1 // Copyright 2007-2008 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
4 // met:
5 //
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28 #include "v8.h"
29
30 #include "counters.h"
31 #include "isolate.h"
32 #include "platform.h"
33
34 namespace v8 {
35 namespace internal {
36
StatsTable()37 StatsTable::StatsTable()
38 : lookup_function_(NULL),
39 create_histogram_function_(NULL),
40 add_histogram_sample_function_(NULL) {}
41
42
FindLocationInStatsTable() const43 int* StatsCounter::FindLocationInStatsTable() const {
44 return Isolate::Current()->stats_table()->FindLocation(name_);
45 }
46
47
48 // Start the timer.
Start()49 void StatsCounterTimer::Start() {
50 if (!counter_.Enabled())
51 return;
52 stop_time_ = 0;
53 start_time_ = OS::Ticks();
54 }
55
56 // Stop the timer and record the results.
Stop()57 void StatsCounterTimer::Stop() {
58 if (!counter_.Enabled())
59 return;
60 stop_time_ = OS::Ticks();
61
62 // Compute the delta between start and stop, in milliseconds.
63 int milliseconds = static_cast<int>(stop_time_ - start_time_) / 1000;
64 counter_.Increment(milliseconds);
65 }
66
67 // Start the timer.
Start()68 void HistogramTimer::Start() {
69 if (GetHistogram() != NULL) {
70 stop_time_ = 0;
71 start_time_ = OS::Ticks();
72 }
73 }
74
75 // Stop the timer and record the results.
Stop()76 void HistogramTimer::Stop() {
77 if (histogram_ != NULL) {
78 stop_time_ = OS::Ticks();
79
80 // Compute the delta between start and stop, in milliseconds.
81 int milliseconds = static_cast<int>(stop_time_ - start_time_) / 1000;
82 Isolate::Current()->stats_table()->
83 AddHistogramSample(histogram_, milliseconds);
84 }
85 }
86
87
CreateHistogram() const88 void* HistogramTimer::CreateHistogram() const {
89 return Isolate::Current()->stats_table()->
90 CreateHistogram(name_, 0, 10000, 50);
91 }
92
93 } } // namespace v8::internal
94