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https://github.com/intel/compute-runtime.git
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08424d798f
- When queue is created with throttle hint low it should be power conservative - With this change whenever queues with low throttle setting requests wait for GPU completion, such wait will be handled in power conservative manner. - Whenever GPU is not completed, waiting thread will be put to sleep and will for GPU completion that triggers the wake up interrupt. Change-Id: I9f34872a38ab9f5952f9d9623ea43503fc3dd587
79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
/*
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* Copyright (C) 2018 Intel Corporation
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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#include <cstdint>
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#include "runtime/helpers/kmd_notify_properties.h"
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#include "runtime/os_interface/debug_settings_manager.h"
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using namespace OCLRT;
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bool KmdNotifyHelper::obtainTimeoutParams(int64_t &timeoutValueOutput,
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bool quickKmdSleepRequest,
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uint32_t currentHwTag,
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uint32_t taskCountToWait,
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FlushStamp flushStampToWait,
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bool forcePowerSavingMode) {
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if (flushStampToWait == 0) {
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return false;
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}
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if (DebugManager.flags.PowerSavingMode.get() || forcePowerSavingMode) {
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timeoutValueOutput = 1;
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return true;
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}
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int64_t multiplier = (currentHwTag < taskCountToWait) ? static_cast<int64_t>(taskCountToWait - currentHwTag) : 1;
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if (!properties->enableKmdNotify && multiplier > KmdNotifyConstants::minimumTaskCountDiffToCheckAcLine) {
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updateAcLineStatus();
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}
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quickKmdSleepRequest |= applyQuickKmdSleepForSporadicWait();
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if (maxPowerSavingMode) {
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timeoutValueOutput = 1;
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} else if (!properties->enableKmdNotify && !acLineConnected) {
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timeoutValueOutput = KmdNotifyConstants::timeoutInMicrosecondsForDisconnectedAcLine;
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} else if (quickKmdSleepRequest && properties->enableQuickKmdSleep) {
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timeoutValueOutput = properties->delayQuickKmdSleepMicroseconds;
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} else {
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timeoutValueOutput = getBaseTimeout(multiplier);
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}
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return (properties->enableKmdNotify || !acLineConnected);
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}
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bool KmdNotifyHelper::applyQuickKmdSleepForSporadicWait() const {
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if (properties->enableQuickKmdSleepForSporadicWaits) {
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auto timeDiff = getMicrosecondsSinceEpoch() - lastWaitForCompletionTimestampUs.load();
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if (timeDiff > properties->delayQuickKmdSleepForSporadicWaitsMicroseconds) {
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return true;
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}
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}
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return false;
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}
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void KmdNotifyHelper::updateLastWaitForCompletionTimestamp() {
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lastWaitForCompletionTimestampUs = getMicrosecondsSinceEpoch();
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}
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int64_t KmdNotifyHelper::getMicrosecondsSinceEpoch() const {
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auto now = std::chrono::high_resolution_clock::now().time_since_epoch();
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return std::chrono::duration_cast<std::chrono::microseconds>(now).count();
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}
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void KmdNotifyHelper::overrideFromDebugVariable(int32_t debugVariableValue, int64_t &destination) {
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if (debugVariableValue >= 0) {
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destination = static_cast<int64_t>(debugVariableValue);
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}
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}
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void KmdNotifyHelper::overrideFromDebugVariable(int32_t debugVariableValue, bool &destination) {
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if (debugVariableValue >= 0) {
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destination = !!(debugVariableValue);
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}
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}
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