mathexpr_powermodel.cc (11527:9007a9729815) mathexpr_powermodel.cc (11967:e963e6ce139b)
1/*
1/*
2 * Copyright (c) 2016 ARM Limited
2 * Copyright (c) 2016-2017 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

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41
42#include "base/statistics.hh"
43#include "params/MathExprPowerModel.hh"
44#include "sim/mathexpr.hh"
45#include "sim/power/thermal_model.hh"
46#include "sim/sim_object.hh"
47
48MathExprPowerModel::MathExprPowerModel(const Params *p)
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

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41
42#include "base/statistics.hh"
43#include "params/MathExprPowerModel.hh"
44#include "sim/mathexpr.hh"
45#include "sim/power/thermal_model.hh"
46#include "sim/sim_object.hh"
47
48MathExprPowerModel::MathExprPowerModel(const Params *p)
49 : PowerModelState(p), dyn_expr(p->dyn), st_expr(p->st)
49 : PowerModelState(p), dyn_expr(p->dyn), st_expr(p->st), failed(false)
50{
51 // Calculate the name of the object we belong to
52 std::vector<std::string> path;
53 tokenize(path, name(), '.', true);
54 // It's something like xyz.power_model.pm2
55 assert(path.size() > 2);
56 for (unsigned i = 0; i < path.size() - 2; i++)
57 basename += path[i] + ".";
58}
59
60void
61MathExprPowerModel::startup()
62{
63 // Create a map with stats and pointers for quick access
64 // Has to be done here, since we need access to the statsList
65 for (auto & i: Stats::statsList())
66 if (i->name.find(basename) == 0)
67 stats_map[i->name.substr(basename.size())] = i;
50{
51 // Calculate the name of the object we belong to
52 std::vector<std::string> path;
53 tokenize(path, name(), '.', true);
54 // It's something like xyz.power_model.pm2
55 assert(path.size() > 2);
56 for (unsigned i = 0; i < path.size() - 2; i++)
57 basename += path[i] + ".";
58}
59
60void
61MathExprPowerModel::startup()
62{
63 // Create a map with stats and pointers for quick access
64 // Has to be done here, since we need access to the statsList
65 for (auto & i: Stats::statsList())
66 if (i->name.find(basename) == 0)
67 stats_map[i->name.substr(basename.size())] = i;
68
69 tryEval(st_expr);
70 const bool st_failed = failed;
71
72 tryEval(dyn_expr);
73 const bool dyn_failed = failed;
74
75 if (st_failed || dyn_failed) {
76 const auto *p = dynamic_cast<const Params *>(params());
77 assert(p);
78
79 fatal("Failed to evaluate power expressions:\n%s%s%s\n",
80 st_failed ? p->st : "",
81 st_failed && dyn_failed ? "\n" : "",
82 dyn_failed ? p->dyn : "");
83 }
68}
69
70double
84}
85
86double
87MathExprPowerModel::eval(const MathExpr &expr) const
88{
89 const double value = tryEval(expr);
90
91 // This shouldn't happen unless something went wrong the equations
92 // were verified in startup().
93 panic_if(failed, "Failed to evaluate power expression '%s'\n",
94 expr.toStr());
95
96 return value;
97}
98
99double
100MathExprPowerModel::tryEval(const MathExpr &expr) const
101{
102 failed = false;
103 const double value = expr.eval(
104 std::bind(&MathExprPowerModel::getStatValue,
105 this, std::placeholders::_1)
106 );
107
108 return value;
109}
110
111
112double
71MathExprPowerModel::getStatValue(const std::string &name) const
72{
73 using namespace Stats;
74
75 // Automatic variables:
76 if (name == "temp")
77 return _temp;
78
79 // Try to cast the stat, only these are supported right now
113MathExprPowerModel::getStatValue(const std::string &name) const
114{
115 using namespace Stats;
116
117 // Automatic variables:
118 if (name == "temp")
119 return _temp;
120
121 // Try to cast the stat, only these are supported right now
80 Info *info = stats_map.at(name);
122 const auto it = stats_map.find(name);
123 if (it == stats_map.cend()) {
124 warn("Failed to find stat '%s'\n", name);
125 failed = true;
126 return 0;
127 }
81
128
82 ScalarInfo *si = dynamic_cast<ScalarInfo*>(info);
129 const Info *info = it->second;
130
131 auto si = dynamic_cast<const ScalarInfo *>(info);
83 if (si)
84 return si->value();
132 if (si)
133 return si->value();
85 FormulaInfo *fi = dynamic_cast<FormulaInfo*>(info);
134 auto fi = dynamic_cast<const FormulaInfo *>(info);
86 if (fi)
87 return fi->total();
88
89 panic("Unknown stat type!\n");
90}
91
92void
93MathExprPowerModel::regStats()
94{
95 PowerModelState::regStats();
96}
97
98MathExprPowerModel*
99MathExprPowerModelParams::create()
100{
101 return new MathExprPowerModel(this);
102}
135 if (fi)
136 return fi->total();
137
138 panic("Unknown stat type!\n");
139}
140
141void
142MathExprPowerModel::regStats()
143{
144 PowerModelState::regStats();
145}
146
147MathExprPowerModel*
148MathExprPowerModelParams::create()
149{
150 return new MathExprPowerModel(this);
151}