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allreduce mean

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lucasdelimanogueira 2024-05-25 08:52:20 -03:00
parent 7a3b0f276b
commit 5283c1bc06
2 changed files with 20 additions and 0 deletions
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13
norch/csrc/distributed.cpp
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@ -56,6 +56,19 @@ void allreduce_sum_tensor(Tensor* tensor) {
cudaStreamDestroy(stream);
}
void allreduce_mean_tensor(Tensor* tensor) {
cudaStream_t stream;
cudaStreamCreate(&stream);
// Perform NCCL AllReduce operation to calculate the mean of all tensors across all processes
NCCL_CHECK(ncclAllReduce(tensor->data, tensor->data, tensor->size, ncclFloat, ncclSum, nccl_comm, stream));
tensor_div_scalar(tensor, tensor->data);
cudaStreamSynchronize(stream);
cudaStreamDestroy(stream);
}
void end_process_group() {
MPI_CHECK(MPI_Finalize());
NCCL_CHECK(ncclCommDestroy(nccl_comm));