X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/3b96c9838e06560c684ad8bccc0db226ac4f9616..68997ed0ab7577d77738903148eeac6822d6b21a:/src/surf/plugins/energy.cpp diff --git a/src/surf/plugins/energy.cpp b/src/surf/plugins/energy.cpp index 0ec679a93b..9a6cc76ed7 100644 --- a/src/surf/plugins/energy.cpp +++ b/src/surf/plugins/energy.cpp @@ -1,16 +1,14 @@ -/* Copyright (c) 2010, 2012-2015. The SimGrid Team. - * All rights reserved. */ +/* Copyright (c) 2010, 2012-2016. The SimGrid Team. All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it * under the terms of the license (GNU LGPL) which comes with this package. */ -#include - #include "simgrid/plugins/energy.h" #include "simgrid/simix.hpp" -#include "src/surf/plugins/energy.hpp" +#include "src/plugins/vm/VirtualMachineImpl.hpp" #include "src/surf/cpu_interface.hpp" -#include "src/surf/virtual_machine.hpp" +#include "src/surf/plugins/energy.hpp" +#include /** @addtogroup SURF_plugin_energy @@ -48,7 +46,7 @@ In this example, the idle consumption is 95 Watts, 93 Watts and 90 Watts in each 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(), simgrid#s4u#Host#set_pstate(), #MSG_host_get_power_peak_at(). +#MSG_host_get_nb_pstates(), simgrid#s4u#Host#setPstate(), #MSG_host_get_power_peak_at(). To simulate the energy-related elements, first call the simgrid#energy#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(). @@ -66,20 +64,30 @@ simgrid::xbt::Extension HostEnergy::EXTENSION_ID /* Computes the consumption so far. Called lazily on need. */ void HostEnergy::update() { - simgrid::surf::HostImpl* surf_host = host->extension(); double start_time = this->last_updated; double finish_time = surf_get_clock(); double cpu_load; - if (surf_host->cpu_->speed_.peak <= 0) + if (host->pimpl_cpu->getPstateSpeedCurrent() <= 0) // Some users declare a pstate of speed 0 flops (e.g., to model boot time). // We consider that the machine is then fully loaded. That's arbitrary but it avoids a NaN cpu_load = 1; else - cpu_load = lmm_constraint_get_usage(surf_host->cpu_->getConstraint()) / surf_host->cpu_->speed_.peak; + cpu_load = lmm_constraint_get_usage(host->pimpl_cpu->getConstraint()) / host->pimpl_cpu->getPstateSpeedCurrent(); + + /** Divide by the number of cores here **/ + cpu_load /= host->pimpl_cpu->coreCount(); - if (cpu_load > 1) // A machine with a load > 1 consumes as much as a fully loaded machine, not mores + if (cpu_load > 1) // A machine with a load > 1 consumes as much as a fully loaded machine, not more cpu_load = 1; + /* The problem with this model is that the load is always 0 or 1, never something less. + * Another possibility could be to model the total energy as + * + * X/(X+Y)*W_idle + Y/(X+Y)*W_burn + * + * where X is the amount of ideling cores, and Y the amount of computing cores. + */ + double previous_energy = this->total_energy; double instantaneous_consumption; @@ -93,8 +101,9 @@ void HostEnergy::update() this->total_energy = previous_energy + energy_this_step; this->last_updated = finish_time; - XBT_DEBUG("[update_energy of %s] period=[%.2f-%.2f]; current power peak=%.0E flop/s; consumption change: %.2f J -> %.2f J", - surf_host->getName(), start_time, finish_time, surf_host->cpu_->speed_.peak, previous_energy, energy_this_step); + XBT_DEBUG( + "[update_energy of %s] period=[%.2f-%.2f]; current power peak=%.0E flop/s; consumption change: %.2f J -> %.2f J", + host->name().c_str(), start_time, finish_time, host->pimpl_cpu->speed_.peak, previous_energy, energy_this_step); } HostEnergy::HostEnergy(simgrid::s4u::Host *ptr) : host(ptr), last_updated(surf_get_clock()) @@ -118,13 +127,13 @@ HostEnergy::~HostEnergy()=default; double HostEnergy::getWattMinAt(int pstate) { xbt_assert(!power_range_watts_list.empty(), "No power range properties specified for host %s", host->name().c_str()); - return power_range_watts_list[pstate].first; + return power_range_watts_list[pstate].min; } double HostEnergy::getWattMaxAt(int pstate) { xbt_assert(!power_range_watts_list.empty(), "No power range properties specified for host %s", host->name().c_str()); - return power_range_watts_list[pstate].second; + return power_range_watts_list[pstate].max; } /** @brief Computes the power consumed by the host according to the current pstate and processor load */ @@ -134,11 +143,39 @@ double HostEnergy::getCurrentWattsValue(double cpu_load) /* min_power corresponds to the idle power (cpu load = 0) */ /* max_power is the power consumed at 100% cpu load */ - auto range = power_range_watts_list.at(host->pstate()); - double min_power = range.first; - double max_power = range.second; - double power_slope = max_power - min_power; - double current_power = min_power + cpu_load * power_slope; + auto range = power_range_watts_list.at(host->pstate()); + double current_power = 0; + double min_power = 0; + double max_power = 0; + double power_slope = 0; + + if (cpu_load > 0) { /* Something is going on, the machine is not idle */ + double min_power = range.min; + double max_power = range.max; + + /** + * The min_power states how much we consume when only one single + * core is working. This means that when cpu_load == 1/coreCount, then + * current_power == min_power. + * + * The maximum must be reached when all cores are working (but 1 core was + * already accounted for by min_power) + * i.e., we need min_power + (maxCpuLoad-1/coreCount)*power_slope == max_power + * (maxCpuLoad is by definition 1) + */ + double power_slope; + int coreCount = host->coreCount(); + double coreReciprocal = static_cast(1) / static_cast(coreCount); + if (coreCount > 1) + power_slope = (max_power - min_power) / (1 - coreReciprocal); + else + power_slope = 0; // Should be 0, since max_power == min_power (in this case) + + current_power = min_power + (cpu_load - coreReciprocal) * power_slope; + } + else { /* Our machine is idle, take the dedicated value! */ + current_power = range.idle; + } XBT_DEBUG("[get_current_watts] min_power=%f, max_power=%f, slope=%f", min_power, max_power, power_slope); XBT_DEBUG("[get_current_watts] Current power (watts) = %f, load = %f", current_power, cpu_load); @@ -168,18 +205,22 @@ void HostEnergy::initWattsRangeList() for (int i=0; i< pstate_nb; i++) { /* retrieve the power values associated with the current pstate */ xbt_dynar_t current_power_values = xbt_str_split(xbt_dynar_get_as(all_power_values, i, char*), ":"); - xbt_assert(xbt_dynar_length(current_power_values) > 1, - "Power properties incorrectly defined - could not retrieve min and max power values for host %s", + xbt_assert(xbt_dynar_length(current_power_values) == 3, + "Power properties incorrectly defined - could not retrieve idle, min and max power values for host %s", host->name().c_str()); /* min_power corresponds to the idle power (cpu load = 0) */ /* max_power is the power consumed at 100% cpu load */ + char *msg_idle = bprintf("Invalid idle value for pstate %d on host %s: %%s", i, host->name().c_str()); char *msg_min = bprintf("Invalid min value for pstate %d on host %s: %%s", i, host->name().c_str()); - char *msg_max = bprintf("Invalid min value for pstate %d on host %s: %%s", i, host->name().c_str()); - power_range_watts_list.push_back(power_range( - xbt_str_parse_double(xbt_dynar_get_as(current_power_values, 0, char*), msg_min), - xbt_str_parse_double(xbt_dynar_get_as(current_power_values, 1, char*), msg_max) - )); + char *msg_max = bprintf("Invalid max value for pstate %d on host %s: %%s", i, host->name().c_str()); + PowerRange range( + xbt_str_parse_double(xbt_dynar_get_as(current_power_values, 0, char*), msg_idle), + xbt_str_parse_double(xbt_dynar_get_as(current_power_values, 1, char*), msg_min), + xbt_str_parse_double(xbt_dynar_get_as(current_power_values, 2, char*), msg_max) + ); + power_range_watts_list.push_back(range); + xbt_free(msg_idle); xbt_free(msg_min); xbt_free(msg_max); @@ -193,8 +234,7 @@ void HostEnergy::initWattsRangeList() /* **************************** events callback *************************** */ static void onCreation(simgrid::s4u::Host& host) { - simgrid::surf::HostImpl* surf_host = host.extension(); - if (dynamic_cast(surf_host)) // Ignore virtual machines + if (dynamic_cast(&host)) // Ignore virtual machines return; host.extension_set(new HostEnergy(&host)); } @@ -205,10 +245,10 @@ static void onActionStateChange(simgrid::surf::CpuAction *action, simgrid::surf: sg_host_t sghost = sg_host_by_name(name); if(sghost == nullptr) continue; - simgrid::surf::HostImpl *host = sghost->extension(); - simgrid::surf::VirtualMachine *vm = dynamic_cast(host); + simgrid::surf::HostImpl* host = sghost->pimpl_; + simgrid::s4u::VirtualMachine* vm = dynamic_cast(sghost); if (vm) // If it's a VM, take the corresponding PM - host = vm->getPm()->extension(); + host = vm->pimpl_vm_->getPm()->pimpl_; HostEnergy *host_energy = host->piface_->extension(); @@ -218,8 +258,7 @@ static void onActionStateChange(simgrid::surf::CpuAction *action, simgrid::surf: } static void onHostStateChange(simgrid::s4u::Host &host) { - simgrid::surf::HostImpl* surf_host = host.extension(); - if (dynamic_cast(surf_host)) // Ignore virtual machines + if (dynamic_cast(&host)) // Ignore virtual machines return; HostEnergy *host_energy = host.extension(); @@ -230,8 +269,7 @@ static void onHostStateChange(simgrid::s4u::Host &host) { static void onHostDestruction(simgrid::s4u::Host& host) { // Ignore virtual machines - simgrid::surf::HostImpl* surf_host = host.extension(); - if (dynamic_cast(surf_host)) + if (dynamic_cast(&host)) return; HostEnergy *host_energy = host.extension(); host_energy->update();