From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <448808E2.3050900@domain.hid> Date: Thu, 08 Jun 2006 13:24:18 +0200 From: Jan Kiszka MIME-Version: 1.0 Subject: Re: [Xenomai-help] xenomai and ppc issues References: <756DFD3DE8F1D411A59A00306E06E84704707D02@domain.hid> In-Reply-To: <756DFD3DE8F1D411A59A00306E06E84704707D02@domain.hid> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig9FB95DC9ECFE4623DD6D736F" Sender: jan.kiszka@domain.hid List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: GUARDIOLA-FALCO Sebastien 204282 Cc: xenomai@xenomai.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig9FB95DC9ECFE4623DD6D736F Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: quoted-printable GUARDIOLA-FALCO Sebastien 204282 wrote: > Hello, >=20 > I'm involved in a real-time project for a PPC mvme2700 target, and I ne= ed hard real-time tasks that can be executed in user-space. Seems that on= ly Xenomai can meet the requirements. > My first question is to have confirmation that RTAI or LXRT are x86 bas= ed and can not help me. RTAI used to support other archs as well, but the situation has changed AFAIK. > The second issue is to know how I can install Xenomai (do I need to ins= tall Adeos kernel first? which version should I download?) Start with the latest stable release (2.1.2) and follow README.INSTALL. > and to know how far Xenomai goes in hard real-time (better preemption l= atency that RTAI?). Cannot comment on this as I do not have comparable numbers for PPC. Once you have 2.1.2 running, check the testsuite (xeno-test script or individual tests) to get an impression of what is possible. You are invited to post results here in order to let other PPC user cross-check/comment (an automated test with online result database is under development). Xenomai constantly improves with respect to worst-case latency and overall performance. Upcoming version 2.2 will introduce, e.g., additional optimisations which can reduce user space scheduling latencies by ~20%. But, of course, the closer your design requirements get to the benchmark results, the more careful and intensive your performance analysis of the final system has to be. Jan --------------enig9FB95DC9ECFE4623DD6D736F Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFEiAjiniDOoMHTA+kRAugYAJ95efUSwE6m2eCnTsMBmaiNpqcFcACfUXEt 2IqpRo8LOi82/KvBtllriz0= =2090 -----END PGP SIGNATURE----- --------------enig9FB95DC9ECFE4623DD6D736F--