src/surf/cpu_cas01.cpp

   1 /* Copyright (c) 2009-2011. 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 "surf.hpp"
  10 #include "maxmin_private.h"
  11 #include "simgrid/sg_config.h"
  12
  13 extern "C" {
  14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_cas, surf_cpu,
  15                                 "Logging specific to the SURF CPU IMPROVED module");
  16 }
  17
  18 static xbt_swag_t
  19     cpu_running_action_set_that_does_not_need_being_checked = NULL;
  20
  21 /*************
  22  * CallBacks *
  23  *************/
  24
  25 static void parse_cpu_init(sg_platf_host_cbarg_t host){
  26   ((CpuCas01ModelPtr)surf_cpu_model)->parseInit(host);
  27 }
  28
  29 static void cpu_add_traces_cpu(){
  30   surf_cpu_model->addTraces();
  31 }
  32
  33 static void cpu_define_callbacks()
  34 {
  35   sg_platf_host_add_cb(parse_cpu_init);
  36   sg_platf_postparse_add_cb(cpu_add_traces_cpu);
  37 }
  38
  39 /*********
  40  * Model *
  41  *********/
  42 void surf_cpu_model_init_Cas01()
  43 {
  44   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
  45
  46   if (surf_cpu_model)
  47     return;
  48
  49   if (!strcmp(optim, "TI")) {
  50     surf_cpu_model_init_ti();
  51     return;
  52   }
  53
  54   surf_cpu_model = new CpuCas01Model();
  55   cpu_define_callbacks();
  56   ModelPtr model = static_cast<ModelPtr>(surf_cpu_model);
  57   xbt_dynar_push(model_list, &model);
  58 }
  59
  60 CpuCas01Model::CpuCas01Model() : CpuModel("cpu")
  61 {
  62   ActionPtr action;
  63   ActionLmmPtr actionlmm;
  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   cpu_running_action_set_that_does_not_need_being_checked =
  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 = NULL;
 118
 119   xbt_swag_free(cpu_running_action_set_that_does_not_need_being_checked);
 120   cpu_running_action_set_that_does_not_need_being_checked = NULL;
 121 }
 122
 123 void CpuCas01Model::parseInit(sg_platf_host_cbarg_t host)
 124 {
 125   createResource(host->id,
 126         host->power_peak,
 127         host->pstate,
 128         host->power_scale,
 129         host->power_trace,
 130         host->core_amount,
 131         host->initial_state,
 132         host->state_trace,
 133         host->properties);
 134 }
 135
 136 CpuCas01LmmPtr CpuCas01Model::createResource(const char *name, xbt_dynar_t power_peak,
 137                                   int pstate, double power_scale,
 138                           tmgr_trace_t power_trace, int core,
 139                           e_surf_resource_state_t state_initial,
 140                           tmgr_trace_t state_trace,
 141                           xbt_dict_t cpu_properties)
 142 {
 143   CpuPtr cpu = NULL;
 144   xbt_assert(!surf_cpu_resource_priv(surf_cpu_resource_by_name(name)),
 145              "Host '%s' declared several times in the platform file",
 146              name);
 147   xbt_assert(power_peak > 0, "Power has to be >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 (CpuCas01LmmPtr) xbt_lib_get_elm_or_null(host_lib, name);
 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         CpuLmm(model, name, properties), Resource(model, name, properties) {
 203   m_powerPeak = xbt_dynar_get_as(powerPeak, pstate, double);
 204   p_powerPeakList = powerPeak;
 205   m_pstate = pstate;
 206
 207   p_energy = xbt_new(s_energy_cpu_cas01_t, 1);
 208   p_energy->total_energy = 0;
 209   p_energy->power_range_watts_list = getWattsRangeList();
 210   p_energy->last_updated = surf_get_clock();
 211
 212   XBT_DEBUG("CPU create: peak=%f, pstate=%d", m_powerPeak, m_pstate);
 213
 214   m_powerScale = powerScale;
 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   return;
 235 }
 236
 237 bool CpuCas01Lmm::isUsed()
 238 {
 239   return lmm_constraint_used(p_model->p_maxminSystem, p_constraint);
 240 }
 241
 242 void CpuCas01Lmm::updateState(tmgr_trace_event_t event_type, double value, double date)
 243 {
 244   lmm_variable_t var = NULL;
 245   lmm_element_t elem = NULL;
 246
 247   if (event_type == p_powerEvent) {
 248     m_powerScale = value;
 249     lmm_update_constraint_bound(surf_cpu_model->p_maxminSystem, p_constraint,
 250                                 m_core * m_powerScale *
 251                                 m_powerPeak);
 252 #ifdef HAVE_TRACING
 253     TRACE_surf_host_set_power(date, m_name,
 254                               m_core * m_powerScale *
 255                               m_powerPeak);
 256 #endif
 257     while ((var = lmm_get_var_from_cnst
 258             (surf_cpu_model->p_maxminSystem, p_constraint, &elem))) {
 259       CpuCas01ActionLmmPtr action = static_cast<CpuCas01ActionLmmPtr>(static_cast<ActionLmmPtr>(lmm_variable_id(var)));
 260
 261       lmm_update_variable_bound(surf_cpu_model->p_maxminSystem,
 262                                 action->p_variable,
 263                                 m_powerScale * m_powerPeak);
 264     }
 265     if (tmgr_trace_event_free(event_type))
 266       p_powerEvent = NULL;
 267   } else if (event_type == p_stateEvent) {
 268     if (value > 0) {
 269       if(p_stateCurrent == SURF_RESOURCE_OFF)
 270         xbt_dynar_push_as(host_that_restart, char*, (char *)m_name);
 271       p_stateCurrent = SURF_RESOURCE_ON;
 272     } else {
 273       lmm_constraint_t cnst = p_constraint;
 274
 275       p_stateCurrent = SURF_RESOURCE_OFF;
 276
 277       while ((var = lmm_get_var_from_cnst(surf_cpu_model->p_maxminSystem, cnst, &elem))) {
 278         ActionLmmPtr action = static_cast<ActionLmmPtr>(lmm_variable_id(var));
 279
 280         if (action->getState() == SURF_ACTION_RUNNING ||
 281             action->getState() == SURF_ACTION_READY ||
 282             action->getState() == SURF_ACTION_NOT_IN_THE_SYSTEM) {
 283           action->m_finish = date;
 284           action->setState(SURF_ACTION_FAILED);
 285         }
 286       }
 287     }
 288     if (tmgr_trace_event_free(event_type))
 289       p_stateEvent = NULL;
 290   } else {
 291     XBT_CRITICAL("Unknown event ! \n");
 292     xbt_abort();
 293   }
 294
 295   return;
 296 }
 297
 298 ActionPtr CpuCas01Lmm::execute(double size)
 299 {
 300
 301   XBT_IN("(%s,%g)", m_name, size);
 302   CpuCas01ActionLmmPtr action = new CpuCas01ActionLmm(surf_cpu_model, size, p_stateCurrent != SURF_RESOURCE_ON);
 303
 304   action->m_suspended = 0;     /* Should be useless because of the
 305                                                    calloc but it seems to help valgrind... */
 306
 307   action->p_variable =
 308       lmm_variable_new(surf_cpu_model->p_maxminSystem, static_cast<ActionLmmPtr>(action),
 309                        action->m_priority,
 310                        m_powerScale * m_powerPeak, 1);
 311   if (surf_cpu_model->p_updateMechanism == UM_LAZY) {
 312     action->m_indexHeap = -1;
 313     action->m_lastUpdate = surf_get_clock();
 314     action->m_lastValue = 0.0;
 315   }
 316   lmm_expand(surf_cpu_model->p_maxminSystem, p_constraint,
 317              action->p_variable, 1.0);
 318   XBT_OUT();
 319   return action;
 320 }
 321
 322 ActionPtr CpuCas01Lmm::sleep(double duration)
 323 {
 324   if (duration > 0)
 325     duration = MAX(duration, MAXMIN_PRECISION);
 326
 327   XBT_IN("(%s,%g)", m_name, duration);
 328   CpuCas01ActionLmmPtr action = dynamic_cast<CpuCas01ActionLmmPtr>(execute(1.0));
 329
 330   // FIXME: sleep variables should not consume 1.0 in lmm_expand
 331   action->m_maxDuration = duration;
 332   action->m_suspended = 2;
 333   if (duration == NO_MAX_DURATION) {
 334     /* Move to the *end* of the corresponding action set. This convention
 335        is used to speed up update_resource_state  */
 336     xbt_swag_remove(static_cast<ActionPtr>(action), action->p_stateSet);
 337     action->p_stateSet = cpu_running_action_set_that_does_not_need_being_checked;
 338     xbt_swag_insert(static_cast<ActionPtr>(action), action->p_stateSet);
 339   }
 340
 341   lmm_update_variable_weight(surf_cpu_model->p_maxminSystem,
 342                              action->p_variable, 0.0);
 343   if (surf_cpu_model->p_updateMechanism == UM_LAZY) {     // remove action from the heap
 344     action->heapRemove(surf_cpu_model->p_actionHeap);
 345     // this is necessary for a variable with weight 0 since such
 346     // variables are ignored in lmm and we need to set its max_duration
 347     // correctly at the next call to share_resources
 348     xbt_swag_insert_at_head(static_cast<ActionLmmPtr>(action), surf_cpu_model->p_modifiedSet);
 349   }
 350
 351   XBT_OUT();
 352   return action;
 353 }
 354
 355 xbt_dynar_t CpuCas01Lmm::getWattsRangeList()
 356 {
 357         xbt_dynar_t power_range_list;
 358         xbt_dynar_t power_tuple;
 359         int i = 0, pstate_nb=0;
 360         xbt_dynar_t current_power_values;
 361         double min_power, max_power;
 362
 363         if (m_properties == NULL)
 364                 return NULL;
 365
 366         char* all_power_values_str = (char*)xbt_dict_get_or_null(m_properties, "power_per_state");
 367
 368         if (all_power_values_str == NULL)
 369                 return NULL;
 370
 371
 372         power_range_list = xbt_dynar_new(sizeof(xbt_dynar_t), NULL);
 373         xbt_dynar_t all_power_values = xbt_str_split(all_power_values_str, ",");
 374
 375         pstate_nb = xbt_dynar_length(all_power_values);
 376         for (i=0; i< pstate_nb; i++)
 377         {
 378                 /* retrieve the power values associated with the current pstate */
 379                 current_power_values = xbt_str_split(xbt_dynar_get_as(all_power_values, i, char*), ":");
 380                 xbt_assert(xbt_dynar_length(current_power_values) > 1,
 381                                 "Power properties incorrectly defined - could not retrieve min and max power values for host %s",
 382                                 m_name);
 383
 384                 /* min_power corresponds to the idle power (cpu load = 0) */
 385                 /* max_power is the power consumed at 100% cpu load       */
 386                 min_power = atof(xbt_dynar_get_as(current_power_values, 0, char*));
 387                 max_power = atof(xbt_dynar_get_as(current_power_values, 1, char*));
 388
 389                 power_tuple = xbt_dynar_new(sizeof(double), NULL);
 390                 xbt_dynar_push_as(power_tuple, double, min_power);
 391                 xbt_dynar_push_as(power_tuple, double, max_power);
 392
 393                 xbt_dynar_push_as(power_range_list, xbt_dynar_t, power_tuple);
 394                 xbt_dynar_free(&current_power_values);
 395         }
 396         xbt_dynar_free(&all_power_values);
 397         return power_range_list;
 398 }
 399
 400 /**
 401  * Computes the power consumed by the host according to the current pstate and processor load
 402  *
 403  */
 404 double CpuCas01Lmm::getCurrentWattsValue(double cpu_load)
 405 {
 406         xbt_dynar_t power_range_list = p_energy->power_range_watts_list;
 407
 408         if (power_range_list == NULL)
 409         {
 410                 XBT_DEBUG("No power range properties specified for host %s", m_name);
 411                 return 0;
 412         }
 413         xbt_assert(xbt_dynar_length(power_range_list) == xbt_dynar_length(p_powerPeakList),
 414                                                 "The number of power ranges in the properties does not match the number of pstates for host %s",
 415                                                 m_name);
 416
 417     /* retrieve the power values associated with the current pstate */
 418     xbt_dynar_t current_power_values = xbt_dynar_get_as(power_range_list, m_pstate, xbt_dynar_t);
 419
 420     /* min_power corresponds to the idle power (cpu load = 0) */
 421     /* max_power is the power consumed at 100% cpu load       */
 422     double min_power = xbt_dynar_get_as(current_power_values, 0, double);
 423     double max_power = xbt_dynar_get_as(current_power_values, 1, double);
 424     double power_slope = max_power - min_power;
 425
 426     double current_power = min_power + cpu_load * power_slope;
 427
 428         XBT_DEBUG("[get_current_watts] min_power=%f, max_power=%f, slope=%f", min_power, max_power, power_slope);
 429     XBT_DEBUG("[get_current_watts] Current power (watts) = %f, load = %f", current_power, cpu_load);
 430
 431         return current_power;
 432 }
 433
 434 /**
 435  * Updates the total energy consumed as the sum of the current energy and
 436  *                                               the energy consumed by the current action
 437  */
 438 void CpuCas01Lmm::updateEnergy(double cpu_load)
 439 {
 440   double start_time = p_energy->last_updated;
 441   double finish_time = surf_get_clock();
 442
 443   XBT_DEBUG("[cpu_update_energy] action time interval=(%f-%f), current power peak=%f, current pstate=%d",
 444                   start_time, finish_time, m_powerPeak, m_pstate);
 445   double current_energy = p_energy->total_energy;
 446   double action_energy = getCurrentWattsValue(cpu_load)*(finish_time-start_time);
 447
 448   p_energy->total_energy = current_energy + action_energy;
 449   p_energy->last_updated = finish_time;
 450
 451   XBT_DEBUG("[cpu_update_energy] old_energy_value=%f, action_energy_value=%f", current_energy, action_energy);
 452 }
 453
 454 double CpuCas01Lmm::getCurrentPowerPeak()
 455 {
 456   return m_powerPeak;
 457 }
 458
 459 double CpuCas01Lmm::getPowerPeakAt(int pstate_index)
 460 {
 461   xbt_dynar_t plist = p_powerPeakList;
 462   xbt_assert((pstate_index <= xbt_dynar_length(plist)), "Invalid parameters (pstate index out of bounds)");
 463
 464   return xbt_dynar_get_as(plist, pstate_index, double);
 465 }
 466
 467 int CpuCas01Lmm::getNbPstates()
 468 {
 469   return xbt_dynar_length(p_powerPeakList);
 470 }
 471
 472 void CpuCas01Lmm::setPowerPeakAt(int pstate_index)
 473 {
 474   xbt_dynar_t plist = p_powerPeakList;
 475   xbt_assert((pstate_index <= xbt_dynar_length(plist)), "Invalid parameters (pstate index out of bounds)");
 476
 477   double new_power_peak = xbt_dynar_get_as(plist, pstate_index, double);
 478   m_pstate = pstate_index;
 479   m_powerPeak = new_power_peak;
 480 }
 481
 482 double CpuCas01Lmm::getConsumedEnergy()
 483 {
 484   return p_energy->total_energy;
 485 }
 486
 487 /**********
 488  * Action *
 489  **********/
 490
 491 /**
 492  * Update the CPU total energy for a finished action
 493  *
 494  */
 495 void CpuCas01ActionLmm::updateEnergy()
 496 {
 497   CpuCas01LmmPtr cpu  = static_cast<CpuCas01LmmPtr>(lmm_constraint_id(lmm_get_cnst_from_var
 498                                                                                   (p_model->p_maxminSystem,
 499                                                                                                   p_variable, 0)));
 500
 501   if(cpu->p_energy->last_updated < surf_get_clock()) {
 502         double load = lmm_constraint_get_usage(cpu->p_constraint) / cpu->m_powerPeak;
 503     cpu->updateEnergy(load);
 504   }
 505 }