gem5  v21.1.0.2
mathexpr_powermodel.cc
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37 
39 
40 #include <string>
41 
42 #include "base/statistics.hh"
43 #include "params/MathExprPowerModel.hh"
44 #include "sim/mathexpr.hh"
46 #include "sim/sim_object.hh"
47 
48 namespace gem5
49 {
50 
52  : PowerModelState(p), dyn_expr(p.dyn), st_expr(p.st)
53 {
54 }
55 
56 void
58 {
59  for (auto expr: {dyn_expr, st_expr}) {
60  std::vector<std::string> vars = expr.getVariables();
61 
62  for (auto var: vars) {
63  // Automatic variables:
64  if (var == "temp" || var == "voltage" || var == "clock_period") {
65  continue;
66  }
67 
68  auto *info = statistics::resolve(var);
69  fatal_if(!info, "Failed to evaluate %s in expression:\n%s\n",
70  var, expr.toStr());
71  statsMap[var] = info;
72  }
73  }
74 }
75 
76 double
78 {
79  return expr.eval(
81  this, std::placeholders::_1)
82  );
83 }
84 
85 double
86 MathExprPowerModel::getStatValue(const std::string &name) const
87 {
88  using namespace statistics;
89 
90  // Automatic variables:
91  if (name == "temp") {
92  return _temp.toCelsius();
93  } else if (name == "voltage") {
94  return clocked_object->voltage();
95  } else if (name=="clock_period") {
96  return clocked_object->clockPeriod();
97  }
98 
99  const auto it = statsMap.find(name);
100  assert(it != statsMap.cend());
101  const Info *info = it->second;
102 
103  // Try to cast the stat, only these are supported right now
104  auto si = dynamic_cast<const ScalarInfo *>(info);
105  if (si)
106  return si->value();
107  auto fi = dynamic_cast<const FormulaInfo *>(info);
108  if (fi)
109  return fi->total();
110 
111  panic("Unknown stat type!\n");
112 }
113 
114 void
116 {
118 }
119 
120 } // namespace gem5
gem5::Temperature::toCelsius
constexpr double toCelsius() const
Definition: temperature.hh:69
gem5::MathExpr::eval
double eval(EvalCallback fn) const
Evaluates the expression.
Definition: mathexpr.hh:72
gem5::MathExprPowerModel::regStats
void regStats() override
Callback to set stat parameters.
Definition: mathexpr_powermodel.cc:115
mathexpr.hh
gem5::statistics::resolve
const Info * resolve(const std::string &name)
Definition: statistics.cc:313
gem5::PowerModelState::clocked_object
ClockedObject * clocked_object
The clocked object we belong to.
Definition: power_model.hh:96
gem5::MathExprPowerModel::eval
double eval(const MathExpr &expr) const
Evaluate an expression in the context of this object, fatal if evaluation fails.
Definition: mathexpr_powermodel.cc:77
gem5::ArmISA::fi
Bitfield< 21 > fi
Definition: misc_types.hh:353
gem5::statistics::ScalarInfo
Definition: info.hh:176
std::vector< std::string >
thermal_model.hh
gem5::MathExprPowerModel::st_expr
MathExpr st_expr
Definition: mathexpr_powermodel.hh:104
gem5::MathExpr
Definition: mathexpr.hh:50
gem5::MathExprPowerModel::dyn_expr
MathExpr dyn_expr
Definition: mathexpr_powermodel.hh:104
gem5::Named::name
virtual std::string name() const
Definition: named.hh:47
gem5::MathExprPowerModel::getStatValue
double getStatValue(const std::string &name) const
Get the value for a variable (maps to a stat)
Definition: mathexpr_powermodel.cc:86
sim_object.hh
gem5::MathExprPowerModel::statsMap
std::unordered_map< std::string, const statistics::Info * > statsMap
Definition: mathexpr_powermodel.hh:107
gem5::MipsISA::p
Bitfield< 0 > p
Definition: pra_constants.hh:326
statistics.hh
gem5::MathExprPowerModel::Params
MathExprPowerModelParams Params
Definition: mathexpr_powermodel.hh:64
gem5::Clocked::voltage
double voltage() const
Definition: clocked_object.hh:219
gem5::MathExprPowerModel::startup
void startup() override
startup() is the final initialization call before simulation.
Definition: mathexpr_powermodel.cc:57
gem5::ArmISA::si
Bitfield< 6 > si
Definition: misc_types.hh:772
name
const std::string & name()
Definition: trace.cc:49
gem5::statistics::Group::regStats
virtual void regStats()
Callback to set stat parameters.
Definition: group.cc:69
mathexpr_powermodel.hh
gem5::PowerModelState::_temp
Temperature _temp
Current temperature.
Definition: power_model.hh:93
gem5::MathExprPowerModel::MathExprPowerModel
MathExprPowerModel(const Params &p)
Definition: mathexpr_powermodel.cc:51
gem5::PowerModelState
A PowerModelState is an abstract class used as interface to get power figures out of SimObjects.
Definition: power_model.hh:58
fatal_if
#define fatal_if(cond,...)
Conditional fatal macro that checks the supplied condition and only causes a fatal error if the condi...
Definition: logging.hh:225
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40
gem5::ArmISA::st
Bitfield< 31, 28 > st
Definition: misc_types.hh:155
gem5::statistics::FormulaInfo
Definition: info.hh:245
panic
#define panic(...)
This implements a cprintf based panic() function.
Definition: logging.hh:177
gem5::statistics::Info
Definition: info.hh:80
gem5::Clocked::clockPeriod
Tick clockPeriod() const
Definition: clocked_object.hh:217

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