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From: Stepan Neretin <[email protected]>
To: Matthew Sterrett <[email protected]>
Cc: [email protected]
Cc: Devulapalli, Raghuveer <[email protected]>
Cc: Shankaran, Akash <[email protected]>
Subject: Re: Proposal for enabling auto-vectorization for checksum calculations
Date: Sat, 10 May 2025 18:01:06 +0700
Message-ID: <CA+Yyo5RihTRUdUdanuNYhjQeXQY6412FWjzaxJAQR5MGX83=EQ@mail.gmail.com> (raw)
In-Reply-To: <CA+vA8587=RpZuL+EJ=XKM-8-xdPxz2mFexbAjaimN+OkXysXqw@mail.gmail.com>
References: <CA+vA85_5GTu+HHniSbvvP+8k3=xZO=WE84NPwiKyxztqvpfZ3Q@mail.gmail.com>
	<CA+vA8587=RpZuL+EJ=XKM-8-xdPxz2mFexbAjaimN+OkXysXqw@mail.gmail.com>

On Thu, May 8, 2025 at 6:57 AM Matthew Sterrett <[email protected]>
wrote:

> Hello! I'm still trying to figure out those CI failures, I just wanted
> to update things.
>
> From my testing, with this patch repeatedly disabling/enabling
> checksums is about 12.4% on an approximately 15 GB database.
>
> By the way, I'd love it if anyone could help me figure out how to
> replicate a CI failure in the Cirrus CI.
> I haven't been able to figure out how to test CI runs locally, does
> anyone know a good method to do that?
>
>
>
Hi Matthew,

Thanks for the patch!

I ran some timing tests:

(without avx2)

Time: 4034.351 ms
SELECT drive_pg_checksum(512);

(with avx2)


Time: 3559.076 ms
SELECT drive_pg_checksum(512);

Also attached two patches that should fix the CI issues.

Best,

Stepan Neretin

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