LCE13: How to make Android more efficient

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Resource: LCE13
Name: How to make Android more efficient
Date: 08-07-2013
Speaker: khasim Mohammed
Video: https://www.youtube.com/watch?v=FyEi68j7hV0

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  • 1. Group photograph at Linaro Connect in Copenhagen Monday 29 Oct 2012 How to make Android MORE Efficient for entry level products ? Khasim Syed Mohammed Tech Lead - Android Engineering Team
  • 2. BUZZ around entry level products Samsung announces the Galaxy Ace 3, its new entry-level Android smartphone with an LTE option From the online Media
  • 3. Scope - Related but different issues We "don't want" to focus on these, l Another problem that Android is yet to solve is the pace of hardware feeling obsolete. An upgrade to latest software affects the performance and slowly the device gets obsolete in just few months from launch. l Some times even brand new devices typically fail to launch with the latest version of Android due to multiple reasons across the service providers, manufacturers, silicon vendors and Google. l Upgrades not available for every model
  • 4. What do we mean by "more efficient" ? Should the low end smartphone support all the latest features of Android JB or latest Image: http://www.spicestellar.com/wp-content/uploads/2013/01/Jelly-Bean-Infographic-819x1024.jpg
  • 5. Basic features expected from a low end smartphoneApart from the fundamental phone call & messaging other expectations are: l ability to access the Internet through a browser l ability to access digital media (video, audio, images) l ability to record audio / video and capture images / scan codes l ability to upload media on cloud, use social media apps and share the content instantly. l ability to track current location using GPS, leverage maps & location specific services and apps l ability to access a repository of thousands of apps (play / market) l ability to have access to e-mail while on the move l ability to download latest 3D accelerated games and play offline l ability to use application specific input peripherals like Keys, multi-touch screen, accelerometer, sensors, etc. l ability to communicate with other devices over Bluetooth, NFC, WiFi.
  • 6. Hardware specification Low End High end or Latest DISPLAY TFT capacitive touchscreen, 256K colors LED, capacitive touchscreen, 16M colors 320 x 480 pixels, 3.5 inches (~165 ppi pixel density) – 800x480 is also becoming std. 1080 x 1920 pixels, 5.0 inches (~441 ppi pixel density) Memory RAM 512 MB 2 GB CPU 1 GHz QuadCore 1.9 GHz and above DATA Speed HSDPA 7.2 Mbps HSDPA 42.2Mbps CAMERA 5 MP, 2592х1944 pixels 13 MP, 4128 x 3096 pixels VGA@25fps 1080p@30fps, dual-video rec. Yes, VGA Yes, 2 MP,1080p@30fps, dual video call 3D Graphics 300MHz 19.2 GFLOPS (approx) 533MHz, 51.1 GFLOPS (approx) Video Playback WVGA (800 x 480) Full HD (1080p) Recording up to 25fps, Decoding up to 30fps Full HD (1080p) BATTERY Li-Ion 1300 mAh battery Li-Ion 2600 mAh battery While there are many differences, the below table captures only that are relevant and important
  • 7. How to make Android more efficient for entry level products and improve the overall Android experience ... ? Exploring and Optimizing Optimizing applications like browsers, email, SMS, media players don't solve the problem generically and users have multiple choices for each of these apps and they generally don't stick with one. Therefore, we have to focus on finding and addressing common frameworks.
  • 8. We have identified the top 10 areas to work on to make Android efficient for entry level products : 1. Fix the Janky lAndroid is still too often "janky," meaning that changes on the screen stutter or pause instead of moving smoothly. lMost of these are due to high resolution with limited processing power, limited processing power of 3D accelerator or limited memory availability and so on. 2. Reduce Data consumption lBrowsers, Email clients, SMS, Instant chat and many other applications transfer data to/from internet. lThe additional data required (not the payload) can be reduced and hence the consumption. This will help in quick page loads and fast transfers, reduced data usage for mobile users. lMore details in this report: Smartphone Efficiency Report - Rysavy Research 3. Optimize input event handlers for better responses lUser experience depends a lot on the device response, meaning – the instant we input through keypad or touch and the time taken to get visible response, if the response time is more then UI experience is bad and vice versa. lThere are multiple input devices like Touch, keypad, accelerometer, sensors, etc where in event handler can be tuned to achieve best possible response. Compilation of iDeas :-
  • 9. 4. Upgrade the frameworks to leverage VFP v4 and NEON lARM Cortex A7 & A15 introduces the latest versions of VFP v4 and NEON lAndroid frameworks (Dalvik, V8 Java script, etc) can be optimized to leverage these units. lhttp://infocenter.arm.com/help/topic/com.arm.doc.ddi0462d/DDI0462D_cortex_a7_neon_mpe_r0p3_trm.pdf 5. Optimize memory utilization and accesses lFree up the storage space on the device to improve the performance by cleaning up unused apps & files, cleaning app cache, recycle the memory when the app gets closed, etc – as examples. 6. Effectively use Open MP in Android lWith ARM Cortex A7 multi-core being used in almost every entry level product it is kind of important to consider OpenMP APIs to leverage the multi-core parallel processing. 7. Improve Battery management lProfile the power utilization for various applications, target the top few (social, media, games) apps to begin with. lFind the rootcause if it's connectivity, need for more CPU bandwidth, memory access for logging, etc. Compilation of iDeas :-
  • 10. More of SOC / chipset / platform specific 8. Power optimizations for Audio playback lImprove continuous Audio playback and reduce draining of battery. lGenerally Mediaserver drains battery very quickly. 9. Power optimizations for Video playback lImprove continuous Video playback and reduce draining of battery. lGenerally Mediaserver drains battery very quickly 10. Improve network throughput mainly for 3G data transfers lImprove or boost the network signal and optimize the network stack to achieve better network throughput. Compilation of iDeas :-
  • 11. Next steps - Plan lReview the ideas presented with engineers across the teams and organizations at LCE 13 – end of this week lComplete the feasibility study & implementation / design – by end of July 2013 lEstimate the effort required and pushing the same to AOSP – by mid August 2013 lFormal presentation to TSC with resource & effort estimate – by end of August 2013 lImplementation begins with low hanging first – by September 2013
  • 12. Thank you & Let's work together Register to participate or to get latest updates linaro-android@lists.linaro.org