private:
simgrid::s4u::Host* const host_;
double sampling_rate_;
- int min_pstate;
- int max_pstate;
+ int min_pstate; //< Never use a pstate less than this one
+ int max_pstate; //< Never use a pstate larger than this one
public:
-
- explicit Governor(simgrid::s4u::Host* ptr) : host_(ptr), min_pstate(cfg_min_pstate),
- max_pstate(cfg_max_pstate == max_pstate_not_limited ? host_->get_pstate_count() - 1 : cfg_max_pstate) {
- xbt_assert(max_pstate <= host_->get_pstate_count() - 1);
- xbt_assert(min_pstate <= max_pstate);
- xbt_assert(0 <= min_pstate);
+ explicit Governor(simgrid::s4u::Host* ptr)
+ : host_(ptr)
+ , min_pstate(cfg_min_pstate)
+ , max_pstate(cfg_max_pstate == max_pstate_not_limited ? host_->get_pstate_count() - 1 : cfg_max_pstate)
+ {
init();
}
virtual ~Governor() = default;
virtual std::string get_name() const = 0;
simgrid::s4u::Host* get_host() const { return host_; }
+ int get_min_pstate() const { return min_pstate; }
+ int get_max_pstate() const { return max_pstate; }
void init()
{
const char* local_sampling_rate_config = host_->get_property(cfg_sampling_rate.get_name());
- double global_sampling_rate_config = cfg_sampling_rate;
if (local_sampling_rate_config != nullptr) {
sampling_rate_ = std::stod(local_sampling_rate_config);
} else {
- sampling_rate_ = global_sampling_rate_config;
+ sampling_rate_ = cfg_sampling_rate;
+ }
+ const char* local_min_pstate_config = host_->get_property(cfg_min_pstate.get_name());
+ if (local_min_pstate_config != nullptr) {
+ min_pstate = std::stoi(local_min_pstate_config);
}
+
+ const char* local_max_pstate_config = host_->get_property(cfg_max_pstate.get_name());
+ if (local_max_pstate_config != nullptr) {
+ max_pstate = std::stod(local_max_pstate_config);
+ }
+ xbt_assert(max_pstate <= host_->get_pstate_count() - 1, "Value for max_pstate too large!");
+ xbt_assert(min_pstate <= max_pstate, "min_pstate is larger than max_pstate!");
+ xbt_assert(0 <= min_pstate, "min_pstate is negative!");
}
virtual void update() = 0;
explicit Performance(simgrid::s4u::Host* ptr) : Governor(ptr) {}
std::string get_name() const override { return "Performance"; }
- void update() override { get_host()->set_pstate(min_pstate); }
+ void update() override { get_host()->set_pstate(get_min_pstate()); }
};
/**
explicit Powersave(simgrid::s4u::Host* ptr) : Governor(ptr) {}
std::string get_name() const override { return "Powersave"; }
- void update() override { get_host()->set_pstate(max_pstate); }
+ void update() override { get_host()->set_pstate(get_max_pstate()); }
};
/**
sg_host_load_reset(get_host()); // Only consider the period between two calls to this method!
if (load > freq_up_threshold_) {
- get_host()->set_pstate(min_pstate); /* Run at max. performance! */
- XBT_INFO("Load: %f > threshold: %f --> changed to pstate %i", load, freq_up_threshold_, min_pstate);
+ get_host()->set_pstate(get_min_pstate()); /* Run at max. performance! */
+ XBT_INFO("Load: %f > threshold: %f --> changed to pstate %i", load, freq_up_threshold_, get_min_pstate());
} else {
/* The actual implementation uses a formula here: (See Kernel file cpufreq_ondemand.c:158)
*
*/
// Load is now < freq_up_threshold; exclude pstate 0 (the fastest)
// because pstate 0 can only be selected if load > freq_up_threshold_
- int new_pstate = max_pstate - load * (max_pstate + 1);
+ int new_pstate = get_max_pstate() - load * (get_max_pstate() + 1);
+ if (new_pstate < get_min_pstate())
+ new_pstate = get_min_pstate();
get_host()->set_pstate(new_pstate);
XBT_DEBUG("Load: %f < threshold: %f --> changed to pstate %i", load, freq_up_threshold_, new_pstate);
}
}
-
};
/**
sg_host_load_reset(get_host()); // Only consider the period between two calls to this method!
if (load > freq_up_threshold_) {
- if (pstate != min_pstate) {
+ if (pstate != get_min_pstate()) {
get_host()->set_pstate(pstate - 1);
XBT_INFO("Load: %f > threshold: %f -> increasing performance to pstate %d", load, freq_up_threshold_,
pstate - 1);
freq_up_threshold_, pstate);
}
} else if (load < freq_down_threshold_) {
- if (pstate != max_pstate) { // Are we in the slowest pstate already?
+ if (pstate != get_max_pstate()) { // Are we in the slowest pstate already?
get_host()->set_pstate(pstate + 1);
XBT_INFO("Load: %f < threshold: %f -> slowing down to pstate %d", load, freq_down_threshold_, pstate + 1);
} else {
public:
explicit Adagio(simgrid::s4u::Host* ptr)
- : Governor(ptr), rates(100, std::vector<double>(host_->get_pstate_count(), 0.0))
+ : Governor(ptr), rates(100, std::vector<double>(ptr->get_pstate_count(), 0.0))
{
+#if HAVE_SMPI
simgrid::smpi::plugin::ampi::on_iteration_in.connect([this](simgrid::s4u::ActorPtr actor) {
// Every instance of this class subscribes to this event, so one per host
// This means that for any actor, all 'hosts' are normally notified of these
task_id = 0;
}
});
+#endif
simgrid::kernel::activity::ExecImpl::on_creation.connect([this](simgrid::kernel::activity::ExecImplPtr activity) {
if (activity->host_ == get_host())
pre_task();
void pre_task()
{
- sg_host_load_reset(host_);
- comp_counter = sg_host_get_computed_flops(host_); // Should be 0 because of the reset
+ sg_host_load_reset(get_host());
+ comp_counter = sg_host_get_computed_flops(get_host()); // Should be 0 because of the reset
comp_timer = 0;
start_time = simgrid::s4u::Engine::get_clock();
if (rates.size() <= task_id)
- rates.resize(task_id + 5, std::vector<double>(host_->get_pstate_count(), 0.0));
+ rates.resize(task_id + 5, std::vector<double>(get_host()->get_pstate_count(), 0.0));
if (rates[task_id][best_pstate] == 0)
best_pstate = 0;
- host_->set_pstate(best_pstate); // Load our schedule
+ get_host()->set_pstate(best_pstate); // Load our schedule
XBT_DEBUG("Set pstate to %i", best_pstate);
}
void post_task()
{
- double computed_flops = sg_host_get_computed_flops(host_) - comp_counter;
+ double computed_flops = sg_host_get_computed_flops(get_host()) - comp_counter;
double target_time = (simgrid::s4u::Engine::get_clock() - start_time);
target_time =
target_time *
bool is_initialized = rates[task_id][best_pstate] != 0;
rates[task_id][best_pstate] = computed_flops / comp_timer;
if (not is_initialized) {
- for (int i = 1; i < host_->get_pstate_count(); i++) {
- rates[task_id][i] = rates[task_id][0] * (host_->get_pstate_speed(i) / host_->get_speed());
+ for (int i = 1; i < get_host()->get_pstate_count(); i++) {
+ rates[task_id][i] = rates[task_id][0] * (get_host()->get_pstate_speed(i) / get_host()->get_speed());
}
- is_initialized = true;
}
- for (int pstate = host_->get_pstate_count() - 1; pstate >= 0; pstate--) {
+ for (int pstate = get_host()->get_pstate_count() - 1; pstate >= 0; pstate--) {
if (computed_flops / rates[task_id][pstate] <= target_time) {
// We just found the pstate we want to use!
best_pstate = pstate;
