1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*
* Copyright (C) 2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <wtf/TimingScope.h>
#include <wtf/HashMap.h>
#include <wtf/Lock.h>
namespace WTF {
namespace {
class State {
WTF_MAKE_NONCOPYABLE(State);
WTF_MAKE_FAST_ALLOCATED;
public:
struct CallData {
Seconds totalDuration;
unsigned callCount { 0 };
Seconds maxDuration;
Seconds meanDuration() const { return totalDuration / callCount; }
};
State() = default;
const CallData& addToTotal(const char* name, Seconds duration)
{
Locker locker { lock };
auto& result = totals.add(name, CallData()).iterator->value;
++result.callCount;
result.maxDuration = std::max(result.maxDuration, duration);
result.totalDuration += duration;
return result;
}
private:
HashMap<const char*, CallData> totals WTF_GUARDED_BY_LOCK(lock);
Lock lock;
};
State& state()
{
static Atomic<State*> s_state;
return ensurePointer(s_state, [] { return new State(); });
}
} // anonymous namespace
void TimingScope::scopeDidEnd()
{
const auto& data = state().addToTotal(m_name, MonotonicTime::now() - m_startTime);
if (!(data.callCount % m_logIterationInterval))
WTFLogAlways("%s: %u calls, mean duration: %.6fms, total duration: %.6fms, max duration %.6fms", m_name.characters(), data.callCount, data.meanDuration().milliseconds(), data.totalDuration.milliseconds(), data.maxDuration.milliseconds());
}
} // namespace WebCore
|
