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Side by Side Diff: cc/debug/lap_timer.h

Issue 279183002: Use LapTimer in rasterize_and_record micro benchmark. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Add CC_EXPORT to LapTimer class. Created 6 years, 7 months ago
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1 // Copyright 2013 The Chromium Authors. All rights reserved. 1 // Copyright 2013 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 #ifndef CC_TEST_LAP_TIMER_H_ 5 #ifndef CC_DEBUG_LAP_TIMER_H_
6 #define CC_TEST_LAP_TIMER_H_ 6 #define CC_DEBUG_LAP_TIMER_H_
7 7
8 #include "base/time/time.h" 8 #include "base/time/time.h"
9 #include "cc/base/cc_export.h"
9 10
10 namespace cc { 11 namespace cc {
11 12
12 // LapTimer is used to calculate average times per "Lap" in perf tests. 13 // LapTimer is used to calculate average times per "Lap" in perf tests.
13 // Current() reports the time since the last call to Start(). 14 // Current() reports the time since the last call to Start().
14 // Store() adds the time since the last call to Start() to the accumulator, and 15 // Store() adds the time since the last call to Start() to the accumulator, and
15 // resets the start time to now. Stored() returns the accumulated time. 16 // resets the start time to now. Stored() returns the accumulated time.
16 // NextLap increments the lap counter, used in counting the per lap averages. 17 // NextLap increments the lap counter, used in counting the per lap averages.
17 // If you initialize the LapTimer with a non zero warmup_laps, it will ignore 18 // If you initialize the LapTimer with a non zero warmup_laps, it will ignore
18 // the times for that many laps at the start. 19 // the times for that many laps at the start.
19 // If you set the time_limit then you can use HasTimeLimitExpired() to see if 20 // If you set the time_limit then you can use HasTimeLimitExpired() to see if
20 // the current accumulated time has crossed that threshold, with an optimization 21 // the current accumulated time has crossed that threshold, with an optimization
21 // that it only tests this every check_interval laps. 22 // that it only tests this every check_interval laps.
22 class LapTimer { 23 class CC_EXPORT LapTimer {
23 public: 24 public:
24 LapTimer(int warmup_laps, base::TimeDelta time_limit, int check_interval); 25 LapTimer(int warmup_laps, base::TimeDelta time_limit, int check_interval);
25 // Resets the timer back to it's starting state. 26 // Resets the timer back to it's starting state.
26 void Reset(); 27 void Reset();
27 // Sets the start point to now. 28 // Sets the start point to now.
28 void Start(); 29 void Start();
29 // Returns true if there are no more warmup laps to do. 30 // Returns true if there are no more warmup laps to do.
30 bool IsWarmedUp(); 31 bool IsWarmedUp();
31 // Advance the lap counter and update the accumulated time. 32 // Advance the lap counter and update the accumulated time.
32 // The accumulated time is only updated every check_interval laps. 33 // The accumulated time is only updated every check_interval laps.
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53 int remaining_warmups_; 54 int remaining_warmups_;
54 int remaining_no_check_laps_; 55 int remaining_no_check_laps_;
55 base::TimeDelta time_limit_; 56 base::TimeDelta time_limit_;
56 int check_interval_; 57 int check_interval_;
57 58
58 DISALLOW_COPY_AND_ASSIGN(LapTimer); 59 DISALLOW_COPY_AND_ASSIGN(LapTimer);
59 }; 60 };
60 61
61 } // namespace cc 62 } // namespace cc
62 63
63 #endif // CC_TEST_LAP_TIMER_H_ 64 #endif // CC_DEBUG_LAP_TIMER_H_
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