| From: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | pgsql-hackers(at)lists(dot)postgresql(dot)org |
| Subject: | Re: Missed condition-variable wakeups on FreeBSD |
| Date: | 2023-01-13 02:00:58 |
| Message-ID: | CA+hUKGLqiaWXf98=aLPANQQrrXx=n6BZdN+kjDod5YVAv5nEEg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sun, Feb 27, 2022 at 8:07 AM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> I have observed this three times in the REL_11 branch, once
> in REL_12, and a couple of times last summer before it occurred
> to me to start keeping notes. Over that time the machine has
> been running various patchlevels of FreeBSD 13.0.
FTR I noticed that my animal elver hadn't reported for a while and
logged and found it locked up, a bit like that, but in test_shm_mq
rather than PHJ. It's FreeBSD 13.1 on a fairly fast 16 way amd64 (in
a jail), and it was testing REL_12_STABLE, so using poll() for
WaitEventSetWaitBlock(). When I connected a debugger then
disconnected, it was unblocked and continued. Unfortunately I didn't
get any new information :-(
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