From owner-cvs-all Sun Dec 23 11: 1: 4 2001 Delivered-To: cvs-all@freebsd.org Received: from whizzo.transsys.com (whizzo.TransSys.COM [144.202.42.10]) by hub.freebsd.org (Postfix) with ESMTP id C3D2B37B41A; Sun, 23 Dec 2001 11:00:56 -0800 (PST) Received: from whizzo.transsys.com (#6@localhost.transsys.com [127.0.0.1]) by whizzo.transsys.com (8.11.6/8.11.6) with ESMTP id fBNJ0u745326; Sun, 23 Dec 2001 14:00:56 -0500 (EST) (envelope-from louie@whizzo.transsys.com) Message-Id: <200112231900.fBNJ0u745326@whizzo.transsys.com> X-Mailer: exmh version 2.5 07/13/2001 with nmh-1.0.4 To: Robert Watson Cc: Greg Lehey , Bruce Evans , Matt Dillon , cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, FreeBSD Core Team X-Image-URL: http://www.transsys.com/louie/images/louie-mail.jpg From: "Louis A. Mamakos" Subject: Re: cvs commit: src/sys/dev/sio sio.c References: In-reply-to: Your message of "Sun, 23 Dec 2001 12:33:12 EST." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Sun, 23 Dec 2001 14:00:56 -0500 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 It's been a couple of years since I did an experiment to measure interrupt latency, and that on FreeBSD 3.2-CURRENT base. Here we are two years later, and it's unclear that end-users are likely to see any significant improvement in their end-user experience. Having the end-user suffer from continuing serial I/O input silo errors hardly seems like a useful result. Surely this email thread will be a much more effective reminder of the interrupt latency issue than the silo overflow printf's from the sio driver. So, speaking as a FreeBSD end-user - please fix the behavior that I see by the unclean, un-holy, and architecturally bankrupt expediant hack of changing the input silo theshold. This is seems to be morally offensive to some; perhaps that will serve as motivation to fix the underlying cause rather than just ignoring it. I'm all for curing the disease rather than just treating the symptoms, but this aching pain has gone on for quite a while when a simple work-around is readily available. There must be more offensive crocks on the FreeBSD source tree to get wound-up over than this. louie To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message