| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_METRICS_PERF_PROVIDER_CHROMEOS_H_ |
| #define CHROME_BROWSER_METRICS_PERF_PROVIDER_CHROMEOS_H_ |
| |
| #include <string> |
| #include <vector> |
| |
| #include "base/basictypes.h" |
| #include "base/threading/non_thread_safe.h" |
| #include "base/time/time.h" |
| #include "base/timer/timer.h" |
| #include "chromeos/dbus/power_manager_client.h" |
| #include "chromeos/login/login_state.h" |
| #include "components/metrics/proto/sampled_profile.pb.h" |
| |
| namespace metrics { |
| |
| class WindowedIncognitoObserver; |
| |
| // Provides access to ChromeOS perf data. perf aka "perf events" is a |
| // performance profiling infrastructure built into the linux kernel. For more |
| // information, see: https://perf.wiki.kernel.org/index.php/Main_Page. |
| class PerfProvider : public base::NonThreadSafe, |
| public chromeos::PowerManagerClient::Observer { |
| public: |
| PerfProvider(); |
| virtual ~PerfProvider(); |
| |
| // Stores collected perf data protobufs in |sampled_profiles|. Clears all the |
| // stored profile data. Returns true if it wrote to |sampled_profiles|. |
| bool GetSampledProfiles(std::vector<SampledProfile>* sampled_profiles); |
| |
| private: |
| // Class that listens for changes to the login state. When a normal user logs |
| // in, it updates PerfProvider to start collecting data. |
| class LoginObserver : public chromeos::LoginState::Observer { |
| public: |
| explicit LoginObserver(PerfProvider* perf_provider); |
| |
| // Called when either the login state or the logged in user type changes. |
| // Activates |perf_provider_| to start collecting. |
| virtual void LoggedInStateChanged() OVERRIDE; |
| |
| private: |
| // Points to a PerfProvider instance that can be turned on or off based on |
| // the login state. |
| PerfProvider* perf_provider_; |
| }; |
| |
| // Called when a suspend finishes. This is either a successful suspend |
| // followed by a resume, or a suspend that was canceled. Inherited from |
| // PowerManagerClient::Observer. |
| virtual void SuspendDone(const base::TimeDelta& sleep_duration) OVERRIDE; |
| |
| // Turns on perf collection. Resets the timer that's used to schedule |
| // collections. |
| void OnUserLoggedIn(); |
| |
| // Turns off perf collection. Does not delete any data that was already |
| // collected and stored in |cached_perf_data_|. |
| void Deactivate(); |
| |
| // Selects a random time in the upcoming profiling interval that begins at |
| // |next_profiling_interval_start_|. Schedules |timer_| to invoke |
| // DoPeriodicCollection() when that time comes. |
| void ScheduleCollection(); |
| |
| // Collects perf data for a given |trigger_event|. Calls perf via the ChromeOS |
| // debug daemon's dbus interface. |
| void CollectIfNecessary(scoped_ptr<SampledProfile> sampled_profile); |
| |
| // Collects perf data on a repeating basis by calling CollectIfNecessary() and |
| // reschedules it to be collected again. |
| void DoPeriodicCollection(); |
| |
| // Parses a perf data protobuf from the |data| passed in only if the |
| // |incognito_observer| indicates that no incognito window had been opened |
| // during the profile collection period. |
| // |trigger_event| is the cause of the perf data collection. |
| void ParseProtoIfValid( |
| scoped_ptr<WindowedIncognitoObserver> incognito_observer, |
| scoped_ptr<SampledProfile> sampled_profile, |
| const std::vector<uint8>& data); |
| |
| // Vector of SampledProfile protobufs containing perf profiles. |
| std::vector<SampledProfile> cached_perf_data_; |
| |
| // For scheduling collection of perf data. |
| base::OneShotTimer<PerfProvider> timer_; |
| |
| // For detecting when changes to the login state. |
| LoginObserver login_observer_; |
| |
| // Record of the last login time. |
| base::TimeTicks login_time_; |
| |
| // Record of the start of the upcoming profiling interval. |
| base::TimeTicks next_profiling_interval_start_; |
| |
| // To pass around the "this" pointer across threads safely. |
| base::WeakPtrFactory<PerfProvider> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PerfProvider); |
| }; |
| |
| } // namespace metrics |
| |
| #endif // CHROME_BROWSER_METRICS_PERF_PROVIDER_CHROMEOS_H_ |