Date: Tue, 23 Mar 2004 10:43:10 +0100 From: Pav Lucistnik <pav@FreeBSD.org> To: =?ISO-8859-1?Q?S=F8ren?= Schmidt <sos@DeepCore.dk> Cc: Eirik Oeverby <ltning-freebsd-current@anduin.net> Subject: Re: sound issues in -CURRENT Message-ID: <1080034989.10553.12.camel@pav.hide.vol.cz> In-Reply-To: <405FF4B9.30905@DeepCore.dk> References: <20040309070524.40ad96f5.ryan@slipgate.org> <20040312232251.48c0c57d.ryan@slipgate.org> <405FED9B.3050106@anduin.net> <405FF4B9.30905@DeepCore.dk>
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V út, 23. 03. 2004 v 09:26, Sřren Schmidt píše:
> > Heavy disk I/O seems to be a trigger for the problem. I always hear the
> > screwups, but i.e. when building mozilla or openoffice (during the
> > extract phase with heavy I/O), sound almost slows down to a complete
> > stop, stutters and hicks and cracks all the time - to a point where the
> > music is almost impossible to even identify anymore.
> I think you are suffering from the high interrupt latency in -current,
> this combined with a soundcard with a small buffer would easily lead to
> your problems. A slow disk or PIO mode could also be troublesome in some
> cases. You do have witness etc turned off right ?
I hear this too, on both my cards (Soundblaster 128 and onboard AC97
codec). I have all possible debugging turned off. Heavy disc activity
like untarring triggers the symptoms, which sounds like buffer underruns
on the soundcard. Almost sounds like a new ATA stack is really effective
(leaving little CPU cycles for feeding data to soundcard).
--
Pav Lucistnik <pav@oook.cz>
<pav@FreeBSD.org>
In God we trust. All others must use the callback verifier.
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