2d34e76dac
Add a tracing API and instrument key functions in order to profile aapt2 bottleneck. The API allows to generate systrace fragment files. Impact on performance is neglibible with each Trace requiring less than 1us and the final Flush operation at the end of a command requiring around 40us. Bug: None Test: None Change-Id: I51b564d3694e9384679f43b878b32295527dddf6
65 lines
2.1 KiB
C++
65 lines
2.1 KiB
C++
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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*/
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#ifndef AAPT_TRACEBUFFER_H
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#define AAPT_TRACEBUFFER_H
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#include <string>
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#include <vector>
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#include <androidfw/StringPiece.h>
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namespace aapt {
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// Record timestamps for beginning and end of a task and generate systrace json fragments.
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// This is an in-process ftrace which has the advantage of being platform independent.
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// These methods are NOT thread-safe since aapt2 is not multi-threaded.
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// Convenience RIAA object to automatically finish an event when object goes out of scope.
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class Trace {
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public:
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Trace(const std::string& tag);
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Trace(const std::string& tag, const std::vector<android::StringPiece>& args);
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~Trace();
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};
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// Manual markers.
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void BeginTrace(const std::string& tag);
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void EndTrace();
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// A master trace is required to flush events to disk. Events are formatted in systrace
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// json format.
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class FlushTrace {
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public:
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explicit FlushTrace(const std::string& basepath, const std::string& tag);
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explicit FlushTrace(const std::string& basepath, const std::string& tag,
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const std::vector<android::StringPiece>& args);
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explicit FlushTrace(const std::string& basepath, const std::string& tag,
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const std::vector<std::string>& args);
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~FlushTrace();
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private:
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std::string basepath_;
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};
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#define TRACE_CALL() Trace __t(__func__)
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#define TRACE_NAME(tag) Trace __t(tag)
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#define TRACE_NAME_ARGS(tag, args) Trace __t(tag, args)
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#define TRACE_FLUSH(basename, tag) FlushTrace __t(basename, tag)
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#define TRACE_FLUSH_ARGS(basename, tag, args) FlushTrace __t(basename, tag, args)
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} // namespace aapt
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#endif //AAPT_TRACEBUFFER_H
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