From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <53B54DEA.9020306@xenomai.org> Date: Thu, 03 Jul 2014 14:34:50 +0200 From: Gilles Chanteperdrix MIME-Version: 1.0 References: <7016-53b1af80-3d5-7f54e300@12077259> <53B1B529.9040106@xenomai.org> <20140701083910.GA28764@dmia-degroote.isae.fr> <53B27E5B.10507@xenomai.org> <20140701155123.GA5547@dmia-degroote.isae.fr> <53B30A78.40605@xenomai.org> <20140702114142.GA13439@dmia-degroote.isae.fr> <53B44879.5020203@xenomai.org> <20140703083807.GA10654@dmia-degroote.isae.fr> In-Reply-To: <20140703083807.GA10654@dmia-degroote.isae.fr> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai] Support of Beagleboard xm rev C on 3.14-ipipe List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Arnaud Degroote Cc: xenomai@xenomai.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 07/03/2014 10:38 AM, Arnaud Degroote wrote: > On 02/Jul - 19:59, Gilles Chanteperdrix wrote: >> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 >> >> >> Well, this sucks, posted writes increase the timer programming >> latency. >> >> Does the latency test run correctly with this patch? > > Yes, the latency test seems to work properly. That is strange, because the Xenomai timer also uses non-posted writes. > > I need to investigate a bit more, because the kernel without the > patch seems to work properly with a different uboot (the one for my > gumstix) while it hangs with the uboot for my beagleboard. Perhaps the u-boot which works implement some workaround for processor errata, which the u-boot which does not work does not implement? - -- Gilles. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Icedove - http://www.enigmail.net/ iD8DBQFTtU3qGpcgE6m/fboRAiaqAJ0Z1HWfwSTosuDNn2Y/Rm2mwPOBlACfYNwl UQCwKjRsGTtoDwMAAWHMTUs= =XtNR -----END PGP SIGNATURE-----