| From: | Nathan Bossart <nathandbossart(at)gmail(dot)com> |
|---|---|
| To: | "Chiranmoy(dot)Bhattacharya(at)fujitsu(dot)com" <Chiranmoy(dot)Bhattacharya(at)fujitsu(dot)com> |
| Cc: | "Devanga(dot)Susmitha(at)fujitsu(dot)com" <Devanga(dot)Susmitha(at)fujitsu(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, "Ragesh(dot)Hajela(at)fujitsu(dot)com" <Ragesh(dot)Hajela(at)fujitsu(dot)com> |
| Subject: | Re: [PATCH] Hex-coding optimizations using SVE on ARM. |
| Date: | 2025-01-10 15:38:14 |
| Message-ID: | Z4E-5oQGux-2R4iL@nathan |
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| Lists: | pgsql-hackers |
On Fri, Jan 10, 2025 at 11:10:03AM +0000, Chiranmoy(dot)Bhattacharya(at)fujitsu(dot)com wrote:
> We tried auto-vectorization and observed no performance improvement.
Do you mean that the auto-vectorization worked and you observed no
performance improvement, or the auto-vectorization had no effect on the
code generated?
> The instructions in src/include/port/simd.h are based on older SIMD
> architectures like NEON, whereas the patch uses the newer SVE, so some of
> the instructions used in the patch may not have direct equivalents in
> NEON. We will check the feasibility of integrating SVE in
> "src/include/port/simd.h" and get back to you.
Thanks!
--
nathan
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