| From: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, samay sharma <smilingsamay(at)gmail(dot)com>, Nazir Bilal Yavuz <byavuz81(at)gmail(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com> |
| Subject: | Re: [RFC] building postgres with meson - v12 |
| Date: | 2022-08-28 03:38:31 |
| Message-ID: | CA+hUKGJ44WybV1jECx7q2+AD7O6sY0d4sWnegarqKUnQCsgE-w@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sun, Aug 28, 2022 at 1:39 PM Andres Freund <andres(at)anarazel(dot)de> wrote:
> On 2022-08-27 18:02:40 -0700, Andres Freund wrote:
> > FWIW, I did notice that netbsd does have working unnamed semaphores. I don't
> > know how long ago they were added, but they apparently didn't work quite right
> > in 2018 [1]. No meaningful performance chance in the main regression tests,
> > I'll run a concurrent check world comparison in the background...
>
> Unnamed ones are substantially worse unfortunately. On an 8 core netbsd 9.3
> VM:
I could update my experimental patch to add home made semaphores using
atomics and futexes. It needs NetBSD 10, though. Also works on
OpenBSD and macOS.
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