Rahul Manocha
87 lines
3.0 KiB
C++
87 lines
3.0 KiB
C++
/* Copyright (c) 2024 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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#if __linux__
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#include <stdlib.h>
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#include <iostream>
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#include "hip/hip_runtime_api.h"
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#include "hip/hip_runtime.h"
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#define HIP_CHECK(error) \
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{ \
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hipError_t localError = error; \
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if ((localError != hipSuccess) && \
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(localError != hipErrorPeerAccessAlreadyEnabled)) { \
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return -1; \
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} \
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}
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// Kernel
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__global__ void MemAdvise_Exe(int *Hmm, int n) {
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size_t offset = (blockIdx.x * blockDim.x + threadIdx.x);
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size_t stride = blockDim.x * gridDim.x;
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for (int i = offset; i < n; i+=stride) {
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Hmm[i] += 10;
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}
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}
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static int hipMemAdvise_AlignedAllocMem_Exe() {
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int managedMem = 0, pageMemAccess = 0;
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HIP_CHECK(hipDeviceGetAttribute(&pageMemAccess,
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hipDeviceAttributePageableMemoryAccess, 0));
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std::cout << "\n hipDeviceAttributePageableMemoryAccess:" << pageMemAccess;
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HIP_CHECK(hipDeviceGetAttribute(&managedMem,
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hipDeviceAttributeManagedMemory, 0));
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std::cout << "\n hipDeviceAttributeManagedMemory: " << managedMem;
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if ((managedMem == 1) && (pageMemAccess == 1)) {
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int *Mllc = nullptr, MemSz = 4096 * 4, NumElms = 4096, InitVal = 123;
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Mllc = reinterpret_cast<int*>(aligned_alloc(4096, MemSz));
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for (int i = 0; i < NumElms; ++i) {
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Mllc[i] = InitVal;
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}
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hipStream_t strm;
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int DataMismatch = 0;
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HIP_CHECK(hipStreamCreate(&strm));
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// The following hipMemAdvise() call is made to know if advise on
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// aligned_alloc() is causing any issue
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HIP_CHECK(hipMemAdvise(Mllc, MemSz, hipMemAdviseSetPreferredLocation, 0));
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HIP_CHECK(hipMemPrefetchAsync(Mllc, MemSz, 0, strm));
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HIP_CHECK(hipStreamSynchronize(strm));
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MemAdvise_Exe<<<(NumElms/32), 32, 0, strm>>>(Mllc, NumElms);
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HIP_CHECK(hipStreamSynchronize(strm));
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for (int i = 0; i < NumElms; ++i) {
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if (Mllc[i] != (InitVal + 10)) {
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DataMismatch++;
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}
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}
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if (DataMismatch != 0) return -1;
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}
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return 0;
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}
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int main() {
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return hipMemAdvise_AlignedAllocMem_Exe();
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}
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#endif
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