| From: | Michael Paquier <michael(at)paquier(dot)xyz> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Alexander Korotkov <aekorotkov(at)gmail(dot)com>, Krunal Bauskar <krunalbauskar(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Improving spin-lock implementation on ARM. |
| Date: | 2020-11-27 08:54:56 |
| Message-ID: | X8C+4BiJtxygyQnd@paquier.xyz |
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| Thread: | |
| Lists: | pgsql-hackers |
On Fri, Nov 27, 2020 at 02:50:30AM -0500, Tom Lane wrote:
> Yeah, that wasn't making sense to me either. The most likely explanation
> seems to be that I messed up the test somehow ... but I don't see where.
> So, again, I'm wondering if anyone else can replicate or refute this.
I do find your results extremely surprising not only for 4, but for
all tests with connection numbers lower than 32. With a scale factor
of 100 that's suspiciously a lot of difference.
> I can't be the only geek around here who sprang for an M1.
Not planning to buy one here, anything I have read on that tells that
it is worth a performance study.
--
Michael
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