Re: latency & real-time-ness.

From: Dieter Nützel (Dieter.Nuetzel@hamburg.de)
Date: Mon Mar 04 2002 - 11:20:41 EST


On Montag, 4. März 2002 03:45:27, Robert Love wrote:
> On Sun, 2002-03-03 at 22:32, Ben Greear wrote:
>
> > I found this patch:
> > preempt-kernel-rml-2.4.19-pre2-ac2-1.patch
> >
> > It applied cleanly...looks like maybe this isn't
> > the low-latency patch though now that I look at
> > it a little closer.
>
> Right, it is not. It is the preemptive kernel patch. More information
> can be found at http://tech9.net/rml/linux

Robert I am running 2.4.19-pre2-ac2 + preemption + lock-break.
It is very snappy due to lock-break I think.
But lock-break failed on vmscan.c and I didn't apply it by hand this time.
There was another fail but it was small and easily fixable.
We need a new lock-break, soon.

Sadly it is relative hard to put sched-O1-2.4.18-pre8-K3.patch and preemption
on top of 2.4.19pre2aa1 which I did for several weeks before. The throughput
with -aa VM maintenance is much better then with -ac.

Latest -aa is 2.4.18-pre8-K3-VM-24-preempt-lock.

Regards,
        Dieter

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