Re: [ANNOUNCE] Linux 2.6 Real Time Kernel

[stefan . eletzhofer]

On Sat, Oct 09, 2004 at 02:30:28PM -0400, Lee Revell wrote:
> On Sat, 2004-10-09 at 13:41, Karim Yaghmour wrote:
> > Sven-Thorsten Dietrich wrote:
> > >     - Voluntary Preemption by Ingo Molnar
> > >     - IRQ thread patches by Scott Wood and Ingo Molnar
> > >     - BKL mutex patch by Ingo Molnar (with MV extensions)
> > >     - PMutex from Germany's Universitaet der Bundeswehr, Munich
> > >     - MontaVista mutex abstraction layer replacing spinlocks with mutexes
> > 
> > To the best of my understanding, this still doesn't provide deterministic
> > hard-real-time performance in Linux.
> 
> Using only the VP+IRQ thread patch, I ran my RT app for 11 million
> cycles yesterday, with a maximum delay of 190 usecs.  How would this not
> satisfy a 200 usec hard RT constraint?

I think the keyword here is "deterministic", isn't it?

> 
> PHB:      "I've looked at your proposal and decided it can't be done"
> Dilbert:  "I just did it.  It's working perfectly" 
> 
> Lee
> 
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