| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed 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. |
| */ |
| |
| #ifndef ART_RUNTIME_BASE_TIMING_LOGGER_H_ |
| #define ART_RUNTIME_BASE_TIMING_LOGGER_H_ |
| |
| #include "base/histogram.h" |
| #include "base/macros.h" |
| #include "base/mutex.h" |
| |
| #include <string> |
| #include <vector> |
| |
| namespace art { |
| |
| namespace base { |
| class TimingLogger; |
| } // namespace base |
| |
| class CumulativeLogger { |
| public: |
| explicit CumulativeLogger(const std::string& name); |
| void prepare_stats(); |
| ~CumulativeLogger(); |
| void Start(); |
| void End(); |
| void Reset(); |
| void Dump(std::ostream& os) LOCKS_EXCLUDED(lock_); |
| uint64_t GetTotalNs() const; |
| // Allow the name to be modified, particularly when the cumulative logger is a field within a |
| // parent class that is unable to determine the "name" of a sub-class. |
| void SetName(const std::string& name); |
| void AddLogger(const base::TimingLogger& logger) LOCKS_EXCLUDED(lock_); |
| |
| private: |
| void AddPair(const std::string &label, uint64_t delta_time) |
| EXCLUSIVE_LOCKS_REQUIRED(lock_); |
| void DumpHistogram(std::ostream &os) EXCLUSIVE_LOCKS_REQUIRED(lock_); |
| uint64_t GetTotalTime() const; |
| static const uint64_t kAdjust = 1000; |
| std::vector<Histogram<uint64_t> *> histograms_ GUARDED_BY(lock_); |
| std::string name_; |
| const std::string lock_name_; |
| mutable Mutex lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; |
| size_t index_ GUARDED_BY(lock_); |
| size_t iterations_ GUARDED_BY(lock_); |
| |
| DISALLOW_COPY_AND_ASSIGN(CumulativeLogger); |
| }; |
| |
| namespace base { |
| |
| // A replacement to timing logger that know when a split starts for the purposes of logging. |
| class TimingLogger { |
| public: |
| explicit TimingLogger(const char* name, bool precise, bool verbose); |
| |
| // Clears current splits and labels. |
| void Reset(); |
| |
| // Starts a split, a split shouldn't be in progress. |
| void StartSplit(const char* new_split_label); |
| |
| // Ends the current split and starts the one given by the label. |
| void NewSplit(const char* new_split_label); |
| |
| // Ends the current split and records the end time. |
| void EndSplit(); |
| |
| uint64_t GetTotalNs() const; |
| |
| void Dump(std::ostream& os) const; |
| |
| const std::vector<std::pair<uint64_t, const char*> >& GetSplits() const { |
| return splits_; |
| } |
| |
| protected: |
| // The name of the timing logger. |
| const char* name_; |
| |
| // Do we want to print the exactly recorded split (true) or round down to the time unit being |
| // used (false). |
| const bool precise_; |
| |
| // Verbose logging. |
| const bool verbose_; |
| |
| // The name of the current split. |
| const char* current_split_; |
| |
| // The nanosecond time the current split started on. |
| uint64_t current_split_start_ns_; |
| |
| // Splits are nanosecond times and split names. |
| std::vector<std::pair<uint64_t, const char*> > splits_; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(TimingLogger); |
| }; |
| |
| } // namespace base |
| } // namespace art |
| |
| #endif // ART_RUNTIME_BASE_TIMING_LOGGER_H_ |