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| 1 // Copyright 2013 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 "base/debug/trace_event_system_stats_monitor.h" | |
| 6 | |
| 7 #include "base/debug/leak_annotations.h" | |
| 8 #include "base/debug/trace_event.h" | |
| 9 #include "base/json/json_writer.h" | |
| 10 #include "base/lazy_instance.h" | |
| 11 #include "base/logging.h" | |
| 12 #include "base/memory/scoped_ptr.h" | |
| 13 #include "base/strings/string_number_conversions.h" | |
| 14 #include "base/strings/string_util.h" | |
| 15 #include "base/thread_task_runner_handle.h" | |
| 16 #include "base/threading/thread_local_storage.h" | |
| 17 | |
| 18 namespace base { | |
| 19 namespace debug { | |
| 20 | |
| 21 namespace { | |
| 22 | |
| 23 ///////////////////////////////////////////////////////////////////////////// | |
| 24 // Holds profiled system stats until the tracing system needs to serialize it. | |
| 25 class SystemStatsHolder : public base::debug::ConvertableToTraceFormat { | |
| 26 public: | |
| 27 SystemStatsHolder() { } | |
| 28 | |
| 29 // Fills system_metrics_ with profiled system memory and disk stats. | |
| 30 // Uses the previous stats to compute rates if this is not the first profile. | |
| 31 void GetSystemProfilingStats(); | |
| 32 | |
| 33 // base::debug::ConvertableToTraceFormat overrides: | |
| 34 void AppendAsTraceFormat(std::string* out) const override { | |
| 35 AppendSystemProfileAsTraceFormat(system_stats_, out); | |
| 36 } | |
| 37 | |
| 38 private: | |
| 39 ~SystemStatsHolder() override {} | |
| 40 | |
| 41 SystemMetrics system_stats_; | |
| 42 | |
| 43 DISALLOW_COPY_AND_ASSIGN(SystemStatsHolder); | |
| 44 }; | |
| 45 | |
| 46 void SystemStatsHolder::GetSystemProfilingStats() { | |
| 47 system_stats_ = SystemMetrics::Sample(); | |
| 48 } | |
| 49 | |
| 50 } // namespace | |
| 51 | |
| 52 ////////////////////////////////////////////////////////////////////////////// | |
| 53 | |
| 54 TraceEventSystemStatsMonitor::TraceEventSystemStatsMonitor( | |
| 55 scoped_refptr<SingleThreadTaskRunner> task_runner) | |
| 56 : task_runner_(task_runner), | |
| 57 weak_factory_(this) { | |
| 58 // Force the "system_stats" category to show up in the trace viewer. | |
| 59 TraceLog::GetCategoryGroupEnabled(TRACE_DISABLED_BY_DEFAULT("system_stats")); | |
| 60 | |
| 61 // Allow this to be instantiated on unsupported platforms, but don't run. | |
| 62 TraceLog::GetInstance()->AddEnabledStateObserver(this); | |
| 63 } | |
| 64 | |
| 65 TraceEventSystemStatsMonitor::~TraceEventSystemStatsMonitor() { | |
| 66 if (dump_timer_.IsRunning()) | |
| 67 StopProfiling(); | |
| 68 TraceLog::GetInstance()->RemoveEnabledStateObserver(this); | |
| 69 } | |
| 70 | |
| 71 void TraceEventSystemStatsMonitor::OnTraceLogEnabled() { | |
| 72 // Check to see if system tracing is enabled. | |
| 73 bool enabled; | |
| 74 | |
| 75 TRACE_EVENT_CATEGORY_GROUP_ENABLED(TRACE_DISABLED_BY_DEFAULT( | |
| 76 "system_stats"), &enabled); | |
| 77 if (!enabled) | |
| 78 return; | |
| 79 task_runner_->PostTask( | |
| 80 FROM_HERE, | |
| 81 base::Bind(&TraceEventSystemStatsMonitor::StartProfiling, | |
| 82 weak_factory_.GetWeakPtr())); | |
| 83 } | |
| 84 | |
| 85 void TraceEventSystemStatsMonitor::OnTraceLogDisabled() { | |
| 86 task_runner_->PostTask( | |
| 87 FROM_HERE, | |
| 88 base::Bind(&TraceEventSystemStatsMonitor::StopProfiling, | |
| 89 weak_factory_.GetWeakPtr())); | |
| 90 } | |
| 91 | |
| 92 void TraceEventSystemStatsMonitor::StartProfiling() { | |
| 93 // Watch for the tracing framework sending enabling more than once. | |
| 94 if (dump_timer_.IsRunning()) | |
| 95 return; | |
| 96 | |
| 97 dump_timer_.Start(FROM_HERE, | |
| 98 TimeDelta::FromMilliseconds(TraceEventSystemStatsMonitor:: | |
| 99 kSamplingIntervalMilliseconds), | |
| 100 base::Bind(&TraceEventSystemStatsMonitor:: | |
| 101 DumpSystemStats, | |
| 102 weak_factory_.GetWeakPtr())); | |
| 103 } | |
| 104 | |
| 105 // If system tracing is enabled, dumps a profile to the tracing system. | |
| 106 void TraceEventSystemStatsMonitor::DumpSystemStats() { | |
| 107 scoped_refptr<SystemStatsHolder> dump_holder = new SystemStatsHolder(); | |
| 108 dump_holder->GetSystemProfilingStats(); | |
| 109 | |
| 110 TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID( | |
| 111 TRACE_DISABLED_BY_DEFAULT("system_stats"), | |
| 112 "base::TraceEventSystemStatsMonitor::SystemStats", | |
| 113 this, | |
| 114 scoped_refptr<ConvertableToTraceFormat>(dump_holder)); | |
| 115 } | |
| 116 | |
| 117 void TraceEventSystemStatsMonitor::StopProfiling() { | |
| 118 dump_timer_.Stop(); | |
| 119 } | |
| 120 | |
| 121 bool TraceEventSystemStatsMonitor::IsTimerRunningForTest() const { | |
| 122 return dump_timer_.IsRunning(); | |
| 123 } | |
| 124 | |
| 125 void AppendSystemProfileAsTraceFormat(const SystemMetrics& system_metrics, | |
| 126 std::string* output) { | |
| 127 std::string tmp; | |
| 128 base::JSONWriter::Write(system_metrics.ToValue().get(), &tmp); | |
| 129 *output += tmp; | |
| 130 } | |
| 131 | |
| 132 } // namespace debug | |
| 133 } // namespace base | |
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Chromium Code Reviews
Issue 885443002:
Roll Chrome into Mojo. (Closed)
Base URL: https://github.com/domokit/mojo.git@master