From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S270368AbTGMTsP (ORCPT ); Sun, 13 Jul 2003 15:48:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S270370AbTGMTsP (ORCPT ); Sun, 13 Jul 2003 15:48:15 -0400 Received: from humbolt.nl.linux.org ([131.211.28.48]:4286 "EHLO humbolt.nl.linux.org") by vger.kernel.org with ESMTP id S270368AbTGMTsO (ORCPT ); Sun, 13 Jul 2003 15:48:14 -0400 From: Daniel Phillips To: William Lee Irwin III , Con Kolivas Subject: Re: [RFC][PATCH] SCHED_ISO for interactivity Date: Sun, 13 Jul 2003 22:03:55 +0200 User-Agent: KMail/1.5.2 Cc: linux kernel mailing list References: <200307112053.55880.kernel@kolivas.org> <20030712154924.GC15452@holomorphy.com> In-Reply-To: <20030712154924.GC15452@holomorphy.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200307132203.55414.phillips@arcor.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Saturday 12 July 2003 17:49, William Lee Irwin III wrote: > On Fri, Jul 11, 2003 at 08:53:38PM +1000, Con Kolivas wrote: > > Wli coined the term "isochronous" (greek for same time) for a real time > > task that was limited in it's timeslice but still guaranteed to run. I've > > decided to abuse this term and use it to name this new policy in this > > patch. This is neither real time, nor guaranteed. > > I didn't coin it; I know of it from elsewhere. Right, for example, USB has an isochronous transfer facility intended to support media applications, e.g., cameras, that require realtime bandwidth/latency guarantees. The thing is, such guarantees have to be end-to-end in the media pipeline. Sound is just one of the applications that needs the kind of realtime support we (or more properly, Davide) just proposed. Regards, Daniel