[systemd-devel] Current status wrt. realtime services (aka jackd)

[Lennart Poettering]

On Tue, 26.08.14 23:55, Ivan Shapovalov (intelfx100 at gmail.com) wrote:

> On Tuesday 26 August 2014 at 02:48:04, Lennart Poettering wrote:	
> > On Tue, 26.08.14 02:02, Ivan Shapovalov (intelfx100 at gmail.com) wrote:
> > 
> > > Hello all,
> > > 
> > > is there some replacement of the "ControlGroupAttribute=cpu.rt_runtime_us <somevalue>"
> > > tunable described at http://www.freedesktop.org/wiki/Software/systemd/MyServiceCantGetRealtime/
> > > for allowing services like `jackd -R` to run?
> > 
> > Currently there isn't the rt cgroup attrs still haven't been
> > implemented, because the kernel side interface is so awful, and is about
> > to get changed.
> > 
> > Best is probably to write these bits out from ExecStartPre= or so, and
> > use "%r" to get the cgroup path. But it's really nasty, since it isn't
> > clear what to write in there, and you'd have to iterate it up the tree, manually.
> 
> That's pretty unfortunate. Is there any ETA for this or a checklist of what
> has to be done?

Tejun has been working on the kernel side to clean up the controllers
one-by-one to expose sane behaviour to userspace. There isn#t really an
ETA on that...

Lennart

-- 
Lennart Poettering, Red Hat