31 Jan
2007
31 Jan
'07
7:07 a.m.
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What's with this "tickless" timer option for the HPET? What is its effect on
audio/RT performance? Is it worth trying?
Does it do anything on an Ingo-patched RT kernel anyway?
- -ken
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31 Jan
31 Jan
11:07 a.m.
On Wednesday 31 January 2007 12:06, Ken Restivo wrote:
What's with this "tickless" timer option
for the HPET? What is its effect
on audio/RT performance? Is it worth trying?
Does it do anything on an Ingo-patched RT kernel anyway?
-ken
http://rt.wiki.kernel.org/index.php/Tickless_kernel
Maybe it does some good though too, because generally the thoughput should
increase because that little bit of code called the scheduler is not run
additionally every 1/250 or 1/1000 sec. If i understand that correctly.
Flo
--
Palimm Palimm!
http://tapas.affenbande.org
9:47 p.m.
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On Wed, Jan 31, 2007 at 04:00:24PM +0100, Florian Schmidt wrote:
On Wednesday 31 January 2007 12:06, Ken Restivo
wrote:
Wow, that's interesting. "Tickless" made a dramatic improvement in DSP
usage! Instead of 65% at idle, it was more like 30%.
However, I'm still getting lots of crackles, and possibly better than tickless,
possibly worse, I can't tell.
- -ken
What's with this "tickless" timer
option for the HPET? What is its effect
on audio/RT performance? Is it worth trying?
Does it do anything on an Ingo-patched RT kernel anyway?
-ken
http://rt.wiki.kernel.org/index.php/Tickless_kernel
Maybe it does some good though too, because generally the thoughput should
increase because that little bit of code called the scheduler is not run
additionally every 1/250 or 1/1000 sec. If i understand that correctly.
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10:14 p.m.
Those are exciting results!
Did you have to do any other configuration magic to get it working? I'm
tempted to try a build for debian tonight.
Jon
On 1/31/07, Ken Restivo <ken(a)restivo.org> wrote:
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On Wed, Jan 31, 2007 at 04:00:24PM +0100, Florian Schmidt wrote:
should
On Wednesday 31 January 2007 12:06, Ken Restivo
wrote:
> What's with this "tickless" timer option for the HPET? What is its
effect
on
audio/RT performance? Is it worth trying?
Does it do anything on an Ingo-patched RT kernel anyway?
-ken
http://rt.wiki.kernel.org/index.php/Tickless_kernel
Maybe it does some good though too, because generally the thoughput increase because that little bit of code called
the scheduler is not run
additionally every 1/250 or 1/1000 sec. If i understand that correctly.
Wow, that's interesting. "Tickless" made a dramatic improvement in DSP
usage! Instead of 65% at idle, it was more like 30%.
However, I'm still getting lots of crackles, and possibly better than
tickless, possibly worse, I can't tell.
- -ken
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participants (3)
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Florian Schmidt -
Jon H -
Ken Restivo