mathexpr_powermodel.hh revision 11800
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#ifndef __SIM_MATHEXPR_POWERMODEL_PM_HH__ 41#define __SIM_MATHEXPR_POWERMODEL_PM_HH__ 42 43#include <unordered_map> 44 45#include "params/MathExprPowerModel.hh" 46#include "sim/mathexpr.hh" 47#include "sim/power/power_model.hh" 48 49namespace Stats { 50 class Info; 51} 52 53/** 54 * A Equation power model. The power is represented as a combination 55 * of some stats and automatic variables (like temperature). 56 */ 57class MathExprPowerModel : public PowerModelState 58{ 59 public: 60 61 typedef MathExprPowerModelParams Params; 62 MathExprPowerModel(const Params *p); 63 64 /** 65 * Get the dynamic power consumption. 66 * 67 * @return Power (Watts) consumed by this object (dynamic component) 68 */ 69 double getDynamicPower() const { 70 return dyn_expr.eval( 71 std::bind(&MathExprPowerModel::getStatValue, 72 this, std::placeholders::_1) 73 ); 74 } 75 76 /** 77 * Get the static power consumption. 78 * 79 * @return Power (Watts) consumed by this object (static component) 80 */ 81 double getStaticPower() const { 82 return st_expr.eval( 83 std::bind(&MathExprPowerModel::getStatValue, 84 this, std::placeholders::_1) 85 ); 86 } 87 88 /** 89 * Get the value for a variable (maps to a stat) 90 * 91 * @param name Name of the variable to retrieve the value from 92 * 93 * @return Power (Watts) consumed by this object (static component) 94 */ 95 double getStatValue(const std::string & name) const; 96 97 void startup(); 98 99 void regStats(); 100 101 private: 102 103 // Math expressions for dynamic and static power 104 MathExpr dyn_expr, st_expr; 105 106 // Basename of the object in the gem5 stats hierachy 107 std::string basename; 108 109 // Map that contains relevant stats for this power model 110 std::unordered_map<std::string, Stats::Info*> stats_map; 111}; 112 113#endif 114