Subject: Re: [LAU] yoshimi bug - fixed by me !

From: <hollunder@...> · Date: Tuesday, November 10, 2009 - 1:48 pm

On Tue, 10 Nov 2009 14:33:54 +0100

fons@kokkinizita.net wrote:
> On Tue, Nov 10, 2009 at 02:00:54PM +0200, Fritz Meissner wrote:

quoted text>

> > We are happy to announce that the real time kernel will be an

> > official upstream release patch.  It will be installed by default

> > if the audio task is selected. We have tested it heavily and are

> > very happy with it's performance in audio environments.

>

> Recent stock kernels seem to be RT anyway. The one that came

> with the ArchLinux install on my notebook a few weeks ago is

> 2.6.31-ARCH #1 SMP PREEMPT Tue Oct 13 13:36:23.

>

> I've been running an USB interface on that machine with -n 3

> -p 64 for the last 6 hours. Round-trip latency with this setup

> is 9.41 ms, and I've seen zero xruns so far. Never been able to

> do that before.

>

> Ciao,
The default Arch Linux kernel is compiled with the highest

level of preemption the stock kernel can provide but it does not

include the preempt-rt patches.
Some other stuff isn't optimal as well from the Audio/Midi point of

view, but you're right, it already performs very well, well enough for

many uses.
Another interesting option some fellow Archers experiment with is using

the stock kernel with a different scheduler (BFS), which also seems to

work very well.
So yeah, the stock kernel can already perform very well, but it depends

on how it is compiled.
Regards,

Philipp

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