From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 29 Jan 2015 13:25:04 +0100 From: Gilles Chanteperdrix Message-ID: <20150129122504.GC2698@hermes.click-hack.org> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Subject: Re: [Xenomai] ToD drift on i7-3740QM List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Roland Pastorino Cc: xenomai@xenomai.org On Sun, Jan 25, 2015 at 12:15:39PM +0100, Roland Pastorino wrote: > Good morning everyone, > > I would like to know if some of you could give me a hint on how to > solve my ToD drift problem. > This question is similar to this one -> > http://comments.gmane.org/gmane.linux.real-time.xenomai.users/19719 > > Problem: > After installing Xenomai and after the first reboot, my ToD drift was > around 500000 us/s. > After the second reboot, my ToD drift is around 500 us/s which I > presume is still too high. > I checked the troubleshooting information on Xenomai website but it didn't help. > > Machine and configuration: > - PC = Thinkpad w530 > - cpu = i7-3740QM > - kernel configuration file is attached. I followed the Xenomai > website for the configuration. > - cobalt kernel of Xenomai 3 > - Linux kernel 3.16 > - ipipe-core-3.16-x86-1.patch > - Ubuntu 14.10 Actually, the kernel configuration is not attached. But probably the only interesting item is whether CONFIG_CPU_FREQ is missing. -- Gilles.