src/surf/cpu_cas01.cpp

   1 /* Copyright (c) 2009-2011, 2013-2016. 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 #include "src/surf/platform.hpp"
  12
  13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_cas, surf_cpu,
  14                                 "Logging specific to the SURF CPU IMPROVED module");
  15
  16 /*********
  17  * Model *
  18  *********/
  19 void surf_cpu_model_init_Cas01()
  20 {
  21   xbt_assert(!surf_cpu_model_pm);
  22   xbt_assert(!surf_cpu_model_vm);
  23
  24   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
  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   xbt_dynar_push(all_existing_models, &surf_cpu_model_pm);
  32
  33   surf_cpu_model_vm  = new simgrid::surf::CpuCas01Model();
  34   xbt_dynar_push(all_existing_models, &surf_cpu_model_vm);
  35
  36   simgrid::surf::on_postparse.connect(simgrid::surf::cpu_add_traces);
  37 }
  38
  39 namespace simgrid {
  40 namespace surf {
  41
  42 CpuCas01Model::CpuCas01Model() : simgrid::surf::CpuModel()
  43 {
  44   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
  45   int select = xbt_cfg_get_boolean(_sg_cfg_set, "cpu/maxmin_selective_update");
  46
  47   if (!strcmp(optim, "Full")) {
  48     p_updateMechanism = UM_FULL;
  49     m_selectiveUpdate = select;
  50   } else if (!strcmp(optim, "Lazy")) {
  51     p_updateMechanism = UM_LAZY;
  52     m_selectiveUpdate = 1;
  53     xbt_assert((select == 1)
  54                ||
  55                (xbt_cfg_is_default_value
  56                 (_sg_cfg_set, "cpu/maxmin_selective_update")),
  57                "Disabling selective update while using the lazy update mechanism is dumb!");
  58   } else {
  59     xbt_die("Unsupported optimization (%s) for this model", optim);
  60   }
  61
  62   p_cpuRunningActionSetThatDoesNotNeedBeingChecked = new ActionList();
  63
  64   p_maxminSystem = lmm_system_new(m_selectiveUpdate);
  65
  66   if (getUpdateMechanism() == UM_LAZY) {
  67     p_actionHeap = xbt_heap_new(8, NULL);
  68     xbt_heap_set_update_callback(p_actionHeap,  surf_action_lmm_update_index_heap);
  69     p_modifiedSet = new ActionLmmList();
  70     p_maxminSystem->keep_track = p_modifiedSet;
  71   }
  72 }
  73
  74 CpuCas01Model::~CpuCas01Model()
  75 {
  76   lmm_system_free(p_maxminSystem);
  77   p_maxminSystem = NULL;
  78
  79   if (p_actionHeap)
  80     xbt_heap_free(p_actionHeap);
  81   delete p_modifiedSet;
  82
  83   surf_cpu_model_pm = NULL;
  84
  85   delete p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
  86 }
  87
  88 Cpu *CpuCas01Model::createCpu(simgrid::s4u::Host *host, xbt_dynar_t speedPeak,
  89                                   int pstate, double speedScale,
  90                           tmgr_trace_t speedTrace, int core,
  91                           int initiallyOn,
  92                           tmgr_trace_t state_trace)
  93 {
  94   xbt_assert(xbt_dynar_getfirst_as(speedPeak, double) > 0.0,
  95       "Speed has to be >0.0. Did you forget to specify the mandatory power attribute?");
  96   xbt_assert(core > 0, "Invalid number of cores %d. Must be larger than 0", core);
  97   Cpu *cpu = new CpuCas01(this, host, speedPeak, pstate, speedScale, speedTrace, core, initiallyOn, state_trace);
  98   return cpu;
  99 }
 100
 101 double CpuCas01Model::shareResourcesFull(double /*now*/)
 102 {
 103   return Model::shareResourcesMaxMin(getRunningActionSet(),
 104                              p_maxminSystem, lmm_solve);
 105 }
 106
 107 void CpuCas01Model::addTraces()
 108 {
 109   xbt_dict_cursor_t cursor = NULL;
 110   char *trace_name, *elm;
 111   static int called = 0;
 112   if (called)
 113     return;
 114   called = 1;
 115
 116   /* connect all traces relative to hosts */
 117   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 118     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 119     CpuCas01 *host = static_cast<CpuCas01*>(sg_host_by_name(elm)->pimpl_cpu);
 120
 121     xbt_assert(host, "Host %s undefined", elm);
 122     xbt_assert(trace, "Trace %s undefined", trace_name);
 123
 124     host->setStateEvent(tmgr_history_add_trace(history, trace, 0.0, 0, host));
 125   }
 126
 127   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 128     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 129     CpuCas01 *host = static_cast<CpuCas01*>(sg_host_by_name(elm)->pimpl_cpu);
 130
 131     xbt_assert(host, "Host %s undefined", elm);
 132     xbt_assert(trace, "Trace %s undefined", trace_name);
 133
 134     host->setPowerEvent(tmgr_history_add_trace(history, trace, 0.0, 0, host));
 135   }
 136 }
 137
 138 /************
 139  * Resource *
 140  ************/
 141 CpuCas01::CpuCas01(CpuCas01Model *model, simgrid::s4u::Host *host, xbt_dynar_t speedPeak,
 142                          int pstate, double speedScale, tmgr_trace_t speedTrace, int core,
 143                          int initiallyOn, tmgr_trace_t stateTrace)
 144 : Cpu(model, host,
 145         lmm_constraint_new(model->getMaxminSystem(), this, core * speedScale * xbt_dynar_get_as(speedPeak, pstate, double)),
 146         speedPeak, pstate,
 147         core, xbt_dynar_get_as(speedPeak, pstate, double), speedScale,
 148     initiallyOn) {
 149   p_speedEvent = NULL;
 150
 151   XBT_DEBUG("CPU create: peak=%f, pstate=%d", m_speedPeak, m_pstate);
 152
 153   m_core = core;
 154   if (speedTrace)
 155     p_speedEvent = tmgr_history_add_trace(history, speedTrace, 0.0, 0, this);
 156
 157   if (stateTrace)
 158     p_stateEvent = tmgr_history_add_trace(history, stateTrace, 0.0, 0, this);
 159 }
 160
 161 CpuCas01::~CpuCas01()
 162 {
 163   if (getModel() == surf_cpu_model_pm)
 164     xbt_dynar_free(&p_speedPeakList);
 165 }
 166
 167 void CpuCas01::setStateEvent(tmgr_trace_event_t stateEvent)
 168 {
 169   p_stateEvent = stateEvent;
 170 }
 171
 172 void CpuCas01::setPowerEvent(tmgr_trace_event_t powerEvent)
 173 {
 174   p_speedEvent = powerEvent;
 175 }
 176
 177 xbt_dynar_t CpuCas01::getSpeedPeakList(){
 178   return p_speedPeakList;
 179 }
 180
 181 bool CpuCas01::isUsed()
 182 {
 183   return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
 184 }
 185
 186 /** @brief take into account changes of speed (either load or max) */
 187 void CpuCas01::onSpeedChange() {
 188         lmm_variable_t var = NULL;
 189         lmm_element_t elem = NULL;
 190
 191     lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(),
 192                                 m_core * m_speedScale * m_speedPeak);
 193     while ((var = lmm_get_var_from_cnst
 194             (getModel()->getMaxminSystem(), getConstraint(), &elem))) {
 195       CpuCas01Action *action = static_cast<CpuCas01Action*>(lmm_variable_id(var));
 196
 197       lmm_update_variable_bound(getModel()->getMaxminSystem(),
 198                                 action->getVariable(),
 199                                 m_speedScale * m_speedPeak);
 200     }
 201
 202         Cpu::onSpeedChange();
 203 }
 204
 205 void CpuCas01::updateState(tmgr_trace_event_t event_type, double value, double date)
 206 {
 207   lmm_variable_t var = NULL;
 208   lmm_element_t elem = NULL;
 209
 210   if (event_type == p_speedEvent) {
 211         /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 212         xbt_assert(m_core == 1, "FIXME: add speed scaling code also for constraint_core[i]");
 213
 214     m_speedScale = value;
 215     onSpeedChange();
 216
 217     if (tmgr_trace_event_free(event_type))
 218       p_speedEvent = NULL;
 219   } else if (event_type == p_stateEvent) {
 220         /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 221     xbt_assert(m_core == 1, "FIXME: add state change code also for constraint_core[i]");
 222
 223     if (value > 0) {
 224       if(isOff())
 225         xbt_dynar_push_as(host_that_restart, char*, (char *)getName());
 226       turnOn();
 227     } else {
 228       lmm_constraint_t cnst = getConstraint();
 229
 230       turnOff();
 231
 232       while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), cnst, &elem))) {
 233         Action *action = static_cast<Action*>(lmm_variable_id(var));
 234
 235         if (action->getState() == SURF_ACTION_RUNNING ||
 236             action->getState() == SURF_ACTION_READY ||
 237             action->getState() == SURF_ACTION_NOT_IN_THE_SYSTEM) {
 238           action->setFinishTime(date);
 239           action->setState(SURF_ACTION_FAILED);
 240         }
 241       }
 242     }
 243     if (tmgr_trace_event_free(event_type))
 244       p_stateEvent = NULL;
 245   } else {
 246     XBT_CRITICAL("Unknown event ! \n");
 247     xbt_abort();
 248   }
 249
 250   return;
 251 }
 252
 253 CpuAction *CpuCas01::execute(double size)
 254 {
 255
 256   XBT_IN("(%s,%g)", getName(), size);
 257   CpuCas01Action *action = new CpuCas01Action(getModel(), size, isOff(),
 258                                                               m_speedScale * m_speedPeak, getConstraint());
 259
 260   XBT_OUT();
 261   return action;
 262 }
 263
 264 CpuAction *CpuCas01::sleep(double duration)
 265 {
 266   if (duration > 0)
 267     duration = MAX(duration, sg_surf_precision);
 268
 269   XBT_IN("(%s,%g)", getName(), duration);
 270   CpuCas01Action *action = new CpuCas01Action(getModel(), 1.0, isOff(),
 271                                                       m_speedScale * m_speedPeak, getConstraint());
 272
 273
 274   // FIXME: sleep variables should not consume 1.0 in lmm_expand
 275   action->m_maxDuration = duration;
 276   action->m_suspended = 2;
 277   if (duration == NO_MAX_DURATION) {
 278     /* Move to the *end* of the corresponding action set. This convention
 279        is used to speed up update_resource_state  */
 280         action->getStateSet()->erase(action->getStateSet()->iterator_to(*action));
 281     action->p_stateSet = static_cast<CpuCas01Model*>(getModel())->p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
 282     action->getStateSet()->push_back(*action);
 283   }
 284
 285   lmm_update_variable_weight(getModel()->getMaxminSystem(),
 286                              action->getVariable(), 0.0);
 287   if (getModel()->getUpdateMechanism() == UM_LAZY) {     // remove action from the heap
 288     action->heapRemove(getModel()->getActionHeap());
 289     // this is necessary for a variable with weight 0 since such
 290     // variables are ignored in lmm and we need to set its max_duration
 291     // correctly at the next call to share_resources
 292     getModel()->getModifiedSet()->push_front(*action);
 293   }
 294
 295   XBT_OUT();
 296   return action;
 297 }
 298
 299 /**********
 300  * Action *
 301  **********/
 302
 303 CpuCas01Action::CpuCas01Action(Model *model, double cost, bool failed, double speed, lmm_constraint_t constraint)
 304  : CpuAction(model, cost, failed,
 305                      lmm_variable_new(model->getMaxminSystem(), this,
 306                      1.0, speed, 1))
 307 {
 308   if (model->getUpdateMechanism() == UM_LAZY) {
 309     m_indexHeap = -1;
 310     m_lastUpdate = surf_get_clock();
 311     m_lastValue = 0.0;
 312   }
 313   lmm_expand(model->getMaxminSystem(), constraint, getVariable(), 1.0);
 314 }
 315
 316 }
 317 }