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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 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 #ifndef CHROME_BROWSER_CHROMEOS_RESOURCE_REPORTER_RESOURCE_REPORTER_H_ | 5 #ifndef CHROME_BROWSER_CHROMEOS_RESOURCE_REPORTER_RESOURCE_REPORTER_H_ |
6 #define CHROME_BROWSER_CHROMEOS_RESOURCE_REPORTER_RESOURCE_REPORTER_H_ | 6 #define CHROME_BROWSER_CHROMEOS_RESOURCE_REPORTER_RESOURCE_REPORTER_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 #include <stdint.h> | 9 #include <stdint.h> |
10 | 10 |
11 #include <string> | 11 #include <string> |
12 #include <vector> | 12 #include <vector> |
13 | 13 |
14 #include "base/gtest_prod_util.h" | 14 #include "base/gtest_prod_util.h" |
15 #include "base/macros.h" | 15 #include "base/macros.h" |
| 16 #include "base/memory/memory_coordinator_client.h" |
16 #include "base/memory/memory_pressure_listener.h" | 17 #include "base/memory/memory_pressure_listener.h" |
17 #include "base/memory/singleton.h" | 18 #include "base/memory/singleton.h" |
18 #include "chrome/browser/task_manager/task_manager_observer.h" | 19 #include "chrome/browser/task_manager/task_manager_observer.h" |
19 #include "components/metrics/metrics_service.h" | 20 #include "components/metrics/metrics_service.h" |
20 #include "components/prefs/pref_registry_simple.h" | 21 #include "components/prefs/pref_registry_simple.h" |
21 #include "components/rappor/sample.h" | 22 #include "components/rappor/sample.h" |
22 | 23 |
23 namespace chromeos { | 24 namespace chromeos { |
24 | 25 |
25 // A system that tracks the top |kTopConsumersCount| CPU and memory consumer | 26 // A system that tracks the top |kTopConsumersCount| CPU and memory consumer |
26 // Chrome tasks and reports a weighted random sample of them via Rappor whenever | 27 // Chrome tasks and reports a weighted random sample of them via Rappor whenever |
27 // memory pressure is critical. The reporting is limited to once per | 28 // memory pressure is critical. The reporting is limited to once per |
28 // |kMinimumTimeBetweenReportsInMS|. | 29 // |kMinimumTimeBetweenReportsInMS|. |
29 class ResourceReporter : public task_manager::TaskManagerObserver { | 30 class ResourceReporter : public task_manager::TaskManagerObserver, |
| 31 public base::MemoryCoordinatorClient { |
30 public: | 32 public: |
31 // A collection of the data of a task manager's task that the ResourceReporter | 33 // A collection of the data of a task manager's task that the ResourceReporter |
32 // is interested in. | 34 // is interested in. |
33 struct TaskRecord { | 35 struct TaskRecord { |
34 explicit TaskRecord(task_manager::TaskId task_id); | 36 explicit TaskRecord(task_manager::TaskId task_id); |
35 | 37 |
36 TaskRecord(task_manager::TaskId task_id, | 38 TaskRecord(task_manager::TaskId task_id, |
37 const std::string& task_name, | 39 const std::string& task_name, |
38 double cpu_percent, | 40 double cpu_percent, |
39 int64_t memory_bytes, | 41 int64_t memory_bytes, |
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142 const TaskRecord& task_record); | 144 const TaskRecord& task_record); |
143 | 145 |
144 // Gets the CPU/memory usage ranges given the |cpu| / |memory_in_bytes| | 146 // Gets the CPU/memory usage ranges given the |cpu| / |memory_in_bytes| |
145 // values. | 147 // values. |
146 static CpuUsageRange GetCpuUsageRange(double cpu); | 148 static CpuUsageRange GetCpuUsageRange(double cpu); |
147 static MemoryUsageRange GetMemoryUsageRange(int64_t memory_in_bytes); | 149 static MemoryUsageRange GetMemoryUsageRange(int64_t memory_in_bytes); |
148 | 150 |
149 // Gets the bucket in which the current system's number of CPU cores fall. | 151 // Gets the bucket in which the current system's number of CPU cores fall. |
150 static CpuCoresNumberRange GetCurrentSystemCpuCoresRange(); | 152 static CpuCoresNumberRange GetCurrentSystemCpuCoresRange(); |
151 | 153 |
| 154 // base::MemoryCoordinatorClient: |
| 155 void OnMemoryStateChange(base::MemoryState state) override; |
| 156 |
152 // Perform a weighted random sampling to select a task by its CPU or memory | 157 // Perform a weighted random sampling to select a task by its CPU or memory |
153 // usage weights so that we can record samples for them via Rappor. | 158 // usage weights so that we can record samples for them via Rappor. |
154 // They return nullptr if no TaskRecord has been selected. | 159 // They return nullptr if no TaskRecord has been selected. |
155 const TaskRecord* SampleTaskByCpu() const; | 160 const TaskRecord* SampleTaskByCpu() const; |
156 const TaskRecord* SampleTaskByMemory() const; | 161 const TaskRecord* SampleTaskByMemory() const; |
157 | 162 |
158 // Does the actual recording of Rappor and UMA samples. | 163 // Does the actual recording of Rappor and UMA samples. |
159 void ReportSamples(); | 164 void ReportSamples(); |
160 | 165 |
161 // The callback function that will be invoked on memory pressure events. | 166 // The callback function that will be invoked on memory pressure events. |
162 using MemoryPressureLevel = base::MemoryPressureListener::MemoryPressureLevel; | 167 using MemoryPressureLevel = base::MemoryPressureListener::MemoryPressureLevel; |
163 void OnMemoryPressure(MemoryPressureLevel memory_pressure_level); | 168 void OnMemoryPressure(MemoryPressureLevel memory_pressure_level); |
164 | 169 |
| 170 void StartRecordingCurrentState(); |
| 171 void StopRecordingCurrentState(); |
| 172 |
165 // Monitor memory pressure events. | 173 // Monitor memory pressure events. |
166 std::unique_ptr<base::MemoryPressureListener> memory_pressure_listener_; | 174 std::unique_ptr<base::MemoryPressureListener> memory_pressure_listener_; |
167 | 175 |
168 // Contains the data about the most CPU and memory intensive tasks collected | 176 // Contains the data about the most CPU and memory intensive tasks collected |
169 // at a critical memory pressure event. | 177 // at a critical memory pressure event. |
170 std::vector<TaskRecord> task_records_; | 178 std::vector<TaskRecord> task_records_; |
171 | 179 |
172 // Either the real task manager implementation, or a test implementation in | 180 // Either the real task manager implementation, or a test implementation in |
173 // unit tests. | 181 // unit tests. |
174 task_manager::TaskManagerInterface* task_manager_to_observe_; | 182 task_manager::TaskManagerInterface* task_manager_to_observe_; |
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185 | 193 |
186 // Tracks whether monitoring started or not. | 194 // Tracks whether monitoring started or not. |
187 bool is_monitoring_; | 195 bool is_monitoring_; |
188 | 196 |
189 DISALLOW_COPY_AND_ASSIGN(ResourceReporter); | 197 DISALLOW_COPY_AND_ASSIGN(ResourceReporter); |
190 }; | 198 }; |
191 | 199 |
192 } // namespace chromeos | 200 } // namespace chromeos |
193 | 201 |
194 #endif // CHROME_BROWSER_CHROMEOS_RESOURCE_REPORTER_RESOURCE_REPORTER_H_ | 202 #endif // CHROME_BROWSER_CHROMEOS_RESOURCE_REPORTER_RESOURCE_REPORTER_H_ |
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