Re: [PATCH] SVE popcount support

Kirill Reshke <reshkekirill@gmail.com>

From: Kirill Reshke <reshkekirill@gmail.com>

To: "Malladi, Rama" <rvmallad@amazon.com>

Cc: "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>, "Dipietro, Salvatore" <dipiets@amazon.co.uk>, "nathandbossart@gmail.com" <nathandbossart@gmail.com>

Date: 2024-11-28T15:45:11Z

Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

Optimize popcount functions with ARM SVE intrinsics.
- 519338ace410 18.0 landed
Optimize popcount functions with ARM Neon intrinsics.
- 6be53c27673a 18.0 landed
Rename TRY_POPCNT_FAST to TRY_POPCNT_X86_64.
- 9ac6f7e7ceb6 18.0 landed

On Thu, 28 Nov 2024 at 20:22, Malladi, Rama <rvmallad@amazon.com> wrote:
>
> Attachments protected by Amazon: 0001-SVE-popcount-support.patch | SVE-popcount-support-PostgreSQL.png |
> Amazon has replaced the attachments in this email with download links. Downloads will be available until December 27, 2024, 15:43 (UTC+00:00). Tell us what you think
> For more information click here
>
> Please find attached a patch to PostgreSQL implementing SVE popcount. I used John Naylor's test_popcount module [0] to put together the attached graphs. This test didn't show any regressions with a relatively small number of bytes, and it showed the expected improvements with many bytes.
>
>
>
> [0] https://postgr.es/m/CAFBsxsE7otwnfA36Ly44zZO+b7AEWHRFANxR1h1kxveEV=ghLQ@mail.gmail.com

Hi! To register entry on commitfest you need to send patch in one of
this format:

https://wiki.postgresql.org/wiki/Cfbot#Which_attachments_are_considered_to_be_patches.3F

This is useful for reviewers who use cfbot or cputube.

--
Best regards,
Kirill Reshke