Re: Real-Time Preemption, -RT-2.6.12-final-V0.7.50-24

Ingo Molnar
2005-06-29T12:57:34Z

* William Weston <weston@sysex.net> wrote:

> On Wed, 29 Jun 2005, Ingo Molnar wrote:
>
> > > [...] but i think i'm going to revert that, it's causing too many
> > > problems all around.
> >
> > reverted it and this enabled the removal of the extra ->disable() you
> > noticed - this should further speed up the IOAPIC code. These changes
> > are in the -50-34 kernel i just uploaded.
>
> -50-34 fixed the wakeup latency regression I was seeing on my Athlon
> box with -50-33, and seems a bit more responsive than -50-25. Max
> wakeup latency is back down to 14us (from 39us), even while running
> JACK (xrun free) and two instances of burnK7. Overall system response
> is probably the best I've seen with the RT kernels ;-}

great! The SMP box running BurnP6 is another system, right? Could you
sum up the remaining regressions you are seeing under -RT? (the
latency.c warning is one, what others are remaining?)

Ingo