X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/9104957deccc59e0e804215d5db498fabfd40d29..cf454dfcf7c27e86e15af1a45c58dbb7a76e43c8:/src/surf/cpu_interface.hpp diff --git a/src/surf/cpu_interface.hpp b/src/surf/cpu_interface.hpp index 1e77a39467..b71f146f37 100644 --- a/src/surf/cpu_interface.hpp +++ b/src/surf/cpu_interface.hpp @@ -1,4 +1,4 @@ -/* Copyright (c) 2004-2020. The SimGrid Team. All rights reserved. */ +/* Copyright (c) 2004-2021. The SimGrid Team. All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it * under the terms of the license (GNU LGPL) which comes with this package. */ @@ -21,13 +21,14 @@ namespace simgrid { namespace kernel { namespace resource { -/** @ingroup SURF_cpu_interface - * @brief SURF cpu model interface class - * @details A model is an object which handle the interactions between its Resources and its Actions - */ +class CpuAction; + +/********* + * Model * + *********/ class XBT_PUBLIC CpuModel : public Model { public: - explicit CpuModel(Model::UpdateAlgo algo) : Model(algo) {} + using Model::Model; /** * @brief Create a Cpu @@ -47,43 +48,62 @@ public: * Resource * ************/ -class CpuAction; +class XBT_PUBLIC Cpu : public Resource_T { + friend vm::VirtualMachineImpl; // Resets the VCPU -/** @ingroup SURF_cpu_interface -* @brief SURF cpu resource interface class -* @details A Cpu represent a cpu associated to a host -*/ -class XBT_PUBLIC Cpu : public Resource { + s4u::Host* piface_; int core_count_ = 1; - s4u::Host* host_; - int pstate_ = 0; /*< Current pstate (index in the speed_per_pstate_)*/ - const std::vector speed_per_pstate_; /*< List of supported CPU capacities (pstate related) */ + int pstate_ = 0; /*< Current pstate (index in the speed_per_pstate_)*/ + std::vector speed_per_pstate_; /*< List of supported CPU capacities (pstate related). Not 'const' because VCPU + get modified on migration */ public: /** * @brief Cpu constructor * - * @param model The CpuModel associated to this Cpu * @param host The host in which this Cpu should be plugged - * @param constraint The lmm constraint associated to this Cpu if it is part of a LMM component - * @param speedPerPstate Processor speed (in flop per second) for each pstate - * @param core The number of core of this Cpu + * @param speed_per_pstate Processor speed (in flop per second) for each pstate */ - Cpu(Model* model, s4u::Host* host, lmm::Constraint* constraint, const std::vector& speed_per_pstate, - int core); + Cpu(s4u::Host* host, const std::vector& speed_per_pstate); - /** - * @brief Cpu constructor + Cpu(const Cpu&) = delete; + Cpu& operator=(const Cpu&) = delete; + + /** @brief Public interface */ + s4u::Host* get_iface() { return piface_; } + + Cpu* set_core_count(int core_count); + virtual int get_core_count(); + + void seal(); + + /** @brief Get a forecast of the speed (in flops/s) if the load were as provided. * - * @param model The CpuModel associated to this Cpu - * @param host The host in which this Cpu should be plugged - * @param speedPerPstate Processor speed (in flop per second) for each pstate - * @param core The number of core of this Cpu + * The provided load should encompasses both the application's activities and the external load that come from a + * trace. + * + * Use a load of 1.0 to compute the amount of flops that the Cpu would deliver with one CPU-bound task. + * If you use a load of 0, this function will return 0: when nobody is using the Cpu, it delivers nothing. + * + * If you want to know the amount of flops currently delivered, use load = get_load()*get_speed_ratio() */ - Cpu(Model* model, s4u::Host* host, const std::vector& speed_per_pstate, int core); + virtual double get_speed(double load) const { return load * speed_.peak; } - Cpu(const Cpu&) = delete; - Cpu& operator=(const Cpu&) = delete; + /** @brief Get the available speed ratio, in [0:1]. This accounts for external load (see @ref set_speed_profile()). */ + virtual double get_speed_ratio() { return speed_.scale; } + + /** @brief Get the peak processor speed (in flops/s), at the specified pstate */ + virtual double get_pstate_peak_speed(int pstate_index) const; + + virtual int get_pstate_count() const { return speed_per_pstate_.size(); } + + virtual void set_pstate(int pstate_index); + virtual int get_pstate() const { return pstate_; } + + /*< @brief Setup the trace file with availability events (peak speed changes due to external load). + * Trace must contain relative values (ratio between 0 and 1) + */ + virtual void set_speed_profile(profile::Profile* profile); /** * @brief Execute some quantity of computation @@ -110,46 +130,17 @@ public: */ virtual CpuAction* sleep(double duration) = 0; - /** @brief Get the amount of cores */ - virtual int get_core_count(); - - /** @brief Get a forecast of the speed (in flops/s) if the load were as provided. - * - * The provided load should encompasses both the application's activities and the external load that come from a trace. - * - * Use a load of 1.0 to compute the amount of flops that the Cpu would deliver with one CPU-bound task. - * If you use a load of 0, this function will return 0: when nobody is using the Cpu, it delivers nothing. - * - * If you want to know the amount of flops currently delivered, use load = get_load()*get_speed_ratio() - */ - virtual double get_speed(double load) const; - protected: /** @brief Take speed changes (either load or max) into account */ virtual void on_speed_change(); -public: - /** @brief Get the available speed ratio, between 0 and 1. + /** Reset most characteristics of this CPU to the one of that CPU. * - * This accounts for external load (see @ref set_speed_trace()). - */ - virtual double get_speed_ratio(); - - /** @brief Get the peak processor speed (in flops/s), at the specified pstate */ - virtual double get_pstate_peak_speed(int pstate_index) const; - - virtual int get_pstate_count() const; - virtual void set_pstate(int pstate_index); - virtual int get_pstate() const; + * Used to reset a VCPU when its VM migrates to another host, so it only resets the fields that should be in this + *case. + **/ + virtual void reset_vcpu(Cpu* that); - s4u::Host* get_host() { return host_; } - - /*< @brief Setup the trace file with availability events (peak speed changes due to external load). - * Trace must contain relative values (ratio between 0 and 1) - */ - virtual void set_speed_profile(profile::Profile* profile); - -protected: Metric speed_ = {1.0, 0, nullptr}; }; @@ -167,8 +158,7 @@ public: */ static xbt::signal on_state_change; - CpuAction(Model* model, double cost, bool failed) : Action(model, cost, failed) {} - CpuAction(Model* model, double cost, bool failed, lmm::Variable* var) : Action(model, cost, failed, var) {} + using Action::Action; void set_state(Action::State state) override;