From owner-cvs-all Tue Dec 25 19:52:25 2001 Delivered-To: cvs-all@freebsd.org Received: from ns.yogotech.com (ns.yogotech.com [206.127.123.66]) by hub.freebsd.org (Postfix) with ESMTP id 214B737B419; Tue, 25 Dec 2001 19:52:21 -0800 (PST) Received: from caddis.yogotech.com (caddis.yogotech.com [206.127.123.130]) by ns.yogotech.com (8.9.3/8.9.3) with ESMTP id UAA02188; Tue, 25 Dec 2001 20:51:28 -0700 (MST) (envelope-from nate@yogotech.com) Received: (from nate@localhost) by caddis.yogotech.com (8.11.6/8.11.6) id fBQ3pI104841; Tue, 25 Dec 2001 20:51:18 -0700 (MST) (envelope-from nate) From: Nate Williams MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15401.18742.50318.472163@caddis.yogotech.com> Date: Tue, 25 Dec 2001 20:51:18 -0700 To: Matthew Dillon Cc: Poul-Henning Kamp , Peter Jeremy , David Greenman , Bruce Evans , Mike Silbersack , cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/dev/sio sio.c In-Reply-To: <200112241019.fBOAJDO05785@apollo.backplane.com> References: <83382.1009180276@critter.freebsd.dk> <200112241019.fBOAJDO05785@apollo.backplane.com> X-Mailer: VM 6.96 under 21.1 (patch 14) "Cuyahoga Valley" XEmacs Lucid Reply-To: nate@yogotech.com (Nate Williams) Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG > In anycase, the difference between MEDH and HIGH is that MEDH gives > us 8 character times of slop before the FIFO overflows, while HIGH > gives us only 2 character times. For what it's worth, Windows (in all of it's incarnations) sets the trigger level to FreeBSD's old version (14) on 16550s, and people don't seem to have any problems with it. The implication is pretty sad when Windows 95/98/ME/NT/2K/XP *all* have better interrupt latency than FreeBSD. :( Nate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message