gem5  v21.1.0.2
power_model.cc
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37 
38 #include "sim/power/power_model.hh"
39 
40 #include "base/statistics.hh"
41 #include "params/PowerModel.hh"
42 #include "params/PowerModelState.hh"
43 #include "sim/clocked_object.hh"
44 #include "sim/sub_system.hh"
45 
46 namespace gem5
47 {
48 
50  : SimObject(p), _temp(0), clocked_object(NULL),
51  ADD_STAT(dynamicPower, statistics::units::Watt::get(),
52  "Dynamic power for this object (Watts)"),
53  ADD_STAT(staticPower, statistics::units::Watt::get(),
54  "Static power for this object (Watts)")
55 {
60 }
61 
63  : SimObject(p), states_pm(p.pm), subsystem(p.subsystem),
64  clocked_object(NULL), power_model_type(p.pm_type),
65  ADD_STAT(dynamicPower, statistics::units::Watt::get(),
66  "Dynamic power for this power state"),
67  ADD_STAT(staticPower, statistics::units::Watt::get(),
68  "Static power for this power state")
69 {
70  panic_if(subsystem == NULL,
71  "Subsystem is NULL! This is not acceptable for a PowerModel!\n");
73  // The temperature passed here will be overwritten, if there is
74  // a thermal model present
75  for (auto & pms: states_pm){
76  pms->setTemperature(p.ambient_temp);
77  }
78 
83 
84 }
85 
86 void
88 {
89  this->clocked_object = clkobj;
90 
91  for (auto & pms: states_pm)
92  pms->setClockedObject(clkobj);
93 }
94 
95 void
97 {
98  for (auto & pms: states_pm)
99  pms->setTemperature(temp);
100 }
101 
102 void
104 {
106  *this, this->subsystem->getProbeManager(), "thermalUpdate"
107  ));
108 }
109 
110 double
112 {
113  assert(clocked_object);
114 
115  if (power_model_type == enums::PMType::Static) {
116  // This power model only collects static data
117  return 0;
118  }
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  warn_if(w[enums::PwrState::UNDEFINED] > 0,
126  "SimObject in UNDEFINED power state! Power figures might be wrong!\n");
127 
128  double power = 0;
129  for (unsigned i = 0; i < states_pm.size(); i++)
130  if (w[i + 1] > 0.0f)
131  power += states_pm[i]->getDynamicPower() * w[i + 1];
132 
133  return power;
134 }
135 
136 double
138 {
139  assert(clocked_object);
140 
142 
143  if (power_model_type == enums::PMType::Dynamic) {
144  // This power model only collects dynamic data
145  return 0;
146  }
147 
148  // Same number of states (excluding UNDEFINED)
149  assert(w.size() - 1 == states_pm.size());
150 
151  // Make sure we have no UNDEFINED state
152  if (w[0] > 0)
153  warn("SimObject in UNDEFINED power state! "
154  "Power figures might be wrong!\n");
155 
156  // We have N+1 states, being state #0 the default 'UNDEFINED' state
157  double power = 0;
158  for (unsigned i = 0; i < states_pm.size(); i++)
159  // Don't evaluate power if the object hasn't been in that state
160  // This fixes issues with NaNs and similar.
161  if (w[i + 1] > 0.0f)
162  power += states_pm[i]->getStaticPower() * w[i + 1];
163 
164  return power;
165 }
166 
167 } // namespace gem5
gem5::PowerModel::subsystem
SubSystem * subsystem
The subsystem this power model belongs to.
Definition: power_model.hh:159
gem5::PowerModel::regProbePoints
virtual void regProbePoints()
Register probe points for this object.
Definition: power_model.cc:103
warn
#define warn(...)
Definition: logging.hh:245
gem5::PowerModel::getStaticPower
double getStaticPower() const
Get the static power consumption.
Definition: power_model.cc:137
gem5::MipsISA::w
Bitfield< 0 > w
Definition: pra_constants.hh:281
power_model.hh
gem5::PowerModelState::getStaticPower
virtual double getStaticPower() const =0
Get the static power consumption.
gem5::PowerModelState::Params
PowerModelStateParams Params
Definition: power_model.hh:62
gem5::ArmISA::f
Bitfield< 6 > f
Definition: misc_types.hh:67
std::vector< double >
gem5::PowerModel::Params
PowerModelParams Params
Definition: power_model.hh:111
gem5::Temperature
The class stores temperatures in Kelvin and provides helper methods to convert to/from Celsius.
Definition: temperature.hh:50
gem5::statistics::ValueBase::method
Derived & method(T *obj, V(T::*method)() const)
Extended functor that calls the specified method of the provided object.
Definition: statistics.hh:763
gem5::ArmISA::i
Bitfield< 7 > i
Definition: misc_types.hh:66
gem5::PowerModel::PowerModel
PowerModel(const Params &p)
Definition: power_model.cc:62
gem5::PowerModelState::getDynamicPower
virtual double getDynamicPower() const =0
Get the dynamic power consumption.
gem5::PowerModel::staticPower
statistics::Value staticPower
Definition: power_model.hh:167
ADD_STAT
#define ADD_STAT(n,...)
Convenience macro to add a stat to a statistics group.
Definition: group.hh:75
gem5::MipsISA::p
Bitfield< 0 > p
Definition: pra_constants.hh:326
statistics.hh
gem5::PowerModel::getDynamicPower
double getDynamicPower() const
Get the dynamic power consumption.
Definition: power_model.cc:111
gem5::SimObject
Abstract superclass for simulation objects.
Definition: sim_object.hh:146
gem5::SubSystem::registerPowerProducer
void registerPowerProducer(PowerModel *pm)
Definition: sub_system.hh:70
gem5::PowerModel::power_model_type
enums::PMType power_model_type
The type of power model - collects all power, static or dynamic only.
Definition: power_model.hh:165
gem5::PowerModelState::dynamicPower
statistics::Value dynamicPower
Definition: power_model.hh:98
gem5::PowerModel::thermalUpdateCallback
void thermalUpdateCallback(const Temperature &temp)
Definition: power_model.cc:96
gem5::ClockedObject
The ClockedObject class extends the SimObject with a clock and accessor functions to relate ticks to ...
Definition: clocked_object.hh:234
gem5::ClockedObject::powerState
PowerState * powerState
Definition: clocked_object.hh:245
gem5::PowerModel::clocked_object
ClockedObject * clocked_object
The clocked object we belong to.
Definition: power_model.hh:162
gem5::PowerModel::states_pm
std::vector< PowerModelState * > states_pm
Actual power models (one per power state)
Definition: power_model.hh:153
gem5::PowerModel::setClockedObject
void setClockedObject(ClockedObject *clkobj)
Definition: power_model.cc:87
gem5::PowerModelState::staticPower
statistics::Value staticPower
Definition: power_model.hh:98
gem5::SimObject::getProbeManager
ProbeManager * getProbeManager()
Get the probe manager for this object.
Definition: sim_object.cc:120
warn_if
#define warn_if(cond,...)
Conditional warning macro that checks the supplied condition and only prints a warning if the conditi...
Definition: logging.hh:272
panic_if
#define panic_if(cond,...)
Conditional panic macro that checks the supplied condition and only panics if the condition is true a...
Definition: logging.hh:203
sub_system.hh
clocked_object.hh
gem5::PowerModel::ThermalProbeListener
Listener class to catch thermal events.
Definition: power_model.hh:136
gem5::PowerModel::dynamicPower
statistics::Value dynamicPower
Definition: power_model.hh:167
gem5::PowerState::getWeights
std::vector< double > getWeights() const
Returns the percentage residency for each power state.
Definition: power_state.cc:205
gem5::PowerModel::thermalListener
std::unique_ptr< ThermalProbeListener > thermalListener
Listener to catch temperature changes in the SubSystem.
Definition: power_model.hh:156
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40
gem5::PowerModelState::PowerModelState
PowerModelState(const Params &p)
Definition: power_model.cc:49

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