From owner-freebsd-hackers Thu Feb 4 02:58:21 1999 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id CAA24341 for freebsd-hackers-outgoing; Thu, 4 Feb 1999 02:58:21 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from vaio.ispra.webweaving.org ([157.150.122.87]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id CAA24313 for ; Thu, 4 Feb 1999 02:58:12 -0800 (PST) (envelope-from dirkx@webweaving.org) Received: from webweaving.org (localhost [127.0.0.1]) by vaio.ispra.webweaving.org (8.8.8/8.8.8) with ESMTP id LAA00660 for ; Thu, 4 Feb 1999 11:49:33 +0100 (CET) (envelope-from dirkx@webweaving.org) X-MX-Masquarade: Passed MX vaio.ispra.webweaving.org at Vaio / WebWeaving X-No-Spam: Neither the originator(s) address(es) nor the Receipient(s) addresses are to be used for unsolicited commercial email (spam) as a per message fee is incurred for both inbound and outbound traffic Message-ID: <36B97B38.74FF0B68@webweaving.org> Date: Thu, 04 Feb 1999 11:49:28 +0100 From: "Dirk-Willem van Gulik (vaio)" Organization: Web Weaving Consultancy X-Mailer: Mozilla 4.5 [en] (X11; I; FreeBSD 2.2.6-RELEASE i386) X-Accept-Language: zh, nl, en MIME-Version: 1.0 To: freebsd-hackers@FreeBSD.ORG Subject: Irratic Curve Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Whilst playing with a small, but fast, berkely DB based transaction server; which sits on a tcp/ip socket connection I ran into sometimes unpredictable reply times. One of the major problem was solved by increasing the MSIZE to 256 (the 103 bytes+ delayed ack problem). Now recently I came across: http://www.scl.ameslab.gov/Projects/Gigabit/performance/prelim.html Now could any one explain to me WHY freebsd appears so unpredicatable ? i.e. not a nice S-curve ? Is that the way of measuring ? Some other artifact, or real ? I think it is real, as I get the same sort of holes in my graphs for the transaction server. Any chances on an expose.... Dw To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message