| From: | John Naylor <johncnaylorls(at)gmail(dot)com> |
|---|---|
| To: | "Devulapalli, Raghuveer" <raghuveer(dot)devulapalli(at)intel(dot)com> |
| Cc: | Nathan Bossart <nathandbossart(at)gmail(dot)com>, "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org>, "Shankaran, Akash" <akash(dot)shankaran(at)intel(dot)com> |
| Subject: | Re: Improve CRC32C performance on SSE4.2 |
| Date: | 2025-03-12 06:54:02 |
| Message-ID: | CANWCAZZM=GZesOZARs1hPPFuu9p9UNOtnyn0=4KQzups9Mek4w@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Mar 12, 2025 at 3:57 AM Devulapalli, Raghuveer
<raghuveer(dot)devulapalli(at)intel(dot)com> wrote:
>
> > I've gone ahead and added the generated AVX-512 algorithm in v14-0005
> I'm a little confused. Why is v14 missing the earlier versions of pclmul implementation that works without avx-512?
As I mentioned upthread, the 128-bit implementation regresses on Zen 2
up to at least 256 bytes.
--
John Naylor
Amazon Web Services
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