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_pstate_number, #MSG_host_set_pstate(), #MSG_host_get_power_peak_at().
+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<CpuPtr, CpuEnergyPtr> *surf_energy=NULL;
+std::map<Cpu*, CpuEnergy*> *surf_energy=NULL;
-static void energyCpuCreatedCallback(CpuPtr cpu){
+static void energyCpuCreatedCallback(Cpu *cpu){
(*surf_energy)[cpu] = new CpuEnergy(cpu);
}
-static void update_consumption_running(CpuPtr cpu, CpuEnergyPtr cpu_energy) {
+
+/* Computes the consumption so far. Called lazily on need. */
+static void update_consumption(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 previous_energy = cpu_energy->total_energy;
- double energy_this_step = cpu_energy->getCurrentWattsValue(cpu_load)*(finish_time-start_time);
-
- 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, previous_energy, energy_this_step);
-}
-static void update_consumption_off(CpuPtr cpu, CpuEnergyPtr cpu_energy) {
- double start_time = cpu_energy->last_updated;
- double finish_time = surf_get_clock();
+ double instantaneous_consumption;
+ if (cpu->getState() == SURF_RESOURCE_OFF)
+ instantaneous_consumption = cpu_energy->watts_off;
+ else
+ instantaneous_consumption = cpu_energy->getCurrentWattsValue(cpu_load);
- double previous_energy = cpu_energy->total_energy;
- double energy_this_step = cpu_energy->watts_off*(finish_time-start_time);
+ double energy_this_step = instantaneous_consumption*(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);
+ 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, previous_energy, energy_this_step);
}
-static void energyCpuDestructedCallback(CpuPtr cpu){
- std::map<CpuPtr, CpuEnergyPtr>::iterator cpu_energy_it = surf_energy->find(cpu);
+static void energyCpuDestructedCallback(Cpu *cpu){
+ std::map<Cpu*, CpuEnergy*>::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;
- if (cpu->getState() == SURF_RESOURCE_OFF)
- update_consumption_off(cpu, cpu_energy);
- else
- update_consumption_running(cpu, cpu_energy);
+ CpuEnergy *cpu_energy = cpu_energy_it->second;
+ update_consumption(cpu, cpu_energy);
+
+ // Do nothing if that's a virtual CPU, only act for physical CPUs
+ if(cpu->getPhysicalCPU() == NULL){
+ 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);
+ }
- 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);
- if(cpu_energy->last_updated < surf_get_clock()) {
- update_consumption_running(cpu, cpu_energy);
- }
+ CpuEnergy *cpu_energy = (*surf_energy)[cpu];
+
+ if(cpu_energy->last_updated < surf_get_clock())
+ update_consumption(cpu, cpu_energy);
}
-static void energyStateChangedCallback(CpuPtr cpu, e_surf_resource_state_t oldState, e_surf_resource_state_t newState){
- CpuEnergyPtr cpu_energy = (*surf_energy)[cpu];
+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);
- }
+ if(cpu_energy->last_updated < surf_get_clock())
+ update_consumption(cpu, cpu_energy);
}
static void sg_energy_plugin_exit()
*/
void sg_energy_plugin_init() {
if (surf_energy == NULL) {
- surf_energy = new std::map<CpuPtr, CpuEnergyPtr>();
+ surf_energy = new std::map<Cpu*, CpuEnergy*>();
surf_callback_connect(cpuCreatedCallbacks, energyCpuCreatedCallback);
surf_callback_connect(cpuDestructedCallbacks, energyCpuDestructedCallback);
surf_callback_connect(cpuActionStateChangedCallbacks, energyCpuActionStateChangedCallback);
/**
*
*/
-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();
xbt_dynar_free(&power_range_watts_list);
}
+
+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<CpuCas01*>(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<CpuCas01*>(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
*
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<CpuCas01Ptr>(cpu)->getPState(), xbt_dynar_t);
+ xbt_dynar_t current_power_values = xbt_dynar_get_as(power_range_list, static_cast<CpuCas01*>(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 */
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;
+
+ if(last_updated < surf_get_clock())
+ update_consumption(cpu, this);
+ return total_energy;
+
}
xbt_dynar_t CpuEnergy::getWattsRangeList()
