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Re: [PATCH] sysdeps/arm/armv7/multiarch/memcpy_impl.S: Improve performance.
- From: "Carlos O'Donell" <carlos at redhat dot com>
- To: Will Newton <will dot newton at linaro dot org>
- Cc: libc-ports at sourceware dot org, Patch Tracking <patches at linaro dot org>
- Date: Fri, 30 Aug 2013 13:14:51 -0400
- Subject: Re: [PATCH] sysdeps/arm/armv7/multiarch/memcpy_impl.S: Improve performance.
- Authentication-results: sourceware.org; auth=none
- References: <520894D5 dot 7060207 at linaro dot org> <CANu=DmiBHoymFKTvaW_VsdhWZEYwkfViz1tTeRgj7H80f0FntA at mail dot gmail dot com>
On 08/27/2013 03:46 AM, Will Newton wrote:
> On 12 August 2013 08:55, Will Newton <will.newton@linaro.org> wrote:
>>
>> A small change to the entry to the aligned copy loop improves
>> performance slightly on A9 and A15 cores for certain copies.
>>
>> ports/ChangeLog.arm:
>>
>> 2013-08-07 Will Newton <will.newton@linaro.org>
>>
>> * sysdeps/arm/armv7/multiarch/memcpy_impl.S: Tighten check
>> on entry to aligned copy loop for improved performance.
>> ---
>> ports/sysdeps/arm/armv7/multiarch/memcpy_impl.S | 4 ++--
>> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> Ping?
How did you test the performance?
glibc has a performance microbenchmark, did you use that?
Cheers,
Carlos.