Horton

RE: Popcount optimization using AVX512

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: Andres Freund <andres@anarazel.de>, Alvaro Herrera <alvherre@alvh.no-ip.org>, "Shankaran, Akash" <akash.shankaran@intel.com>, Noah Misch <noah@leadboat.com>, Tom Lane <tgl@sss.pgh.pa.us>, "Matthias van de Meent" <boekewurm+postgres@gmail.com>, "pgsql-hackers@lists.postgresql.org" <pgsql-hackers@lists.postgresql.org>
Date: 2024-03-05T16:52:23Z
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 →

  1. Fix __attribute__((target(...))) usage.

  2. Use __attribute__((target(...))) for AVX-512 support.

  3. Fix code for probing availability of AVX-512.

  4. Optimize visibilitymap_count() with AVX-512 instructions.

  5. Optimize pg_popcount() with AVX-512 instructions.

  6. Inline pg_popcount() for small buffers.

  7. Avoid function call overhead of pg_popcount() in syslogger.c.

  8. Refactor code for setting pg_popcount* function pointers.

  9. Inline pg_popcount{32,64} into pg_popcount().

  10. Remove MSVC scripts

  11. Use ARMv8 CRC instructions where available.

  12. Use Intel SSE 4.2 CRC instructions where available.

-----Original Message-----
>From: Nathan Bossart <nathandbossart@gmail.com> 
>Sent: Tuesday, March 5, 2024 8:38 AM
>To: Amonson, Paul D <paul.d.amonson@intel.com>
>Cc: Andres Freund <andres@anarazel.de>; Alvaro Herrera <alvherre@alvh.no-ip.org>; Shankaran, Akash <akash.shankaran@intel.com>; Noah Misch <noah@leadboat.com>; Tom Lane <tgl@sss.pgh.pa.us>; Matthias van de Meent <boekewurm+postgres@gmail.com>; >pgsql-hackers@lists.postgresql.org
>Subject: Re: Popcount optimization using AVX512
>
>On Tue, Mar 05, 2024 at 04:31:15PM +0000, Amonson, Paul D wrote:
>> I am not sure what "top-post" means but I am not doing anything 
>> different but using "reply to all" in Outlook. Please enlighten me. 😊
>
>The following link provides some more information:
>
>	https://wiki.postgresql.org/wiki/Mailing_Lists#Email_etiquette_mechanics
>
>--
>Nathan Bossart
>Amazon Web Services: https://aws.amazon.com

Ahhhh.....Ok... guess it's time to thank Microsoft then.  ;) Noted I will try to do the "reduced" bottom-posting. I might slip up occasionally because it's an Intel habit. Is there a way to make Outlook do the leading ">" in a reply for the previous message?

BTW: Created the commit-fest submission.

Paul