
 454   p_energy->last_updated = finish_time;
 455
 456   XBT_DEBUG("[cpu_update_energy] old_energy_value=%f, action_energy_value=%f", current_energy, action_energy);
 457 }
 458
 459 double CpuCas01Lmm::getCurrentPowerPeak()
 460 {
 461   return m_powerPeak;
 462 }
 463
 464 double CpuCas01Lmm::getPowerPeakAt(int pstate_index)
 465 {
 466   xbt_dynar_t plist = p_powerPeakList;
 467   xbt_assert((pstate_index <= (int)xbt_dynar_length(plist)), "Invalid parameters (pstate index out of bounds)");
 468
 469   return xbt_dynar_get_as(plist, pstate_index, double);
 470 }
 471
 472 int CpuCas01Lmm::getNbPstates()
 473 {
 474   return xbt_dynar_length(p_powerPeakList);
 475 }
 476
 477 void CpuCas01Lmm::setPowerPeakAt(int pstate_index)
 478 {
 479   xbt_dynar_t plist = p_powerPeakList;
 480   xbt_assert((pstate_index <= (int)xbt_dynar_length(plist)), "Invalid parameters (pstate index out of bounds)");
 481
 482   double new_power_peak = xbt_dynar_get_as(plist, pstate_index, double);
 483   m_pstate = pstate_index;
 484   m_powerPeak = new_power_peak;
 485 }
 486
 487 double CpuCas01Lmm::getConsumedEnergy()
 488 {
 489   return p_energy->total_energy;
 490 }
 491
 492 /**********
 493  * Action *
 494  **********/
 495
 496 /**
 497  * Update the CPU total energy for a finished action
 498  *
 499  */
 500 void CpuCas01ActionLmm::updateEnergy()
 501 {
 502   CpuCas01LmmPtr cpu  = static_cast<CpuCas01LmmPtr>(lmm_constraint_id(lmm_get_cnst_from_var
 503                                                                                   (p_model->p_maxminSystem,
 504                                                                                                   p_variable, 0)));
 505
 506   if(cpu->p_energy->last_updated < surf_get_clock()) {
 507         double load = lmm_constraint_get_usage(cpu->p_constraint) / cpu->m_powerPeak;
 508     cpu->updateEnergy(load);
 509   }
 510 }