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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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/metrics/histogram_synchronizer.h" | 5 #include "chrome/browser/metrics/histogram_synchronizer.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/logging.h" | 8 #include "base/logging.h" |
9 #include "base/metrics/histogram.h" | 9 #include "base/metrics/histogram.h" |
10 #include "base/threading/thread.h" | 10 #include "base/threading/thread.h" |
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71 unresponsive_renderer_count); | 71 unresponsive_renderer_count); |
72 if (!unresponsive_renderer_count) | 72 if (!unresponsive_renderer_count) |
73 UMA_HISTOGRAM_TIMES("Histogram.FetchRendererHistogramsSynchronously", | 73 UMA_HISTOGRAM_TIMES("Histogram.FetchRendererHistogramsSynchronously", |
74 TimeTicks::Now() - start); | 74 TimeTicks::Now() - start); |
75 } | 75 } |
76 | 76 |
77 // static | 77 // static |
78 void HistogramSynchronizer::FetchRendererHistogramsAsynchronously( | 78 void HistogramSynchronizer::FetchRendererHistogramsAsynchronously( |
79 MessageLoop* callback_thread, | 79 MessageLoop* callback_thread, |
80 const base::Closure& callback, | 80 const base::Closure& callback, |
81 int wait_time) { | 81 int wait_time) { |
jar (doing other things)
2012/03/03 22:54:43
I *think* you should propagate the chage further b
| |
82 DCHECK(callback_thread != NULL); | 82 DCHECK(callback_thread != NULL); |
83 DCHECK(!callback.is_null()); | 83 DCHECK(!callback.is_null()); |
84 | 84 |
85 HistogramSynchronizer* current_synchronizer = CurrentSynchronizer(); | 85 HistogramSynchronizer* current_synchronizer = CurrentSynchronizer(); |
86 | 86 |
87 if (current_synchronizer == NULL) { | 87 if (current_synchronizer == NULL) { |
88 // System teardown is happening. | 88 // System teardown is happening. |
89 callback_thread->PostTask(FROM_HERE, callback); | 89 callback_thread->PostTask(FROM_HERE, callback); |
90 return; | 90 return; |
91 } | 91 } |
92 | 92 |
93 current_synchronizer->SetCallbackTaskAndThread(callback_thread, | 93 current_synchronizer->SetCallbackTaskAndThread(callback_thread, |
94 callback); | 94 callback); |
95 | 95 |
96 int sequence_number = | 96 int sequence_number = |
97 current_synchronizer->NotifyAllRenderers(ASYNC_HISTOGRAMS); | 97 current_synchronizer->NotifyAllRenderers(ASYNC_HISTOGRAMS); |
98 | 98 |
99 // Post a task that would be called after waiting for wait_time. This acts | 99 // Post a task that would be called after waiting for wait_time. This acts |
100 // as a watchdog, to ensure that a non-responsive renderer won't block us from | 100 // as a watchdog, to ensure that a non-responsive renderer won't block us from |
101 // making the callback. | 101 // making the callback. |
102 BrowserThread::PostDelayedTask( | 102 BrowserThread::PostDelayedTask( |
103 BrowserThread::UI, FROM_HERE, | 103 BrowserThread::UI, FROM_HERE, |
104 base::Bind( | 104 base::Bind( |
105 &HistogramSynchronizer::ForceHistogramSynchronizationDoneCallback, | 105 &HistogramSynchronizer::ForceHistogramSynchronizationDoneCallback, |
106 current_synchronizer, | 106 current_synchronizer, |
107 sequence_number), | 107 sequence_number), |
108 wait_time); | 108 base::TimeDelta::FromMilliseconds(wait_time)); |
109 } | 109 } |
110 | 110 |
111 // static | 111 // static |
112 void HistogramSynchronizer::DeserializeHistogramList( | 112 void HistogramSynchronizer::DeserializeHistogramList( |
113 int sequence_number, | 113 int sequence_number, |
114 const std::vector<std::string>& histograms) { | 114 const std::vector<std::string>& histograms) { |
115 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); | 115 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); |
116 for (std::vector<std::string>::const_iterator it = histograms.begin(); | 116 for (std::vector<std::string>::const_iterator it = histograms.begin(); |
117 it < histograms.end(); | 117 it < histograms.end(); |
118 ++it) { | 118 ++it) { |
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253 async_renderers_pending_ = renderer_count; | 253 async_renderers_pending_ = renderer_count; |
254 } else if (requester == SYNCHRONOUS_HISTOGRAMS) { | 254 } else if (requester == SYNCHRONOUS_HISTOGRAMS) { |
255 synchronous_sequence_number_ = last_used_sequence_number_; | 255 synchronous_sequence_number_ = last_used_sequence_number_; |
256 synchronous_renderers_pending_ = renderer_count; | 256 synchronous_renderers_pending_ = renderer_count; |
257 } | 257 } |
258 return last_used_sequence_number_; | 258 return last_used_sequence_number_; |
259 } | 259 } |
260 | 260 |
261 // static | 261 // static |
262 HistogramSynchronizer* HistogramSynchronizer::histogram_synchronizer_ = NULL; | 262 HistogramSynchronizer* HistogramSynchronizer::histogram_synchronizer_ = NULL; |
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