Alex Voicu
62 рядки
2.1 KiB
C++
62 рядки
2.1 KiB
C++
/*
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Copyright (c) 2015-2016 Advanced Micro Devices, Inc. All rights reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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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 THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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/* HIT_START
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* BUILD: %t %s ../../test_common.cpp
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* HIT_END
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*/
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#include <cstdio>
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#include "hip/hip_runtime.h"
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__global__ void Kernel(hipLaunchParm lp,volatile float* hostRes)
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{
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int tid = hipThreadIdx_x + hipBlockIdx_x * hipBlockDim_x;
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hostRes[tid] = tid + 1;
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__threadfence_system();
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// expecting that the data is getting flushed to host here!
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// time waster for-loop (sleep)
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for (int timeWater = 0; timeWater < 100000000; timeWater++);
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}
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int main()
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{
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size_t blocks = 2;
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volatile float* hostRes;
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hipHostMalloc((void**)&hostRes,blocks*sizeof(float),hipHostMallocMapped);
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hostRes[0]=0;
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hostRes[1]=0;
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hipLaunchKernel(HIP_KERNEL_NAME(Kernel), dim3(1), dim3(blocks), 0, 0, hostRes);
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int eleCounter = 0;
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while (eleCounter < blocks)
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{
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// blocks until the value changes
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while(hostRes[eleCounter] == 0);
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printf("%f\n", hostRes[eleCounter]);;
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eleCounter++;
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}
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hipHostFree((void *)hostRes);
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return 0;
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}
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