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Issue 10454086: Histograms - Support histograms for Plugins, GPU (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: Created 8 years, 5 months ago
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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 "content/browser/histogram_controller.h"
6
7 #include "base/bind.h"
8 #include "base/metrics/histogram.h"
9 #include "content/browser/histogram_subscriber.h"
10 #include "content/common/child_process_messages.h"
11 #include "content/public/browser/browser_child_process_host_iterator.h"
12 #include "content/public/browser/browser_thread.h"
13 #include "content/public/browser/child_process_data.h"
14 #include "content/public/browser/render_process_host.h"
15
16 namespace content {
17
18 HistogramController* HistogramController::GetInstance() {
19 return Singleton<HistogramController>::get();
20 }
21
22 HistogramController::HistogramController() : subscriber_(NULL) {
23 }
24
25 HistogramController::~HistogramController() {
26 }
27
28 void HistogramController::OnPendingProcesses(int sequence_number,
29 int pending_processes,
30 bool end) {
31 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
32 if (subscriber_)
33 subscriber_->OnPendingProcesses(sequence_number, pending_processes, end);
34 }
35
36 void HistogramController::OnHistogramDataCollected(
37 int sequence_number,
38 const std::vector<std::string>& pickled_histograms) {
39 if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
40 BrowserThread::PostTask(
41 BrowserThread::UI, FROM_HERE,
42 base::Bind(&HistogramController::OnHistogramDataCollected,
43 base::Unretained(this),
44 sequence_number,
45 pickled_histograms));
46 return;
47 }
48
49 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
50 if (subscriber_) {
51 subscriber_->OnHistogramDataCollected(sequence_number,
52 pickled_histograms);
53 }
54 }
55
56 void HistogramController::Register(HistogramSubscriber* subscriber) {
57 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
58 DCHECK(!subscriber_);
59 subscriber_ = subscriber;
60 }
61
62 void HistogramController::Unregister(
63 const HistogramSubscriber* subscriber) {
64 DCHECK_EQ(subscriber_, subscriber);
65 subscriber_ = NULL;
66 }
67
68 void HistogramController::GetHistogramDataFromChildProcesses(
69 int sequence_number) {
70 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
71
72 int pending_processes = 0;
73 for (BrowserChildProcessHostIterator iter; !iter.Done(); ++iter) {
74 ++pending_processes;
75 if (!iter.Send(new ChildProcessMsg_GetChildHistogramData(sequence_number)))
76 --pending_processes;
77 }
78
79 BrowserThread::PostTask(
80 BrowserThread::UI,
81 FROM_HERE,
82 base::Bind(
83 &HistogramController::OnPendingProcesses,
84 base::Unretained(this),
85 sequence_number,
86 pending_processes,
87 true));
88 }
89
90 void HistogramController::GetHistogramData(int sequence_number) {
91 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
92
93 int pending_processes = 0;
94 for (RenderProcessHost::iterator it(RenderProcessHost::AllHostsIterator());
95 !it.IsAtEnd(); it.Advance()) {
96 ++pending_processes;
97 if (!it.GetCurrentValue()->Send(
98 new ChildProcessMsg_GetChildHistogramData(sequence_number))) {
99 --pending_processes;
100 }
101 }
102 OnPendingProcesses(sequence_number, pending_processes, false);
103
104 BrowserThread::PostTask(
105 BrowserThread::IO,
106 FROM_HERE,
107 base::Bind(&HistogramController::GetHistogramDataFromChildProcesses,
108 base::Unretained(this),
109 sequence_number));
110 }
111
112 } // namespace content
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