On 26 January 2011 12:12, Dave Martin <dave.mar...@linaro.org> wrote: > Hi Vijay, > > On Sat, Jan 22, 2011 at 9:59 AM, Vijay Kilari <vijay.kil...@gmail.com> wrote: >> Hello Dave, >> >> Thanks for this info. >> >> I have few more queries after looking at the results of memset on A9 & A8. >> I agree that externel bus speed matters in comparision across platforms. >> >> 1) Why memset is performance is good on A8 than A9?. any justification? > > I've CC'd the linaro-toolchain list who have been working on this > topic and may be able to provide you with more information.
Unfortunately we don't know why Neon was a bad idea for memset etc on A9, it's just the tests show it being worse and the advice we get says to avoid it - we've just not got an explanation. The test code is trivially simple for the cases I tried. Dave _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
