power_model.cc revision 11527:9007a9729815
1/* 2 * Copyright (c) 2016 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions are 16 * met: redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer; 18 * redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution; 21 * neither the name of the copyright holders nor the names of its 22 * contributors may be used to endorse or promote products derived from 23 * this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Authors: David Guillen Fandos 38 */ 39 40#include "sim/power/power_model.hh" 41 42#include "base/statistics.hh" 43#include "params/PowerModel.hh" 44#include "params/PowerModelState.hh" 45#include "sim/sim_object.hh" 46#include "sim/sub_system.hh" 47 48PowerModelState::PowerModelState(const Params *p) 49 : SimObject(p), _temp(0), clocked_object(NULL) 50{ 51} 52 53PowerModel::PowerModel(const Params *p) 54 : SimObject(p), states_pm(p->pm), subsystem(p->subsystem), 55 clocked_object(NULL) 56{ 57 panic_if(subsystem == NULL, 58 "Subsystem is NULL! This is not acceptable for a PowerModel!\n"); 59 subsystem->registerPowerProducer(this); 60} 61 62void 63PowerModel::setClockedObject(ClockedObject * clkobj) 64{ 65 this->clocked_object = clkobj; 66 67 for (auto & pms: states_pm) 68 pms->setClockedObject(clkobj); 69} 70 71void 72PowerModel::thermalUpdateCallback(const double & temp) 73{ 74 for (auto & pms: states_pm) 75 pms->setTemperature(temp); 76} 77 78void 79PowerModel::regProbePoints() 80{ 81 thermalListener.reset(new ThermalProbeListener ( 82 *this, this->subsystem->getProbeManager(), "thermalUpdate" 83 )); 84} 85 86PowerModel* 87PowerModelParams::create() 88{ 89 return new PowerModel(this); 90} 91 92double 93PowerModel::getDynamicPower() const 94{ 95 assert(clocked_object); 96 97 std::vector<double> w = clocked_object->pwrStateWeights(); 98 99 // Same number of states (excluding UNDEFINED) 100 assert(w.size() - 1 == states_pm.size()); 101 102 // Make sure we have no UNDEFINED state 103 warn_if(w[Enums::PwrState::UNDEFINED] > 0, 104 "SimObject in UNDEFINED power state! Power figures might be wrong!\n"); 105 106 double power = 0; 107 for (unsigned i = 0; i < states_pm.size(); i++) 108 if (w[i + 1] > 0.0f) 109 power += states_pm[i]->getDynamicPower() * w[i + 1]; 110 111 return power; 112} 113 114double 115PowerModel::getStaticPower() const 116{ 117 assert(clocked_object); 118 119 std::vector<double> w = clocked_object->pwrStateWeights(); 120 121 // Same number of states (excluding UNDEFINED) 122 assert(w.size() - 1 == states_pm.size()); 123 124 // Make sure we have no UNDEFINED state 125 if (w[0] > 0) 126 warn("SimObject in UNDEFINED power state! " 127 "Power figures might be wrong!\n"); 128 129 // We have N+1 states, being state #0 the default 'UNDEFINED' state 130 double power = 0; 131 for (unsigned i = 0; i < states_pm.size(); i++) 132 // Don't evaluate power if the object hasn't been in that state 133 // This fixes issues with NaNs and similar. 134 if (w[i + 1] > 0.0f) 135 power += states_pm[i]->getStaticPower() * w[i + 1]; 136 137 return power; 138} 139