Re: use a non-locking initial test in TAS_SPIN on AArch64

From: Nathan Bossart <nathandbossart(at)gmail(dot)com>
To: Jingtang Zhang <mrdrivingduck(at)gmail(dot)com>
Cc: pgsql-hackers(at)lists(dot)postgresql(dot)org
Subject: Re: use a non-locking initial test in TAS_SPIN on AArch64
Date: 2024-10-23 15:18:55
Message-ID: ZxkT3_2zQiXoh3eW@nathan
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On Wed, Oct 23, 2024 at 09:46:56AM -0500, Nathan Bossart wrote:
> I have a couple of Apple M-series machines I can test, too.

After some preliminary tests on an M3, I'm not seeing any gains outside the
noise range. That's not too surprising because it's likely more difficult
to create a lot of spinlock contention on these smaller machines. But, at
the very least, I'm not seeing a regression.

--
nathan

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