Wenkai Du
131 строка
4.6 KiB
C++
131 строка
4.6 KiB
C++
/*************************************************************************
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* Copyright (c) 2019-2022, NVIDIA CORPORATION. All rights reserved.
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* Modifications Copyright (c) 2019-2022 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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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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template <typename T>
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static ncclResult_t ncclCudaHostCallocDebug(T** ptr, size_t nelem, const char *filefunc, int line) {
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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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INFO(NCCL_ALLOC, "%s:%d Cuda Host Alloc Size %ld pointer %p", filefunc, line, nelem*sizeof(T), *ptr);
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return ncclSuccess;
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}
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#define ncclCudaHostCalloc(...) ncclCudaHostCallocDebug(__VA_ARGS__, __FILE__, __LINE__)
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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 ncclCallocDebug(T** ptr, size_t nelem, const char *filefunc, int line) {
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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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//INFO(NCCL_ALLOC, "%s:%d malloc Size %ld pointer %p", filefunc, line, nelem*sizeof(T), p);
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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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#define ncclCalloc(...) ncclCallocDebug(__VA_ARGS__, __FILE__, __LINE__)
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template <typename T>
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static ncclResult_t ncclRealloc(T** ptr, size_t oldNelem, size_t nelem) {
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if (nelem < oldNelem) return ncclInternalError;
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if (nelem == oldNelem) return ncclSuccess;
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T* oldp = *ptr;
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T* p = (T*)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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memcpy(p, oldp, oldNelem*sizeof(T));
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free(oldp);
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memset(p+oldNelem, 0, (nelem-oldNelem)*sizeof(T));
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*ptr = (T*)p;
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INFO(NCCL_ALLOC, "Mem Realloc old size %ld, new size %ld pointer %p", oldNelem*sizeof(T), nelem*sizeof(T), *ptr);
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return ncclSuccess;
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}
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struct __attribute__ ((aligned(64))) allocationTracker {
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union {
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struct {
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uint64_t totalAlloc;
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uint64_t totalAllocSize;
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};
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char align[64];
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};
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};
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static_assert(sizeof(struct allocationTracker) == 64, "allocationTracker must be size of 64 bytes");
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#define MAX_ALLOC_TRACK_NGPU 32
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extern struct allocationTracker allocTracker[];
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template <typename T>
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static ncclResult_t ncclCudaCallocDebug(const char *filefunc, int line, T** ptr, size_t nelem, bool isFineGrain = false) {
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#if CUDART_VERSION >= 11030
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// Need async stream for P2P pre-connect + CUDA Graph
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hipStream_t stream;
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CUDACHECK(hipStreamCreateWithFlags(&stream, hipStreamNonBlocking));
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#endif
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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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#if CUDART_VERSION >= 11030
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CUDACHECK(hipMemsetAsync(*ptr, 0, nelem*sizeof(T), stream));
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CUDACHECK(hipStreamSynchronize(stream));
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CUDACHECK(hipStreamDestroy(stream));
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#else
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CUDACHECK(hipMemset(*ptr, 0, nelem*sizeof(T)));
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#endif
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INFO(NCCL_ALLOC, "%s:%d Cuda Alloc Size %ld pointer %p", filefunc, line, nelem*sizeof(T), *ptr);
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int dev;
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CUDACHECK(hipGetDevice(&dev));
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if (dev < MAX_ALLOC_TRACK_NGPU) {
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__atomic_fetch_add(&allocTracker[dev].totalAlloc, 1, __ATOMIC_SEQ_CST);
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__atomic_fetch_add(&allocTracker[dev].totalAllocSize, nelem*sizeof(T), __ATOMIC_SEQ_CST);
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}
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return ncclSuccess;
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}
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#define ncclCudaCalloc(...) ncclCudaCallocDebug(__FILE__, __LINE__, __VA_ARGS__)
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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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// 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 ncclIbMallocDebug(void** ptr, size_t size, const char *filefunc, int line) {
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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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INFO(NCCL_ALLOC, "%s:%d Ib Alloc Size %ld pointer %p", filefunc, line, size, *ptr);
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return ncclSuccess;
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}
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#define ncclIbMalloc(...) ncclIbMallocDebug(__VA_ARGS__, __FILE__, __LINE__)
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#endif
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