Re: Proposal for enabling auto-vectorization for checksum calculations

On Sat, May 10, 2025 at 6:01 PM Stepan Neretin <slpmcf(at)gmail(dot)com> wrote:

>
>
> On Thu, May 8, 2025 at 6:57 AM Matthew Sterrett <
> matthewsterrett2(at)gmail(dot)com> 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
>
>
>
Oops, forgot to attach patches :)

Best,

Stepan Neretin