Date: Fri, 16 Nov 2001 15:32:53 -0500 (EST) From: Nguyen-Tuong Long Le <le@cs.unc.edu> To: <net@freebsd.org> Subject: Periodic task Message-ID: <Pine.LNX.4.32.0111161532070.10128-100000@le-cs.cs.unc.edu>
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Hi all, I run experiments to measure the stability of router queue length. In my experiment set up, I have 7 clients and 7 servers connected to a router via an ELS-100 switch. The 7 clients and 7 servers establish long-lived TCP connections and saturate the router's 10 Mbit link. All machines run FreeBSD 4.3 with the router having the ALTQ 3.0 patch (http://www.csl.sony.co.jp/person/kjc/programs.html). There seems to be some periodic tasks that occur every 20 minutes and draws the queue length to 0. I run several experiments and consistently observe the same pattern. I don't have any cron job on the machines. I have a graph of the router's queue length at http://www.cs.unc.edu/~le/tmp/qlen.png Does anyone know what the problem is and how to solve it? Please kindly reply to me because I am not on the list. Thanks, Long To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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