X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/3e8e23939587e7ec646fba0cd59f23400507f255..5f441dda1cd3d2f43c2dc55fd16fbf27e8b184ef:/src/surf/plugins/energy.cpp diff --git a/src/surf/plugins/energy.cpp b/src/surf/plugins/energy.cpp index 1ade83fb24..ca80808b0f 100644 --- a/src/surf/plugins/energy.cpp +++ b/src/surf/plugins/energy.cpp @@ -8,54 +8,114 @@ #include "../cpu_cas01.hpp" /** @addtogroup SURF_plugin_energy - * - * - * This is the energy plugin, enabling to account not only for computation time, but also for the dissipated energy in the simulated platform. + + +This is the energy plugin, enabling to account not only for computation time, +but also for the dissipated energy in the simulated platform. + +The energy consumption of a CPU depends directly of its current load. Specify that consumption in your platform file as follows: + +\verbatim + + + + +\endverbatim + +The first property means that when your host is up and running, but without anything to do, it will dissipate 100 Watts. +If it's fully loaded, it will dissipate 200 Watts. If its load is at 50%, then it will dissipate 150 Watts. +The second property means that when your host is turned off, it will dissipate only 10 Watts (please note that these values are arbitrary). + +If your CPU is using pstates, then you can provide one consumption interval per pstate. + +\verbatim + + + + +\endverbatim + +That host has 3 levels of performance with the following performance: 100 Mflop/s, 50 Mflop/s or 20 Mflop/s. +It starts at pstate 0 (ie, at 100 Mflop/s). In this case, you have to specify one interval per pstate in the watt_per_state property. +In this example, the idle consumption is 95 Watts, 93 Watts and 90 Watts in each pstate while the CPU burn consumption are at 200 Watts, +170 Watts and 150 Watts respectively. + +To change the pstate of a given CPU, use the following functions: #MSG_host_get_nb_pstates(), #MSG_host_set_pstate(), #MSG_host_get_power_peak_at(). + +To simulate the energy-related elements, first call the #sg_energy_plugin_init() before your #MSG_init(), +and then use the following function to retrieve the consumption of a given host: #MSG_host_get_consumed_energy(). */ XBT_LOG_EXTERNAL_CATEGORY(surf_kernel); XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_energy, surf, "Logging specific to the SURF energy plugin"); -std::map *surf_energy=NULL; +std::map *surf_energy=NULL; -static void energyCpuCreatedCallback(CpuPtr cpu){ +static void energyCpuCreatedCallback(Cpu *cpu){ (*surf_energy)[cpu] = new CpuEnergy(cpu); } -static void update_consumption(CpuPtr cpu, CpuEnergyPtr cpu_energy) { +static void update_consumption_running(Cpu *cpu, CpuEnergy *cpu_energy) { double cpu_load = lmm_constraint_get_usage(cpu->getConstraint()) / cpu->m_powerPeak; double start_time = cpu_energy->last_updated; double finish_time = surf_get_clock(); - double current_energy = cpu_energy->total_energy; - double action_energy = cpu_energy->getCurrentWattsValue(cpu_load)*(finish_time-start_time); + double previous_energy = cpu_energy->total_energy; + double energy_this_step = cpu_energy->getCurrentWattsValue(cpu_load)*(finish_time-start_time); - cpu_energy->total_energy = current_energy + action_energy; + cpu_energy->total_energy = previous_energy + energy_this_step; cpu_energy->last_updated = finish_time; XBT_DEBUG("[cpu_update_energy] period=[%.2f-%.2f]; current power peak=%.0E flop/s; consumption change: %.2f J -> %.2f J", - start_time, finish_time, cpu->m_powerPeak, current_energy, action_energy); + start_time, finish_time, cpu->m_powerPeak, previous_energy, energy_this_step); +} +static void update_consumption_off(Cpu *cpu, CpuEnergy *cpu_energy) { + double start_time = cpu_energy->last_updated; + double finish_time = surf_get_clock(); + + double previous_energy = cpu_energy->total_energy; + double energy_this_step = cpu_energy->watts_off*(finish_time-start_time); + + cpu_energy->total_energy = previous_energy + energy_this_step; + cpu_energy->last_updated = finish_time; + + XBT_DEBUG("[cpu_update_energy] off period=[%.2f-%.2f]; consumption change: %.2f J -> %.2f J", + start_time, finish_time, previous_energy, energy_this_step); } -static void energyCpuDestructedCallback(CpuPtr cpu){ - std::map::iterator cpu_energy_it = surf_energy->find(cpu); +static void energyCpuDestructedCallback(Cpu *cpu){ + std::map::iterator cpu_energy_it = surf_energy->find(cpu); xbt_assert(cpu_energy_it != surf_energy->end(), "The cpu is not in surf_energy."); - CpuEnergyPtr cpu_energy = cpu_energy_it->second; - update_consumption(cpu, cpu_energy); + CpuEnergy *cpu_energy = cpu_energy_it->second; + if (cpu->getState() == SURF_RESOURCE_OFF) + update_consumption_off(cpu, cpu_energy); + else + update_consumption_running(cpu, cpu_energy); XBT_INFO("Total energy of host %s: %f Joules", cpu->getName(), cpu_energy->getConsumedEnergy()); delete cpu_energy_it->second; surf_energy->erase(cpu_energy_it); } -static void energyCpuActionStateChangedCallback(CpuActionPtr action, e_surf_action_state_t old, e_surf_action_state_t cur){ - CpuPtr cpu = getActionCpu(action); - CpuEnergyPtr cpu_energy = (*surf_energy)[cpu]; +static void energyCpuActionStateChangedCallback(CpuAction *action, e_surf_action_state_t old, e_surf_action_state_t cur){ + Cpu *cpu = getActionCpu(action); + CpuEnergy *cpu_energy = (*surf_energy)[cpu]; if(cpu_energy->last_updated < surf_get_clock()) { - update_consumption(cpu, cpu_energy); + update_consumption_running(cpu, cpu_energy); + } +} + +static void energyStateChangedCallback(Cpu *cpu, e_surf_resource_state_t oldState, e_surf_resource_state_t newState){ + CpuEnergy *cpu_energy = (*surf_energy)[cpu]; + + if(cpu_energy->last_updated < surf_get_clock()) { + if (oldState == SURF_RESOURCE_OFF) + update_consumption_off(cpu, cpu_energy); + else + update_consumption_running(cpu, cpu_energy); } } @@ -67,27 +127,37 @@ static void sg_energy_plugin_exit() /** \ingroup SURF_plugin_energy * \brief Enable energy plugin - * \details Enable energy plugin to get joules consumption of each cpu. + * \details Enable energy plugin to get joules consumption of each cpu. You should call this function before #MSG_init(). */ void sg_energy_plugin_init() { if (surf_energy == NULL) { - surf_energy = new std::map(); + surf_energy = new std::map(); surf_callback_connect(cpuCreatedCallbacks, energyCpuCreatedCallback); surf_callback_connect(cpuDestructedCallbacks, energyCpuDestructedCallback); surf_callback_connect(cpuActionStateChangedCallbacks, energyCpuActionStateChangedCallback); surf_callback_connect(surfExitCallbacks, sg_energy_plugin_exit); + surf_callback_connect(cpuStateChangedCallbacks, energyStateChangedCallback); } } /** * */ -CpuEnergy::CpuEnergy(CpuPtr ptr) - : cpu(ptr) +CpuEnergy::CpuEnergy(Cpu *ptr) { + cpu = ptr; total_energy = 0; power_range_watts_list = getWattsRangeList(); last_updated = surf_get_clock(); + + if (cpu->getProperties() != NULL) { + char* off_power_str = (char*)xbt_dict_get_or_null(cpu->getProperties(), "watt_off"); + if (off_power_str != NULL) + watts_off = atof(off_power_str); + else + watts_off = 0; + } + } CpuEnergy::~CpuEnergy(){ @@ -99,6 +169,21 @@ CpuEnergy::~CpuEnergy(){ } +double CpuEnergy::getWattMinAt(int pstate) { + xbt_dynar_t power_range_list = power_range_watts_list; + xbt_assert(power_range_watts_list, "No power range properties specified for host %s", cpu->getName()); + xbt_dynar_t current_power_values = xbt_dynar_get_as(power_range_list, static_cast(cpu)->getPState(), xbt_dynar_t); + double min_power = xbt_dynar_get_as(current_power_values, 0, double); + return min_power; +} +double CpuEnergy::getWattMaxAt(int pstate) { + xbt_dynar_t power_range_list = power_range_watts_list; + xbt_assert(power_range_watts_list, "No power range properties specified for host %s", cpu->getName()); + xbt_dynar_t current_power_values = xbt_dynar_get_as(power_range_list, static_cast(cpu)->getPState(), xbt_dynar_t); + double max_power = xbt_dynar_get_as(current_power_values, 1, double); + return max_power; +} + /** * Computes the power consumed by the host according to the current pstate and processor load * @@ -106,18 +191,10 @@ CpuEnergy::~CpuEnergy(){ double CpuEnergy::getCurrentWattsValue(double cpu_load) { xbt_dynar_t power_range_list = power_range_watts_list; - - if (power_range_list == NULL) - { - XBT_DEBUG("No power range properties specified for host %s", cpu->getName()); - return 0; - } - /*xbt_assert(xbt_dynar_length(power_range_list) == xbt_dynar_length(cpu->p_powerPeakList), - "The number of power ranges in the properties does not match the number of pstates for host %s", - cpu->getName());*/ + xbt_assert(power_range_watts_list, "No power range properties specified for host %s", cpu->getName()); /* retrieve the power values associated with the current pstate */ - xbt_dynar_t current_power_values = xbt_dynar_get_as(power_range_list, static_cast(cpu)->getPState(), xbt_dynar_t); + xbt_dynar_t current_power_values = xbt_dynar_get_as(power_range_list, static_cast(cpu)->getPState(), xbt_dynar_t); /* min_power corresponds to the idle power (cpu load = 0) */ /* max_power is the power consumed at 100% cpu load */ @@ -135,6 +212,12 @@ double CpuEnergy::getCurrentWattsValue(double cpu_load) double CpuEnergy::getConsumedEnergy() { + if(last_updated < surf_get_clock()) { + if (cpu->getState() == SURF_RESOURCE_OFF) + update_consumption_off(cpu, this); + else + update_consumption_running(cpu, this); + } return total_energy; }