From owner-freebsd-questions@FreeBSD.ORG Tue Dec 21 15:09:38 2010 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1BA68106564A for ; Tue, 21 Dec 2010 15:09:37 +0000 (UTC) (envelope-from aimass@yabarana.com) Received: from mail-ww0-f50.google.com (mail-ww0-f50.google.com [74.125.82.50]) by mx1.freebsd.org (Postfix) with ESMTP id 782048FC1D for ; Tue, 21 Dec 2010 15:09:36 +0000 (UTC) Received: by wwf26 with SMTP id 26so3869788wwf.31 for ; Tue, 21 Dec 2010 07:09:36 -0800 (PST) MIME-Version: 1.0 Received: by 10.227.135.13 with SMTP id l13mr3449207wbt.84.1292944176164; Tue, 21 Dec 2010 07:09:36 -0800 (PST) Sender: aimass@yabarana.com Received: by 10.227.145.133 with HTTP; Tue, 21 Dec 2010 07:09:36 -0800 (PST) In-Reply-To: <4D109BE3.3000703@herveybayaustralia.com.au> References: <4D0D8AEA.2070309@herveybayaustralia.com.au> <20101219135712.08374097@gumby.homeunix.com> <4D109BE3.3000703@herveybayaustralia.com.au> Date: Tue, 21 Dec 2010 10:09:36 -0500 X-Google-Sender-Auth: jTpHomSwZ7gc-MYl0GAWGQguQZ4 Message-ID: From: Alejandro Imass To: Da Rock Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: freebsd-questions@freebsd.org Subject: Re: Realtime X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 21 Dec 2010 15:09:38 -0000 On Tue, Dec 21, 2010 at 7:21 AM, Da Rock wrote: > On 12/19/10 23:57, RW wrote: >> >> On Sun, 19 Dec 2010 14:32:42 +1000 >> Da Rock =A0wrote: [...] > > Bugger! I was hoping there was more to it than that... I've read that > already. > Yeah I was left with the same feeling after tagging your thread for follow-up. The man says that it derives from the HP-UX model so maybe there are some references to that, and we shoudl start there. I would like to know what the exact differences are with nice. I was expecting to find for example, the rtprio value to be in actual time units, question: is there a correlation to the number and a concrete RT value say cpu cycles or so? Is there a way to calculate the the minimum expected timeslice or the maximum time to re-schedule. For example, in PLC design you usually have to guarantee that you will evaluate a certain number of ladder instruction in a maximum amount of time, say 1000 ladder instructions in a worst case of 100ms. So the question is if this is rt scheduling then there must be a correlation with rt units. I don't have much time but I will try to research this soon.... > Thanks > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.o= rg" >