82 lines
3.3 KiB
C++
82 lines
3.3 KiB
C++
/*
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* Copyright (c) 2018, Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include "runtime/helpers/completion_stamp.h"
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#include <cstdint>
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#include <chrono>
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#include <atomic>
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namespace OCLRT {
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struct KmdNotifyProperties {
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// Main switch for KMD Notify optimization - if its disabled, all below are disabled too
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bool enableKmdNotify;
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int64_t delayKmdNotifyMicroseconds;
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// Use smaller delay in specific situations (ie. from AsyncEventsHandler)
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bool enableQuickKmdSleep;
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int64_t delayQuickKmdSleepMicroseconds;
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// If waits are called sporadically use QuickKmdSleep mode, otherwise use standard delay
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bool enableQuickKmdSleepForSporadicWaits;
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int64_t delayQuickKmdSleepForSporadicWaitsMicroseconds;
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};
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namespace KmdNotifyConstants {
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constexpr int64_t timeoutInMicrosecondsForDisconnectedAcLine = 10000;
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constexpr uint32_t minimumTaskCountDiffToCheckAcLine = 10;
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} // namespace KmdNotifyConstants
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class KmdNotifyHelper {
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public:
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KmdNotifyHelper() = delete;
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KmdNotifyHelper(const KmdNotifyProperties *properties) : properties(properties){};
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MOCKABLE_VIRTUAL ~KmdNotifyHelper() = default;
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bool 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 quickKmdSleepForSporadicWaitsEnabled() const { return properties->enableQuickKmdSleepForSporadicWaits; }
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MOCKABLE_VIRTUAL void updateLastWaitForCompletionTimestamp();
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MOCKABLE_VIRTUAL void updateAcLineStatus();
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static void overrideFromDebugVariable(int32_t debugVariableValue, int64_t &destination);
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static void overrideFromDebugVariable(int32_t debugVariableValue, bool &destination);
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void initMaxPowerSavingMode() {
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maxPowerSavingMode = true;
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}
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protected:
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bool applyQuickKmdSleepForSporadicWait() const;
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int64_t getBaseTimeout(const int64_t &multiplier) const;
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int64_t getMicrosecondsSinceEpoch() const;
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const KmdNotifyProperties *properties = nullptr;
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std::atomic<int64_t> lastWaitForCompletionTimestampUs{0};
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std::atomic<bool> acLineConnected{true};
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bool maxPowerSavingMode = false;
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};
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} // namespace OCLRT
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