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/*
* Copyright (C) 2019-2020 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "level_zero/core/source/fence/fence.h"
#include "shared/source/command_stream/command_stream_receiver.h"
#include "shared/source/helpers/constants.h"
#include "shared/source/memory_manager/memory_manager.h"
#include "shared/source/utilities/cpuintrinsics.h"
#include "hw_helpers.h"
namespace L0 {
Fence *Fence::create(CommandQueueImp *cmdQueue, const ze_fence_desc_t *desc) {
auto fence = new FenceImp(cmdQueue);
UNRECOVERABLE_IF(fence == nullptr);
fence->initialize();
return fence;
}
FenceImp::~FenceImp() {
cmdQueue->getDevice()->getDriverHandle()->getMemoryManager()->freeGraphicsMemory(allocation);
allocation = nullptr;
}
ze_result_t FenceImp::queryStatus() {
auto csr = cmdQueue->getCsr();
if (csr) {
csr->downloadAllocations();
}
auto hostAddr = static_cast<uint64_t *>(allocation->getUnderlyingBuffer());
return *hostAddr == Fence::STATE_CLEARED ? ZE_RESULT_NOT_READY : ZE_RESULT_SUCCESS;
}
void FenceImp::initialize() {
NEO::AllocationProperties properties(
cmdQueue->getDevice()->getRootDeviceIndex(), MemoryConstants::cacheLineSize, NEO::GraphicsAllocation::AllocationType::BUFFER_HOST_MEMORY, cmdQueue->getDevice()->getNEODevice()->getDeviceBitfield());
properties.alignment = MemoryConstants::cacheLineSize;
allocation = cmdQueue->getDevice()->getDriverHandle()->getMemoryManager()->allocateGraphicsMemoryWithProperties(properties);
UNRECOVERABLE_IF(allocation == nullptr);
reset();
}
ze_result_t FenceImp::reset() {
auto hostAddress = static_cast<uint64_t *>(allocation->getUnderlyingBuffer());
*(hostAddress) = Fence::STATE_CLEARED;
NEO::CpuIntrinsics::clFlush(hostAddress);
return ZE_RESULT_SUCCESS;
}
ze_result_t FenceImp::hostSynchronize(uint64_t timeout) {
std::chrono::high_resolution_clock::time_point time1, time2;
uint64_t timeDiff = 0;
ze_result_t ret = ZE_RESULT_NOT_READY;
if (cmdQueue->getCsr()->getType() == NEO::CommandStreamReceiverType::CSR_AUB) {
return ZE_RESULT_SUCCESS;
}
if (timeout == 0) {
return queryStatus();
}
time1 = std::chrono::high_resolution_clock::now();
while (timeDiff < timeout) {
ret = queryStatus();
if (ret == ZE_RESULT_SUCCESS) {
return ZE_RESULT_SUCCESS;
}
std::this_thread::yield();
NEO::CpuIntrinsics::pause();
if (timeout == std::numeric_limits<uint64_t>::max()) {
continue;
}
time2 = std::chrono::high_resolution_clock::now();
timeDiff = std::chrono::duration_cast<std::chrono::nanoseconds>(time2 - time1).count();
}
return ret;
}
} // namespace L0
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