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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "ash/metrics/task_switch_time_tracker.h" | 5 #include "ash/metrics/task_switch_time_tracker.h" |
6 | 6 |
7 #include "base/metrics/histogram.h" | 7 #include "base/metrics/histogram.h" |
8 #include "base/time/default_tick_clock.h" | 8 #include "base/time/default_tick_clock.h" |
9 | 9 |
10 namespace ash { | 10 namespace ash { |
11 | 11 |
12 namespace { | 12 namespace { |
13 | 13 |
14 // The number of buckets in the histogram. | 14 // The number of buckets in the histogram. |
15 // See IMPORTANT note below if you want to change this value! | 15 // See IMPORTANT note below if you want to change this value! |
16 const size_t kBucketCount = 50; | 16 const size_t kBucketCount = 50; |
17 | 17 |
18 // The underflow (aka minimum) bucket size for the histogram. | 18 // The underflow (aka minimum) bucket size for the histogram. |
19 // See IMPORTANT note below if you want to change this value! | 19 // See IMPORTANT note below if you want to change this value! |
20 const int kMinBucketSizeInSeconds = 0; | 20 const int kMinBucketSizeInSeconds = 0; |
21 | 21 |
22 // The overflow (aka maximium) bucket size for the histogram. | 22 // The overflow (aka maximium) bucket size for the histogram. |
23 // See IMPORTANT note below if you want to change this value! | 23 // See IMPORTANT note below if you want to change this value! |
24 const int kMaxBucketSizeInSeconds = 60 * 60; | 24 const int kMaxBucketSizeInSeconds = 60 * 60; |
25 | 25 |
26 } // namespace | 26 } // namespace |
27 | 27 |
28 TaskSwitchTimeTracker::TaskSwitchTimeTracker(const std::string& histogram_name) | 28 TaskSwitchTimeTracker::TaskSwitchTimeTracker(const std::string& histogram_name) |
29 : histogram_name_(histogram_name), | 29 : histogram_name_(histogram_name), |
30 tick_clock_(new base::DefaultTickClock()) { | 30 tick_clock_(new base::DefaultTickClock()) {} |
31 } | |
32 | 31 |
33 TaskSwitchTimeTracker::TaskSwitchTimeTracker( | 32 TaskSwitchTimeTracker::TaskSwitchTimeTracker( |
34 const std::string& histogram_name, | 33 const std::string& histogram_name, |
35 std::unique_ptr<base::TickClock> tick_clock) | 34 std::unique_ptr<base::TickClock> tick_clock) |
36 : histogram_name_(histogram_name), tick_clock_(tick_clock.release()) {} | 35 : histogram_name_(histogram_name), tick_clock_(tick_clock.release()) {} |
37 | 36 |
38 TaskSwitchTimeTracker::~TaskSwitchTimeTracker() { | 37 TaskSwitchTimeTracker::~TaskSwitchTimeTracker() {} |
39 } | |
40 | 38 |
41 void TaskSwitchTimeTracker::OnTaskSwitch() { | 39 void TaskSwitchTimeTracker::OnTaskSwitch() { |
42 if (!HasLastActionTime()) | 40 if (!HasLastActionTime()) |
43 SetLastActionTime(); | 41 SetLastActionTime(); |
44 else | 42 else |
45 RecordTimeDelta(); | 43 RecordTimeDelta(); |
46 } | 44 } |
47 | 45 |
48 bool TaskSwitchTimeTracker::HasLastActionTime() const { | 46 bool TaskSwitchTimeTracker::HasLastActionTime() const { |
49 return last_action_time_ != base::TimeTicks(); | 47 return last_action_time_ != base::TimeTicks(); |
(...skipping 27 matching lines...) Expand all Loading... |
77 } | 75 } |
78 | 76 |
79 #if DCHECK_IS_ON() | 77 #if DCHECK_IS_ON() |
80 histogram_->CheckName(histogram_name_); | 78 histogram_->CheckName(histogram_name_); |
81 #endif // DCHECK_IS_ON() | 79 #endif // DCHECK_IS_ON() |
82 | 80 |
83 return histogram_; | 81 return histogram_; |
84 } | 82 } |
85 | 83 |
86 } // namespace ash | 84 } // namespace ash |
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