Re: [LAU] jack + vanilla kernel

Josh Lawrence wrote:
> quick question:
>
> if you are using jack with a vanilla kernel, should you still keep the
> realtime option enabled in jack, or run jack without the -R? my
> reasoning tells me that no realtime patch = no realtime in jack, but I
> just wanted to check myself with you all...

Hi Josh,

Scheduling JACK to run with realtime priority (using the -R option) is
separate to having a kernel that runs with hard realtime pre-emption
enabled. Ideally, you want both, but on a vanilla kernel, you still want
the -R option -- indeed, that's how I run my systems.

One way to think of it is that running with realtime priority (with the
-R option) instructs the kernel to run JACK with the best scheduling it
can possibly manage. If you also have realtime pre-emption in your
kernel, though, then the kernel's best effort will be... well, better :)

Thanks
Leigh
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Received on Fri Dec 18 08:15:02 2009