From: Kevin Ryde <user42@zip.com.au>
Cc: Guile Development <guile-devel@gnu.org>
Subject: Re: A guile story
Date: Wed, 29 Nov 2006 07:09:07 +1100 [thread overview]
Message-ID: <87lklv2v18.fsf@zip.com.au> (raw)
In-Reply-To: <874pte9sz3.fsf@ossau.uklinux.net> (Neil Jerram's message of "Sun, 05 Nov 2006 08:51:28 +0000")
Neil Jerram <neil@ossau.uklinux.net> writes:
>
> I eventually narrowed this down to the interaction between calling
> accept on the main FTP server thread at the same time as read on the
> FTP data connection thread (which is where the breakpoint was hit).
> At least, the problem was apparently fixed by inserting a select
> before the accept, so that the accept never blocked. I'm aware that
> this problem has been reported before, and that someone prepared a
> patch to fix it, but (i) I thought we had applied that patch, and (ii)
> I thought the problem affected coop threads only, not pthreads.
I ran into recvfrom() blocking all threads not so long ago too. I
forget if I posted here about it, but I put a remark in the manual,
On a GNU/Linux system `recvfrom!' is not multi-threading, all
threads stop while a `recvfrom!' call is in progress. An
application may need to use `select', `O_NONBLOCK' or
`MSG_DONTWAIT' to avoid this.
It's tempting to try to do better in guile, though no doubt it'd help
everybody if it could be improved in libc or libpthreads or wherever.
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prev parent reply other threads:[~2006-11-28 20:09 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-05 8:51 A guile story Neil Jerram
2006-11-05 13:20 ` Andy Wingo
2006-11-05 21:42 ` Neil Jerram
2006-11-06 9:12 ` Ludovic Courtès
2006-11-07 10:24 ` Neil Jerram
2006-11-07 13:01 ` Ludovic Courtès
2006-11-05 23:22 ` Neil Jerram
2006-11-06 9:24 ` Serious GC problem in HEAD Ludovic Courtès
2006-11-07 10:19 ` Neil Jerram
2006-11-07 12:51 ` Ludovic Courtès
2006-11-08 10:00 ` Ludovic Courtès
2006-11-19 15:02 ` Neil Jerram
2006-11-20 13:09 ` Ludovic Courtès
2006-11-29 23:34 ` Kevin Ryde
2006-11-30 15:11 ` Ludovic Courtès
2006-11-28 20:09 ` Kevin Ryde [this message]
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