| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
| Cc: | "Shankaran, Akash" <akash(dot)shankaran(at)intel(dot)com>, Nathan Bossart <nathandbossart(at)gmail(dot)com>, Noah Misch <noah(at)leadboat(dot)com>, "Amonson, Paul D" <paul(dot)d(dot)amonson(at)intel(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Matthias van de Meent <boekewurm+postgres(at)gmail(dot)com>, "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Popcount optimization using AVX512 |
| Date: | 2024-02-09 18:24:32 |
| Message-ID: | 20240209182432.7c2peq5cgbdl43um@awork3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2024-01-26 07:42:33 +0100, Alvaro Herrera wrote:
> This suggests that finding a way to make the ifunc stuff work (with good
> performance) is critical to this work.
Ifuncs are effectively implemented as a function call via a pointer, they're
not magic, unfortunately. The sole trick they provide is that you don't
manually have to use the function pointer.
Greetings,
Andres
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