* under the terms of the license (GNU LGPL) which comes with this package. */
#include "simgrid/plugins/load.h"
+#include "src/include/surf/surf.hpp"
+#include "src/kernel/activity/ExecImpl.hpp"
#include "src/plugins/vm/VirtualMachineImpl.hpp"
+#include <simgrid/s4u.hpp>
+
+SIMGRID_REGISTER_PLUGIN(host_load, "Cpu load", &sg_host_load_plugin_init)
/** @addtogroup plugin_load
namespace simgrid {
namespace plugin {
+static const double activity_uninitialized_remaining_cost = -1;
+
class HostLoad {
public:
static simgrid::xbt::Extension<simgrid::s4u::Host, HostLoad> EXTENSION_ID;
: host_(ptr)
, last_updated_(surf_get_clock())
, last_reset_(surf_get_clock())
- , current_speed_(host_->getSpeed())
+ , current_speed_(host_->get_speed())
, current_flops_(host_->pimpl_cpu->get_constraint()->get_usage())
, theor_max_flops_(0)
- , was_prev_idle_(current_flops_ == 0)
{
}
~HostLoad() = default;
+ HostLoad() = delete;
+ explicit HostLoad(simgrid::s4u::Host& ptr) = delete;
+ explicit HostLoad(simgrid::s4u::Host&& ptr) = delete;
double get_current_load();
- double get_average_load() { return (theor_max_flops_ == 0) ? 0 : computed_flops_ / theor_max_flops_; };
- double get_computed_flops() { return computed_flops_; }
- double get_idle_time() { return idle_time_; } /** Return idle time since last reset */
+ double get_average_load() { update(); return (theor_max_flops_ == 0) ? 0 : computed_flops_ / theor_max_flops_; };
+ double get_computed_flops() { update(); return computed_flops_; }
+ double get_idle_time() { update(); return idle_time_; } /** Return idle time since last reset */
+ double get_total_idle_time() { update(); return total_idle_time_; } /** Return idle time over the whole simulation */
void update();
+ void add_activity(simgrid::kernel::activity::ExecImplPtr activity);
void reset();
private:
simgrid::s4u::Host* host_ = nullptr;
+ /* Stores all currently ongoing activities (computations) on this machine */
+ std::map<simgrid::kernel::activity::ExecImplPtr, /* cost still remaining*/double> current_activities;
double last_updated_ = 0;
double last_reset_ = 0;
+ /**
+ * current_speed each core is running at; we need to store this as the speed
+ * will already have changed once we get notified
+ */
double current_speed_ = 0;
+ /**
+ * How many flops are currently used by all the processes running on this
+ * host?
+ */
double current_flops_ = 0;
double computed_flops_ = 0;
double idle_time_ = 0;
+ double total_idle_time_ = 0; /* This gets never reset */
double theor_max_flops_ = 0;
- bool was_prev_idle_ = true; /* A host is idle at the beginning */
};
simgrid::xbt::Extension<simgrid::s4u::Host, HostLoad> HostLoad::EXTENSION_ID;
+void HostLoad::add_activity(simgrid::kernel::activity::ExecImplPtr activity)
+{
+ current_activities.insert({activity, activity_uninitialized_remaining_cost});
+}
+
void HostLoad::update()
{
double now = surf_get_clock();
- /* Current flop per second computed by the cpu; current_flops = k * pstate_speed_in_flops, k \in {0, 1, ..., cores}
- * number of active cores */
+ /* Current flop per second computed by the cpu; current_flops = k * pstate_speed_in_flops, k @in {0, 1, ..., cores-1}
+ * designates number of active cores; will be 0 if CPU is currently idle */
current_flops_ = host_->pimpl_cpu->get_constraint()->get_usage();
/* flops == pstate_speed * cores_being_currently_used */
computed_flops_ += (now - last_updated_) * current_flops_;
- if (was_prev_idle_) {
+ if (current_flops_ == 0) {
idle_time_ += (now - last_updated_);
+ total_idle_time_ += (now - last_updated_);
+ XBT_DEBUG("[%s]: Currently idle -> Added %f seconds to idle time (totaling %fs)", host_->get_cname(), (now - last_updated_), idle_time_);
}
theor_max_flops_ += current_speed_ * host_->get_core_count() * (now - last_updated_);
- current_speed_ = host_->getSpeed();
+ current_speed_ = host_->get_speed();
last_updated_ = now;
- was_prev_idle_ = (current_flops_ == 0);
}
/**
{
// We don't need to call update() here because it is called every time an action terminates or starts
// FIXME: Can this happen at the same time? stop -> call to getCurrentLoad, load = 0 -> next action starts?
- return current_flops_ / static_cast<double>(host_->getSpeed() * host_->get_core_count());
+ return current_flops_ / static_cast<double>(host_->get_speed() * host_->get_core_count());
}
/*
computed_flops_ = 0;
theor_max_flops_ = 0;
current_flops_ = host_->pimpl_cpu->get_constraint()->get_usage();
- current_speed_ = host_->getSpeed();
- was_prev_idle_ = (current_flops_ == 0);
+ current_speed_ = host_->get_speed();
}
} // namespace plugin
} // namespace simgrid
}
/* This callback is called when an action (computation, idle, ...) terminates */
-static void on_action_state_change(simgrid::surf::CpuAction* action)
+static void on_action_state_change(simgrid::surf::CpuAction* action, simgrid::kernel::resource::Action::State /*previous*/)
{
for (simgrid::surf::Cpu* const& cpu : action->cpus()) {
simgrid::s4u::Host* host = cpu->get_host();
/* **************************** Public interface *************************** */
-/** \ingroup plugin_load
- * \brief Initializes the HostLoad plugin
- * \details The HostLoad plugin provides an API to get the current load of each host.
+/** @ingroup plugin_load
+ * @brief Initializes the HostLoad plugin
+ * @details The HostLoad plugin provides an API to get the current load of each host.
*/
void sg_host_load_plugin_init()
{
HostLoad::EXTENSION_ID = simgrid::s4u::Host::extension_create<HostLoad>();
+ if (simgrid::s4u::Engine::is_initialized()) { // If not yet initialized, this would create a new instance
+ // which would cause seg faults...
+ simgrid::s4u::Engine* e = simgrid::s4u::Engine::get_instance();
+ for (auto& host : e->get_all_hosts()) {
+ host->extension_set(new HostLoad(host));
+ }
+ }
+
/* When attaching a callback into a signal, you can use a lambda as follows, or a regular function as done below */
simgrid::s4u::Host::on_creation.connect([](simgrid::s4u::Host& host) {
return host->extension<HostLoad>()->get_idle_time();
}
+double sg_host_get_total_idle_time(sg_host_t host)
+{
+ xbt_assert(HostLoad::EXTENSION_ID.valid(),
+ "The Load plugin is not active. Please call sg_host_load_plugin_init() during initialization.");
+
+ return host->extension<HostLoad>()->get_total_idle_time();
+}
+
double sg_host_get_computed_flops(sg_host_t host)
{
xbt_assert(HostLoad::EXTENSION_ID.valid(),
