Date: Tue, 23 Mar 2004 12:13:35 +0100 From: Eirik Oeverby <ltning@anduin.net> To: pav@FreeBSD.org Cc: Eirik Oeverby <ltning-freebsd-current@anduin.net> Subject: Re: sound issues in -CURRENT Message-ID: <40601BDF.8040708@anduin.net> In-Reply-To: <1080034989.10553.12.camel@pav.hide.vol.cz> References: <20040309070524.40ad96f5.ryan@slipgate.org> <20040312232251.48c0c57d.ryan@slipgate.org> <405FED9B.3050106@anduin.net> <405FF4B9.30905@DeepCore.dk> <1080034989.10553.12.camel@pav.hide.vol.cz>
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Hoi, I have all debugging and witness stuff disabled, though I am using SCHED_ULE. Apart from that, the problem seems to be somewhat less evident when playing from the network (no playback-related disk i/o), but it only reduces the problem - it does not eliminate it. As I have stated earlier, the problem gets worse over time. After a clean reboot (even though all the apps I use are started and running), the problem shows up once every few minutes. Now, after a couple of days uptime, it happens a few times per minute - enough to annoy me ever so slightly when trying to tap the rhytm with my foot ;) My HDD is running in ATA-100 mode (no PIO) and is reasonably fast. FreeBSD 4.9 works perfectly on the same machine, with all the same software. /Eirik Pav Lucistnik wrote: > 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). >
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