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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 "net/disk_cache/stats_histogram.h" | 5 #include "net/disk_cache/stats_histogram.h" |
6 | 6 |
7 #include "base/debug/leak_annotations.h" | 7 #include "base/debug/leak_annotations.h" |
8 #include "base/logging.h" | 8 #include "base/logging.h" |
9 #include "base/metrics/bucket_ranges.h" | 9 #include "base/metrics/bucket_ranges.h" |
10 #include "base/metrics/histogram_base.h" | 10 #include "base/metrics/histogram_base.h" |
11 #include "base/metrics/sample_vector.h" | 11 #include "base/metrics/sample_vector.h" |
12 #include "base/metrics/statistics_recorder.h" | 12 #include "base/metrics/statistics_recorder.h" |
13 #include "net/disk_cache/stats.h" | 13 #include "net/disk_cache/stats.h" |
14 | 14 |
15 namespace disk_cache { | 15 namespace disk_cache { |
16 | 16 |
17 using base::BucketRanges; | 17 using base::BucketRanges; |
18 using base::Histogram; | 18 using base::Histogram; |
19 using base::HistogramSamples; | 19 using base::HistogramSamples; |
20 using base::SampleVector; | 20 using base::SampleVector; |
21 using base::StatisticsRecorder; | 21 using base::StatisticsRecorder; |
22 | 22 |
23 StatsHistogram::StatsHistogram(const std::string& name, | 23 StatsHistogram::StatsHistogram(const std::string& name, |
24 Sample minimum, | 24 Sample minimum, |
25 Sample maximum, | 25 Sample maximum, |
26 size_t bucket_count, | |
27 const BucketRanges* ranges, | 26 const BucketRanges* ranges, |
28 const Stats* stats) | 27 const Stats* stats) |
29 : Histogram(name, minimum, maximum, bucket_count, ranges), | 28 : Histogram(name, minimum, maximum, ranges), |
30 stats_(stats) {} | 29 stats_(stats) {} |
31 | 30 |
32 StatsHistogram::~StatsHistogram() {} | 31 StatsHistogram::~StatsHistogram() {} |
33 | 32 |
34 // static | 33 // static |
35 void StatsHistogram::InitializeBucketRanges(const Stats* stats, | 34 void StatsHistogram::InitializeBucketRanges(const Stats* stats, |
36 BucketRanges* ranges) { | 35 BucketRanges* ranges) { |
37 for (size_t i = 0; i < ranges->size(); i++) { | 36 for (size_t i = 0; i < ranges->size(); ++i) { |
38 ranges->set_range(i, stats->GetBucketRange(i)); | 37 ranges->set_range(i, stats->GetBucketRange(i)); |
39 } | 38 } |
40 ranges->ResetChecksum(); | 39 ranges->ResetChecksum(); |
41 } | 40 } |
42 | 41 |
43 StatsHistogram* StatsHistogram::FactoryGet(const std::string& name, | 42 StatsHistogram* StatsHistogram::FactoryGet(const std::string& name, |
44 const Stats* stats) { | 43 const Stats* stats) { |
45 Sample minimum = 1; | 44 Sample minimum = 1; |
46 Sample maximum = disk_cache::Stats::kDataSizesLength - 1; | 45 Sample maximum = disk_cache::Stats::kDataSizesLength - 1; |
47 size_t bucket_count = disk_cache::Stats::kDataSizesLength; | 46 size_t bucket_count = disk_cache::Stats::kDataSizesLength; |
48 HistogramBase* histogram = StatisticsRecorder::FindHistogram(name); | 47 HistogramBase* histogram = StatisticsRecorder::FindHistogram(name); |
49 if (!histogram) { | 48 if (!histogram) { |
50 DCHECK(stats); | 49 DCHECK(stats); |
51 | 50 |
52 // To avoid racy destruction at shutdown, the following will be leaked. | 51 // To avoid racy destruction at shutdown, the following will be leaked. |
53 BucketRanges* ranges = new BucketRanges(bucket_count + 1); | 52 BucketRanges* ranges = new BucketRanges(bucket_count + 1); |
54 InitializeBucketRanges(stats, ranges); | 53 InitializeBucketRanges(stats, ranges); |
55 const BucketRanges* registered_ranges = | 54 const BucketRanges* registered_ranges = |
56 StatisticsRecorder::RegisterOrDeleteDuplicateRanges(ranges); | 55 StatisticsRecorder::RegisterOrDeleteDuplicateRanges(ranges); |
57 | 56 |
58 // To avoid racy destruction at shutdown, the following will be leaked. | 57 // To avoid racy destruction at shutdown, the following will be leaked. |
59 StatsHistogram* stats_histogram = | 58 StatsHistogram* stats_histogram = |
60 new StatsHistogram(name, minimum, maximum, bucket_count, | 59 new StatsHistogram(name, minimum, maximum, registered_ranges, stats); |
61 registered_ranges, stats); | |
62 stats_histogram->SetFlags(kUmaTargetedHistogramFlag); | 60 stats_histogram->SetFlags(kUmaTargetedHistogramFlag); |
63 histogram = StatisticsRecorder::RegisterOrDeleteDuplicate(stats_histogram); | 61 histogram = StatisticsRecorder::RegisterOrDeleteDuplicate(stats_histogram); |
64 } | 62 } |
65 | 63 |
66 DCHECK(base::HISTOGRAM == histogram->GetHistogramType()); | 64 DCHECK(base::HISTOGRAM == histogram->GetHistogramType()); |
67 DCHECK(histogram->HasConstructionArguments(minimum, maximum, bucket_count)); | 65 DCHECK(histogram->HasConstructionArguments(minimum, maximum, bucket_count)); |
68 | 66 |
69 // We're preparing for an otherwise unsafe upcast by ensuring we have the | 67 // We're preparing for an otherwise unsafe upcast by ensuring we have the |
70 // proper class type. | 68 // proper class type. |
71 StatsHistogram* return_histogram = static_cast<StatsHistogram*>(histogram); | 69 StatsHistogram* return_histogram = static_cast<StatsHistogram*>(histogram); |
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82 | 80 |
83 return samples.PassAs<HistogramSamples>(); | 81 return samples.PassAs<HistogramSamples>(); |
84 } | 82 } |
85 | 83 |
86 int StatsHistogram::FindCorruption(const HistogramSamples& samples) const { | 84 int StatsHistogram::FindCorruption(const HistogramSamples& samples) const { |
87 // This class won't monitor inconsistencies. | 85 // This class won't monitor inconsistencies. |
88 return HistogramBase::NO_INCONSISTENCIES; | 86 return HistogramBase::NO_INCONSISTENCIES; |
89 } | 87 } |
90 | 88 |
91 } // namespace disk_cache | 89 } // namespace disk_cache |
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