From owner-freebsd-stable Sun Feb 28 20:53: 4 1999 Delivered-To: freebsd-stable@freebsd.org Received: from shell.futuresouth.com (shell.futuresouth.com [198.78.58.28]) by hub.freebsd.org (Postfix) with ESMTP id A0BCE15230 for ; Sun, 28 Feb 1999 20:53:01 -0800 (PST) (envelope-from fullermd@futuresouth.com) Received: (from fullermd@localhost) by shell.futuresouth.com (8.9.1a/8.9.1) id WAA12380; Sun, 28 Feb 1999 22:52:43 -0600 (CST) Message-ID: <19990228225243.W3203@futuresouth.com> Date: Sun, 28 Feb 1999 22:52:43 -0600 From: "Matthew D. Fuller" To: David Kelly , freebsd-stable@FreeBSD.ORG Subject: Re: rc5des slows tape thruput References: <199903010357.VAA00388@nospam.hiwaay.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.93.2i In-Reply-To: <199903010357.VAA00388@nospam.hiwaay.net>; from David Kelly on Sun, Feb 28, 1999 at 09:57:44PM -0600 X-OS: FreeBSD Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sun, Feb 28, 1999 at 09:57:44PM -0600, a little birdie told me that David Kelly remarked > > But Friday night was getting half this thruput. Fired up X and repeated. > Essentially the same results. Then fired up rc5des, which is niced and > fell to an average of 185k/sec. Snipped from top: > > 294 dkelly 105 20 740K 520K RUN 9:58 97.95% 97.95% rc5des One thing to bear in mind is that a process nice'd to 20 still gets CPU time allotted. I always idprio rc5des and friends. For instance, in this case, run (as root, I think you have to) idprio 31 -294 Then it'll show up as nice 52, and ONLY use idle CPU cycles, instead of having an (albeit small) slice of cycles always allocated it. No, I don't think it's 'good' that nice'd to 20 it slows the tape by that much, but this is at least a partial workaround (and the better way to do it IMO anyway). Have you tried running rc5des under 2.2.5 and seeing what speed you got? --- *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* | Matthew Fuller http://www.over-yonder.net/~fullermd | * fullermd@futuresouth.com fullermd@over-yonder.net * | UNIX Systems Administrator Specializing in FreeBSD | * FutureSouth Communications ISPHelp ISP Consulting * | "The only reason I'm burning my candle at both ends, | * is because I haven't figured out how to light the * | middle yet" | *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message