| /* |
| * Copyright (C) 2015 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_JIT_PROFILE_SAVER_H_ |
| #define ART_RUNTIME_JIT_PROFILE_SAVER_H_ |
| |
| #include "base/mutex.h" |
| #include "jit_code_cache.h" |
| #include "offline_profiling_info.h" |
| #include "safe_map.h" |
| |
| namespace art { |
| |
| class ProfileSaver { |
| public: |
| // Starts the profile saver thread if not already started. |
| // If the saver is already running it adds (output_filename, code_paths) to its tracked locations. |
| static void Start(const std::string& output_filename, |
| jit::JitCodeCache* jit_code_cache, |
| const std::vector<std::string>& code_paths, |
| const std::string& foreign_dex_profile_path, |
| const std::string& app_data_dir) |
| REQUIRES(!Locks::profiler_lock_, !wait_lock_); |
| |
| // Stops the profile saver thread. |
| // NO_THREAD_SAFETY_ANALYSIS for static function calling into member function with excludes lock. |
| static void Stop(bool dump_info_) |
| REQUIRES(!Locks::profiler_lock_, !wait_lock_) |
| NO_THREAD_SAFETY_ANALYSIS; |
| |
| // Returns true if the profile saver is started. |
| static bool IsStarted() REQUIRES(!Locks::profiler_lock_); |
| |
| static void NotifyDexUse(const std::string& dex_location); |
| |
| // If the profile saver is running, dumps statistics to the `os`. Otherwise it does nothing. |
| static void DumpInstanceInfo(std::ostream& os); |
| |
| private: |
| ProfileSaver(const std::string& output_filename, |
| jit::JitCodeCache* jit_code_cache, |
| const std::vector<std::string>& code_paths, |
| const std::string& foreign_dex_profile_path, |
| const std::string& app_data_dir); |
| |
| // NO_THREAD_SAFETY_ANALYSIS for static function calling into member function with excludes lock. |
| static void* RunProfileSaverThread(void* arg) |
| REQUIRES(!Locks::profiler_lock_, !wait_lock_) |
| NO_THREAD_SAFETY_ANALYSIS; |
| |
| // The run loop for the saver. |
| void Run() REQUIRES(!Locks::profiler_lock_, !wait_lock_); |
| // Processes the existing profiling info from the jit code cache and returns |
| // true if it needed to be saved to disk. |
| bool ProcessProfilingInfo(); |
| // Returns true if the saver is shutting down (ProfileSaver::Stop() has been called). |
| bool ShuttingDown(Thread* self) REQUIRES(!Locks::profiler_lock_); |
| |
| void AddTrackedLocations(const std::string& output_filename, |
| const std::string& app_data_dir, |
| const std::vector<std::string>& code_paths) |
| REQUIRES(Locks::profiler_lock_); |
| |
| // Retrieves the cached profile compilation info for the given profile file. |
| // If no entry exists, a new empty one will be created, added to the cache and |
| // then returned. |
| ProfileCompilationInfo* GetCachedProfiledInfo(const std::string& filename); |
| // Fetches the current resolved classes from the ClassLinker and stores them |
| // in the profile_cache_ for later save. |
| void FetchAndCacheResolvedClasses(); |
| |
| static bool MaybeRecordDexUseInternal( |
| const std::string& dex_location, |
| const std::set<std::string>& tracked_locations, |
| const std::string& foreign_dex_profile_path, |
| const std::set<std::string>& app_data_dirs); |
| |
| void DumpInfo(std::ostream& os); |
| |
| // The only instance of the saver. |
| static ProfileSaver* instance_ GUARDED_BY(Locks::profiler_lock_); |
| // Profile saver thread. |
| static pthread_t profiler_pthread_ GUARDED_BY(Locks::profiler_lock_); |
| |
| jit::JitCodeCache* jit_code_cache_; |
| |
| // Collection of code paths that the profiles tracks. |
| // It maps profile locations to code paths (dex base locations). |
| SafeMap<std::string, std::set<std::string>> tracked_dex_base_locations_ |
| GUARDED_BY(Locks::profiler_lock_); |
| // The directory were the we should store the code paths. |
| std::string foreign_dex_profile_path_; |
| |
| // A list of application directories, used to infer if a loaded dex belongs |
| // to the application or not. Multiple application data directories are possible when |
| // different apps share the same runtime. |
| std::set<std::string> app_data_dirs_ GUARDED_BY(Locks::profiler_lock_); |
| |
| bool shutting_down_ GUARDED_BY(Locks::profiler_lock_); |
| uint32_t last_save_number_of_methods_; |
| uint32_t last_save_number_of_classes_; |
| |
| // A local cache for the profile information. Maps each tracked file to its |
| // profile information. The size of this cache is usually very small and tops |
| // to just a few hundreds entries in the ProfileCompilationInfo objects. |
| // It helps avoiding unnecessary writes to disk. |
| SafeMap<std::string, ProfileCompilationInfo> profile_cache_; |
| |
| // Save period condition support. |
| Mutex wait_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; |
| ConditionVariable period_condition_ GUARDED_BY(wait_lock_); |
| |
| uint64_t total_bytes_written_; |
| uint64_t total_number_of_writes_; |
| uint64_t total_number_of_code_cache_queries_; |
| uint64_t total_number_of_skipped_writes_; |
| uint64_t total_number_of_failed_writes_; |
| uint64_t total_ms_of_sleep_; |
| uint64_t total_ns_of_work_; |
| uint64_t total_number_of_foreign_dex_marks_; |
| // TODO(calin): replace with an actual size. |
| uint64_t max_number_of_profile_entries_cached_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ProfileSaver); |
| }; |
| |
| } // namespace art |
| |
| #endif // ART_RUNTIME_JIT_PROFILE_SAVER_H_ |