12 Jun
2011
12 Jun
'11
2:30 p.m.
On Sun, 2011-06-12 at 03:46 -0700, James Warden wrote:
--- On Sun, 6/12/11, Ralf Mardorf <ralf.mardorf(a)alice-dsl.net> wrote:
But I wish to have the opportunity to chose the frequency scaling e.g.
by the GNOME panel, just the default should be the kernel's default. I
don't understand what the script is good for. IMO it only cause pain.
This script and the behaviour it cause is for a default Debian install
and IMO this is idiocy. A default can be set by the kernel
configuration, what's bad with this? The most often cause for xruns for
the last month I read about, was a bad CPU frequency scaling.
I'm curios about the cause of "Jack vs. Alsa, PianoTeq demo: Alsa
wins!".
I experienced that as soon as jackd is involved, even if a media player
was ok with ALSA, I got xruns causing audible glitches, already without
CPU load, while there were never xruns or audible glitches as soon as
the CPU frequency scaling is set to performance, even for heavy resource
hungry audio productions. There might be two xruns when I start a
session, but no additional for the next 48 hours.
Regards,
Ralf
From: Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net>
Subject: Re: [LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!
To: linux-audio-user(a)lists.linuxaudio.org
Date: Sunday, June 12, 2011, 6:15 AM
On Sun, 2011-06-12 at 11:59 +0200,
Jeremy Jongepier wrote:
of the
from the same script of debian:
<snip>
if [ -f /etc/default/cpufrequtils ] ; then
. /etc/default/cpufrequtils
fi
# if not enabled then exit gracefully
[ "$ENABLE" = "true" ] || exit 0
if [ -n "$MAX_SPEED" ] && [ $MAX_SPEED != "0" ] ; then
CPUFREQ_OPTIONS="$CPUFREQ_OPTIONS --max $MAX_SPEED"
fi
if [ -n "$MIN_SPEED" ] && [ $MIN_SPEED != "0" ] ; then
CPUFREQ_OPTIONS="$CPUFREQ_OPTIONS --min $MIN_SPEED"
fi
if [ -n "$GOVERNOR" ] ; then
CPUFREQ_OPTIONS="$CPUFREQ_OPTIONS --governor $GOVERNOR"
fi
</snip>
The debian way is to have a default config in the directory /etc/default, which
cpufrequtils is sourcing if it exists (see script snippet above). So either you make one
if you don't have one or get informed before calling such config scheme
"idiocy". I don't want to be too hard in my critics but you seem to be a
little too noisy too fast. Make sure you RTFM before posting such judgemental comments on
distros.
J. On 06/12/2011 11:44 AM, Ralf Mardorf wrote:
> What CPU frequency scaling? Is it set to
performance? There's a new
> nuisance for GNOME desktops on Ubuntu and
Debian,
they ignore the
> kernel's default CPU frequency scaling,
they
switch from 'performance'
to
'ondemand' for GNOME sessions.
apt-file search ondemand | grep init.d
initscripts: /etc/init.d/ondemand
So at least on Ubuntu the ondemand init script is part initscripts package and has nothing to do with
Gnome.
Best,
Jeremy
Thank you :)
On Debian it's
$ cat /etc/init.d/cpufrequtils
#!/bin/sh
[snip]
GOVERNOR="ondemand"
[snip]