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/*************************************************************************
* Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
*
* See LICENSE.txt for license information
************************************************************************/
#ifndef NCCL_ALLOC_H_
#define NCCL_ALLOC_H_
#include "nccl.h"
#include "checks.h"
#include "align.h"
#include <sys/mman.h>
template <typename T>
static ncclResult_t ncclCudaHostCalloc(T** ptr, size_t nelem) {
CUDACHECK(cudaHostAlloc(ptr, nelem*sizeof(T), cudaHostAllocMapped));
memset(*ptr, 0, nelem*sizeof(T));
return ncclSuccess;
}
static inline ncclResult_t ncclCudaHostFree(void* ptr) {
CUDACHECK(cudaFreeHost(ptr));
return ncclSuccess;
}
template <typename T>
static ncclResult_t ncclCalloc(T** ptr, size_t nelem) {
void* p = malloc(nelem*sizeof(T));
if (p == NULL) {
WARN("Failed to malloc %ld bytes", nelem*sizeof(T));
return ncclSystemError;
}
memset(p, 0, nelem*sizeof(T));
*ptr = (T*)p;
return ncclSuccess;
}
template <typename T>
static ncclResult_t ncclCudaCalloc(T** ptr, size_t nelem) {
CUDACHECK(cudaMalloc(ptr, nelem*sizeof(T)));
CUDACHECK(cudaMemset(*ptr, 0, nelem*sizeof(T)));
return ncclSuccess;
}
template <typename T>
static ncclResult_t ncclCudaMemcpy(T* dst, T* src, size_t nelem) {
CUDACHECK(cudaMemcpy(dst, src, nelem*sizeof(T), cudaMemcpyDefault));
return ncclSuccess;
}
// Allocate memory to be potentially ibv_reg_mr'd. This needs to be
// allocated on separate pages as those pages will be marked DONTFORK
// and if they are shared, that could cause a crash in a child process
static ncclResult_t ncclIbMalloc(void** ptr, size_t size) {
size_t page_size = sysconf(_SC_PAGESIZE);
void* p;
int size_aligned = ROUNDUP(size, page_size);
int ret = posix_memalign(&p, page_size, size_aligned);
if (ret != 0) return ncclSystemError;
memset(p, 0, size);
*ptr = p;
return ncclSuccess;
}
#endif
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