52 строки
1.4 KiB
C++
52 строки
1.4 KiB
C++
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/*************************************************************************
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* Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
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*
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* See LICENSE.txt for license information
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************************************************************************/
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#ifndef NCCL_ALLOC_H_
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#define NCCL_ALLOC_H_
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#include "nccl.h"
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#include "checks.h"
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#include <sys/mman.h>
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static inline ncclResult_t ncclCudaHostAlloc(void** ptr, void** devPtr, size_t size) {
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CUDACHECK(cudaHostAlloc(ptr, size, cudaHostAllocMapped));
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memset(*ptr, 0, size);
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*devPtr = *ptr;
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return ncclSuccess;
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}
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static inline ncclResult_t ncclCudaHostFree(void* ptr) {
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CUDACHECK(cudaFreeHost(ptr));
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return ncclSuccess;
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}
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template <typename T>
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static ncclResult_t ncclCalloc(T** ptr, size_t nelem) {
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void* p = malloc(nelem*sizeof(T));
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if (p == NULL) {
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WARN("Failed to malloc %ld bytes", nelem*sizeof(T));
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return ncclSystemError;
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}
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memset(p, 0, nelem*sizeof(T));
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*ptr = (T*)p;
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return ncclSuccess;
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}
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template <typename T>
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static ncclResult_t ncclCudaCalloc(T** ptr, size_t nelem) {
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CUDACHECK(cudaMalloc(ptr, nelem*sizeof(T)));
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CUDACHECK(cudaMemset(*ptr, 0, nelem*sizeof(T)));
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return ncclSuccess;
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}
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template <typename T>
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static ncclResult_t ncclCudaMemcpy(T* dst, T* src, size_t nelem) {
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CUDACHECK(cudaMemcpy(dst, src, nelem*sizeof(T), cudaMemcpyDefault));
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return ncclSuccess;
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}
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#endif
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