Philippe Gerum wrote:
> On Wed, 2006-08-30 at 14:36 +0200, Philippe Gerum wrote:
> > -------- Forwarded Message --------
> > > From: Daniel Schnell <[EMAIL PROTECTED]>
> > > To: xenomai-help <[email protected]>
> > > Subject: Performance decrease
> > > Date: Wed, 30 Aug 2006 11:58:25 -0000
> > >
> > > Hi,
> > >
> > >
> > >
> > > I have made some CPU throughput tests with/without "Nucleus
> > > options->pervasive real-time support in user-space"
> > enabled/disabled. And the performance dicrease in using that option is
> > for my processor (MPC5200, 400 MHz) about 10%.
>
> There is an impact induced by activating the user-space support, since
> all system calls are filtered through Xenomai; some work is currently
> undergoing to reduce this overhead, so that only system calls issued by
> Xenomai shadows would be intercepted. This said, out of curiosity, how
> do you measure those 10% on your board?
Just being curious: how will you achieve this ? You will make the
function used to dispatch system calls a per-thread pointer ?
--
Gilles Chanteperdrix.
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