Date: Thu, 21 Sep 2006 20:31:05 +0200 (CEST) From: Oliver Fromme <olli@lurza.secnetix.de> To: freebsd-hackers@FreeBSD.ORG Subject: Re: numbers don't lie ... Message-ID: <200609211831.k8LIV57C040532@lurza.secnetix.de> In-Reply-To: <E1GQPpL-000IWx-R9@cs1.cs.huji.ac.il>
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Danny Braniss wrote: > you might have a point, but this started when I asked why, two > boxes, under similar test gave idential real times, but very different > user times. Right, and the answer was: One box has a much faster CPU, so it's user time is smaller, but buildworld isn't purely CPU-bound, and because of I/O delays the real times end up to be about the same. In other words: The faster box had to wait more often for the disk than the slower box. If both of your machines have enough RAM, it would be interesting to repeat the test with /usr/src being in a RAM disk, so read I/O doesn't play that much of a role. Best regards Oliver PS: Numbers don't lie ... but are often misinterpreted. -- Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing Dienstleistungen mit Schwerpunkt FreeBSD: http://www.secnetix.de/bsd Any opinions expressed in this message may be personal to the author and may not necessarily reflect the opinions of secnetix in any way. "Life is short (You need Python)" -- Bruce Eckel, ANSI C++ Comitee member, author of "Thinking in C++" and "Thinking in Java"
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