From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <50FDCD39.2000603@xenomai.org> Date: Tue, 22 Jan 2013 00:20:25 +0100 From: Gilles Chanteperdrix MIME-Version: 1.0 References: <1358804184.96123.YahooMailNeo@web172102.mail.ir2.yahoo.com> In-Reply-To: <1358804184.96123.YahooMailNeo@web172102.mail.ir2.yahoo.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai] Building xenomai with latest buildroot snapshot. List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: bifferos Cc: "xenomai@xenomai.org" On 01/21/2013 10:36 PM, bifferos wrote: > > > I was able to compile Xenomai under buildroot 2011.11 without too much trouble, however I'm now trying > > to do the same with the latest buildroot snapshot. Unfortunately it seems buildroot no longer has an > easy option to select a kernel compatible with Xenomai. I looked in xenomai-2.6.1/ksrc/arch/x86/patches > > and there are three of them > > adeos-ipipe-2.6.37.6-x86-2.9-02.patch > adeos-ipipe-2.6.38.8-x86-2.11-01.patch > ipipe-core-3.2.21-x86-1.patch > > > Can someone please explain what this ipipe-core thing is? I am desperately looking for a mail from Philippe where he explained it, but can not find it back. Maybe he can give some explanations. > Are these interchangeable (they are similar > sizes)? Yes. > Do I have to stick to 2.6.37.6 kernel to stand any chance of getting this working? The newer versions should work, though I would recommend to wait for the next release which should happen in the next few days. Also note that I guess you are using Xenomai on the bifferboard, since I also guess the processor on this board does not have a tsc, it will be emulated using the PIT, which is slow, so, unless you can provide another hardware timer with a lower latency, which will work starting with the I-pipe core for Linux 3.4, you should turn off CONFIG_XENO_OPT_STATS to improve latencies. -- Gilles.