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1 // Copyright 2014 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 // This file contains macros to simplify histogram reporting from the disk | |
6 // cache. The main issue is that we want to have separate histograms for each | |
7 // type of cache (regular vs. media, etc), without adding the complexity of | |
8 // keeping track of a potentially large number of histogram objects that have to | |
9 // survive the backend object that created them. | |
10 | |
11 #ifndef NET_DISK_CACHE_BLOCKFILE_HISTOGRAM_MACROS_V3_H_ | |
12 #define NET_DISK_CACHE_BLOCKFILE_HISTOGRAM_MACROS_V3_H_ | |
13 | |
14 // ----------------------------------------------------------------------------- | |
15 | |
16 // These histograms follow the definition of UMA_HISTOGRAMN_XXX except that | |
17 // whenever the name changes (the experiment group changes), the histrogram | |
18 // object is re-created. | |
19 | |
20 #define CACHE_HISTOGRAM_CUSTOM_COUNTS(name, sample, min, max, bucket_count) \ | |
21 do { \ | |
22 base::HistogramBase* counter(NULL); \ | |
23 if (!counter || name != counter->histogram_name()) \ | |
24 counter = base::Histogram::FactoryGet( \ | |
25 name, min, max, bucket_count, \ | |
26 base::Histogram::kUmaTargetedHistogramFlag); \ | |
27 counter->Add(sample); \ | |
28 } while (0) | |
29 | |
30 #define CACHE_HISTOGRAM_COUNTS(name, sample) CACHE_HISTOGRAM_CUSTOM_COUNTS( \ | |
31 name, sample, 1, 1000000, 50) | |
32 | |
33 #define CACHE_HISTOGRAM_COUNTS_10000(name, sample) \ | |
34 CACHE_HISTOGRAM_CUSTOM_COUNTS(name, sample, 1, 10000, 50) | |
35 | |
36 #define CACHE_HISTOGRAM_COUNTS_50000(name, sample) \ | |
37 CACHE_HISTOGRAM_CUSTOM_COUNTS(name, sample, 1, 50000000, 50) | |
38 | |
39 #define CACHE_HISTOGRAM_CUSTOM_TIMES(name, sample, min, max, bucket_count) \ | |
40 do { \ | |
41 base::HistogramBase* counter(NULL); \ | |
42 if (!counter || name != counter->histogram_name()) \ | |
43 counter = base::Histogram::FactoryTimeGet( \ | |
44 name, min, max, bucket_count, \ | |
45 base::Histogram::kUmaTargetedHistogramFlag); \ | |
46 counter->AddTime(sample); \ | |
47 } while (0) | |
48 | |
49 #define CACHE_HISTOGRAM_TIMES(name, sample) CACHE_HISTOGRAM_CUSTOM_TIMES( \ | |
50 name, sample, base::TimeDelta::FromMilliseconds(1), \ | |
51 base::TimeDelta::FromSeconds(10), 50) | |
52 | |
53 #define CACHE_HISTOGRAM_ENUMERATION(name, sample, boundary_value) do { \ | |
54 base::HistogramBase* counter(NULL); \ | |
55 if (!counter || name != counter->histogram_name()) \ | |
56 counter = base::LinearHistogram::FactoryGet( \ | |
57 name, 1, boundary_value, boundary_value + 1, \ | |
58 base::Histogram::kUmaTargetedHistogramFlag); \ | |
59 counter->Add(sample); \ | |
60 } while (0) | |
61 | |
62 #define CACHE_HISTOGRAM_PERCENTAGE(name, under_one_hundred) \ | |
63 CACHE_HISTOGRAM_ENUMERATION(name, under_one_hundred, 101) | |
64 | |
65 // ----------------------------------------------------------------------------- | |
66 | |
67 // HISTOGRAM_HOURS will collect time related data with a granularity of hours | |
68 // and normal values of a few months. | |
69 #define CACHE_HISTOGRAM_HOURS CACHE_HISTOGRAM_COUNTS_10000 | |
70 | |
71 // HISTOGRAM_AGE will collect time elapsed since |initial_time|, with a | |
72 // granularity of hours and normal values of a few months. | |
73 #define CACHE_HISTOGRAM_AGE(name, initial_time) \ | |
74 CACHE_HISTOGRAM_COUNTS_10000(name, \ | |
75 (base::Time::Now() - initial_time).InHours()) | |
76 | |
77 // HISTOGRAM_AGE_MS will collect time elapsed since |initial_time|, with the | |
78 // normal resolution of the UMA_HISTOGRAM_TIMES. | |
79 #define CACHE_HISTOGRAM_AGE_MS(name, initial_time)\ | |
80 CACHE_HISTOGRAM_TIMES(name, base::TimeTicks::Now() - initial_time) | |
81 | |
82 #define CACHE_HISTOGRAM_CACHE_ERROR(name, sample) \ | |
83 CACHE_HISTOGRAM_ENUMERATION(name, sample, 50) | |
84 | |
85 // Generates a UMA histogram of the given type, generating the proper name for | |
86 // it (asking backend_->HistogramName), and adding the provided sample. | |
87 // For example, to generate a regualar UMA_HISTOGRAM_COUNTS, this macro would | |
88 // be used as: | |
89 // CACHE_UMA(COUNTS, "MyName", 20); | |
90 // which may translate to: | |
91 // UMA_HISTOGRAM_COUNTS("DiskCache3.MyName_AppCache", 20); | |
92 // | |
93 #define CACHE_UMA(type, name, sample) {\ | |
94 const std::string my_name =\ | |
95 CACHE_UMA_BACKEND_IMPL_OBJ->HistogramName(name);\ | |
96 switch (CACHE_UMA_BACKEND_IMPL_OBJ->cache_type()) {\ | |
97 case net::DISK_CACHE:\ | |
98 case net::MEDIA_CACHE:\ | |
99 case net::APP_CACHE:\ | |
100 case net::SHADER_CACHE:\ | |
101 case net::PNACL_CACHE:\ | |
102 CACHE_HISTOGRAM_##type(my_name.data(), sample);\ | |
103 break;\ | |
104 default:\ | |
105 break;\ | |
106 }\ | |
107 } | |
108 | |
109 #endif // NET_DISK_CACHE_BLOCKFILE_HISTOGRAM_MACROS_V3_H_ | |
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