Hi Jason. There's a couple of different things going on here. The Toolchain Working Group, which I am a part of, is working on both 4.4 and 4.5 based versions of GCC. We want the Linaro version to be 'the toolchain for ARM', as in the one that people first go to when thinking about an ARM project.
The 4.4 version is being used by Ubuntu as their default compiler. The 4.5 version is where the new work and performance improvements will go. Both are focused on the Cortex-A series and have Thumb2, NEON, and Cortex-A specific optimisations. We will also be be supplying a standard cross-compiler builds that can be installed on your Ubuntu based host machine.
Regarding benchmarks, I'd recommend you wait a week for our next release and give it a try on your actual code. We're very interested in any feedback and any performance regressions compared to earlier versions.
Hope that helps,
-- Michael
The best benchmark to try On Mon, Aug 9, 2010 at 11:41 PM, Liu Hui-R64343 r64343@freescale.com wrote:
Hi, Linaoer,
I'm one SW engineer named Jason Liu from Freescale. I noticed that there are some discussion about the arm-cross-toolchain. I want to know the following:
What cross-tool chain will Linaro use? What's the version number? Will it enable ARM-V7 support? Will it enalbe NEON support? What's the improvement for the memcpy function? What I'm asking this question due to that we meet the peformance drop when we upgrade gcc version from 4.1.2 to higher version.
Thanks.
BR, Jason
-----Original Message----- From: linaro-dev-bounces@lists.linaro.org [mailto:linaro-dev-bounces@lists.linaro.org] On Behalf Of Marcin Juszkiewicz Sent: Tuesday, July 20, 2010 12:00 PM To: linaro-dev@lists.linaro.org Subject: Re: [Linaro-dev] Maverick cross toolchain
2010.07.20
updated gcc-4.4 to 4.4.4-7ubuntu1 and fixed dependencies of some packages updated gcc-4.5 to 4.5.0-8ubuntu1 and fixed dependencies of some packages updated binutils to 2.20.51.20100710-1ubuntu2 and reverted sysroot change updated ARM libraries to latest versions
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