Sylvain Jeaugey
108 خطوط
3.8 KiB
Plaintext
108 خطوط
3.8 KiB
Plaintext
/*************************************************************************
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* Copyright (c) 2016-2022, 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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#include "cuda_runtime.h"
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#include "common.h"
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void AlltoAllGetCollByteCount(size_t *sendcount, size_t *recvcount, size_t *paramcount, size_t *sendInplaceOffset, size_t *recvInplaceOffset, size_t count, int nranks) {
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*sendcount = (count/nranks)*nranks;
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*recvcount = (count/nranks)*nranks;
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*sendInplaceOffset = 0;
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*recvInplaceOffset = 0;
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*paramcount = count/nranks;
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}
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testResult_t AlltoAllInitData(struct threadArgs* args, ncclDataType_t type, ncclRedOp_t op, int root, int rep, int in_place) {
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size_t sendcount = args->sendBytes / wordSize(type);
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size_t recvcount = args->expectedBytes / wordSize(type);
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int nranks = args->nProcs*args->nThreads*args->nGpus;
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for (int i=0; i<args->nGpus; i++) {
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CUDACHECK(cudaSetDevice(args->gpus[i]));
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int rank = ((args->proc*args->nThreads + args->thread)*args->nGpus + i);
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CUDACHECK(cudaMemset(args->recvbuffs[i], 0, args->expectedBytes));
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void* data = in_place ? args->recvbuffs[i] : args->sendbuffs[i];
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TESTCHECK(InitData(data, sendcount, 0, type, ncclSum, 33*rep + rank, 1, 0));
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for (int j=0; j<nranks; j++) {
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size_t partcount = sendcount/nranks;
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TESTCHECK(InitData((char*)args->expected[i] + j*partcount*wordSize(type), partcount, rank*partcount, type, ncclSum, 33*rep + j, 1, 0));
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}
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CUDACHECK(cudaDeviceSynchronize());
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}
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// We don't support in-place alltoall
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args->reportErrors = in_place ? 0 : 1;
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return testSuccess;
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}
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void AlltoAllGetBw(size_t count, int typesize, double sec, double* algBw, double* busBw, int nranks) {
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double baseBw = (double)(count * nranks * typesize) / 1.0E9 / sec;
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*algBw = baseBw;
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double factor = ((double)(nranks-1))/((double)(nranks));
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*busBw = baseBw * factor;
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}
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testResult_t AlltoAllRunColl(void* sendbuff, void* recvbuff, size_t count, ncclDataType_t type, ncclRedOp_t op, int root, ncclComm_t comm, cudaStream_t stream) {
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int nRanks;
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NCCLCHECK(ncclCommCount(comm, &nRanks));
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size_t rankOffset = count * wordSize(type);
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#if NCCL_MAJOR < 2 || NCCL_MINOR < 7
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printf("NCCL 2.7 or later is needed for alltoall. This test was compiled with %d.%d.\n", NCCL_MAJOR, NCCL_MINOR);
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return testNcclError;
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#else
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NCCLCHECK(ncclGroupStart());
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for (int r=0; r<nRanks; r++) {
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NCCLCHECK(ncclSend(((char*)sendbuff)+r*rankOffset, count, type, r, comm, stream));
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NCCLCHECK(ncclRecv(((char*)recvbuff)+r*rankOffset, count, type, r, comm, stream));
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}
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NCCLCHECK(ncclGroupEnd());
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return testSuccess;
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#endif
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}
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struct testColl alltoAllTest = {
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"AlltoAll",
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AlltoAllGetCollByteCount,
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AlltoAllInitData,
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AlltoAllGetBw,
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AlltoAllRunColl
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};
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void AlltoAllGetBuffSize(size_t *sendcount, size_t *recvcount, size_t count, int nranks) {
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size_t paramcount, sendInplaceOffset, recvInplaceOffset;
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AlltoAllGetCollByteCount(sendcount, recvcount, ¶mcount, &sendInplaceOffset, &recvInplaceOffset, count, nranks);
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}
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testResult_t AlltoAllRunTest(struct threadArgs* args, int root, ncclDataType_t type, const char* typeName, ncclRedOp_t op, const char* opName) {
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args->collTest = &alltoAllTest;
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ncclDataType_t *run_types;
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const char **run_typenames;
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int type_count;
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if ((int)type != -1) {
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type_count = 1;
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run_types = &type;
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run_typenames = &typeName;
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} else {
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type_count = test_typenum;
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run_types = test_types;
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run_typenames = test_typenames;
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}
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for (int i=0; i<type_count; i++) {
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TESTCHECK(TimeTest(args, run_types[i], run_typenames[i], (ncclRedOp_t)0, "none", -1));
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}
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return testSuccess;
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}
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struct testEngine alltoAllEngine = {
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AlltoAllGetBuffSize,
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AlltoAllRunTest
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};
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#pragma weak ncclTestEngine=alltoAllEngine
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