Understanding Android Benchmarks “freedom” koan-sin tan
[email protected] OSDC.tw, Taipei Apr 11th, 2014 1 disclaimers • many of the materials used in this slide deck are from the Internet and textbooks, e.g., many of the following materials are from “Computer Architecture: A Quantitative Approach,” 1st ~ 5th ed • opinions expressed here are my personal one, don’t reflect my employer’s view 2 who am i • did some networking and security research before • working for a SoC company, recently on • big.LITTLE scheduling and related stuff • parallel construct evaluation • run benchmarking from time to time • for improving performance of our products, and • know what our colleagues' progress 3 • Focusing on CPU and memory parts of benchmarks • let’s ignore graphics (2d, 3d), storage I/O, etc. 4 Blackbox ! • google image search “benchmark”, you can find many of them are Android-related benchmarks • Similar to recently Cross-Strait Trade in Services Agreement (TiSA), most benchmarks on Android platform are kinda blackbox 5 Is Apple A7 good? • When Apple released the new iPhone 5s, you saw many technical blog showed some benchmarks for reviews they came up • commonly used ones: • GeekBench • JavaScript benchmarks • Some graphics benchmarks • Why? Are they right ones? etc. e.g., http://www.anandtech.com/show/7335/the-iphone-5s-review 6 open blackbox 7 Android Benchmarks 8 http:// www.anandtech.com /show/7384/state-of- cheating-in-android- benchmarks No, not improvement in this way 9 Assuming there is not cheating, what we we can do? Outline • Performance benchmark review • Some Android benchmarks • What we did and what still can be done • Future 11 To quote what Prof.