Re: [LAT] 2.6.29-rc4-rt2

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To: <linux-audio-tuning@...>
Date: Saturday, February 14, 2009 - 9:31 pm

2009/2/14 Emanuel Rumpf :

Ah ... fine !
At LAU-ML, I found a message (02.02.2009) by Robin Gareus,
which solves the problem:

`echo -1 > /proc/sys/kernel/sched_rt_runtime_us`

or edit /etc/sysctl.conf and add:
kernel.sched_rt_runtime_us = -1

and his comment:
"""
indeed, jackd did not start unless run as root or until I changed
/proc/sys/kernel/sched_rt_runtime_us

It's the us (or .001% of CPU usage?!) above which FIFO and RR will be
throttled to recover from a run-away rt process. - I'm not exactly sure
why it affects jackd when run as "normal" user; maybe because with CPU
load above the default 95% rt can not be guaranteed.

There's a bit [off topic] but enlightening info at
http://kerneltrap.org/mailarchive/linux-kernel/2008/8/16/2960524

"""

Thanks

--
Emanuel Rumpf
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Messages in current thread:
[LAT] testing rosegarden 1.7.0 and 1.6.1, Marcos Guglielmetti, (Fri Aug 1, 9:10 am)
Re: [LAT] Hyper Threading, Jaromír Mikeš, (Sun Sep 21, 11:26 pm)
[LAT] 2.6.29-rc4-rt2, Emanuel Rumpf, (Sat Feb 14, 6:45 pm)
Re: [LAT] 2.6.29-rc4-rt2, Emanuel Rumpf, (Sat Feb 14, 9:31 pm)
Re: [LAT] testing rosegarden 1.7.0 and 1.6.1, Daniel James, (Tue Aug 5, 4:06 pm)
Re: [LAT] testing rosegarden 1.7.0 and 1.6.1, Marcos Guglielmetti, (Tue Aug 5, 6:20 pm)
Re: [LAT] testing rosegarden 1.7.0 and 1.6.1, Daniel James, (Wed Aug 20, 10:28 am)
Re: [LAT] testing rosegarden 1.7.0 and 1.6.1, Marcos Guglielmetti, (Wed Aug 20, 8:30 pm)