components/metrics/drive_metrics_provider.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/metrics/drive_metrics_provider.h"
   6
   7 #include "base/base_paths.h"
   8 #include "base/bind.h"
   9 #include "base/files/file_path.h"
  10 #include "base/location.h"
  11 #include "base/logging.h"
  12 #include "base/metrics/histogram_macros.h"
  13 #include "base/path_service.h"
  14 #include "base/task_runner_util.h"
  15 #include "base/time/time.h"
  16
  17 namespace metrics {
  18
  19 DriveMetricsProvider::DriveMetricsProvider(
  20     scoped_refptr<base::SequencedTaskRunner> file_thread,
  21     int local_state_path_key)
  22     : file_thread_(file_thread),
  23       local_state_path_key_(local_state_path_key),
  24       weak_ptr_factory_(this) {}
  25
  26 DriveMetricsProvider::~DriveMetricsProvider() {}
  27
  28 void DriveMetricsProvider::ProvideSystemProfileMetrics(
  29     metrics::SystemProfileProto* system_profile_proto) {
  30   auto* hardware = system_profile_proto->mutable_hardware();
  31   FillDriveMetrics(metrics_.app_drive, hardware->mutable_app_drive());
  32   FillDriveMetrics(metrics_.user_data_drive,
  33                    hardware->mutable_user_data_drive());
  34 }
  35
  36 void DriveMetricsProvider::GetDriveMetrics(const base::Closure& done) {
  37   got_metrics_callback_ = done;
  38
  39   base::PostTaskAndReplyWithResult(
  40       file_thread_.get(), FROM_HERE,
  41       base::Bind(&DriveMetricsProvider::GetDriveMetricsOnFileThread,
  42                  local_state_path_key_),
  43       base::Bind(&DriveMetricsProvider::GotDriveMetrics,
  44                  weak_ptr_factory_.GetWeakPtr()));
  45 }
  46
  47 DriveMetricsProvider::SeekPenaltyResponse::SeekPenaltyResponse()
  48     : success(false) {}
  49
  50 // static
  51 DriveMetricsProvider::DriveMetrics
  52 DriveMetricsProvider::GetDriveMetricsOnFileThread(int local_state_path_key) {
  53   DriveMetricsProvider::DriveMetrics metrics;
  54   QuerySeekPenalty(base::FILE_EXE, &metrics.app_drive);
  55   QuerySeekPenalty(local_state_path_key, &metrics.user_data_drive);
  56   return metrics;
  57 }
  58
  59 // static
  60 void DriveMetricsProvider::QuerySeekPenalty(
  61     int path_service_key,
  62     DriveMetricsProvider::SeekPenaltyResponse* response) {
  63   DCHECK(response);
  64
  65   base::FilePath path;
  66   if (!PathService::Get(path_service_key, &path))
  67     return;
  68
  69   base::TimeTicks start = base::TimeTicks::Now();
  70
  71   response->success = HasSeekPenalty(path, &response->has_seek_penalty);
  72
  73   UMA_HISTOGRAM_TIMES("Hardware.Drive.HasSeekPenalty_Time",
  74                       base::TimeTicks::Now() - start);
  75   UMA_HISTOGRAM_BOOLEAN("Hardware.Drive.HasSeekPenalty_Success",
  76                         response->success);
  77   if (response->success) {
  78     UMA_HISTOGRAM_BOOLEAN("Hardware.Drive.HasSeekPenalty",
  79                           response->has_seek_penalty);
  80   }
  81 }
  82
  83 void DriveMetricsProvider::GotDriveMetrics(
  84     const DriveMetricsProvider::DriveMetrics& metrics) {
  85   DCHECK(thread_checker_.CalledOnValidThread());
  86   metrics_ = metrics;
  87   got_metrics_callback_.Run();
  88 }
  89
  90 void DriveMetricsProvider::FillDriveMetrics(
  91     const DriveMetricsProvider::SeekPenaltyResponse& response,
  92     metrics::SystemProfileProto::Hardware::Drive* drive) {
  93   if (response.success)
  94     drive->set_has_seek_penalty(response.has_seek_penalty);
  95 }
  96
  97 }  // namespace metrics