Date: Sun, 28 Feb 1999 22:52:43 -0600 From: "Matthew D. Fuller" <fullermd@futuresouth.com> To: David Kelly <dkelly@hiwaay.net>, freebsd-stable@FreeBSD.ORG Subject: Re: rc5des slows tape thruput Message-ID: <19990228225243.W3203@futuresouth.com> In-Reply-To: <199903010357.VAA00388@nospam.hiwaay.net>; from David Kelly on Sun, Feb 28, 1999 at 09:57:44PM -0600 References: <mjacob@feral.com> <199903010357.VAA00388@nospam.hiwaay.net>
next in thread | previous in thread | raw e-mail | index | archive | help
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?19990228225243.W3203>