Postgres Pro
Downloads
Home   >   mailing lists

Re: Improve CRC32C performance on SSE4.2 - Mailing list pgsql-hackers

From John Naylor
Subject Re: Improve CRC32C performance on SSE4.2
Date
Msg-id CANWCAZZM=GZesOZARs1hPPFuu9p9UNOtnyn0=4KQzups9Mek4w@mail.gmail.com
Whole thread Raw
In response to RE: Improve CRC32C performance on SSE4.2  ("Devulapalli, Raghuveer" <raghuveer.devulapalli@intel.com>)
Responses RE: Improve CRC32C performance on SSE4.2
List pgsql-hackers
Tree view 
On Wed, Mar 12, 2025 at 3:57 AM Devulapalli, Raghuveer
<raghuveer.devulapalli@intel.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

pgsql-hackers by date:

Previous
From: John Naylor
Date:
Subject: Re: CRC32C Parallel Computation Optimization on ARM
Next
From: John Naylor
Date:
Subject: Re: vacuumdb changes for stats import/export