Date: Tue, 30 Jun 1998 01:55:51 -0400 (EDT) From: Snob Art Genre <benedict@echonyc.com> To: Yee Man Chan <ymc@eecs.umich.edu> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: client-server problem Message-ID: <Pine.GSO.3.96.980630015211.7127A-100000@echonyc.com> In-Reply-To: <Pine.GSO.3.96.980629221622.1437A-300000@shivam.eecs.umich.edu>
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On Mon, 29 Jun 1998, Yee Man Chan wrote: > Here is how the program performs under FreeBSD 3.0-CURRENT with different > n: > 1-100 Very fast > 101-207 Very Slow (This range is the strangest I've ever seen) > 208-1024 Very fast (just like 1-100) > >1024 strange errors like unknown host or connection timedout > > Any clue? I don't know about your >1024 problems, but the rest is explainable. It has to do with the way memory is allocated in the kernel for network i/o. I don't remember the exact details, but it's all put forth quite clearly in W. Richard Stevens' _TCP/IP Illustrated Vol. 3_, with graphs and everything. Are you using TCP or UDP? What kind of link are you going over? Ben "You have your mind on computers, it seems." To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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