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don't hardcode Energy Status Units

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Fixes deviating power usage readings
This commit is contained in:
Jussi Kuokkanen 2023-12-08 19:33:13 +02:00
parent 645fe98e9b
commit a72d27c071
1 changed files with 21 additions and 6 deletions
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27
src/plugins/CPU.cpp
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@ -517,12 +517,27 @@ std::vector<TreeNode<DeviceNode>> getUtilizations(CPUData data) {
return retval;
}
double toWatts(EnergyState current, EnergyState previous) {
double energyCounterFactor(CPUData data) {
static std::unordered_map<uint, double> factors;
if (factors.find(data.cpuIndex) == factors.end()) {
// No value yet
// Bits 8:12
auto unit = readMsr(0x606, 0x1f00, data.firstCoreIndex);
if (!unit.has_value())
// Assume 14 ESU; 61 uJ increment
factors[data.cpuIndex] = (1 / pow(2, 14));
else
factors[data.cpuIndex] = (1 / pow(2, (*unit >> 8)));
}
return factors[data.cpuIndex];
}
double toWatts(EnergyState current, EnergyState previous, CPUData data) {
auto counterDelta = current.counter - previous.counter;
// us -> s
double delta_s = (current.usecs - previous.usecs) / 1000000.0;
// Counter is 61 uJ increments
double delta_j = (counterDelta * 61) / 1000000.0;
double delta_j = (counterDelta * energyCounterFactor(data));
return delta_j / delta_s;
}
@ -570,7 +585,7 @@ std::vector<TreeNode<DeviceNode>> getTotalPowerUsage(CPUData data) {
auto prevState = prevStates[data.cpuIndex];
prevStates[data.cpuIndex] = *curState;
return toWatts(*curState, prevState);
return toWatts(*curState, prevState, data);
};
if (!hasReadableValue(func()))
@ -607,7 +622,7 @@ std::vector<TreeNode<DeviceNode>> getDramPowerUsage(CPUData data) {
auto prevState = prevStates[data.cpuIndex];
prevStates[data.cpuIndex] = *curState;
return toWatts(*curState, prevState);
return toWatts(*curState, prevState, data);
};
if (!hasReadableValue(func()))
@ -644,7 +659,7 @@ std::vector<TreeNode<DeviceNode>> getCorePowerUsage(CPUData data) {
auto prevState = prevStates[data.cpuIndex];
prevStates[data.cpuIndex] = *curState;
return toWatts(*curState, prevState);
return toWatts(*curState, prevState, data);
};
if (!hasReadableValue(func()))