Re: [git] CFS-devel, latest code

Mike Galbraith
2007-09-25T10:02:20Z

On Tue, 2007-09-25 at 11:47 +0200, Ingo Molnar wrote:
> * Mike Galbraith <efault@gmx.de> wrote:
>
> > On Tue, 2007-09-25 at 11:13 +0200, Ingo Molnar wrote:
> >
> > > > [...] Latencies of up to 336ms hit me during the recompile (make -j3),
> > > > with nothing else running. Since reboot, latencies are, so far, very
> > > > very nice. [...]
> > >
> > > 'very very nice' == 'best ever' ? :-)
> >
> > Yes. Very VERY nice feel.
>
> cool :-)
>
> Maybe there's more to come: if we can get CONFIG_FAIR_USER_SCHED to work
> properly then your Xorg will have a load-independent 50% of CPU time all
> to itself. (Group scheduling is quite impressive already: i can log in
> as root without feeling _any_ effect from a perpetual 'hackbench 100'
> running as uid mingo. Fork bombs no more.) Will the Amarok gforce plugin
> like that CPU time splitup? (or is most of the gforce overhead under
> your user uid?)

I run everything as root (naughty me), so I'd have to change my evil
ways to reap the benefits. (I'll do that to test, but it's unlikely to
ever become a permanent habit here) Amarok/Gforce will definitely like
the user split as long as latency is low. Visualizations are not only
bandwidth hungry, they're extremely latency sensitive.

-Mike