threeleafzerg commented on a change in pull request #10696: [MXNET-366]Extend MXNet Distributed Training by MPI AllReduce URL: https://github.com/apache/incubator-mxnet/pull/10696#discussion_r187769045
########## File path: src/mpi_collectives/src/mpi_collectives.cc ########## @@ -0,0 +1,814 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +/** + * Copyright (c) 2018 by Contributors + */ + +#if MXNET_USE_MPI_DIST_KVSTORE + +#include <mpi.h> +#include <unordered_map> +#include <queue> +#include <thread> +#include <functional> +#include <mutex> +#include <condition_variable> +#include <atomic> +#include <iostream> + +#include "mxnet/base.h" +#include "mxnet/ndarray.h" +#include "mxnet/engine.h" +#include "dmlc/logging.h" +#include "mpi_message.pb.h" +#include "mpi_collectives.h" +#include "mpi_wrapper.h" +#include "mpi_util.h" + +using namespace mxnet::kvstore; + +const char INT_PREFIX[] = "INT:"; +const char STR_PREFIX[] = "STR:"; + +namespace { + +struct CollectiveOpRecord { + int rank; + + std::string key; + + MPIDataType dtype; + + mxnet::NDArray *val_in; + + mxnet::NDArray *val_out; + + int root_rank; + + mxnet::engine::CallbackOnComplete callback; +}; + +typedef std::unordered_map<std::string, CollectiveOpRecord> NDArrayTable; + +typedef std::unordered_map<std::string, std::vector<MPIRequest> > MessageTable; + +struct MPIGlobalState { + std::atomic_flag initialized_flag = ATOMIC_FLAG_INIT; Review comment: I will add it in next commit. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services
