From owner-cvs-all Sat Dec 22 18:48:59 2001 Delivered-To: cvs-all@freebsd.org Received: from niwun.pair.com (niwun.pair.com [209.68.2.70]) by hub.freebsd.org (Postfix) with SMTP id 988D337B41B for ; Sat, 22 Dec 2001 18:48:43 -0800 (PST) Received: (qmail 55776 invoked by uid 3193); 23 Dec 2001 02:48:42 -0000 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 23 Dec 2001 02:48:42 -0000 Date: Sat, 22 Dec 2001 21:48:42 -0500 (EST) From: Mike Silbersack X-Sender: To: Bruce Evans Cc: Matt Dillon , , Subject: Re: cvs commit: src/sys/dev/sio sio.c In-Reply-To: <20011223132947.K10139-100000@gamplex.bde.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII 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 On Sun, 23 Dec 2001, Bruce Evans wrote: > This setting is intentional. The default setting provides twice as much > slop as the 8250 UARTs which the driver was designed to support on systems > hundreds of times slower than current ones. Making it twice as large > again doesn't help much. > > This commit will was not approved or even sent for review to the maintainer > and will be backed out in a minute. > > Bruce Ok, I'll buy into the idea that we shouldn't have interrupt latency. However, people have indicated that more frequent interrupts solve their overflow problems. Is there real harm in using more frequent interrupts? If no, then Matt's change should be left in. If yes, explain why. References to old hardware are not relevant - the performance of 4.5-prerelease on modern hardware are. Thanks, Mike "Silby" Silbersack To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message