X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/d23d862cfe45045b5a90879b7e0bc44a25bc5291..6a7ea41191ea6c52ac29c005c52eecb4b1d867aa:/src/plugins/host_dvfs.cpp diff --git a/src/plugins/host_dvfs.cpp b/src/plugins/host_dvfs.cpp index b99df53b9b..faeb63c4eb 100644 --- a/src/plugins/host_dvfs.cpp +++ b/src/plugins/host_dvfs.cpp @@ -5,11 +5,42 @@ #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 +SIMGRID_REGISTER_PLUGIN(host_dvfs, "Dvfs support", &sg_host_dvfs_plugin_init) + +static simgrid::config::Flag cfg_sampling_rate("plugin/dvfs/sampling-rate", {"plugin/dvfs/sampling_rate"}, + "How often should the dvfs plugin check whether the frequency needs to be changed?", 0.1, + [](double val){if (val != 0.1) sg_host_dvfs_plugin_init();}); + +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(); }); + +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 This plugin makes it very simple for users to obtain the current load for each host. @@ -18,41 +49,62 @@ XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_plugin_dvfs, surf, "Logging specific to the SURF HostDvfs plugin"); -static const char* property_sampling_rate = "plugin/dvfs/sampling_rate"; -static const char* property_governor = "plugin/dvfs/governor"; - namespace simgrid { namespace plugin { namespace dvfs { + +/** + * Add this to your host tag: + * - \ + * + * Valid values as of now are: performance, powersave, ondemand, conservative + * It doesn't matter if you use uppercase or lowercase. + * + * For the sampling rate, use this: + * + * - \ + * + * This will run the update() method of the specified governor every 2 seconds + * on that host. + * + * These properties can also be used within the \ tag to configure + * these values globally. Using them within the \ will overwrite this + * global configuration + */ class Governor { private: simgrid::s4u::Host* const host_; double sampling_rate_; - -protected: - simgrid::s4u::Host* get_host() const { return host_; } + 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(property_sampling_rate); - double global_sampling_rate_config = simgrid::config::get_value(property_sampling_rate); + const char* local_sampling_rate_config = host_->get_property(cfg_sampling_rate.get_name()); 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_; } }; /** @@ -68,9 +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); } }; /** @@ -86,9 +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); } }; /** @@ -109,7 +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 { @@ -117,8 +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) * @@ -127,7 +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); @@ -136,6 +187,7 @@ public: XBT_DEBUG("Load: %f < threshold: %f --> changed to pstate %i", load, freq_up_threshold_, new_pstate); } } + }; /** @@ -156,7 +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 { @@ -165,7 +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); @@ -174,7 +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); @@ -186,40 +237,105 @@ public: } }; -/** - * Add this to your host tag: - * - \ - * - * Valid values as of now are: performance, powersave, ondemand, conservative - * It doesn't matter if you use uppercase or lowercase. - * - * For the sampling rate, use this: - * - * - \ - * - * This will run the update() method of the specified governor every 2 seconds - * on that host. - * - * These properties can also be used within the \ tag to configure - * these values globally. Using them within the \ will overwrite this - * global configuration - */ -class HostDvfs { +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: - static simgrid::xbt::Extension EXTENSION_ID; + 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(); + } + }); + } - explicit HostDvfs(simgrid::s4u::Host*){}; - ~HostDvfs() = default; -}; + 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; + } -simgrid::xbt::Extension HostDvfs::EXTENSION_ID; + 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 -using simgrid::plugin::dvfs::HostDvfs; - /* **************************** events callback *************************** */ static void on_host_added(simgrid::s4u::Host& host) { @@ -238,12 +354,12 @@ static void on_host_added(simgrid::s4u::Host& host) XBT_DEBUG("DVFS process on %s is a daemon: %d", daemon_proc->get_host()->get_cname(), daemon_proc->is_daemon()); std::string dvfs_governor; - const char* host_conf = daemon_proc->get_host()->get_property(property_governor); + const char* host_conf = daemon_proc->get_host()->get_property("plugin/dvfs/governor"); if (host_conf != nullptr) { - dvfs_governor = std::string(daemon_proc->get_host()->get_property(property_governor)); + dvfs_governor = std::string(host_conf); boost::algorithm::to_lower(dvfs_governor); } else { - dvfs_governor = simgrid::config::get_value(property_governor); + dvfs_governor = cfg_governor; boost::algorithm::to_lower(dvfs_governor); } @@ -254,6 +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())); @@ -288,22 +407,18 @@ static void on_host_added(simgrid::s4u::Host& host) /* **************************** Public interface *************************** */ -/** \ingroup SURF_plugin_load - * \brief Initializes the HostDvfs plugin - * \details The HostDvfs plugin provides an API to get the current load of each host. +/** @ingroup SURF_plugin_load + * @brief Initializes the HostDvfs plugin + * @details The HostDvfs plugin provides an API to get the current load of each host. */ void sg_host_dvfs_plugin_init() { - if (HostDvfs::EXTENSION_ID.valid()) + static bool inited = false; + if (inited) return; - - HostDvfs::EXTENSION_ID = simgrid::s4u::Host::extension_create(); + inited = true; sg_host_load_plugin_init(); simgrid::s4u::Host::on_creation.connect(&on_host_added); - simgrid::config::declare_flag( - property_sampling_rate, "How often should the dvfs plugin check whether the frequency needs to be changed?", 0.1); - simgrid::config::declare_flag( - property_governor, "Which Governor should be used that adapts the CPU frequency?", "performance"); }