From owner-freebsd-hackers Fri Jun 6 13:47:00 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id NAA11312 for hackers-outgoing; Fri, 6 Jun 1997 13:47:00 -0700 (PDT) Received: from pluto.plutotech.com (root@pluto100.plutotech.com [206.168.67.137]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id NAA11307 for ; Fri, 6 Jun 1997 13:46:58 -0700 (PDT) Received: from narnia.plutotech.com (narnia.plutotech.com [206.168.67.130]) by pluto.plutotech.com (8.8.5/8.8.5) with ESMTP id OAA01894; Fri, 6 Jun 1997 14:46:43 -0600 (MDT) Message-Id: <199706062046.OAA01894@pluto.plutotech.com> X-Mailer: exmh version 2.0beta 12/23/96 To: Bob Bishop cc: "Justin T. Gibbs" , freebsd-hackers@FreeBSD.ORG Subject: Re: Extremely poor interactive response under heave SCSI load In-reply-to: Your message of "Fri, 06 Jun 1997 21:23:23 BST." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Fri, 06 Jun 1997 15:45:08 -0600 From: "Justin T. Gibbs" Sender: owner-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk >At 21:34 +0100 6/6/97, Justin T. Gibbs wrote: >>Even better hack. Just send an ordered transaction every once in a while >>which will flush any "starved" simple-tagged transactions. This means that >>you can always keep the queue full. > >Is that [slipping in an ordered transaction when there's a bunch of >unordered transactions 'up the pipe'] actually going to work as desired >for all the controllers of interest? If you don't have a tagged queueing controller/device combination, than the problem you brought up doesn't apply. If you do, the spec mandates that order tags be supported and sending one will have the desired effect. >-- >Bob Bishop (0118) 977 4017 international code +44 118 >rb@gid.co.uk fax (0118) 989 4254 between 0800 and 1800 UK -- Justin T. Gibbs =========================================== FreeBSD: Turning PCs into workstations ===========================================