Download as PDF, PPTX
Uploaded byXavier Hallade
Power optimization for Android apps
The document discusses strategies for optimizing power consumption in Android applications, emphasizing the importance of understanding device components that impact battery life. It covers methods to improve app behavior through effective network and CPU usage, as well as tools for measuring power consumption like Battery Historian. The document provides practical advice for developers on managing resources and scheduling tasks to enhance battery efficiency.
More Related Content
Similar to Power optimization for Android apps
Power optimization for Android apps
- 1. PoweroptimizationforAndroidApps Xavier Hallade, DeveloperEvangelist, Intel Corporation @ph0b – ph0b.com – +XavierHallade
- 2. Power optimization forAndroid - Agenda Introduction Understanding power consumption Improving your app’s behavior Measuring power consumption Q&A
- 3.
- 4. Android devices Complex systemsrunning on battery – Display, Input devices, Sensors, Connectivity, Camera, CPU, GPU, RAM, Storage, A/V decoder, power subsystem Battery life is one of the main complaints from users Demand for more performance or less power consumption is driven by new use cases No one could apply Moore’s law to battery capacity yet…
- 5. Power Management –by the OS Specific applications lifecycle E.g. pausing applications not in foreground. Project Volta Doze Mode … but applications can always easily ruin the battery life of Android devices.
- 6. What is usingpower ? Network calls, data transfers Getting big chunks of data at random times, for data sync, analytics, ad networks… Location and sensors always-on, highest accuracy, maximum rate Inefficient code useless work, bad data structures… Display 45% Network 30% CPU 9% Other 16%
- 7.
- 8.
- 9. Optimizing network calls Allowfor OS timer coalescing Cache and prefetch Use HTTP persistent connections (HTTP 1.1+) Use compression Avoid polling. Don’t forget to close TCP sockets.
- 10. Letting the OSbatch network calls AlarmManager.set()/setInexactRepeating() + a pool of network requests SyncAdapter android.app.job.JobScheduler/JobInfo.Builder (21+) or GCMNetworkManager - setRequiresCharging, setRequiresIdle, setRequiredNetwork, setExecutionWindow… - setBackoffCriteria… use GCM push to trigger syncs only when actually needed
- 11. Prefetching and Caching Prefetchdata… but minimize the size of your data transfers Adapt to the type of connection Cache data: android.net.HttpResponseCache OkHttp …
- 12. Analyzing Network trafficfrom your application Android Network Monitor Charles Proxy AT&T Application Resource Optimizer
- 13. AT&T Application ResourceOptimizer
- 14.
- 15. Optimizing CPU usage Raceto idle Batch work Maximize data locality use efficient algorithms hardware acceleration Profile first !
- 16. Analyzing CPU usage- Traceview DDMS Method profiling or Debug.startMethodTracing("mytrace")
- 17. Intel® VTune Amplifier/ Energy Profiler • Gives exact information on CPU and GPU states and hardware interruptions • Part of Intel® System Studio • Needs a kernel module • Only possible on Intel development devices and Intel based consumer devices which support open source builds https://software.intel.com/en-us/intel-energy-profiler
- 18. Avoid useless work Disable receivers when not needed: Don’t forget to release Wakelocks Don’t trigger GPS fix, Bluetooth scan, etc “just in case” ComponentName receiver = new ComponentName(context, myReceiver.class); PackageManager pm = context.getPackageManager(); pm.setComponentEnabledSetting(receiver, PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP)
- 19. Optimizing sensors andother data use Sensors: set sampling to SENSOR_DELAY_NORMAL (200ms) or SENSOR_DELAY_UI (60ms). Prefer low power sensors when possible: accelerometer and no gyroscope GPS: use low accuracy (LocationManager.NETWORK_PROVIDER instead of LocationManager.GPS_PROVIDER) – Use high accuracy only once really needed.
- 20.
- 21. Battery Historian 1.0 Asimple python script generating a HTML report, no readme. adb shell dumpsys batterystats --enable full-wake-history adb shell dumpsys batterystats --reset # use your device for some time adb bugreport > bugreport.txt ./historian.py bugreport.txt > historian_report.html
- 22. Battery Historian 2.0 Dependencyon: Go, Python, Git, Closure compiler, internet connection… local webserver Guide to install it on Windows: http://ph0b.com/battery-historian-2-0-windows/ adb shell dumpsys batterystats --enable full-wake-history adb shell dumpsys batterystats --reset # use your device for some time adb bugreport > bugreport.txt
- 23.
- 24.
- 25.
- 26. Summary Power optimization ontypical Android devices requires understanding of power consumption of all components Batch, cache, avoid network requests and CPU work, optimize and schedule it properly. Measure and analyze your app using software tools: https://github.com/google/battery-historian http://intel.ly/system-studio Additional Resources: Android Performance Patterns Videos http://bit.ly/1KDLqUu
- 27. Thankyou! xavier.hallade@intel.com @ph0b – ph0b.com– +XavierHallade