| From: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
|---|---|
| To: | Noah Misch <noah(at)leadboat(dot)com> |
| Cc: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Query execution in Perl TAP tests needs work |
| Date: | 2023-08-29 04:25:24 |
| Message-ID: | CA+hUKGJEn_1nRJ2=eNd8iNUCP5-ORG7HL+x27Bet00T5N9YkNg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Aug 29, 2023 at 1:48 PM Noah Misch <noah(at)leadboat(dot)com> wrote:
> https://github.com/cpan-authors/IPC-Run/issues/166#issuecomment-1288190929
Interesting. But that shows a case with no pipes connected, using
select() as a dumb sleep and ignoring SIGCHLD. In our usage we have
pipes connected, and I think select() should return when the child's
output pipes become readable due to EOF. I guess something about that
might be b0rked on Windows? I see there is an extra helper process
doing socket<->pipe conversion (hah, that explains an extra ~10ms at
the start in my timestamps)... I can't really follow that code, but
perhaps the parent forgot to close the far end of the socket pair, so
there is no EOF?
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