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Date: Wed, 18 Apr 2007 19:53:45 +0200
From: Jan Kiszka <jan.kiszka@domain.hid>
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Subject: Re: [Xenomai-core] Ipipe and Siemens A&D Realtime
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To: "Krause, Karl-Heinz" <karl-heinz.krause@domain.hid>
Cc: xenomai@xenomai.org

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Krause, Karl-Heinz wrote:
> Hi Philippe
>=20
> =20
>=20
> as promised some time ago, I'd like to let you know the result of our w=
ork.
>=20
> Attached are=20
>=20
> -          a few recycled slides from a presentation describing motivat=
ion, features and results
>=20
> -          the patch file for a  adeos-ipipe-2.6.15-i386-1.3-04.patch  =
patched kernel2.6.15.4=20

You attached the glibc patches, but your ipipe variant is missing. Could
you also explain a bit what kind of optimisations your ipipe version
contains, maybe they are of generic interest and we can discuss a
potential integration? And a description of the features/hooks it adds
would be good as well. That might help to restart a discussion if there
is more common ground and a chance to merge.

>=20
> Since some parts of the kernel functionality (clock registration, realt=
ime capable message queues) and=20
>=20
> most parts of the glibc changes are also of  interest for the  RT_PREEM=
PT solution we are in contact with=20
>=20
> Thomas Gleixner trying to leverage the work.
>=20
> An update to newer versions of  kernel and glibc (basically  because of=
 the PI mutexes) is planned for later,
>=20
> presumably when RT_PREEMPT  has become mainline status.
>=20

Hmm, so your approach is locked to 2.6.15 for now? What is blocking
kernel / ipipe updates?

> =20
>=20
> If you need any further information just let me know.
>=20

According to your slides, you did a lot of concrete testing. Do you
happen to have comparative numbers of recent Xenomai's POSIX skin as
well (forgetting about the ABI issue for the moment)? Or do you have a
releasable test suite?

Jan


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