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Issue 1738063002: Refactor histogram_persistence to be a class. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: move some parameters up a line Created 4 years, 9 months ago
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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 "chrome/browser/chrome_browser_field_trials.h" 5 #include "chrome/browser/chrome_browser_field_trials.h"
6 6
7 #include <string> 7 #include <string>
8 8
9 #include "base/command_line.h" 9 #include "base/command_line.h"
10 #include "base/feature_list.h" 10 #include "base/feature_list.h"
11 #include "base/metrics/field_trial.h" 11 #include "base/metrics/field_trial.h"
12 #include "base/metrics/histogram_base.h" 12 #include "base/metrics/histogram_base.h"
13 #include "base/metrics/histogram_persistence.h" 13 #include "base/metrics/persistent_histogram_allocator.h"
14 #include "base/strings/string_util.h" 14 #include "base/strings/string_util.h"
15 #include "base/time/time.h" 15 #include "base/time/time.h"
16 #include "build/build_config.h" 16 #include "build/build_config.h"
17 #include "chrome/common/chrome_switches.h" 17 #include "chrome/common/chrome_switches.h"
18 #include "components/metrics/metrics_pref_names.h" 18 #include "components/metrics/metrics_pref_names.h"
19 19
20 #if defined(OS_ANDROID) 20 #if defined(OS_ANDROID)
21 #include "chrome/browser/chrome_browser_field_trials_mobile.h" 21 #include "chrome/browser/chrome_browser_field_trials_mobile.h"
22 #else 22 #else
23 #include "chrome/browser/chrome_browser_field_trials_desktop.h" 23 #include "chrome/browser/chrome_browser_field_trials_desktop.h"
24 #endif 24 #endif
25 25
26 namespace { 26 namespace {
27 27
28 // Check for feature enabling the use of persistent histogram storage and 28 // Check for feature enabling the use of persistent histogram storage and
29 // create an appropriate allocator for such if so. 29 // create an appropriate allocator for such if so.
30 void InstantiatePersistentHistograms() { 30 void InstantiatePersistentHistograms() {
31 if (base::FeatureList::IsEnabled(base::kPersistentHistogramsFeature)) { 31 if (base::FeatureList::IsEnabled(base::kPersistentHistogramsFeature)) {
32 const char kAllocatorName[] = "BrowserMetrics"; 32 const char kAllocatorName[] = "BrowserMetrics";
33 // Create persistent/shared memory and allow histograms to be stored in it. 33 // Create persistent/shared memory and allow histograms to be stored in it.
34 // Memory that is not actualy used won't be physically mapped by the system. 34 // Memory that is not actualy used won't be physically mapped by the system.
35 // BrowserMetrics usage peaked around 95% of 2MiB as of 2016-02-20. 35 // BrowserMetrics usage peaked around 95% of 2MiB as of 2016-02-20.
36 base::SetPersistentHistogramMemoryAllocator( 36 base::PersistentHistogramAllocator::CreateGlobalAllocatorOnLocalMemory(
37 new base::LocalPersistentMemoryAllocator(3 << 20, // 3 MiB 37 3 << 20, // 3 MiB
38 0x935DDD43, // SHA1(B...M...) 38 0x935DDD43, // SHA1(BrowserMetrics)
39 kAllocatorName));
40 base::GetPersistentHistogramMemoryAllocator()->CreateTrackingHistograms(
41 kAllocatorName); 39 kAllocatorName);
40 base::PersistentHistogramAllocator::GetGlobalAllocator()
41 ->CreateTrackingHistograms(kAllocatorName);
42 } 42 }
43 } 43 }
44 44
45 } // namespace 45 } // namespace
46 46
47 ChromeBrowserFieldTrials::ChromeBrowserFieldTrials( 47 ChromeBrowserFieldTrials::ChromeBrowserFieldTrials(
48 const base::CommandLine& parsed_command_line) 48 const base::CommandLine& parsed_command_line)
49 : parsed_command_line_(parsed_command_line) { 49 : parsed_command_line_(parsed_command_line) {
50 } 50 }
51 51
52 ChromeBrowserFieldTrials::~ChromeBrowserFieldTrials() { 52 ChromeBrowserFieldTrials::~ChromeBrowserFieldTrials() {
53 } 53 }
54 54
55 void ChromeBrowserFieldTrials::SetupFieldTrials() { 55 void ChromeBrowserFieldTrials::SetupFieldTrials() {
56 // Field trials that are shared by all platforms. 56 // Field trials that are shared by all platforms.
57 InstantiateDynamicTrials(); 57 InstantiateDynamicTrials();
58 58
59 #if defined(OS_ANDROID) 59 #if defined(OS_ANDROID)
60 chrome::SetupMobileFieldTrials(parsed_command_line_); 60 chrome::SetupMobileFieldTrials(parsed_command_line_);
61 #else 61 #else
62 chrome::SetupDesktopFieldTrials(parsed_command_line_); 62 chrome::SetupDesktopFieldTrials(parsed_command_line_);
63 #endif 63 #endif
64 } 64 }
65 65
66 void ChromeBrowserFieldTrials::InstantiateDynamicTrials() { 66 void ChromeBrowserFieldTrials::InstantiateDynamicTrials() {
67 // Persistent histograms must be enabled as soon as possible. 67 // Persistent histograms must be enabled as soon as possible.
68 InstantiatePersistentHistograms(); 68 InstantiatePersistentHistograms();
69 } 69 }
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