Date: Sun, 06 Nov 2005 12:39:02 +0100 From: Sebastiaan van Erk <sebster@sebster.com> To: freebsd-stable@freebsd.org Subject: Sound skipping problems Message-ID: <436DEB56.4050505@sebster.com>
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Hi, I have major sound skipping problems on FreeBSD 6.0. I checked the mailing list archives and found a related thread: http://lists.freebsd.org/pipermail/freebsd-current/2005-June/051103.html To quote Jeff Roberson: > I have a patch that should greatly improve the sound skipping problems > people have under heavy io load. Several people sent me traces that > showed the buf daemon running for hundreds of milliseconds with Giant > held, which can hold up the pcm code. The patch is available at: > > http://www.chesapeake.net/~jroberson/flushbuf.diff The problems are definately correlated to io load, however I can't say that I have HEAVY io loads. A simple: # sync;sync;sync; will already cause the sound to skip. I have DMA enabled on all drives, and it seems the above patch is already merged into FreeBSD 6.0-STABLE. This leaves me at a loss, and I don't know what else to try... Does anybody have any ideas of what I could do to solve this problem? Thanks in advance, Sebastiaan van Erk root@piglet(ttyp9:92:0):~# uname -a FreeBSD piglet.sebster.com 6.0-STABLE FreeBSD 6.0-STABLE #1: Sat Nov 5 23:42:18 CET 2005 root@piglet.sebster.com:/usr/obj/usr/src/sys/PIGLET i386 root@piglet(ttyp9:93:0):~# cat /dev/sndstat FreeBSD Audio Driver (newpcm) Installed devices: pcm0: <VIA VT8237> at io 0xec00 irq 22 kld snd_via8233 (5p/1r/0v channels duplex default)
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