src/surf/cpu_cas01.cpp

   1 /* Copyright (c) 2009-2011, 2013-2015. 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.hpp"
  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  * Model *
  17  *********/
  18 void surf_cpu_model_init_Cas01()
  19 {
  20   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
  21
  22   xbt_assert(!surf_cpu_model_pm);
  23   xbt_assert(!surf_cpu_model_vm);
  24
  25   if (!strcmp(optim, "TI")) {
  26     surf_cpu_model_init_ti();
  27     return;
  28   }
  29
  30   surf_cpu_model_pm = new simgrid::surf::CpuCas01Model();
  31   surf_cpu_model_vm  = new simgrid::surf::CpuCas01Model();
  32
  33   sg_platf_postparse_add_cb(simgrid::surf::cpu_add_traces);
  34
  35   simgrid::surf::Model *model_pm = surf_cpu_model_pm;
  36   simgrid::surf::Model *model_vm = surf_cpu_model_vm;
  37   xbt_dynar_push(all_existing_models, &model_pm);
  38   xbt_dynar_push(all_existing_models, &model_vm);
  39 }
  40
  41 namespace simgrid {
  42 namespace surf {
  43
  44 CpuCas01Model::CpuCas01Model() : simgrid::surf::CpuModel()
  45 {
  46   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
  47   int select = xbt_cfg_get_boolean(_sg_cfg_set, "cpu/maxmin_selective_update");
  48
  49   if (!strcmp(optim, "Full")) {
  50     p_updateMechanism = UM_FULL;
  51     m_selectiveUpdate = select;
  52   } else if (!strcmp(optim, "Lazy")) {
  53     p_updateMechanism = UM_LAZY;
  54     m_selectiveUpdate = 1;
  55     xbt_assert((select == 1)
  56                ||
  57                (xbt_cfg_is_default_value
  58                 (_sg_cfg_set, "cpu/maxmin_selective_update")),
  59                "Disabling selective update while using the lazy update mechanism is dumb!");
  60   } else {
  61     xbt_die("Unsupported optimization (%s) for this model", optim);
  62   }
  63
  64   p_cpuRunningActionSetThatDoesNotNeedBeingChecked = new ActionList();
  65
  66   if (getUpdateMechanism() == UM_LAZY) {
  67         shareResources = &CpuCas01Model::shareResourcesLazy;
  68         updateActionsState = &CpuCas01Model::updateActionsStateLazy;
  69
  70   } else if (getUpdateMechanism() == UM_FULL) {
  71         shareResources = &CpuCas01Model::shareResourcesFull;
  72         updateActionsState = &CpuCas01Model::updateActionsStateFull;
  73   } else
  74     xbt_die("Invalid cpu update mechanism!");
  75
  76   if (!p_maxminSystem) {
  77     p_maxminSystem = lmm_system_new(m_selectiveUpdate);
  78   }
  79
  80   if (getUpdateMechanism() == UM_LAZY) {
  81     p_actionHeap = xbt_heap_new(8, NULL);
  82     xbt_heap_set_update_callback(p_actionHeap,  surf_action_lmm_update_index_heap);
  83     p_modifiedSet = new ActionLmmList();
  84     p_maxminSystem->keep_track = p_modifiedSet;
  85   }
  86 }
  87
  88 CpuCas01Model::~CpuCas01Model()
  89 {
  90   lmm_system_free(p_maxminSystem);
  91   p_maxminSystem = NULL;
  92
  93   if (p_actionHeap)
  94     xbt_heap_free(p_actionHeap);
  95   delete p_modifiedSet;
  96
  97   surf_cpu_model_pm = NULL;
  98
  99   delete p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
 100 }
 101
 102 Cpu *CpuCas01Model::createCpu(simgrid::Host *host, xbt_dynar_t speedPeak,
 103                                   int pstate, double speedScale,
 104                           tmgr_trace_t speedTrace, int core,
 105                           e_surf_resource_state_t state_initial,
 106                           tmgr_trace_t state_trace)
 107 {
 108   xbt_assert(xbt_dynar_getfirst_as(speedPeak, double) > 0.0,
 109       "Speed has to be >0.0. Did you forget to specify the mandatory power attribute?");
 110   xbt_assert(core > 0, "Invalid number of cores %d. Must be larger than 0", core);
 111   Cpu *cpu = new CpuCas01(this, host, speedPeak, pstate, speedScale, speedTrace, core, state_initial, state_trace);
 112   return cpu;
 113 }
 114
 115 double CpuCas01Model::shareResourcesFull(double /*now*/)
 116 {
 117   return Model::shareResourcesMaxMin(getRunningActionSet(),
 118                              p_maxminSystem, lmm_solve);
 119 }
 120
 121 void CpuCas01Model::addTraces()
 122 {
 123   xbt_dict_cursor_t cursor = NULL;
 124   char *trace_name, *elm;
 125   static int called = 0;
 126   if (called)
 127     return;
 128   called = 1;
 129
 130   /* connect all traces relative to hosts */
 131   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 132     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 133     CpuCas01 *host = static_cast<CpuCas01*>(sg_host_by_name(elm)->p_cpu);
 134
 135     xbt_assert(host, "Host %s undefined", elm);
 136     xbt_assert(trace, "Trace %s undefined", trace_name);
 137
 138     host->setStateEvent(tmgr_history_add_trace(history, trace, 0.0, 0, host));
 139   }
 140
 141   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 142     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 143     CpuCas01 *host = static_cast<CpuCas01*>(sg_host_by_name(elm)->p_cpu);
 144
 145     xbt_assert(host, "Host %s undefined", elm);
 146     xbt_assert(trace, "Trace %s undefined", trace_name);
 147
 148     host->setPowerEvent(tmgr_history_add_trace(history, trace, 0.0, 0, host));
 149   }
 150 }
 151
 152 /************
 153  * Resource *
 154  ************/
 155 CpuCas01::CpuCas01(CpuCas01Model *model, simgrid::Host *host, xbt_dynar_t speedPeak,
 156                          int pstate, double speedScale, tmgr_trace_t speedTrace, int core,
 157                          e_surf_resource_state_t stateInitial, tmgr_trace_t stateTrace)
 158 : Cpu(model, host,
 159         lmm_constraint_new(model->getMaxminSystem(), this, core * speedScale * xbt_dynar_get_as(speedPeak, pstate, double)),
 160         speedPeak, pstate,
 161         core, xbt_dynar_get_as(speedPeak, pstate, double), speedScale,
 162     stateInitial) {
 163   p_speedEvent = NULL;
 164
 165   XBT_DEBUG("CPU create: peak=%f, pstate=%d", m_speedPeak, m_pstate);
 166
 167   m_core = core;
 168   if (speedTrace)
 169     p_speedEvent = tmgr_history_add_trace(history, speedTrace, 0.0, 0, this);
 170
 171   if (stateTrace)
 172     p_stateEvent = tmgr_history_add_trace(history, stateTrace, 0.0, 0, this);
 173 }
 174
 175 CpuCas01::~CpuCas01()
 176 {
 177   if (getModel() == surf_cpu_model_pm)
 178     xbt_dynar_free(&p_speedPeakList);
 179 }
 180
 181 void CpuCas01::setStateEvent(tmgr_trace_event_t stateEvent)
 182 {
 183   p_stateEvent = stateEvent;
 184 }
 185
 186 void CpuCas01::setPowerEvent(tmgr_trace_event_t powerEvent)
 187 {
 188   p_speedEvent = powerEvent;
 189 }
 190
 191 xbt_dynar_t CpuCas01::getSpeedPeakList(){
 192   return p_speedPeakList;
 193 }
 194
 195 bool CpuCas01::isUsed()
 196 {
 197   return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
 198 }
 199
 200 void CpuCas01::updateState(tmgr_trace_event_t event_type, double value, double date)
 201 {
 202   lmm_variable_t var = NULL;
 203   lmm_element_t elem = NULL;
 204
 205   if (event_type == p_speedEvent) {
 206         /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 207         xbt_assert(m_core == 1, "FIXME: add speed scaling code also for constraint_core[i]");
 208
 209     m_speedScale = value;
 210     lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(),
 211                                 m_core * m_speedScale *
 212                                 m_speedPeak);
 213     TRACE_surf_host_set_speed(date, getName(),
 214                               m_core * m_speedScale *
 215                               m_speedPeak);
 216     while ((var = lmm_get_var_from_cnst
 217             (getModel()->getMaxminSystem(), getConstraint(), &elem))) {
 218       CpuCas01Action *action = static_cast<CpuCas01Action*>(lmm_variable_id(var));
 219
 220       lmm_update_variable_bound(getModel()->getMaxminSystem(),
 221                                 action->getVariable(),
 222                                 m_speedScale * m_speedPeak);
 223     }
 224     if (tmgr_trace_event_free(event_type))
 225       p_speedEvent = NULL;
 226   } else if (event_type == p_stateEvent) {
 227         /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 228     xbt_assert(m_core == 1, "FIXME: add state change code also for constraint_core[i]");
 229
 230     if (value > 0) {
 231       if(getState() == SURF_RESOURCE_OFF)
 232         xbt_dynar_push_as(host_that_restart, char*, (char *)getName());
 233       setState(SURF_RESOURCE_ON);
 234     } else {
 235       lmm_constraint_t cnst = getConstraint();
 236
 237       setState(SURF_RESOURCE_OFF);
 238
 239       while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), cnst, &elem))) {
 240         Action *action = static_cast<Action*>(lmm_variable_id(var));
 241
 242         if (action->getState() == SURF_ACTION_RUNNING ||
 243             action->getState() == SURF_ACTION_READY ||
 244             action->getState() == SURF_ACTION_NOT_IN_THE_SYSTEM) {
 245           action->setFinishTime(date);
 246           action->setState(SURF_ACTION_FAILED);
 247         }
 248       }
 249     }
 250     if (tmgr_trace_event_free(event_type))
 251       p_stateEvent = NULL;
 252   } else {
 253     XBT_CRITICAL("Unknown event ! \n");
 254     xbt_abort();
 255   }
 256
 257   return;
 258 }
 259
 260 CpuAction *CpuCas01::execute(double size)
 261 {
 262
 263   XBT_IN("(%s,%g)", getName(), size);
 264   CpuCas01Action *action = new CpuCas01Action(getModel(), size, getState() != SURF_RESOURCE_ON,
 265                                                               m_speedScale * m_speedPeak, getConstraint());
 266
 267   XBT_OUT();
 268   return action;
 269 }
 270
 271 CpuAction *CpuCas01::sleep(double duration)
 272 {
 273   if (duration > 0)
 274     duration = MAX(duration, sg_surf_precision);
 275
 276   XBT_IN("(%s,%g)", getName(), duration);
 277   CpuCas01Action *action = new CpuCas01Action(getModel(), 1.0, getState() != SURF_RESOURCE_ON,
 278                                                       m_speedScale * m_speedPeak, getConstraint());
 279
 280
 281   // FIXME: sleep variables should not consume 1.0 in lmm_expand
 282   action->m_maxDuration = duration;
 283   action->m_suspended = 2;
 284   if (duration == NO_MAX_DURATION) {
 285     /* Move to the *end* of the corresponding action set. This convention
 286        is used to speed up update_resource_state  */
 287         action->getStateSet()->erase(action->getStateSet()->iterator_to(*action));
 288     action->p_stateSet = static_cast<CpuCas01Model*>(getModel())->p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
 289     action->getStateSet()->push_back(*action);
 290   }
 291
 292   lmm_update_variable_weight(getModel()->getMaxminSystem(),
 293                              action->getVariable(), 0.0);
 294   if (getModel()->getUpdateMechanism() == UM_LAZY) {     // remove action from the heap
 295     action->heapRemove(getModel()->getActionHeap());
 296     // this is necessary for a variable with weight 0 since such
 297     // variables are ignored in lmm and we need to set its max_duration
 298     // correctly at the next call to share_resources
 299     getModel()->getModifiedSet()->push_front(*action);
 300   }
 301
 302   XBT_OUT();
 303   return action;
 304 }
 305
 306 double CpuCas01::getCurrentPowerPeak()
 307 {
 308   return m_speedPeak;
 309 }
 310
 311 /**********
 312  * Action *
 313  **********/
 314
 315 CpuCas01Action::CpuCas01Action(Model *model, double cost, bool failed, double speed, lmm_constraint_t constraint)
 316  : CpuAction(model, cost, failed,
 317                      lmm_variable_new(model->getMaxminSystem(), this,
 318                      1.0, speed, 1))
 319 {
 320   if (model->getUpdateMechanism() == UM_LAZY) {
 321     m_indexHeap = -1;
 322     m_lastUpdate = surf_get_clock();
 323     m_lastValue = 0.0;
 324   }
 325   lmm_expand(model->getMaxminSystem(), constraint, getVariable(), 1.0);
 326 }
 327
 328 }
 329 }