On Thu, Aug 04, 2011 at 12:03:00PM -0700, Taras Glek wrote: > Recently we have been looking at how to squeeze more performance out > of our toolchain for building Firefox on Android. Mike Hommey > integrated GCC 4.6 into the android NDK and has been testing > performance (with mixed results > http://gcc.gnu.org/ml/gcc/2011-08/msg00096.html).
You should definitely be trying to build using the Linaro 4.5 and 4.6 compiler branches; they are pretty much guaranteed to give you better performance, and if they don't, we're on the hook to fix it quickly! All the patches go upstream, so there is no risk of you being stuck on a fork -- it just makes everything you need available right now. I'm copying the linaro-toolchain list to make sure that you get the right people's attention (though if they weren't all coming back from Connect in Cambridge this week they would have picked the email up already). > I like how Linaro is doing regular arm benchmarking, ie > https://wiki.linaro.org/Platform/Android/AndroidToolchainBenchmarking/2011-07 We do much more than that, but it's not as easy to find right now; for instance http://ex.seabright.co.nz/helpers/benchcompare is Michael's regular release benchmark. > . Would you be interested in adding a Firefox-based benchmark? As a > large application it is a good testbed for LTO, FDO and other > aggressive optimizations. Totally. Let's do it. Can you give me an idea of what boards you are testing the build on today? Do you have a test suite that we could run in a reasonable timeframe (hours, not days)? > We are also looking at setting a developer-friendly android ROM with > oprofile, perf, systemtap, gdb, debug symbols, etc. It might even be > beneficial for us to use newer kernels as we exlore options like > kernel-assisted ld.so relocations, etc. That seems to similar to > what Linaro provides in the evaluation ROMS. Is there any chance of > Linaro providing developer-friendly "evaluation" ROMs for retail > phones like the Nexus S? It's indeed pretty similar (we just call them LEBs), and Zach will be really interested in working with you on this. As for supporting actual released phones, it lies somewhat outside of our optimal operating model, and we don't have any hardware available. I guess we could do a spin for a specific model if we had enough of them to use by a set of engineers in the different teams. They are so expensive, though. Do you guys have lots of them? -- Christian Robottom Reis, Engineering VP Brazil (GMT-3) | [+55] 16 9112 6430 | [+1] 612 216 4935 Linaro.org: Open Source Software for ARM SoCs _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
