| /* |
| * Copyright (C) 2016 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 PERFD_CPU_CPU_COLLECTOR_H_ |
| #define PERFD_CPU_CPU_COLLECTOR_H_ |
| |
| #include <atomic> |
| #include <cstdint> |
| #include <thread> |
| |
| #include "perfd/cpu/cpu_usage_sampler.h" |
| #include "perfd/cpu/thread_monitor.h" |
| |
| namespace profiler { |
| |
| class CpuCollector { |
| public: |
| // Creates a collector that will invoke |usage_sampler| and |thread_monitor| |
| // every |interval_in_us| microseconds. |
| CpuCollector(int64_t interval_in_us, CpuUsageSampler* usage_sampler, |
| ThreadMonitor* thread_monitor) |
| : usage_sampler_(*usage_sampler), |
| thread_monitor_(*thread_monitor), |
| sampling_interval_in_us_(interval_in_us) {} |
| |
| ~CpuCollector(); |
| |
| // Creates a thread that collects and saves data continually. |
| // Assumes |Start()| and |Stop()| are called by the same thread. |
| void Start(); |
| |
| // Stops collecting data and wait for thread exit. |
| // Assumes |Start()| and |Stop()| are called by the same thread. |
| void Stop(); |
| |
| private: |
| // Collects and saves CPU sampling data continually. |
| void Collect(); |
| |
| // Thread that sampling operations run on. |
| std::thread sampler_thread_; |
| // True if sampling operations is running. |
| std::atomic_bool is_running_{false}; |
| // Holder of sampler operations. |
| CpuUsageSampler& usage_sampler_; |
| // Monitor of thread activities. |
| ThreadMonitor& thread_monitor_; |
| // Sampling window size in microseconds. |
| int64_t sampling_interval_in_us_; |
| }; |
| |
| } // namespace profiler |
| |
| #endif // PERFD_CPU_CPU_COLLECTOR_H_ |