Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!

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To: Aaron Krister Johnson <aaron@...>
Cc: Linux-audio-user <linux-audio-user@...>
Date: Tuesday, June 14, 2011 - 11:30 am

On Tue, Jun 14, 2011 at 3:11 AM, Aaron Krister Johnson
wrote:

only all the usual deeply unpleasant, deeply technical stuff related
to figuring out sources of scheduling latency on your system. as i
mentioned previously, JACK requires that your system can context
switch efficiently and without delay. lots of people (including me)
have systems that have issues with this. its caused by a tangled
thicket of interactions between the motherboard, the PCI bus, the
kernel and some userspace stuff. there is no magic bullet that will
fix a given system.

case in point: i dramatically improved things on my system yesterday
by switching from the open source nouveau driver for my nvidia card to
the proprietary one. i can now run JACK down at -p 64 -n 2 and
dragging windows around or moving the mouse back and forth across the
boundary between two monitors no longer causes gaps in the audio
(which it used to be able to do even without xruns, suggesting PCI bus
issues). but still, after 12 hours of the new system, i still have 654
xruns. this is on a very, very powerful 6-core system but without an
RT kernel.

--p
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Messages in current thread:
[LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Aaron Krister Johnson, (Sun Jun 12, 7:40 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Aaron Krister Johnson, (Sun Jun 19, 8:46 pm)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Aaron Krister Johnson, (Tue Jun 14, 7:11 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Ralf Mardorf, (Tue Jun 14, 11:44 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Paul Davis, (Tue Jun 14, 11:30 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Lorenzo Sutton, (Wed Jun 15, 8:32 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Ralf Mardorf, (Tue Jun 14, 12:43 pm)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Gerhard Zintel, (Tue Jun 14, 11:14 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Jeremy Jongepier, (Tue Jun 14, 7:28 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Aaron Krister Johnson, (Tue Jun 14, 7:36 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Jeremy Jongepier, (Tue Jun 14, 8:00 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Paul Davis, (Sun Jun 12, 1:47 pm)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Atte André Jensen, (Sun Jun 12, 9:08 pm)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Aaron Krister Johnson, (Sun Jun 12, 4:49 pm)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Paul Davis, (Sun Jun 12, 8:23 pm)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Aaron Krister Johnson, (Mon Jun 13, 12:31 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Paul Davis, (Mon Jun 13, 1:02 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Aaron Krister Johnson, (Mon Jun 13, 7:08 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Aaron Krister Johnson, (Mon Jun 13, 7:06 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Robin Gareus, (Mon Jun 13, 9:54 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Igor Brkic, (Sun Jun 12, 12:16 pm)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Ralf Mardorf, (Sun Jun 12, 9:44 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Jeremy Jongepier, (Sun Jun 12, 9:59 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Ralf Mardorf, (Sun Jun 12, 10:15 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, James Warden, (Sun Jun 12, 10:47 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Ralf Mardorf, (Sun Jun 12, 12:30 pm)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Aaron Krister Johnson, (Sun Jun 12, 5:08 pm)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Ralf Mardorf, (Sun Jun 12, 6:28 pm)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Ralf Mardorf, (Sun Jun 12, 12:35 pm)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, rosea.grammostola, (Sun Jun 12, 9:36 am)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Aaron Krister Johnson, (Sun Jun 12, 4:45 pm)
Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!, Paul Davis, (Sun Jun 12, 8:21 pm)