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

From: "Amonson, Paul D" <paul(dot)d(dot)amonson(at)intel(dot)com>
To: Nathan Bossart <nathandbossart(at)gmail(dot)com>
Cc: Bruce Momjian <bruce(at)momjian(dot)us>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Andres Freund <andres(at)anarazel(dot)de>, "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: Proposal for Updating CRC32C with AVX-512 Algorithm.
Date: 2024-08-26 18:54:58
Message-ID: BL1PR11MB5304CE0D98A99B14CF64763EDC8B2@BL1PR11MB5304.namprd11.prod.outlook.com
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> 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

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