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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 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 "components/arc/metrics/oom_kills_monitor.h" | 5 #include "components/arc/metrics/oom_kills_monitor.h" |
6 | 6 |
7 #include <errno.h> | 7 #include <errno.h> |
8 #include <fcntl.h> | 8 #include <fcntl.h> |
9 #include <stdio.h> | 9 #include <stdio.h> |
10 | 10 |
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26 #include "third_party/re2/src/re2/re2.h" | 26 #include "third_party/re2/src/re2/re2.h" |
27 #include "third_party/re2/src/re2/stringpiece.h" | 27 #include "third_party/re2/src/re2/stringpiece.h" |
28 | 28 |
29 namespace arc { | 29 namespace arc { |
30 | 30 |
31 using base::StringPiece; | 31 using base::StringPiece; |
32 | 32 |
33 using base::SequencedWorkerPool; | 33 using base::SequencedWorkerPool; |
34 using base::TimeDelta; | 34 using base::TimeDelta; |
35 | 35 |
36 OomKillsMonitor::OomKillsMonitor() | 36 namespace { |
37 : worker_pool_( | |
38 new SequencedWorkerPool(1, "oom_kills_monitor")) {} | |
39 | 37 |
40 OomKillsMonitor::~OomKillsMonitor() { | 38 base::LazyInstance<OomKillsMonitor>::Leaky g_instance = |
41 Stop(); | 39 LAZY_INSTANCE_INITIALIZER; |
42 } | |
43 | |
44 void OomKillsMonitor::Start() { | |
45 auto task_runner = worker_pool_->GetTaskRunnerWithShutdownBehavior( | |
46 SequencedWorkerPool::CONTINUE_ON_SHUTDOWN); | |
47 task_runner->PostTask( | |
48 FROM_HERE, base::Bind(&OomKillsMonitor::Run, worker_pool_)); | |
49 } | |
50 | |
51 void OomKillsMonitor::Stop() { | |
52 worker_pool_->Shutdown(); | |
53 } | |
54 | |
55 namespace { | |
56 | 40 |
57 int64_t GetTimestamp(const StringPiece& line) { | 41 int64_t GetTimestamp(const StringPiece& line) { |
58 std::vector<StringPiece> fields = base::SplitStringPiece( | 42 std::vector<StringPiece> fields = base::SplitStringPiece( |
59 line, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL); | 43 line, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL); |
60 | 44 |
61 int64_t timestamp = -1; | 45 int64_t timestamp = -1; |
62 // Timestamp is the third field in a line of /dev/kmsg. | 46 // Timestamp is the third field in a line of /dev/kmsg. |
63 if (fields.size() < 3 || !base::StringToInt64(fields[2], ×tamp)) | 47 if (fields.size() < 3 || !base::StringToInt64(fields[2], ×tamp)) |
64 return -1; | 48 return -1; |
65 return timestamp; | 49 return timestamp; |
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147 | 131 |
148 if (GetTimeDelta(line, &last_timestamp, &time_delta)) { | 132 if (GetTimeDelta(line, &last_timestamp, &time_delta)) { |
149 UMA_HISTOGRAM_OOM_KILL_TIME_INTERVAL( | 133 UMA_HISTOGRAM_OOM_KILL_TIME_INTERVAL( |
150 "Arc.LowMemoryKiller.TimeDelta", time_delta); | 134 "Arc.LowMemoryKiller.TimeDelta", time_delta); |
151 } | 135 } |
152 } | 136 } |
153 } | 137 } |
154 | 138 |
155 } // namespace | 139 } // namespace |
156 | 140 |
141 OomKillsMonitor::OomKillsMonitorHandle::OomKillsMonitorHandle( | |
142 OomKillsMonitor* outer) : outer_(outer) { DCHECK(outer_); } | |
143 | |
144 OomKillsMonitor::OomKillsMonitorHandle::~OomKillsMonitorHandle() { | |
145 outer_->is_shutting_down_.Set(); | |
146 } | |
147 | |
148 OomKillsMonitor::OomKillsMonitor() | |
149 : worker_thread_("oom_kills_monitor") {} | |
150 | |
157 // static | 151 // static |
158 void OomKillsMonitor::Run( | 152 void OomKillsMonitor::StartMonitoring() { |
159 scoped_refptr<base::SequencedWorkerPool> worker_pool) { | 153 OomKillsMonitor* instance = g_instance.Pointer(); |
154 | |
155 DCHECK(!instance->IsRunning()); | |
156 | |
157 base::Thread::Options thread_options; | |
158 thread_options.joinable = false; | |
159 instance->StartWithOptions(thread_options); | |
160 } | |
Luis Héctor Chávez
2016/08/01 15:48:14
return OomKillsMonitorHandle(instance); ?
gab
2016/08/04 22:42:36
Yea I was trying to do this on my Windows machine.
| |
161 | |
162 void OomKillsMonitor::Run() { | |
160 base::ScopedFILE kmsg_handle( | 163 base::ScopedFILE kmsg_handle( |
161 base::OpenFile(base::FilePath("/dev/kmsg"), "r")); | 164 base::OpenFile(base::FilePath("/dev/kmsg"), "r")); |
162 if (!kmsg_handle) { | 165 if (!kmsg_handle) { |
163 LOG(WARNING) << "Open /dev/kmsg failed: " << base::safe_strerror(errno); | 166 LOG(WARNING) << "Open /dev/kmsg failed: " << base::safe_strerror(errno); |
164 return; | 167 return; |
165 } | 168 } |
166 // Skip kernel messages prior to the instantiation of this object to avoid | 169 // Skip kernel messages prior to the instantiation of this object to avoid |
167 // double reporting. | 170 // double reporting. |
168 fseek(kmsg_handle.get(), 0, SEEK_END); | 171 fseek(kmsg_handle.get(), 0, SEEK_END); |
169 | 172 |
170 static const int kMaxBufSize = 512; | 173 static const int kMaxBufSize = 512; |
171 char buf[kMaxBufSize]; | 174 char buf[kMaxBufSize]; |
172 | 175 |
173 while (fgets(buf, kMaxBufSize, kmsg_handle.get())) { | 176 while (fgets(buf, kMaxBufSize, kmsg_handle.get())) { |
174 if (worker_pool->IsShutdownInProgress()) { | 177 if (is_shutting_down_.IsSet()) { |
175 DVLOG(1) << "Chrome is shutting down, exit now."; | 178 DVLOG(1) << "Chrome is shutting down, exit now."; |
176 break; | 179 break; |
177 } | 180 } |
178 const StringPiece buf_string(buf); | 181 const StringPiece buf_string(buf); |
179 LogOOMKill(buf_string); | 182 LogOOMKill(buf_string); |
180 LogLowMemoryKill(buf_string); | 183 LogLowMemoryKill(buf_string); |
181 } | 184 } |
182 } | 185 } |
183 | 186 |
184 } // namespace arc | 187 } // namespace arc |
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