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 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_cas, surf_cpu,
  13                                 "Logging specific to the SURF CPU IMPROVED module");
  14
  15 /*************
  16  * CallBacks *
  17  *************/
  18
  19 static void parse_cpu_init(sg_platf_host_cbarg_t host){
  20   ((CpuCas01ModelPtr)surf_cpu_model_pm)->parseInit(host);
  21 }
  22
  23 static void cpu_add_traces_cpu(){
  24   surf_cpu_model_pm->addTraces();
  25 }
  26
  27 static void cpu_define_callbacks()
  28 {
  29   sg_platf_host_add_cb(parse_cpu_init);
  30   sg_platf_postparse_add_cb(cpu_add_traces_cpu);
  31 }
  32
  33 /*********
  34  * Model *
  35  *********/
  36 void surf_cpu_model_init_Cas01()
  37 {
  38   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
  39
  40   xbt_assert(!surf_cpu_model_pm);
  41   xbt_assert(!surf_cpu_model_vm);
  42
  43   if (!strcmp(optim, "TI")) {
  44     surf_cpu_model_init_ti();
  45     return;
  46   }
  47
  48   surf_cpu_model_pm = new CpuCas01Model();
  49   surf_cpu_model_vm  = new CpuCas01Model();
  50
  51   cpu_define_callbacks();
  52   ModelPtr model_pm = static_cast<ModelPtr>(surf_cpu_model_pm);
  53   ModelPtr model_vm = static_cast<ModelPtr>(surf_cpu_model_vm);
  54   xbt_dynar_push(model_list, &model_pm);
  55   xbt_dynar_push(model_list, &model_vm);
  56 }
  57
  58 CpuCas01Model::CpuCas01Model() : CpuModel("cpu")
  59 {
  60   ActionPtr action = NULL;
  61   ActionLmmPtr actionlmm = NULL;
  62
  63   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
  64   int select = xbt_cfg_get_boolean(_sg_cfg_set, "cpu/maxmin_selective_update");
  65
  66   if (!strcmp(optim, "Full")) {
  67     p_updateMechanism = UM_FULL;
  68     m_selectiveUpdate = select;
  69   } else if (!strcmp(optim, "Lazy")) {
  70     p_updateMechanism = UM_LAZY;
  71     m_selectiveUpdate = 1;
  72     xbt_assert((select == 1)
  73                ||
  74                (xbt_cfg_is_default_value
  75                 (_sg_cfg_set, "cpu/maxmin_selective_update")),
  76                "Disabling selective update while using the lazy update mechanism is dumb!");
  77   } else {
  78     xbt_die("Unsupported optimization (%s) for this model", optim);
  79   }
  80
  81   p_cpuRunningActionSetThatDoesNotNeedBeingChecked =
  82       xbt_swag_new(xbt_swag_offset(*action, p_stateHookup));
  83
  84   if (getUpdateMechanism() == UM_LAZY) {
  85         shareResources = &CpuCas01Model::shareResourcesLazy;
  86         updateActionsState = &CpuCas01Model::updateActionsStateLazy;
  87
  88   } else if (getUpdateMechanism() == UM_FULL) {
  89         shareResources = &CpuCas01Model::shareResourcesFull;
  90         updateActionsState = &CpuCas01Model::updateActionsStateFull;
  91   } else
  92     xbt_die("Invalid cpu update mechanism!");
  93
  94   if (!p_maxminSystem) {
  95     p_maxminSystem = lmm_system_new(m_selectiveUpdate);
  96   }
  97
  98   if (getUpdateMechanism() == UM_LAZY) {
  99     p_actionHeap = xbt_heap_new(8, NULL);
 100     xbt_heap_set_update_callback(p_actionHeap,  surf_action_lmm_update_index_heap);
 101     p_modifiedSet = xbt_swag_new(xbt_swag_offset(*actionlmm, p_actionListHookup));
 102     p_maxminSystem->keep_track = p_modifiedSet;
 103   }
 104 }
 105
 106 CpuCas01Model::~CpuCas01Model()
 107 {
 108   lmm_system_free(p_maxminSystem);
 109   p_maxminSystem = NULL;
 110
 111   if (p_actionHeap)
 112     xbt_heap_free(p_actionHeap);
 113   xbt_swag_free(p_modifiedSet);
 114
 115   surf_cpu_model_pm = NULL;
 116
 117   xbt_swag_free(p_cpuRunningActionSetThatDoesNotNeedBeingChecked);
 118 }
 119
 120 void CpuCas01Model::parseInit(sg_platf_host_cbarg_t host)
 121 {
 122   createResource(host->id,
 123         host->power_peak,
 124         host->pstate,
 125         host->power_scale,
 126         host->power_trace,
 127         host->core_amount,
 128         host->initial_state,
 129         host->state_trace,
 130         host->properties);
 131 }
 132
 133 CpuPtr CpuCas01Model::createResource(const char *name, xbt_dynar_t power_peak,
 134                                   int pstate, double power_scale,
 135                           tmgr_trace_t power_trace, int core,
 136                           e_surf_resource_state_t state_initial,
 137                           tmgr_trace_t state_trace,
 138                           xbt_dict_t cpu_properties)
 139 {
 140   CpuPtr cpu = NULL;
 141   xbt_assert(!surf_cpu_resource_priv(surf_cpu_resource_by_name(name)),
 142              "Host '%s' declared several times in the platform file",
 143              name);
 144   xbt_assert(xbt_dynar_getfirst_as(power_peak, double) > 0.0,
 145       "Power has to be >0.0");
 146   xbt_assert(core > 0, "Invalid number of cores %d", core);
 147
 148   cpu = new CpuCas01Lmm(this, name, power_peak, pstate, power_scale, power_trace, core, state_initial, state_trace, cpu_properties);
 149   xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, static_cast<ResourcePtr>(cpu));
 150
 151   return cpu;
 152 }
 153
 154 double CpuCas01Model::shareResourcesFull(double /*now*/)
 155 {
 156   return Model::shareResourcesMaxMin(getRunningActionSet(),
 157                              p_maxminSystem, lmm_solve);
 158 }
 159
 160 void CpuCas01Model::addTraces()
 161 {
 162   xbt_dict_cursor_t cursor = NULL;
 163   char *trace_name, *elm;
 164   static int called = 0;
 165   if (called)
 166     return;
 167   called = 1;
 168
 169   /* connect all traces relative to hosts */
 170   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 171     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 172     CpuCas01LmmPtr host = static_cast<CpuCas01LmmPtr>(surf_cpu_resource_priv(surf_cpu_resource_by_name(elm)));
 173
 174     xbt_assert(host, "Host %s undefined", elm);
 175     xbt_assert(trace, "Trace %s undefined", trace_name);
 176
 177     host->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, static_cast<ResourcePtr>(host));
 178   }
 179
 180   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 181     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 182     CpuCas01LmmPtr host = dynamic_cast<CpuCas01LmmPtr>(static_cast<ResourcePtr>(surf_cpu_resource_priv(surf_cpu_resource_by_name(elm))));
 183
 184     xbt_assert(host, "Host %s undefined", elm);
 185     xbt_assert(trace, "Trace %s undefined", trace_name);
 186
 187     host->p_powerEvent =
 188         tmgr_history_add_trace(history, trace, 0.0, 0, static_cast<ResourcePtr>(host));
 189   }
 190 }
 191
 192 /************
 193  * Resource *
 194  ************/
 195 CpuCas01Lmm::CpuCas01Lmm(CpuCas01ModelPtr model_, const char *name, xbt_dynar_t powerPeak,
 196                          int pstate, double powerScale, tmgr_trace_t powerTrace, int core,
 197                          e_surf_resource_state_t stateInitial, tmgr_trace_t stateTrace,
 198                          xbt_dict_t properties)
 199 : Resource(model_, name, properties)
 200 , CpuLmm(lmm_constraint_new(getModel()->getMaxminSystem(), this, core * powerScale * xbt_dynar_get_as(powerPeak, pstate, double)),
 201                  core, xbt_dynar_get_as(powerPeak, pstate, double), powerScale) {
 202   p_powerEvent = NULL;
 203   p_powerPeakList = powerPeak;
 204   m_pstate = pstate;
 205
 206   p_energy = xbt_new(s_energy_cpu_cas01_t, 1);
 207   p_energy->total_energy = 0;
 208   p_energy->power_range_watts_list = getWattsRangeList();
 209   p_energy->last_updated = surf_get_clock();
 210
 211   XBT_DEBUG("CPU create: peak=%f, pstate=%d", m_powerPeak, m_pstate);
 212
 213   m_core = core;
 214   m_stateCurrent = stateInitial;
 215   if (powerTrace)
 216     p_powerEvent = tmgr_history_add_trace(history, powerTrace, 0.0, 0, static_cast<ResourcePtr>(this));
 217
 218   if (stateTrace)
 219     p_stateEvent = tmgr_history_add_trace(history, stateTrace, 0.0, 0, static_cast<ResourcePtr>(this));
 220 }
 221
 222 CpuCas01Lmm::~CpuCas01Lmm(){
 223   unsigned int iter;
 224   xbt_dynar_t power_tuple = NULL;
 225   xbt_dynar_foreach(p_energy->power_range_watts_list, iter, power_tuple)
 226     xbt_dynar_free(&power_tuple);
 227   xbt_dynar_free(&p_energy->power_range_watts_list);
 228   xbt_dynar_free(&p_powerPeakList);
 229   xbt_free(p_energy);
 230 }
 231
 232 bool CpuCas01Lmm::isUsed()
 233 {
 234   return lmm_constraint_used(getModel()->getMaxminSystem(), constraint());
 235 }
 236
 237 void CpuCas01Lmm::updateState(tmgr_trace_event_t event_type, double value, double date)
 238 {
 239   lmm_variable_t var = NULL;
 240   lmm_element_t elem = NULL;
 241
 242   if (event_type == p_powerEvent) {
 243         /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 244         xbt_assert(m_core == 1, "FIXME: add power scaling code also for constraint_core[i]");
 245
 246     m_powerScale = value;
 247     lmm_update_constraint_bound(surf_cpu_model_pm->getMaxminSystem(), constraint(),
 248                                 m_core * m_powerScale *
 249                                 m_powerPeak);
 250 #ifdef HAVE_TRACING
 251     TRACE_surf_host_set_power(date, getName(),
 252                               m_core * m_powerScale *
 253                               m_powerPeak);
 254 #endif
 255     while ((var = lmm_get_var_from_cnst
 256             (surf_cpu_model_pm->getMaxminSystem(), constraint(), &elem))) {
 257       CpuCas01ActionLmmPtr action = static_cast<CpuCas01ActionLmmPtr>(static_cast<ActionLmmPtr>(lmm_variable_id(var)));
 258
 259       lmm_update_variable_bound(surf_cpu_model_pm->getMaxminSystem(),
 260                                 action->getVariable(),
 261                                 m_powerScale * m_powerPeak);
 262     }
 263     if (tmgr_trace_event_free(event_type))
 264       p_powerEvent = NULL;
 265   } else if (event_type == p_stateEvent) {
 266         /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 267     xbt_assert(m_core == 1, "FIXME: add state change code also for constraint_core[i]");
 268
 269     if (value > 0) {
 270       if(m_stateCurrent == SURF_RESOURCE_OFF)
 271         xbt_dynar_push_as(host_that_restart, char*, (char *)getName());
 272       m_stateCurrent = SURF_RESOURCE_ON;
 273     } else {
 274       lmm_constraint_t cnst = constraint();
 275
 276       m_stateCurrent = SURF_RESOURCE_OFF;
 277
 278       while ((var = lmm_get_var_from_cnst(surf_cpu_model_pm->getMaxminSystem(), cnst, &elem))) {
 279         ActionLmmPtr action = static_cast<ActionLmmPtr>(lmm_variable_id(var));
 280
 281         if (action->getState() == SURF_ACTION_RUNNING ||
 282             action->getState() == SURF_ACTION_READY ||
 283             action->getState() == SURF_ACTION_NOT_IN_THE_SYSTEM) {
 284           action->setFinishTime(date);
 285           action->setState(SURF_ACTION_FAILED);
 286         }
 287       }
 288     }
 289     if (tmgr_trace_event_free(event_type))
 290       p_stateEvent = NULL;
 291   } else {
 292     XBT_CRITICAL("Unknown event ! \n");
 293     xbt_abort();
 294   }
 295
 296   return;
 297 }
 298
 299 CpuActionPtr CpuCas01Lmm::execute(double size)
 300 {
 301
 302   XBT_IN("(%s,%g)", getName(), size);
 303   CpuCas01ActionLmmPtr action = new CpuCas01ActionLmm(surf_cpu_model_pm, size, m_stateCurrent != SURF_RESOURCE_ON,
 304                                                               m_powerScale * m_powerPeak, constraint());
 305
 306   XBT_OUT();
 307   return action;
 308 }
 309
 310 CpuActionPtr CpuCas01Lmm::sleep(double duration)
 311 {
 312   if (duration > 0)
 313     duration = MAX(duration, MAXMIN_PRECISION);
 314
 315   XBT_IN("(%s,%g)", getName(), duration);
 316   CpuCas01ActionLmmPtr action = new CpuCas01ActionLmm(surf_cpu_model_pm, 1.0, m_stateCurrent != SURF_RESOURCE_ON,
 317                                                       m_powerScale * m_powerPeak, constraint());
 318
 319
 320   // FIXME: sleep variables should not consume 1.0 in lmm_expand
 321   action->m_maxDuration = duration;
 322   action->m_suspended = 2;
 323   if (duration == NO_MAX_DURATION) {
 324     /* Move to the *end* of the corresponding action set. This convention
 325        is used to speed up update_resource_state  */
 326     xbt_swag_remove(static_cast<ActionPtr>(action), action->getStateSet());
 327     action->p_stateSet = static_cast<CpuCas01ModelPtr>(getModel())->p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
 328     xbt_swag_insert(static_cast<ActionPtr>(action), action->getStateSet());
 329   }
 330
 331   lmm_update_variable_weight(surf_cpu_model_pm->getMaxminSystem(),
 332                              action->getVariable(), 0.0);
 333   if (surf_cpu_model_pm->getUpdateMechanism() == UM_LAZY) {     // remove action from the heap
 334     action->heapRemove(surf_cpu_model_pm->getActionHeap());
 335     // this is necessary for a variable with weight 0 since such
 336     // variables are ignored in lmm and we need to set its max_duration
 337     // correctly at the next call to share_resources
 338     xbt_swag_insert_at_head(static_cast<ActionLmmPtr>(action), surf_cpu_model_pm->getModifiedSet());
 339   }
 340
 341   XBT_OUT();
 342   return action;
 343 }
 344
 345 xbt_dynar_t CpuCas01Lmm::getWattsRangeList()
 346 {
 347         xbt_dynar_t power_range_list;
 348         xbt_dynar_t power_tuple;
 349         int i = 0, pstate_nb=0;
 350         xbt_dynar_t current_power_values;
 351         double min_power, max_power;
 352
 353         if (getProperties() == NULL)
 354                 return NULL;
 355
 356         char* all_power_values_str = (char*)xbt_dict_get_or_null(getProperties(), "power_per_state");
 357
 358         if (all_power_values_str == NULL)
 359                 return NULL;
 360
 361
 362         power_range_list = xbt_dynar_new(sizeof(xbt_dynar_t), NULL);
 363         xbt_dynar_t all_power_values = xbt_str_split(all_power_values_str, ",");
 364
 365         pstate_nb = xbt_dynar_length(all_power_values);
 366         for (i=0; i< pstate_nb; i++)
 367         {
 368                 /* retrieve the power values associated with the current pstate */
 369                 current_power_values = xbt_str_split(xbt_dynar_get_as(all_power_values, i, char*), ":");
 370                 xbt_assert(xbt_dynar_length(current_power_values) > 1,
 371                                 "Power properties incorrectly defined - could not retrieve min and max power values for host %s",
 372                                 getName());
 373
 374                 /* min_power corresponds to the idle power (cpu load = 0) */
 375                 /* max_power is the power consumed at 100% cpu load       */
 376                 min_power = atof(xbt_dynar_get_as(current_power_values, 0, char*));
 377                 max_power = atof(xbt_dynar_get_as(current_power_values, 1, char*));
 378
 379                 power_tuple = xbt_dynar_new(sizeof(double), NULL);
 380                 xbt_dynar_push_as(power_tuple, double, min_power);
 381                 xbt_dynar_push_as(power_tuple, double, max_power);
 382
 383                 xbt_dynar_push_as(power_range_list, xbt_dynar_t, power_tuple);
 384                 xbt_dynar_free(&current_power_values);
 385         }
 386         xbt_dynar_free(&all_power_values);
 387         return power_range_list;
 388 }
 389
 390 /**
 391  * Computes the power consumed by the host according to the current pstate and processor load
 392  *
 393  */
 394 double CpuCas01Lmm::getCurrentWattsValue(double cpu_load)
 395 {
 396         xbt_dynar_t power_range_list = p_energy->power_range_watts_list;
 397
 398         if (power_range_list == NULL)
 399         {
 400                 XBT_DEBUG("No power range properties specified for host %s", getName());
 401                 return 0;
 402         }
 403         xbt_assert(xbt_dynar_length(power_range_list) == xbt_dynar_length(p_powerPeakList),
 404                                                 "The number of power ranges in the properties does not match the number of pstates for host %s",
 405                                                 getName());
 406
 407     /* retrieve the power values associated with the current pstate */
 408     xbt_dynar_t current_power_values = xbt_dynar_get_as(power_range_list, m_pstate, xbt_dynar_t);
 409
 410     /* min_power corresponds to the idle power (cpu load = 0) */
 411     /* max_power is the power consumed at 100% cpu load       */
 412     double min_power = xbt_dynar_get_as(current_power_values, 0, double);
 413     double max_power = xbt_dynar_get_as(current_power_values, 1, double);
 414     double power_slope = max_power - min_power;
 415
 416     double current_power = min_power + cpu_load * power_slope;
 417
 418         XBT_DEBUG("[get_current_watts] min_power=%f, max_power=%f, slope=%f", min_power, max_power, power_slope);
 419     XBT_DEBUG("[get_current_watts] Current power (watts) = %f, load = %f", current_power, cpu_load);
 420
 421         return current_power;
 422 }
 423
 424 /**
 425  * Updates the total energy consumed as the sum of the current energy and
 426  *                                               the energy consumed by the current action
 427  */
 428 void CpuCas01Lmm::updateEnergy(double cpu_load)
 429 {
 430   double start_time = p_energy->last_updated;
 431   double finish_time = surf_get_clock();
 432
 433   XBT_DEBUG("[cpu_update_energy] action time interval=(%f-%f), current power peak=%f, current pstate=%d",
 434                   start_time, finish_time, m_powerPeak, m_pstate);
 435   double current_energy = p_energy->total_energy;
 436   double action_energy = getCurrentWattsValue(cpu_load)*(finish_time-start_time);
 437
 438   p_energy->total_energy = current_energy + action_energy;
 439   p_energy->last_updated = finish_time;
 440
 441   XBT_DEBUG("[cpu_update_energy] old_energy_value=%f, action_energy_value=%f", current_energy, action_energy);
 442 }
 443
 444 double CpuCas01Lmm::getCurrentPowerPeak()
 445 {
 446   return m_powerPeak;
 447 }
 448
 449 double CpuCas01Lmm::getPowerPeakAt(int pstate_index)
 450 {
 451   xbt_dynar_t plist = p_powerPeakList;
 452   xbt_assert((pstate_index <= (int)xbt_dynar_length(plist)), "Invalid parameters (pstate index out of bounds)");
 453
 454   return xbt_dynar_get_as(plist, pstate_index, double);
 455 }
 456
 457 int CpuCas01Lmm::getNbPstates()
 458 {
 459   return xbt_dynar_length(p_powerPeakList);
 460 }
 461
 462 void CpuCas01Lmm::setPowerPeakAt(int pstate_index)
 463 {
 464   xbt_dynar_t plist = p_powerPeakList;
 465   xbt_assert((pstate_index <= (int)xbt_dynar_length(plist)), "Invalid parameters (pstate index out of bounds)");
 466
 467   double new_power_peak = xbt_dynar_get_as(plist, pstate_index, double);
 468   m_pstate = pstate_index;
 469   m_powerPeak = new_power_peak;
 470 }
 471
 472 double CpuCas01Lmm::getConsumedEnergy()
 473 {
 474   return p_energy->total_energy;
 475 }
 476
 477 /**********
 478  * Action *
 479  **********/
 480
 481 CpuCas01ActionLmm::CpuCas01ActionLmm(ModelPtr model_, double cost, bool failed, double power, lmm_constraint_t constraint)
 482  : Action(model_, cost, failed)
 483  , CpuActionLmm(lmm_variable_new(getModel()->getMaxminSystem(), static_cast<ActionLmmPtr>(this),
 484                         m_priority,
 485                 power, 1))
 486 {
 487   m_suspended = 0;     /* Should be useless because of the
 488                                                            calloc but it seems to help valgrind... */
 489
 490   if (getModel()->getUpdateMechanism() == UM_LAZY) {
 491     m_indexHeap = -1;
 492     m_lastUpdate = surf_get_clock();
 493     m_lastValue = 0.0;
 494   }
 495   lmm_expand(getModel()->getMaxminSystem(), constraint, getVariable(), 1.0);
 496 }
 497
 498
 499 /**
 500  * Update the CPU total energy for a finished action
 501  *
 502  */
 503 void CpuCas01ActionLmm::updateEnergy()
 504 {
 505   CpuCas01LmmPtr cpu  = static_cast<CpuCas01LmmPtr>(lmm_constraint_id(lmm_get_cnst_from_var
 506                                                                                   (getModel()->getMaxminSystem(),
 507                                                                                                   getVariable(), 0)));
 508
 509   if(cpu->p_energy->last_updated < surf_get_clock()) {
 510         double load = lmm_constraint_get_usage(cpu->constraint()) / cpu->m_powerPeak;
 511     cpu->updateEnergy(load);
 512   }
 513 }