Wenkai Du
81 líneas
2.4 KiB
C++
81 líneas
2.4 KiB
C++
/*************************************************************************
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* Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
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* Modifications Copyright (c) 2019-2020 Advanced Micro Devices, Inc. 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 "align.h"
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#include <sys/mman.h>
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template <typename T>
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static ncclResult_t ncclCudaHostCalloc(T** ptr, size_t nelem) {
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CUDACHECK(hipHostMalloc(ptr, nelem*sizeof(T), hipHostMallocMapped));
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memset(*ptr, 0, nelem*sizeof(T));
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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(hipHostFree(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, bool isFineGrain = false) {
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if (isFineGrain)
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CUDACHECK(hipExtMallocWithFlags((void**)ptr, nelem*sizeof(T), hipDeviceMallocFinegrained));
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else
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CUDACHECK(hipMalloc(ptr, nelem*sizeof(T)));
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CUDACHECK(hipMemset(*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(hipMemcpy(dst, src, nelem*sizeof(T), hipMemcpyDefault));
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return ncclSuccess;
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}
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static bool hasFineGrainVramPcie() {
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int *ptr;
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if (hipExtMallocWithFlags((void**)&ptr, sizeof(int), hipDeviceMallocFinegrained) == hipSuccess) {
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CUDACHECK(hipFree(ptr));
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return true;
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}
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else
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return false;
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}
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// Allocate memory to be potentially ibv_reg_mr'd. This needs to be
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// allocated on separate pages as those pages will be marked DONTFORK
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// and if they are shared, that could cause a crash in a child process
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static ncclResult_t ncclIbMalloc(void** ptr, size_t size) {
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size_t page_size = sysconf(_SC_PAGESIZE);
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void* p;
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int size_aligned = ROUNDUP(size, page_size);
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int ret = posix_memalign(&p, page_size, size_aligned);
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if (ret != 0) return ncclSystemError;
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memset(p, 0, size);
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*ptr = p;
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return ncclSuccess;
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}
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#endif
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