| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef METRICSD_COLLECTORS_CPU_USAGE_COLLECTOR_H_ |
| #define METRICSD_COLLECTORS_CPU_USAGE_COLLECTOR_H_ |
| |
| #include <base/time/time.h> |
| |
| #include "metrics/metrics_library.h" |
| |
| class CpuUsageCollector { |
| public: |
| CpuUsageCollector(MetricsLibraryInterface* metrics_library); |
| |
| // Initialize this collector's state. |
| void Init(); |
| |
| // Schedule a collection interval. |
| void Schedule(); |
| |
| // Callback called at the end of the collection interval. |
| void CollectCallback(); |
| |
| // Measure the cpu use and report it. |
| void Collect(); |
| |
| // Gets the current cumulated Cpu usage. |
| base::TimeDelta GetCumulativeCpuUse(); |
| |
| private: |
| FRIEND_TEST(CpuUsageTest, ParseProcStat); |
| bool ParseProcStat(const std::string& stat_content, |
| uint64_t *user_ticks, |
| uint64_t *user_nice_ticks, |
| uint64_t *system_ticks); |
| |
| int num_cpu_; |
| uint32_t ticks_per_second_; |
| |
| base::TimeDelta collect_interval_; |
| base::TimeDelta latest_cpu_use_; |
| |
| MetricsLibraryInterface* metrics_lib_; |
| }; |
| |
| #endif // METRICSD_COLLECTORS_CPU_USAGE_COLLECTOR_H_ |