Re: Shielded CPUs

[Arjan van de Ven]

On Wed, Apr 14, 2004 at 11:11:47AM -0400, Calin A. Culianu wrote:
> On Wed, 14 Apr 2004, Arjan van de Ven wrote:
> 
> > On Wed, 2004-04-14 at 16:23, Calin A. Culianu wrote:
> > > This might be a bit off-topic (and might belong in the rtlinux mailing
> > > list), but I wanted people's opinion on LKML...
> > >
> > > There's an article in the May 2004 Linux Journal about some CPU affinity
> > > features in Redhawk Linux that allow a process and a set of interrupts to
> > > be locked to a particular CPU for the purposes of improving real-time
> > > performance.
> >
> > well you can do both of those already in 2.6 and in all recent vendor
> > 2.4's that I know of..... no patches needed.
> 
> 
> Cool.. it's still not, strictly speaking, _hard_ realtime, though, is it?
> Simply really good soft-realtime, right?

yep. Hard real time means you need to get a hard RT OS code. Simple as that.
And you'll always see that those cores are kept relatively small so that the
vendor can basically prove it's RT correctness.

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