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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "base/metrics/histogram_base.h" | |
| 6 | |
| 7 #include <climits> | |
| 8 | |
| 9 #include "base/json/json_string_value_serializer.h" | |
| 10 #include "base/logging.h" | |
| 11 #include "base/memory/scoped_ptr.h" | |
| 12 #include "base/metrics/histogram.h" | |
| 13 #include "base/metrics/histogram_samples.h" | |
| 14 #include "base/metrics/sparse_histogram.h" | |
| 15 #include "base/metrics/statistics_recorder.h" | |
| 16 #include "base/pickle.h" | |
| 17 #include "base/process/process_handle.h" | |
| 18 #include "base/strings/stringprintf.h" | |
| 19 #include "base/values.h" | |
| 20 | |
| 21 namespace base { | |
| 22 | |
| 23 std::string HistogramTypeToString(HistogramType type) { | |
| 24 switch (type) { | |
| 25 case HISTOGRAM: | |
| 26 return "HISTOGRAM"; | |
| 27 case LINEAR_HISTOGRAM: | |
| 28 return "LINEAR_HISTOGRAM"; | |
| 29 case BOOLEAN_HISTOGRAM: | |
| 30 return "BOOLEAN_HISTOGRAM"; | |
| 31 case CUSTOM_HISTOGRAM: | |
| 32 return "CUSTOM_HISTOGRAM"; | |
| 33 case SPARSE_HISTOGRAM: | |
| 34 return "SPARSE_HISTOGRAM"; | |
| 35 default: | |
| 36 NOTREACHED(); | |
| 37 } | |
| 38 return "UNKNOWN"; | |
| 39 } | |
| 40 | |
| 41 HistogramBase* DeserializeHistogramInfo(PickleIterator* iter) { | |
| 42 int type; | |
| 43 if (!iter->ReadInt(&type)) | |
| 44 return NULL; | |
| 45 | |
| 46 switch (type) { | |
| 47 case HISTOGRAM: | |
| 48 return Histogram::DeserializeInfoImpl(iter); | |
| 49 case LINEAR_HISTOGRAM: | |
| 50 return LinearHistogram::DeserializeInfoImpl(iter); | |
| 51 case BOOLEAN_HISTOGRAM: | |
| 52 return BooleanHistogram::DeserializeInfoImpl(iter); | |
| 53 case CUSTOM_HISTOGRAM: | |
| 54 return CustomHistogram::DeserializeInfoImpl(iter); | |
| 55 case SPARSE_HISTOGRAM: | |
| 56 return SparseHistogram::DeserializeInfoImpl(iter); | |
| 57 default: | |
| 58 return NULL; | |
| 59 } | |
| 60 } | |
| 61 | |
| 62 const HistogramBase::Sample HistogramBase::kSampleType_MAX = INT_MAX; | |
| 63 | |
| 64 HistogramBase::HistogramBase(const std::string& name) | |
| 65 : histogram_name_(name), | |
| 66 flags_(kNoFlags) {} | |
| 67 | |
| 68 HistogramBase::~HistogramBase() {} | |
| 69 | |
| 70 void HistogramBase::CheckName(const StringPiece& name) const { | |
| 71 DCHECK_EQ(histogram_name(), name); | |
| 72 } | |
| 73 | |
| 74 void HistogramBase::SetFlags(int32 flags) { | |
| 75 flags_ |= flags; | |
| 76 } | |
| 77 | |
| 78 void HistogramBase::ClearFlags(int32 flags) { | |
| 79 flags_ &= ~flags; | |
| 80 } | |
| 81 | |
| 82 void HistogramBase::AddTime(const TimeDelta& time) { | |
| 83 Add(static_cast<Sample>(time.InMilliseconds())); | |
| 84 } | |
| 85 | |
| 86 void HistogramBase::AddBoolean(bool value) { | |
| 87 Add(value ? 1 : 0); | |
| 88 } | |
| 89 | |
| 90 bool HistogramBase::SerializeInfo(Pickle* pickle) const { | |
| 91 if (!pickle->WriteInt(GetHistogramType())) | |
| 92 return false; | |
| 93 return SerializeInfoImpl(pickle); | |
| 94 } | |
| 95 | |
| 96 int HistogramBase::FindCorruption(const HistogramSamples& samples) const { | |
| 97 // Not supported by default. | |
| 98 return NO_INCONSISTENCIES; | |
| 99 } | |
| 100 | |
| 101 void HistogramBase::WriteJSON(std::string* output) const { | |
| 102 Count count; | |
| 103 int64 sum; | |
| 104 scoped_ptr<ListValue> buckets(new ListValue()); | |
| 105 GetCountAndBucketData(&count, &sum, buckets.get()); | |
| 106 scoped_ptr<DictionaryValue> parameters(new DictionaryValue()); | |
| 107 GetParameters(parameters.get()); | |
| 108 | |
| 109 JSONStringValueSerializer serializer(output); | |
| 110 DictionaryValue root; | |
| 111 root.SetString("name", histogram_name()); | |
| 112 root.SetInteger("count", count); | |
| 113 root.SetDouble("sum", static_cast<double>(sum)); | |
| 114 root.SetInteger("flags", flags()); | |
| 115 root.Set("params", parameters.Pass()); | |
| 116 root.Set("buckets", buckets.Pass()); | |
| 117 root.SetInteger("pid", GetCurrentProcId()); | |
| 118 serializer.Serialize(root); | |
| 119 } | |
| 120 | |
| 121 void HistogramBase::FindAndRunCallback(HistogramBase::Sample sample) const { | |
| 122 if ((flags_ & kCallbackExists) == 0) | |
| 123 return; | |
| 124 | |
| 125 StatisticsRecorder::OnSampleCallback cb = | |
| 126 StatisticsRecorder::FindCallback(histogram_name()); | |
| 127 if (!cb.is_null()) | |
| 128 cb.Run(sample); | |
| 129 } | |
| 130 | |
| 131 void HistogramBase::WriteAsciiBucketGraph(double current_size, | |
| 132 double max_size, | |
| 133 std::string* output) const { | |
| 134 const int k_line_length = 72; // Maximal horizontal width of graph. | |
| 135 int x_count = static_cast<int>(k_line_length * (current_size / max_size) | |
| 136 + 0.5); | |
| 137 int x_remainder = k_line_length - x_count; | |
| 138 | |
| 139 while (0 < x_count--) | |
| 140 output->append("-"); | |
| 141 output->append("O"); | |
| 142 while (0 < x_remainder--) | |
| 143 output->append(" "); | |
| 144 } | |
| 145 | |
| 146 const std::string HistogramBase::GetSimpleAsciiBucketRange( | |
| 147 Sample sample) const { | |
| 148 std::string result; | |
| 149 if (kHexRangePrintingFlag & flags()) | |
| 150 StringAppendF(&result, "%#x", sample); | |
| 151 else | |
| 152 StringAppendF(&result, "%d", sample); | |
| 153 return result; | |
| 154 } | |
| 155 | |
| 156 void HistogramBase::WriteAsciiBucketValue(Count current, | |
| 157 double scaled_sum, | |
| 158 std::string* output) const { | |
| 159 StringAppendF(output, " (%d = %3.1f%%)", current, current/scaled_sum); | |
| 160 } | |
| 161 | |
| 162 } // namespace base | |
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