src/surf/plugins/energy.cpp

   1 /* Copyright (c) 2010, 2012-2014. 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 "energy.hpp"
   8 #include "../cpu_cas01.hpp"
   9
  10 /** @addtogroup SURF_plugin_energy
  11  *
  12  *
  13  *  BlaBla energy
  14  */
  15
  16 XBT_LOG_EXTERNAL_CATEGORY(surf_kernel);
  17 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_energy, surf,
  18                                 "Logging specific to the SURF energy plugin");
  19
  20 std::map<CpuPtr, CpuEnergyPtr> *surf_energy=NULL;
  21
  22 static void energyCpuCreatedCallback(CpuPtr cpu){
  23   (*surf_energy)[cpu] = new CpuEnergy(cpu);
  24 }
  25
  26 static void energyCpuDestructedCallback(CpuPtr cpu){
  27   std::map<CpuPtr, CpuEnergyPtr>::iterator cpuIt = surf_energy->find(cpu);
  28   xbt_assert(cpuIt != surf_energy->end(), "The cpu is not in surf_energy.");
  29   XBT_INFO("Total energy (Joules) of host %s: %f", cpu->getName(), cpuIt->second->getConsumedEnergy());
  30   delete cpuIt->second;
  31   surf_energy->erase(cpuIt);
  32 }
  33
  34 static void energyCpuActionStateChangedCallback(CpuActionPtr action){
  35   CpuPtr cpu  = getActionCpu(action);
  36   CpuEnergyPtr cpu_energy = (*surf_energy)[cpu];
  37
  38   if(cpu_energy->last_updated < surf_get_clock()) {
  39         double cpu_load = lmm_constraint_get_usage(cpu->getConstraint()) / cpu->m_powerPeak;
  40     double start_time = cpu_energy->last_updated;
  41     double finish_time = surf_get_clock();
  42
  43     /*XBT_DEBUG("[cpu_update_energy] action time interval=(%f-%f), current power peak=%f, current pstate=%d",
  44                   start_time, finish_time, cpu->m_powerPeak, cpu->m_pstate);*/
  45     XBT_DEBUG("[cpu_update_energy] action time interval=(%f-%f), current power peak=%f",
  46                   start_time, finish_time, cpu->m_powerPeak);
  47     double current_energy = cpu_energy->total_energy;
  48     double action_energy = cpu_energy->getCurrentWattsValue(cpu_load)*(finish_time-start_time);
  49
  50     cpu_energy->total_energy = current_energy + action_energy;
  51     cpu_energy->last_updated = finish_time;
  52
  53     XBT_DEBUG("[cpu_update_energy] old_energy_value=%f, action_energy_value=%f", current_energy, action_energy);
  54   }
  55 }
  56
  57 static void sg_energy_plugin_exit()
  58 {
  59   delete surf_energy;
  60   surf_energy = NULL;
  61 }
  62
  63 /** \ingroup SURF_plugin_energy
  64  * \brief Enable energy plugin
  65  * \details Enable energy plugin to get joules consumption of each cpu.
  66  */
  67 void sg_energy_plugin_init() {
  68   if (surf_energy == NULL) {
  69     surf_energy = new std::map<CpuPtr, CpuEnergyPtr>();
  70     surf_callback_connect(cpuCreatedCallbacks, energyCpuCreatedCallback);
  71     surf_callback_connect(cpuDestructedCallbacks, energyCpuDestructedCallback);
  72     surf_callback_connect(cpuActionStateChangedCallbacks, energyCpuActionStateChangedCallback);
  73     surf_callback_connect(surfExitCallbacks, sg_energy_plugin_exit);
  74   }
  75 }
  76
  77 /**
  78  *
  79  */
  80 CpuEnergy::CpuEnergy(CpuPtr ptr)
  81  : cpu(ptr)
  82 {
  83   total_energy = 0;
  84   power_range_watts_list = getWattsRangeList();
  85   last_updated = surf_get_clock();
  86 }
  87
  88 CpuEnergy::~CpuEnergy(){
  89   unsigned int iter;
  90   xbt_dynar_t power_tuple = NULL;
  91   xbt_dynar_foreach(power_range_watts_list, iter, power_tuple)
  92     xbt_dynar_free(&power_tuple);
  93   xbt_dynar_free(&power_range_watts_list);
  94 }
  95
  96
  97 /**
  98  * Computes the power consumed by the host according to the current pstate and processor load
  99  *
 100  */
 101 double CpuEnergy::getCurrentWattsValue(double cpu_load)
 102 {
 103         xbt_dynar_t power_range_list = power_range_watts_list;
 104
 105         if (power_range_list == NULL)
 106         {
 107                 XBT_DEBUG("No power range properties specified for host %s", cpu->getName());
 108                 return 0;
 109         }
 110         /*xbt_assert(xbt_dynar_length(power_range_list) == xbt_dynar_length(cpu->p_powerPeakList),
 111                                                 "The number of power ranges in the properties does not match the number of pstates for host %s",
 112                                                 cpu->getName());*/
 113
 114     /* retrieve the power values associated with the current pstate */
 115     xbt_dynar_t current_power_values = xbt_dynar_get_as(power_range_list, static_cast<CpuCas01Ptr>(cpu)->m_pstate, xbt_dynar_t);
 116
 117     /* min_power corresponds to the idle power (cpu load = 0) */
 118     /* max_power is the power consumed at 100% cpu load       */
 119     double min_power = xbt_dynar_get_as(current_power_values, 0, double);
 120     double max_power = xbt_dynar_get_as(current_power_values, 1, double);
 121     double power_slope = max_power - min_power;
 122
 123     double current_power = min_power + cpu_load * power_slope;
 124
 125         XBT_DEBUG("[get_current_watts] min_power=%f, max_power=%f, slope=%f", min_power, max_power, power_slope);
 126     XBT_DEBUG("[get_current_watts] Current power (watts) = %f, load = %f", current_power, cpu_load);
 127
 128         return current_power;
 129 }
 130
 131 double CpuEnergy::getConsumedEnergy()
 132 {
 133   return total_energy;
 134 }
 135
 136 xbt_dynar_t CpuEnergy::getWattsRangeList()
 137 {
 138         xbt_dynar_t power_range_list;
 139         xbt_dynar_t power_tuple;
 140         int i = 0, pstate_nb=0;
 141         xbt_dynar_t current_power_values;
 142         double min_power, max_power;
 143
 144         if (cpu->getProperties() == NULL)
 145                 return NULL;
 146
 147         char* all_power_values_str = (char*)xbt_dict_get_or_null(cpu->getProperties(), "power_per_state");
 148
 149         if (all_power_values_str == NULL)
 150                 return NULL;
 151
 152
 153         power_range_list = xbt_dynar_new(sizeof(xbt_dynar_t), NULL);
 154         xbt_dynar_t all_power_values = xbt_str_split(all_power_values_str, ",");
 155
 156         pstate_nb = xbt_dynar_length(all_power_values);
 157         for (i=0; i< pstate_nb; i++)
 158         {
 159                 /* retrieve the power values associated with the current pstate */
 160                 current_power_values = xbt_str_split(xbt_dynar_get_as(all_power_values, i, char*), ":");
 161                 xbt_assert(xbt_dynar_length(current_power_values) > 1,
 162                                 "Power properties incorrectly defined - could not retrieve min and max power values for host %s",
 163                                 cpu->getName());
 164
 165                 /* min_power corresponds to the idle power (cpu load = 0) */
 166                 /* max_power is the power consumed at 100% cpu load       */
 167                 min_power = atof(xbt_dynar_get_as(current_power_values, 0, char*));
 168                 max_power = atof(xbt_dynar_get_as(current_power_values, 1, char*));
 169
 170                 power_tuple = xbt_dynar_new(sizeof(double), NULL);
 171                 xbt_dynar_push_as(power_tuple, double, min_power);
 172                 xbt_dynar_push_as(power_tuple, double, max_power);
 173
 174                 xbt_dynar_push_as(power_range_list, xbt_dynar_t, power_tuple);
 175                 xbt_dynar_free(&current_power_values);
 176         }
 177         xbt_dynar_free(&all_power_values);
 178         return power_range_list;
 179 }