[Bug string/25131] memcpy perfomance problem with ARM 32 A9be due to high cache-misses

["adhemerval.zanella at linaro dot org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=25131

--- Comment #9 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
On 25/11/2019 09:33, helugang at huawei dot com wrote:
> https://sourceware.org/bugzilla/show_bug.cgi?id=25131
> 
> --- Comment #8 from helugang <helugang at huawei dot com> ---
> (In reply to Adhemerval Zanella from comment #7)
>> (In reply to Florian Weimer from comment #6)
>>> The usual way we deal with this is to use some mechanism to probe for the
>>> platform in question and use an IFUNC handler to switch to the optimized
>>> version for this platform only.
>>>
>>> I'm not sure if 32-bit Arm platform variants can be identified easily at the
>>> CPU level or from the auxiliary vector. It may be necessary to do some
>>> kernel work first.
>>
>> Another option is to try to improve the generic armv7 implementation, the
>> main challenge is to create a strategy that does not regress on other chip
>> implementation.
>>
>> One option is to check if !USE_VFP code path (that does use PLD instruction)
>> yields any performance gain and check against at least some different chip
>> implementations.
> 
> First,than you for your reply.
> We have tried to use th
> 

I think your message was truncated somehow.

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