void HostEnergy::update()
{
simgrid::surf::Host* surf_host = host->extension<simgrid::surf::Host>();
- double start_time = this->last_updated;
- double finish_time = surf_get_clock();
- double cpu_load;
- if (surf_host->p_cpu->m_speedPeak == 0)
- // Some users declare a pstate of speed 0 flops (eg 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->p_cpu->getConstraint())
+ double start_time = this->last_updated;
+ double finish_time = surf_get_clock();
+ double cpu_load;
+ if (surf_host->p_cpu->m_speedPeak == 0)
+ // Some users declare a pstate of speed 0 flops (eg 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->p_cpu->getConstraint())
/ surf_host->p_cpu->m_speedPeak;
- if (cpu_load > 1) // A machine with a load > 1 consumes as much as a fully loaded machine, not mores
- cpu_load = 1;
+ if (cpu_load > 1) // A machine with a load > 1 consumes as much as a fully loaded machine, not mores
+ cpu_load = 1;
- double previous_energy = this->total_energy;
+ double previous_energy = this->total_energy;
- double instantaneous_consumption;
- if (host->is_off())
- instantaneous_consumption = this->watts_off;
- else
- instantaneous_consumption = this->getCurrentWattsValue(cpu_load);
+ double instantaneous_consumption;
+ if (host->is_off())
+ instantaneous_consumption = this->watts_off;
+ else
+ instantaneous_consumption = this->getCurrentWattsValue(cpu_load);
- double energy_this_step = instantaneous_consumption*(finish_time-start_time);
+ double energy_this_step = instantaneous_consumption*(finish_time-start_time);
- this->total_energy = previous_energy + energy_this_step;
- this->last_updated = finish_time;
+ 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->p_cpu->m_speedPeak, 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",
+ surf_host->getName(), start_time, finish_time, surf_host->p_cpu->m_speedPeak, previous_energy, energy_this_step);
}
HostEnergy::HostEnergy(simgrid::s4u::Host *ptr) :
/** @brief Computes the power consumed by the host according to the current pstate and processor load */
double HostEnergy::getCurrentWattsValue(double cpu_load)
{
- xbt_assert(!power_range_watts_list.empty(),
+ xbt_assert(!power_range_watts_list.empty(),
"No power range properties specified for host %s", host->name().c_str());
/* min_power corresponds to the idle power (cpu load = 0) */
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;
+ double current_power = min_power + cpu_load * power_slope;
- 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);
+ 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);
- return current_power;
+ return current_power;
}
double HostEnergy::getConsumedEnergy()
{
- if (last_updated < surf_get_clock()) // We need to simcall this as it modifies the environment
- simgrid::simix::kernel(std::bind(&HostEnergy::update, this));
+ if (last_updated < surf_get_clock()) // We need to simcall this as it modifies the environment
+ simgrid::simix::kernel(std::bind(&HostEnergy::update, this));
- return total_energy;
+ return total_energy;
}
void HostEnergy::initWattsRangeList()
{
- if (host->properties() == NULL)
- return;
- char* all_power_values_str =
+ if (host->properties() == NULL)
+ return;
+ char* all_power_values_str =
(char*)xbt_dict_get_or_null(host->properties(), "watt_per_state");
- if (all_power_values_str == NULL)
- return;
-
- xbt_dynar_t all_power_values = xbt_str_split(all_power_values_str, ",");
- int pstate_nb = xbt_dynar_length(all_power_values);
-
- 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 - "
+ if (all_power_values_str == NULL)
+ return;
+
+ xbt_dynar_t all_power_values = xbt_str_split(all_power_values_str, ",");
+ int pstate_nb = xbt_dynar_length(all_power_values);
+
+ 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",
- host->name().c_str());
+ host->name().c_str());
- /* min_power corresponds to the idle power (cpu load = 0) */
- /* max_power is the power consumed at 100% cpu load */
+ /* min_power corresponds to the idle power (cpu load = 0) */
+ /* max_power is the power consumed at 100% cpu load */
power_range_watts_list.push_back(power_range(
atof(xbt_dynar_get_as(current_power_values, 0, char*)),
atof(xbt_dynar_get_as(current_power_values, 1, char*))
));
- }
- xbt_dynar_free(&all_power_values);
+
+ xbt_dynar_free(¤t_power_values);
+ }
+ xbt_dynar_free(&all_power_values);
}
}
