From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Schwebel Subject: Re: AMP on an SMP system Date: Fri, 2 Aug 2013 13:42:25 +0200 Message-ID: <20130802114225.GR3880@pengutronix.de> References: <51FB6EE1.3090708@lumino.de> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <51FB6EE1.3090708@lumino.de> Sender: linux-embedded-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Michael Schnell Cc: linux-embedded@vger.kernel.org On Fri, Aug 02, 2013 at 10:33:37AM +0200, Michael Schnell wrote: > Is there a kind of "official" way to set aside one of the available > cores in an SMP system from the Linux OS to do deeply embedded > extremely-low-latency stuff in a kind of single task "main loop" type > environment ? I.e. creating a true coprocessor from an SMP hardware. Before hacking around (which might also lead to interesting solutions), I would start using a kernel with preempt-rt support and play with the cpu affinity: http://lxr.linux.no/#linux+v3.10.4/Documentation/kernel-parameters.txt#L1257 rsc -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |