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88 lines
3.0 KiB
88 lines
3.0 KiB
/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. */
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#include "paddle/fluid/framework/feed_fetch_type.h"
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#include "paddle/fluid/framework/op_registry.h"
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#include "paddle/fluid/platform/device_context.h"
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namespace paddle {
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namespace operators {
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class FetchOp : public framework::OperatorBase {
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public:
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FetchOp(const std::string &type, const framework::VariableNameMap &inputs,
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const framework::VariableNameMap &outputs,
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const framework::AttributeMap &attrs)
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: OperatorBase(type, inputs, outputs, attrs) {}
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private:
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void RunImpl(const framework::Scope &scope,
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const platform::Place &place) const override {
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auto fetch_var_name = Input("X");
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auto *fetch_var = scope.FindVar(fetch_var_name);
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PADDLE_ENFORCE(fetch_var != nullptr,
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"Cannot find fetch variable in scope, fetch_var_name is %s",
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fetch_var_name);
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auto out_name = this->Output("Out");
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auto *out_var = scope.FindVar(out_name);
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PADDLE_ENFORCE(out_var != nullptr,
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"Cannot find out_var in scope, out_var_name is %s",
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out_name);
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auto col = static_cast<size_t>(Attr<int>("col"));
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auto *fetch_list = out_var->GetMutable<framework::FeedFetchList>();
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auto &src_item = fetch_var->Get<framework::FeedFetchType>();
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if (col >= fetch_list->size()) {
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fetch_list->resize(col + 1);
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}
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auto &dst_item = fetch_list->at(col);
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// FIXME(yuyang18): Should we assume the fetch operator always generate
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// CPU outputs?
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platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
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auto &dev_ctx = *pool.Get(src_item.place());
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TensorCopy(src_item, platform::CPUPlace(), dev_ctx, &dst_item);
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dev_ctx.Wait();
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dst_item.set_lod(src_item.lod());
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VLOG(3) << "Fetch variable " << fetch_var_name << " to " << out_name;
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}
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};
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class FetchOpInfoMaker : public framework::OpProtoAndCheckerMaker {
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public:
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FetchOpInfoMaker(OpProto *proto, OpAttrChecker *op_checker)
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: OpProtoAndCheckerMaker(proto, op_checker) {
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AddInput("X", "The input of fetch op");
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AddOutput("Out", "The output of fetch op");
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AddAttr<int>("col", "(int) The column of fetch");
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AddComment(R"DOC(
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Fetch Operator.
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It should not be configured by users directly.
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)DOC");
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}
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};
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} // namespace operators
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} // namespace paddle
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REGISTER_OPERATOR(fetch, paddle::operators::FetchOp,
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paddle::framework::EmptyGradOpMaker,
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paddle::operators::FetchOpInfoMaker);
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