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RE: [PATCH] x86_64: memcpy/memmove family optimized with AVX512
- From: "Senkevich, Andrew" <andrew dot senkevich at intel dot com>
- To: Adhemerval Zanella <adhemerval dot zanella at linaro dot org>
- Cc: "libc-alpha at sourceware dot org" <libc-alpha at sourceware dot org>
- Date: Fri, 15 Jan 2016 22:02:40 +0000
- Subject: RE: [PATCH] x86_64: memcpy/memmove family optimized with AVX512
- Authentication-results: sourceware.org; auth=none
- References: <569698C4 dot 5060506 at linaro dot org>
> On 13-01-2016 16:10, Senkevich, Andrew wrote:
>>> On 12-01-2016 12:13, Andrew Senkevich wrote:
>>>> Hi,
>>>>
>>>> here is AVX512 implementations of memcpy, mempcpy, memmove,
>>>> memcpy_chk, mempcpy_chk, memmove_chk.
>>>> It shows average improvement more than 30% over AVX versions on KNL
>>>> hardware, performance results attached.
>>>> Ok for trunk?
>>>
>>> It is too late for 2.23, but ok after review for 2.24.
>>
>> We would like this patch to be considered for glibc 2.23 since the functionality completes AVX-512 improvements of mem* routines.
>> Memset tuned for AVX-512 is already checked in so it looks reasonable to have full support in 2.23.
>> Also the changes are strongly AVX-512 specific, not adding any new interfaces so potential risk of the patch is pretty low.
>>
>> We already got review comments without any major questions to the patch and fixed version will be ready today.
>>
>> Given all this can the patch go to current glibc trunk after review is finished?
>
> Right, as I talked with Carlos in IRC I will let x86 maintainers have the final word on this inclusion.
Thanks!