| // Copyright 2015 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_DRIVE_METRICS_PROVIDER_H_ |
| #define CHROME_BROWSER_METRICS_DRIVE_METRICS_PROVIDER_H_ |
| |
| #include "base/callback.h" |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/threading/thread_checker.h" |
| #include "components/metrics/metrics_provider.h" |
| #include "components/metrics/proto/system_profile.pb.h" |
| |
| // Provides metrics about the local drives on a user's computer. Currently only |
| // checks to see if they incur a seek-time penalty (e.g. if they're SSDs). |
| // |
| // Defers gathering metrics until after "rush hour" (startup) so as to not bog |
| // down the FILE thread. |
| class DriveMetricsProvider : public metrics::MetricsProvider { |
| public: |
| DriveMetricsProvider(); |
| ~DriveMetricsProvider() override; |
| |
| // metrics::MetricsDataProvider: |
| void ProvideSystemProfileMetrics( |
| metrics::SystemProfileProto* system_profile_proto) override; |
| |
| // Called by ChromeMetricsServiceClient to start gathering metrics. |
| void GetDriveMetrics(const base::Closure& done); |
| |
| private: |
| // A response to querying a drive as to whether it incurs a seek penalty. |
| // |has_seek_penalty| is set if |success| is true. |
| struct SeekPenaltyResponse { |
| SeekPenaltyResponse(); |
| bool success; |
| bool has_seek_penalty; |
| }; |
| |
| struct DriveMetrics { |
| SeekPenaltyResponse app_drive; |
| SeekPenaltyResponse user_data_drive; |
| }; |
| |
| // Gather metrics about various drives on the FILE thread. |
| static DriveMetrics GetDriveMetricsOnFileThread(); |
| |
| // Tries to determine whether there is a penalty for seeking on the drive that |
| // hosts |path_service_key| (for example: the drive that holds "Local State"). |
| static void QuerySeekPenalty(int path_service_key, |
| SeekPenaltyResponse* response); |
| |
| // Called when metrics are done being gathered from the FILE thread. |
| void GotDriveMetrics(const DriveMetrics& metrics); |
| |
| // Fills |drive| with information from successful |response|s. |
| void FillDriveMetrics( |
| const SeekPenaltyResponse& response, |
| metrics::SystemProfileProto::Hardware::Drive* drive); |
| |
| // Information gathered about various important drives. |
| DriveMetrics metrics_; |
| |
| // Called when metrics are done being collected. |
| base::Closure got_metrics_callback_; |
| |
| base::ThreadChecker thread_checker_; |
| base::WeakPtrFactory<DriveMetricsProvider> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DriveMetricsProvider); |
| }; |
| |
| #endif // CHROME_BROWSER_METRICS_DRIVE_METRICS_PROVIDER_H_ |