From mboxrd@z Thu Jan 1 00:00:00 1970 From: Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= Subject: Re: cyclictest abstime vs. reltime Date: Thu, 18 Dec 2014 09:22:19 +0100 Message-ID: <20141218082219.GC10857@pengutronix.de> References: <20141217151650.6ee5649c@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: linux-rt-users@vger.kernel.org, Marcelo Tosatti , williams@redhat.com, riel@redhat.com To: Luiz Capitulino Return-path: Received: from metis.ext.pengutronix.de ([92.198.50.35]:44941 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751501AbaLRIWV (ORCPT ); Thu, 18 Dec 2014 03:22:21 -0500 Content-Disposition: inline In-Reply-To: <20141217151650.6ee5649c@redhat.com> Sender: linux-rt-users-owner@vger.kernel.org List-ID: Hello Luiz, On Wed, Dec 17, 2014 at 03:16:50PM -0500, Luiz Capitulino wrote: > So, my question boils down to: is there a relevant difference between > the two modes? Why isn't reltime the default mode? I don't know, but I think in reality you want abstime. Consider a proce= ss that does something with items that pass at your machine on a belt conv= eyor. Then you need to handle one item (say) each 200ms and using reltime mea= ns that your latencies add and even with a latency of 1=B5s you'd miss approx. 1 item per year. Best regards Uwe --=20 Pengutronix e.K. | Uwe Kleine-K=F6nig = | Industrial Linux Solutions | http://www.pengutronix.de/= | -- To unsubscribe from this list: send the line "unsubscribe linux-rt-user= s" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html