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Force Kmd Notify timeout for Windows machines running on battery

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- This is to improve battery usage while waiting in busy loop on CPU
- New Kmd Notify helper to maintain dynamic parameters
- Ask OS about battery status on longer waits
- Pick different timeout when using battery and optimization is disabled

Change-Id: I5f9c8c5a9c635652aac27c707f2b55933947a7fb
This commit is contained in:
Dunajski, Bartosz
2018-04-10 10:26:59 +02:00
committed by sys_ocldev
parent 5fdd853506
commit acf97999f3
17 changed files with 397 additions and 105 deletions
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46
runtime/helpers/kmd_notify_properties.cpp
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@@ -25,41 +25,51 @@
using namespace OCLRT;
bool KmdNotifyProperties::timeoutEnabled(FlushStamp flushStampToWait) const {
return enableKmdNotify && flushStampToWait != 0;
}
int64_t KmdNotifyProperties::pickTimeoutValue(std::chrono::high_resolution_clock::time_point &lastWaitTimestamp,
bool quickKmdSleepRequest, uint32_t currentHwTag, uint32_t taskCountToWait) const {
quickKmdSleepRequest |= applyQuickKmdSleepForSporadicWait(lastWaitTimestamp);
if (quickKmdSleepRequest && enableQuickKmdSleep) {
return delayQuickKmdSleepMicroseconds;
bool KmdNotifyHelper::obtainTimeoutParams(int64_t &timeoutValueOutput,
bool quickKmdSleepRequest,
uint32_t currentHwTag,
uint32_t taskCountToWait,
FlushStamp flushStampToWait) {
int64_t multiplier = (currentHwTag < taskCountToWait) ? static_cast<int64_t>(taskCountToWait - currentHwTag) : 1;
if (!properties->enableKmdNotify && multiplier > KmdNotifyConstants::minimumTaskCountDiffToCheckAcLine) {
updateAcLineStatus();
}
int64_t multiplier = (currentHwTag < taskCountToWait) ? static_cast<int64_t>(taskCountToWait - currentHwTag) : 1;
quickKmdSleepRequest |= applyQuickKmdSleepForSporadicWait();
return delayKmdNotifyMicroseconds * multiplier;
if (!properties->enableKmdNotify && !acLineConnected) {
timeoutValueOutput = KmdNotifyConstants::timeoutInMicrosecondsForDisconnectedAcLine;
} else if (quickKmdSleepRequest && properties->enableQuickKmdSleep) {
timeoutValueOutput = properties->delayQuickKmdSleepMicroseconds;
} else {
timeoutValueOutput = properties->delayKmdNotifyMicroseconds * multiplier;
}
return flushStampToWait != 0 && (properties->enableKmdNotify || !acLineConnected);
}
bool KmdNotifyProperties::applyQuickKmdSleepForSporadicWait(std::chrono::high_resolution_clock::time_point &lastWaitTimestamp) const {
if (enableQuickKmdSleepForSporadicWaits) {
bool KmdNotifyHelper::applyQuickKmdSleepForSporadicWait() const {
if (properties->enableQuickKmdSleepForSporadicWaits) {
auto now = std::chrono::high_resolution_clock::now();
auto timeDiff = std::chrono::duration_cast<std::chrono::microseconds>(now - lastWaitTimestamp).count();
if (timeDiff > delayQuickKmdSleepForSporadicWaitsMicroseconds) {
auto timeDiff = std::chrono::duration_cast<std::chrono::microseconds>(now - lastWaitForCompletionTimestamp).count();
if (timeDiff > properties->delayQuickKmdSleepForSporadicWaitsMicroseconds) {
return true;
}
}
return false;
}
void KmdNotifyProperties::overrideFromDebugVariable(int32_t debugVariableValue, int64_t &destination) {
void KmdNotifyHelper::updateLastWaitForCompletionTimestamp() {
lastWaitForCompletionTimestamp = std::chrono::high_resolution_clock::now();
}
void KmdNotifyHelper::overrideFromDebugVariable(int32_t debugVariableValue, int64_t &destination) {
if (debugVariableValue >= 0) {
destination = static_cast<int64_t>(debugVariableValue);
}
}
void KmdNotifyProperties::overrideFromDebugVariable(int32_t debugVariableValue, bool &destination) {
void KmdNotifyHelper::overrideFromDebugVariable(int32_t debugVariableValue, bool &destination) {
if (debugVariableValue >= 0) {
destination = !!(debugVariableValue);
}