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


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

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