Wenkai Du
41 lines
1.7 KiB
C++
41 lines
1.7 KiB
C++
/*************************************************************************
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* Copyright (c) 2015-2020, NVIDIA CORPORATION. All rights reserved.
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* Modifications Copyright (c) Microsoft Corporation. Licensed under the MIT License.
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*
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* See LICENSE.txt for license information
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************************************************************************/
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#include "enqueue.h"
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#include "collectives.h"
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#include "nccl.h"
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#include "msccl/msccl_lifecycle.h"
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NCCL_API(ncclResult_t, ncclReduceScatter, const void* sendbuff, void* recvbuff, size_t recvcount,
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ncclDataType_t datatype, ncclRedOp_t op, ncclComm* comm, cudaStream_t stream);
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ncclResult_t ncclReduceScatter(const void* sendbuff, void* recvbuff, size_t recvcount,
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ncclDataType_t datatype, ncclRedOp_t op, ncclComm* comm, cudaStream_t stream) {
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struct NvtxParamsReduceScatter {
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size_t bytes;
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ncclRedOp_t op;
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};
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constexpr nvtxPayloadSchemaEntry_t ReduceScatterSchema[] = {
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{0, NVTX_PAYLOAD_ENTRY_TYPE_SIZE, "Message size [bytes]"},
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{0, NVTX_PAYLOAD_ENTRY_NCCL_REDOP, "Reduction operation", nullptr, 0,
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offsetof(NvtxParamsReduceScatter, op)}
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};
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NvtxParamsReduceScatter payload{recvcount * ncclTypeSize(datatype), op};
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NVTX3_FUNC_WITH_PARAMS(ReduceScatter, ReduceScatterSchema, payload)
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if (mscclAvailable() && !mscclIsCaller()) {
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return mscclEnqueueCheck(
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sendbuff, nullptr, nullptr, recvbuff, nullptr, nullptr,
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recvcount, datatype, 0, 0, op, mscclFuncReduceScatter, comm, stream);
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}
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struct ncclInfo info = { ncclFuncReduceScatter, "ReduceScatter",
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sendbuff, recvbuff, recvcount, datatype, op, 0, comm, stream, /* Args */
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REDUCESCATTER_CHUNKSTEPS, REDUCESCATTER_SLICESTEPS };
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return ncclEnqueueCheck(&info);
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}
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