Kernel-lowlatency vs kernel-rt
zequence at mousike.me
Sat Nov 3 00:30:40 UTC 2012
On Fri, 02 Nov 2012 23:58:39 +0100, Ralf Mardorf
<ralf.mardorf at alice-dsl.net> wrote:
> Hi :)
> on Ubuntu Studio Quantal I switched to
> $ uname -a
> Linux qrc 3.6.5-rt14 #1 SMP PREEMPT RT Fri Nov 2 21:36:37 CET 2012
> x86_64 x86_64 x86_64 GNU/Linux
> A kernel-rt seems to be much better on my machine.
> With the kernel-lowlatency for a very small audio session, CPU usage
> "< 10%", I get xruns with
> Now, with the kernel-rt everything seems to be [Ok] with
> but with frames_period=128 I get xruns again.
Did you compare with a lowlatency of the same kernel version?
If not, the test is not very conclusive.
If you like to see some good results from a lowlatency kernel, try 2.6.37,
and perhaps also 2.6.38 and 2.6.39
As you might have experienced, something made kernels less reliable from
somewhere around version 3.
I haven't tried 3.6 series yet.
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