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Message-ID:	<5155E031.4030901@mathematik.uni-kl.de>
Date:	Fri, 29 Mar 2013 19:40:49 +0100
From:	=?ISO-8859-1?Q?Andreas_Steenpa=DF?= <steenpass AT mathematik DOT uni-kl DOT de>
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To:	cygwin AT cygwin DOT com
Subject:	Re: SIGCHLD is not delivered
References:	<5154460D DOT 4090101 AT mathematik DOT uni-kl DOT de> <20130329132942 DOT GD3460 AT ednor DOT casa DOT cgf DOT cx>
In-Reply-To:	<20130329132942.GD3460@ednor.casa.cgf.cx>

Le 29/03/2013 14:29, Christopher Faylor a écrit :
> On Thu, Mar 28, 2013 at 02:30:53PM +0100, Andreas Steenpa? wrote:
>> I have noticed that sometimes SIGCHLD is not delivered when a child
>> process exits. I can reproduce this behaviour reliably under the
>> following, very special circumstances:
> I've uploaded a new snapshot which seems to fix this problem.  Before
> running it, I could see a rare when I ran your test case in a loop.
> After, I never saw a hang.
>
> Thanks for the test case and please give the snapshot a try.

I've installed the newest snapshot and recompiled the test case, but it
still hangs on my system. I'm sorry for interfering with your release.
Is there any further information I could provide to solve this issue?

Just to be sure:
$ uname -a
CYGWIN_NT-6.1-WOW64 zoppo 1.7.18s(0.263/5/3) 20130329 13:18:55 i686 Cygwin

My installation of Windows runs in a virtual machine. Could this maybe
influence the race conditions? I've noticed that the resolutions I get
with clock_gettime(CLOCK_REALTIME, ...); are quite coarse (a few
milliseconds!) in comparison to my Linux system (nanoseconds), or is
this a general Cygwin thing?

Best regards,
Andreas


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