anirudh2290 commented on a change in pull request #12157: Subgraph API for integrating accelerators with MXNet URL: https://github.com/apache/incubator-mxnet/pull/12157#discussion_r212763653
########## File path: src/operator/subgraph/default_subgraph_property.cc ########## @@ -0,0 +1,76 @@ +/* + * 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. + */ + +#include <vector> +#include <string> +#include "./common.h" +#include "./subgraph_property.h" + +namespace mxnet { +namespace op { + +/* + * This selects nodes for a subgraph that only contains operators + * in a given set and it visits nodes via both input and output links. + */ +class ContainOpSelector: public SubgraphSelector { + public: + explicit ContainOpSelector(const std::unordered_set<std::string>& op_names) + : op_names_(op_names) {} + + virtual bool Select(const nnvm::Node &n) { + return !n.is_variable() && op_names_.count(n.op()->name); + } + + virtual bool SelectInput(const nnvm::Node &n, const nnvm::Node &new_node) { + return !new_node.is_variable() && op_names_.count(new_node.op()->name); + } + + virtual bool SelectOutput(const nnvm::Node &n, const nnvm::Node &new_node) { + return !new_node.is_variable() && op_names_.count(new_node.op()->name); + } + private: + const std::unordered_set<std::string>& op_names_; +}; + +/* + * This subgraph property finds a subgraph whose nodes have only operators + * within a set. The operators in the subgraph will be executed by _default_subgraph_op. + */ +class DefaultSubgraphProperty: public SubgraphProperty { + public: + static SubgraphPropertyPtr Create() { return std::make_shared<DefaultSubgraphProperty>(); } + virtual nnvm::NodePtr CreateSubgraphNode(const nnvm::Symbol &sym, + const int subgraph_id = 0) const { + nnvm::NodePtr n = nnvm::Node::Create(); + n->attrs.op = Op::Get("_default_subgraph_op"); + n->attrs.name = "_default_subgraph_op" + std::to_string(subgraph_id); + n->attrs.subgraphs.push_back(std::make_shared<nnvm::Symbol>(sym)); + return n; + } + virtual SubgraphSelectorPtr CreateSubgraphSelector() const { + return std::make_shared<ContainOpSelector>( + this->GetAttr<std::unordered_set<std::string>>("op_names")); Review comment: for example you only want certain attributes to be set for the subgraph property and you want to do some sanity check on whether the attrs has can be supported or not. For example supported op_names. ---------------------------------------------------------------- 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
