Date: Thu, 11 Feb 1999 09:16:07 -0700 From: Wes Peters <wes@softweyr.com> To: Bjoern Fischer <bfischer@Techfak.Uni-Bielefeld.DE> Cc: Matthew Dillon <dillon@apollo.backplane.com>, freebsd-stable@FreeBSD.ORG Subject: Re: NFS + cdda2wav Message-ID: <36C30247.966AC721@softweyr.com> References: <19990209233951.A402@broccoli.no-support.loc> <199902100355.TAA77997@apollo.backplane.com> <19990211031636.A2690@broccoli.no-support.loc>
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Bjoern Fischer wrote:
>
> On Tue, Feb 09, 1999 at 07:55:20PM -0800, Matthew Dillon wrote:
> [...]
> > Bjoern, ktrace the program run. I suspect the problem is not
> > NFS but that the write() latency is causing one of cdda2wav's
> > forked processes to exit and kill its child before the child
> > finishes writing.
> >
> > ktrace -t cn -i cdda2wav ....
> >
> > kdump -R | less
> >
> > Try to match up reads from the CD to writes to the output file.
> > See if the final couple of read/write's match up.
>
> Hmm, the procedure of testing changes the object being tested.
> The problem disappears while ktracing the run.
A "Heisenbug." But don't tell Terry, you'll get a fizzix lecture. ;^)
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
http://www.softweyr.com/~softweyr wes@softweyr.com
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