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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/metrics/histogram_base.h"
#include <limits.h>
#include <memory>
#include <utility>
#include "base/json/json_string_value_serializer.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/metrics/histogram_samples.h"
#include "base/metrics/sparse_histogram.h"
#include "base/metrics/statistics_recorder.h"
#include "base/pickle.h"
#include "base/process/process_handle.h"
#include "base/strings/stringprintf.h"
#include "base/values.h"
namespace base {
std::string HistogramTypeToString(HistogramType type) {
switch (type) {
case HISTOGRAM:
return "HISTOGRAM";
case LINEAR_HISTOGRAM:
return "LINEAR_HISTOGRAM";
case BOOLEAN_HISTOGRAM:
return "BOOLEAN_HISTOGRAM";
case CUSTOM_HISTOGRAM:
return "CUSTOM_HISTOGRAM";
case SPARSE_HISTOGRAM:
return "SPARSE_HISTOGRAM";
}
NOTREACHED();
return "UNKNOWN";
}
HistogramBase* DeserializeHistogramInfo(PickleIterator* iter) {
int type;
if (!iter->ReadInt(&type))
return NULL;
switch (type) {
case HISTOGRAM:
return Histogram::DeserializeInfoImpl(iter);
case LINEAR_HISTOGRAM:
return LinearHistogram::DeserializeInfoImpl(iter);
case BOOLEAN_HISTOGRAM:
return BooleanHistogram::DeserializeInfoImpl(iter);
case CUSTOM_HISTOGRAM:
return CustomHistogram::DeserializeInfoImpl(iter);
case SPARSE_HISTOGRAM:
return SparseHistogram::DeserializeInfoImpl(iter);
default:
return NULL;
}
}
const HistogramBase::Sample HistogramBase::kSampleType_MAX = INT_MAX;
HistogramBase* HistogramBase::report_histogram_ = nullptr;
HistogramBase::HistogramBase(const std::string& name)
: histogram_name_(name),
flags_(kNoFlags) {}
HistogramBase::~HistogramBase() {}
void HistogramBase::CheckName(const StringPiece& name) const {
DCHECK_EQ(histogram_name(), name);
}
void HistogramBase::SetFlags(int32_t flags) {
HistogramBase::Count old_flags = subtle::NoBarrier_Load(&flags_);
subtle::NoBarrier_Store(&flags_, old_flags | flags);
}
void HistogramBase::ClearFlags(int32_t flags) {
HistogramBase::Count old_flags = subtle::NoBarrier_Load(&flags_);
subtle::NoBarrier_Store(&flags_, old_flags & ~flags);
}
void HistogramBase::AddTime(const TimeDelta& time) {
Add(static_cast<Sample>(time.InMilliseconds()));
}
void HistogramBase::AddBoolean(bool value) {
Add(value ? 1 : 0);
}
bool HistogramBase::SerializeInfo(Pickle* pickle) const {
if (!pickle->WriteInt(GetHistogramType()))
return false;
return SerializeInfoImpl(pickle);
}
uint32_t HistogramBase::FindCorruption(const HistogramSamples& samples) const {
// Not supported by default.
return NO_INCONSISTENCIES;
}
void HistogramBase::WriteJSON(std::string* output) const {
Count count;
int64_t sum;
std::unique_ptr<ListValue> buckets(new ListValue());
GetCountAndBucketData(&count, &sum, buckets.get());
std::unique_ptr<DictionaryValue> parameters(new DictionaryValue());
GetParameters(parameters.get());
JSONStringValueSerializer serializer(output);
DictionaryValue root;
root.SetString("name", histogram_name());
root.SetInteger("count", count);
root.SetDouble("sum", static_cast<double>(sum));
root.SetInteger("flags", flags());
root.Set("params", std::move(parameters));
root.Set("buckets", std::move(buckets));
root.SetInteger("pid", GetUniqueIdForProcess());
serializer.Serialize(root);
}
// static
void HistogramBase::EnableActivityReportHistogram(
const std::string& process_type) {
if (report_histogram_)
return;
size_t existing = StatisticsRecorder::GetHistogramCount();
if (existing != 0) {
DVLOG(1) << existing
<< " histograms were created before reporting was enabled.";
}
std::string name =
"UMA.Histograms.Activity" +
(process_type.empty() ? process_type : "." + process_type);
// Calling FactoryGet() here rather than using a histogram-macro works
// around some problems with tests that could end up seeing the results
// histogram when not expected due to a bad interaction between
// HistogramTester and StatisticsRecorder.
report_histogram_ = LinearHistogram::FactoryGet(
name, 1, HISTOGRAM_REPORT_MAX, HISTOGRAM_REPORT_MAX + 1,
kUmaTargetedHistogramFlag);
report_histogram_->Add(HISTOGRAM_REPORT_CREATED);
}
void HistogramBase::FindAndRunCallback(HistogramBase::Sample sample) const {
if ((flags() & kCallbackExists) == 0)
return;
StatisticsRecorder::OnSampleCallback cb =
StatisticsRecorder::FindCallback(histogram_name());
if (!cb.is_null())
cb.Run(sample);
}
void HistogramBase::WriteAsciiBucketGraph(double current_size,
double max_size,
std::string* output) const {
const int k_line_length = 72; // Maximal horizontal width of graph.
int x_count = static_cast<int>(k_line_length * (current_size / max_size)
+ 0.5);
int x_remainder = k_line_length - x_count;
while (0 < x_count--)
output->append("-");
output->append("O");
while (0 < x_remainder--)
output->append(" ");
}
const std::string HistogramBase::GetSimpleAsciiBucketRange(
Sample sample) const {
return StringPrintf("%d", sample);
}
void HistogramBase::WriteAsciiBucketValue(Count current,
double scaled_sum,
std::string* output) const {
StringAppendF(output, " (%d = %3.1f%%)", current, current/scaled_sum);
}
// static
void HistogramBase::ReportHistogramActivity(const HistogramBase& histogram,
ReportActivity activity) {
if (!report_histogram_)
return;
const int32_t flags = histogram.flags_;
HistogramReport report_type = HISTOGRAM_REPORT_MAX;
switch (activity) {
case HISTOGRAM_CREATED:
report_histogram_->Add(HISTOGRAM_REPORT_HISTOGRAM_CREATED);
switch (histogram.GetHistogramType()) {
case HISTOGRAM:
report_type = HISTOGRAM_REPORT_TYPE_LOGARITHMIC;
break;
case LINEAR_HISTOGRAM:
report_type = HISTOGRAM_REPORT_TYPE_LINEAR;
break;
case BOOLEAN_HISTOGRAM:
report_type = HISTOGRAM_REPORT_TYPE_BOOLEAN;
break;
case CUSTOM_HISTOGRAM:
report_type = HISTOGRAM_REPORT_TYPE_CUSTOM;
break;
case SPARSE_HISTOGRAM:
report_type = HISTOGRAM_REPORT_TYPE_SPARSE;
break;
}
report_histogram_->Add(report_type);
if (flags & kIsPersistent)
report_histogram_->Add(HISTOGRAM_REPORT_FLAG_PERSISTENT);
if ((flags & kUmaStabilityHistogramFlag) == kUmaStabilityHistogramFlag)
report_histogram_->Add(HISTOGRAM_REPORT_FLAG_UMA_STABILITY);
else if (flags & kUmaTargetedHistogramFlag)
report_histogram_->Add(HISTOGRAM_REPORT_FLAG_UMA_TARGETED);
break;
case HISTOGRAM_LOOKUP:
report_histogram_->Add(HISTOGRAM_REPORT_HISTOGRAM_LOOKUP);
break;
}
}
} // namespace base
|
