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 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().
-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().
+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().
*/
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_energy, surf,
namespace simgrid {
namespace energy {
-simgrid::xbt::Extension<simgrid::Host, HostEnergy> HostEnergy::EXTENSION_ID;
+simgrid::xbt::Extension<simgrid::s4u::Host, HostEnergy> HostEnergy::EXTENSION_ID;
/* Computes the consumption so far. Called lazily on need. */
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->isOff())
- 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::Host *ptr) :
+HostEnergy::HostEnergy(simgrid::s4u::Host *ptr) :
host(ptr), last_updated(surf_get_clock())
{
initWattsRangeList();
- if (host->getProperties() != NULL) {
- char* off_power_str = (char*)xbt_dict_get_or_null(host->getProperties(), "watt_off");
+ if (host->properties() != NULL) {
+ char* off_power_str = (char*)xbt_dict_get_or_null(
+ host->properties(), "watt_off");
if (off_power_str != NULL)
watts_off = atof(off_power_str);
else
HostEnergy::~HostEnergy()
{
- // Ignore virtual machines
- if (dynamic_cast<simgrid::surf::VirtualMachine*>(host->extension<simgrid::surf::Host>()))
- return;
- this->update();
- XBT_INFO("Total energy of host %s: %f Joules",
- host->getName().c_str(), this->getConsumedEnergy());
}
double HostEnergy::getWattMinAt(int pstate)
{
xbt_assert(!power_range_watts_list.empty(),
- "No power range properties specified for host %s", host->getName().c_str());
+ "No power range properties specified for host %s", host->name().c_str());
return power_range_watts_list[pstate].first;
}
double HostEnergy::getWattMaxAt(int pstate)
{
xbt_assert(!power_range_watts_list.empty(),
- "No power range properties specified for host %s", host->getName().c_str());
+ "No power range properties specified for host %s", host->name().c_str());
return power_range_watts_list[pstate].second;
}
/** @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(),
- "No power range properties specified for host %s", host->getName().c_str());
+ 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) */
/* max_power is the power consumed at 100% cpu load */
- auto range = power_range_watts_list.at(host->getPState());
+ 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;
+ 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())
- this->update();
- return total_energy;
+ 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;
}
void HostEnergy::initWattsRangeList()
{
- if (host->getProperties() == NULL)
- return;
- char* all_power_values_str =
- (char*)xbt_dict_get_or_null(host->getProperties(), "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 (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 - "
"could not retrieve min and max power values for host %s",
- host->getName().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);
}
-double surf_host_get_wattmin_at(sg_host_t host, int pstate)
-{
- xbt_assert(HostEnergy::EXTENSION_ID.valid(),
- "The Energy plugin is not active. "
- "Please call sg_energy_plugin_init() during initialization.");
- return host->extension<HostEnergy>()->getWattMinAt(pstate);
}
-double surf_host_get_wattmax_at(sg_host_t host, int pstate)
-{
- xbt_assert(HostEnergy::EXTENSION_ID.valid(),
- "The Energy plugin is not active. "
- "Please call sg_energy_plugin_init() during initialization.");
- return host->extension<HostEnergy>()->getWattMaxAt(pstate);
}
-double surf_host_get_consumed_energy(sg_host_t host)
-{
- xbt_assert(HostEnergy::EXTENSION_ID.valid(),
- "The Energy plugin is not active. "
- "Please call sg_energy_plugin_init() during initialization.");
- return host->extension<HostEnergy>()->getConsumedEnergy();
+/* **************************** events callback *************************** */
+static void onCreation(simgrid::s4u::Host& host) {
+ simgrid::surf::Host* surf_host = host.extension<simgrid::surf::Host>();
+ if (dynamic_cast<simgrid::surf::VirtualMachine*>(surf_host)) // Ignore virtual machines
+ return;
+ host.extension_set(new HostEnergy(&host));
+}
+
+static void onActionStateChange(simgrid::surf::CpuAction *action, e_surf_action_state_t previous) {
+ const char *name = getActionCpu(action)->getName();
+ simgrid::surf::Host *host = sg_host_by_name(name)->extension<simgrid::surf::Host>();
+ simgrid::surf::VirtualMachine *vm = dynamic_cast<simgrid::surf::VirtualMachine*>(host);
+ if (vm) // If it's a VM, take the corresponding PM
+ host = vm->getPm()->extension<simgrid::surf::Host>();
+
+ HostEnergy *host_energy = host->p_host->extension<HostEnergy>();
+
+ if(host_energy->last_updated < surf_get_clock())
+ host_energy->update();
}
+static void onHostStateChange(simgrid::s4u::Host &host) {
+ simgrid::surf::Host* surf_host = host.extension<simgrid::surf::Host>();
+ if (dynamic_cast<simgrid::surf::VirtualMachine*>(surf_host)) // Ignore virtual machines
+ return;
+
+ HostEnergy *host_energy = host.extension<HostEnergy>();
+
+ if(host_energy->last_updated < surf_get_clock())
+ host_energy->update();
}
+
+static void onHostDestruction(simgrid::s4u::Host& host) {
+ // Ignore virtual machines
+ simgrid::surf::Host* surf_host = host.extension<simgrid::surf::Host>();
+ if (dynamic_cast<simgrid::surf::VirtualMachine*>(surf_host))
+ return;
+ HostEnergy *host_energy = host.extension<HostEnergy>();
+ host_energy->update();
+ XBT_INFO("Total energy of host %s: %f Joules",
+ host.name().c_str(), host_energy->getConsumedEnergy());
}
/* **************************** Public interface *************************** */
-
/** \ingroup SURF_plugin_energy
* \brief Enable energy plugin
* \details Enable energy plugin to get joules consumption of each cpu. You should call this function before #MSG_init().
if (HostEnergy::EXTENSION_ID.valid())
return;
- HostEnergy::EXTENSION_ID = simgrid::Host::extension_create<HostEnergy>();
-
- /* The following attaches an anonymous function to the Host::onCreation signal */
- /* Search for "C++ lambda" for more information on the syntax used here */
- simgrid::surf::Host::onCreation.connect([](simgrid::surf::Host *host) {
- if (dynamic_cast<simgrid::surf::VirtualMachine*>(host)) // Ignore virtual machines
- return;
- host->p_host->extension_set(new HostEnergy(host->p_host));
- });
-
- simgrid::surf::CpuAction::onStateChange.connect([](simgrid::surf::CpuAction *action,
- e_surf_action_state_t old,
- e_surf_action_state_t cur) {
- const char *name = getActionCpu(action)->getName();
- simgrid::surf::Host *host = sg_host_by_name(name)->extension<simgrid::surf::Host>();
- simgrid::surf::VirtualMachine *vm = dynamic_cast<simgrid::surf::VirtualMachine*>(host);
- if (vm) // If it's a VM, take the corresponding PM
- host = vm->getPm()->extension<simgrid::surf::Host>();
-
- HostEnergy *host_energy = host->p_host->extension<HostEnergy>();
-
- if(host_energy->last_updated < surf_get_clock())
- host_energy->update();
-
- });
+ HostEnergy::EXTENSION_ID = simgrid::s4u::Host::extension_create<HostEnergy>();
- simgrid::surf::Host::onStateChange.connect([] (simgrid::surf::Host *host) {
- if (dynamic_cast<simgrid::surf::VirtualMachine*>(host)) // Ignore virtual machines
- return;
-
- HostEnergy *host_energy = host->p_host->extension<HostEnergy>();
-
- if(host_energy->last_updated < surf_get_clock())
- host_energy->update();
- });
+ simgrid::s4u::Host::onCreation.connect(&onCreation);
+ simgrid::s4u::Host::onStateChange.connect(&onHostStateChange);
+ simgrid::s4u::Host::onDestruction.connect(&onHostDestruction);
+ simgrid::surf::CpuAction::onStateChange.connect(&onActionStateChange);
}
/** @brief Returns the total energy consumed by the host so far (in Joules)
* See also @ref SURF_plugin_energy.
*/
double sg_host_get_consumed_energy(sg_host_t host) {
- return simgrid::energy::surf_host_get_consumed_energy(host);
+ xbt_assert(HostEnergy::EXTENSION_ID.valid(),
+ "The Energy plugin is not active. "
+ "Please call sg_energy_plugin_init() during initialization.");
+ return host->extension<HostEnergy>()->getConsumedEnergy();
}
/** @brief Get the amount of watt dissipated at the given pstate when the host is idling */
double sg_host_get_wattmin_at(sg_host_t host, int pstate) {
- return simgrid::simix::kernel(std::bind(
- simgrid::energy::surf_host_get_wattmin_at, host, pstate
- ));
+ xbt_assert(HostEnergy::EXTENSION_ID.valid(),
+ "The Energy plugin is not active. "
+ "Please call sg_energy_plugin_init() during initialization.");
+ return host->extension<HostEnergy>()->getWattMinAt(pstate);
}
/** @brief Returns the amount of watt dissipated at the given pstate when the host burns CPU at 100% */
double sg_host_get_wattmax_at(sg_host_t host, int pstate) {
- return simgrid::simix::kernel(std::bind(
- simgrid::energy::surf_host_get_wattmax_at, host, pstate
- ));
+ xbt_assert(HostEnergy::EXTENSION_ID.valid(),
+ "The Energy plugin is not active. "
+ "Please call sg_energy_plugin_init() during initialization.");
+ return host->extension<HostEnergy>()->getWattMaxAt(pstate);
}
