X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/50ddfe2f5b5035e0ed9556b334d6977ee81ff83a..6a7ea41191ea6c52ac29c005c52eecb4b1d867aa:/src/plugins/host_dvfs.cpp diff --git a/src/plugins/host_dvfs.cpp b/src/plugins/host_dvfs.cpp index 0a0e2da83b..faeb63c4eb 100644 --- a/src/plugins/host_dvfs.cpp +++ b/src/plugins/host_dvfs.cpp @@ -5,7 +5,10 @@ #include "simgrid/plugins/dvfs.h" #include "simgrid/plugins/load.h" +#include "simgrid/s4u/Engine.hpp" +#include "src/kernel/activity/ExecImpl.hpp" #include "src/plugins/vm/VirtualMachineImpl.hpp" +#include "src/smpi/plugins/ampi/ampi.hpp" #include #include @@ -20,13 +23,23 @@ static simgrid::config::Flag cfg_governor("plugin/dvfs/governor", "Which Governor should be used that adapts the CPU frequency?", "performance", std::map({ + {"adagio", "TODO: Doc"}, {"conservative", "TODO: Doc"}, {"ondemand", "TODO: Doc"}, {"performance", "TODO: Doc"}, {"powersave", "TODO: Doc"}, }), - [](std::string val){if (val != "performance") sg_host_dvfs_plugin_init();}); + [](std::string val) { if (val != "performance") sg_host_dvfs_plugin_init(); }); + +static simgrid::config::Flag cfg_min_pstate("plugin/dvfs/min-pstate", {"plugin/dvfs/min_pstate"}, + "Which pstate is the minimum (and hence fastest) pstate for this governor?", 0, + [](int index) {}); + +static const int max_pstate_not_limited = -1; +static simgrid::config::Flag cfg_max_pstate("plugin/dvfs/max-pstate", {"plugin/dvfs/max_pstate"}, + "Which pstate is the maximum (and hence slowest) pstate for this governor?", max_pstate_not_limited, + [](int index) {}); /** @addtogroup SURF_plugin_load @@ -61,30 +74,37 @@ namespace dvfs { */ class Governor { -protected: +private: simgrid::s4u::Host* const host_; double sampling_rate_; + int min_pstate; + int max_pstate; public: - explicit Governor(simgrid::s4u::Host* ptr) : host_(ptr) { init(); } + 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); + init(); + } virtual ~Governor() = default; - virtual std::string get_name() = 0; + virtual std::string get_name() const = 0; simgrid::s4u::Host* get_host() const { return host_; } 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; } } virtual void update() = 0; - double get_sampling_rate() { return sampling_rate_; } + double get_sampling_rate() const { return sampling_rate_; } }; /** @@ -100,9 +120,9 @@ public: class Performance : public Governor { public: explicit Performance(simgrid::s4u::Host* ptr) : Governor(ptr) {} - std::string get_name() override { return "Performance"; } + std::string get_name() const override { return "Performance"; } - void update() override { get_host()->set_pstate(0); } + void update() override { get_host()->set_pstate(min_pstate); } }; /** @@ -118,9 +138,9 @@ public: class Powersave : public Governor { public: explicit Powersave(simgrid::s4u::Host* ptr) : Governor(ptr) {} - std::string get_name() override { return "Powersave"; } + std::string get_name() const override { return "Powersave"; } - void update() override { get_host()->set_pstate(get_host()->get_pstate_count() - 1); } + void update() override { get_host()->set_pstate(max_pstate); } }; /** @@ -141,7 +161,7 @@ class OnDemand : public Governor { public: explicit OnDemand(simgrid::s4u::Host* ptr) : Governor(ptr) {} - std::string get_name() override { return "OnDemand"; } + std::string get_name() const override { return "OnDemand"; } void update() override { @@ -149,8 +169,8 @@ public: 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(0); /* Run at max. performance! */ - XBT_INFO("Load: %f > threshold: %f --> changed to pstate %i", load, freq_up_threshold_, 0); + 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); } else { /* The actual implementation uses a formula here: (See Kernel file cpufreq_ondemand.c:158) * @@ -159,7 +179,6 @@ public: * So they assume that frequency increases by 100 MHz. We will just use * lowest_pstate - load*pstatesCount() */ - int max_pstate = get_host()->get_pstate_count() - 1; // 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); @@ -168,6 +187,7 @@ public: XBT_DEBUG("Load: %f < threshold: %f --> changed to pstate %i", load, freq_up_threshold_, new_pstate); } } + }; /** @@ -188,7 +208,7 @@ class Conservative : public Governor { public: explicit Conservative(simgrid::s4u::Host* ptr) : Governor(ptr) {} - virtual std::string get_name() override { return "Conservative"; } + virtual std::string get_name() const override { return "Conservative"; } virtual void update() override { @@ -197,7 +217,7 @@ public: sg_host_load_reset(get_host()); // Only consider the period between two calls to this method! if (load > freq_up_threshold_) { - if (pstate != 0) { + if (pstate != 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); @@ -206,7 +226,6 @@ public: freq_up_threshold_, pstate); } } else if (load < freq_down_threshold_) { - int max_pstate = get_host()->get_pstate_count() - 1; if (pstate != 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); @@ -218,6 +237,101 @@ public: } }; +class Adagio : public Governor { +private: + int best_pstate = 0; + double start_time = 0; + double comp_counter = 0; + double comp_timer = 0; + + std::vector> rates; + + unsigned int task_id = 0; + bool iteration_running = false; /*< Are we currently between iteration_in and iteration_out calls? */ + +public: + explicit Adagio(simgrid::s4u::Host* ptr) + : Governor(ptr), rates(100, std::vector(host_->get_pstate_count(), 0.0)) + { + 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 + // changes, even those who don't currently run the actor 'proc_id'. + // -> Let's check if this signal call is for us! + if (get_host() == actor->get_host()) { + iteration_running = true; + } + }); + simgrid::smpi::plugin::ampi::on_iteration_out.connect([this](simgrid::s4u::ActorPtr actor) { + if (get_host() == actor->get_host()) { + iteration_running = false; + task_id = 0; + } + }); + simgrid::kernel::activity::ExecImpl::on_creation.connect([this](simgrid::kernel::activity::ExecImplPtr activity) { + if (activity->host_ == get_host()) + pre_task(); + }); + simgrid::kernel::activity::ExecImpl::on_completion.connect([this](simgrid::kernel::activity::ExecImplPtr activity) { + // For more than one host (not yet supported), we can access the host via + // simcalls_.front()->issuer->iface()->get_host() + if (activity->host_ == get_host() && iteration_running) { + comp_timer += activity->surf_action_->get_finish_time() - activity->surf_action_->get_start_time(); + } + }); + simgrid::s4u::Link::on_communicate.connect( + [this](kernel::resource::NetworkAction* action, s4u::Host* src, s4u::Host* dst) { + if ((get_host() == src || get_host() == dst) && iteration_running) { + post_task(); + } + }); + } + + virtual std::string get_name() const override { return "Adagio"; } + + void pre_task() + { + sg_host_load_reset(host_); + comp_counter = sg_host_get_computed_flops(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(host_->get_pstate_count(), 0.0)); + if (rates[task_id][best_pstate] == 0) + best_pstate = 0; + 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 target_time = (simgrid::s4u::Engine::get_clock() - start_time); + target_time = + target_time * + static_cast(99.0 / 100.0); // FIXME We account for t_copy arbitrarily with 1% -- this needs to be fixed + + 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()); + } + is_initialized = true; + } + + for (int pstate = 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; + break; + } + } + task_id++; + } + + virtual void update() override {} +}; } // namespace dvfs } // namespace plugin } // namespace simgrid @@ -256,6 +370,9 @@ static void on_host_added(simgrid::s4u::Host& host) } else if (dvfs_governor == "ondemand") { return std::unique_ptr( new simgrid::plugin::dvfs::OnDemand(daemon_proc->get_host())); + } else if (dvfs_governor == "adagio") { + return std::unique_ptr( + new simgrid::plugin::dvfs::Adagio(daemon_proc->get_host())); } else if (dvfs_governor == "performance") { return std::unique_ptr( new simgrid::plugin::dvfs::Performance(daemon_proc->get_host()));