From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4C47F932.3060400@domain.hid> Date: Thu, 22 Jul 2010 09:54:26 +0200 From: Gilles Chanteperdrix MIME-Version: 1.0 References: <4C46D49F.6030102@domain.hid> <4C46F0D9.4030906@domain.hid> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai-help] Unexpected preemption of highest priority thread List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Stephen Bryant Cc: xenomai@xenomai.org Stephen Bryant wrote: > On 21 July 2010 14:06, Gilles Chanteperdrix > > wrote: > > Stephen Bryant wrote: > > I've had a look at dmesg, but cannot find any references to SMI - what > > should I be looking for? > > What is described in the TROUBLESHOOTING file. > > > I have tried disabling the SMI workaround, ensuring that SMI detection > is not disabled, and logging the kernel output (setting the kernel log > level to 8 in grub and sending the output to the serial port to be > picked up by another machine). The troubleshooting file states that I > should see "Xenomai: Intel chipset found and SMI workaround not > enabled, you may encounter high interrupt latencies." in this output, > however this does not occur - I am using an Intel Core 2 Duo but with > SMP disabled, if this has any relevance. The SMI detection/workaround is based on the chipset you have. If your chipset is an ICH10, Stefan posted a patch a few days ago. If it is another one, then please send us the result of lspci -vv on your target. -- Gilles.