Re: optimize atomic exchanges

From: Nathan Bossart <nathandbossart(at)gmail(dot)com>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: optimize atomic exchanges
Date: 2023-12-04 21:08:57
Message-ID: 20231204210857.GA2203877@nathanxps13
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On Mon, Dec 04, 2023 at 12:18:05PM -0600, Nathan Bossart wrote:
> Barring objections or additional feedback, I think I'm inclined to press
> forward with this one and commit it in the next week or two. I'm currently
> planning to keep the inline assembly, but I'm considering removing the
> configuration checks for __atomic_exchange_n() if the availability of
> __atomic_compare_exchange_n() seems like a reliable indicator of its
> presence. Thoughts?

Concretely, like this.

Nathan Bossart
Amazon Web Services:

Attachment Content-Type Size
v2-0001-Optimize-pg_atomic_exchange_u-32-64.patch text/x-diff 6.1 KB

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