Horton

RE: Proposal for Updating CRC32C with AVX-512 Algorithm.

Amonson, Paul D <paul.d.amonson@intel.com>

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From: "Amonson, Paul D" <paul.d.amonson@intel.com>
To: Nathan Bossart <nathandbossart@gmail.com>
Cc: Bruce Momjian <bruce@momjian.us>, Alvaro Herrera <alvherre@alvh.no-ip.org>, Andres Freund <andres@anarazel.de>, "pgsql-hackers@lists.postgresql.org" <pgsql-hackers@lists.postgresql.org>, "Shankaran, Akash" <akash.shankaran@intel.com>
Date: 2024-08-26T18:54:58Z
Lists: pgsql-hackers

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  1. Compute CRC32C using AVX-512 instructions where available

> And this still shows the ~14% regression in your original post?

At the small buffer sizes the margin of error or "noise" is larger, 7-11%. My average could be just bad luck. It will take me a while to re-setup for full data collection runs but I can try it again if you like.

Paul