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/*
* Copyright (C) 2020-2025 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "level_zero/core/source/fence/fence.h"
#include "shared/source/command_stream/command_stream_receiver.h"
#include "level_zero/core/source/cmdqueue/cmdqueue_imp.h"
#include <limits>
namespace L0 {
namespace FenceDefinition {
static constexpr TaskCountType fenceNotReady = NEO::CompletionStamp::notReady;
} // namespace FenceDefinition
Fence *Fence::create(CommandQueueImp *cmdQueue, const ze_fence_desc_t *desc) {
auto fence = new Fence(cmdQueue);
UNRECOVERABLE_IF(fence == nullptr);
fence->reset(!!(desc->flags & ZE_FENCE_FLAG_SIGNALED));
return fence;
}
ze_result_t Fence::queryStatus() {
auto csr = cmdQueue->getCsr();
csr->downloadAllocations(true);
auto *hostAddr = csr->getTagAddress();
return csr->testTaskCountReady(hostAddr, taskCount) ? ZE_RESULT_SUCCESS : ZE_RESULT_NOT_READY;
}
ze_result_t Fence::assignTaskCountFromCsr() {
auto csr = cmdQueue->getCsr();
taskCount = csr->peekTaskCount() + 1;
return ZE_RESULT_SUCCESS;
}
ze_result_t Fence::reset(bool signaled) {
if (signaled) {
taskCount = 0;
} else {
taskCount = FenceDefinition::fenceNotReady;
}
return ZE_RESULT_SUCCESS;
}
ze_result_t Fence::hostSynchronize(uint64_t timeout) {
std::chrono::high_resolution_clock::time_point waitStartTime, lastHangCheckTime, currentTime;
uint64_t timeDiff = 0;
ze_result_t ret = ZE_RESULT_NOT_READY;
const auto csr = cmdQueue->getCsr();
if (csr->getType() == NEO::CommandStreamReceiverType::aub) {
return ZE_RESULT_SUCCESS;
}
if (FenceDefinition::fenceNotReady == taskCount) {
return ZE_RESULT_NOT_READY;
}
waitStartTime = std::chrono::high_resolution_clock::now();
lastHangCheckTime = waitStartTime;
do {
ret = queryStatus();
if (ret == ZE_RESULT_SUCCESS) {
cmdQueue->printKernelsPrintfOutput(false);
cmdQueue->checkAssert();
return ZE_RESULT_SUCCESS;
}
currentTime = std::chrono::high_resolution_clock::now();
if (csr->checkGpuHangDetected(currentTime, lastHangCheckTime)) {
cmdQueue->printKernelsPrintfOutput(true);
cmdQueue->checkAssert();
return ZE_RESULT_ERROR_DEVICE_LOST;
}
if (timeout == std::numeric_limits<uint64_t>::max()) {
continue;
} else if (timeout == 0) {
break;
}
timeDiff = std::chrono::duration_cast<std::chrono::nanoseconds>(currentTime - waitStartTime).count();
} while (timeDiff < timeout);
return ret;
}
} // namespace L0
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