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Date:      Thu, 4 Feb 1999 16:05:42 -0800 (PST)
From:      Matthew Dillon <dillon@apollo.backplane.com>
To:        "Dirk-Willem van Gulik (vaio)" <dirkx@webweaving.org>
Cc:        freebsd-hackers@FreeBSD.ORG
Subject:   Re: Irratic Curve
Message-ID:  <199902050005.QAA91618@apollo.backplane.com>
References:   <36B97B38.74FF0B68@webweaving.org>

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:...
: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

    If you want a transactional connection over TCP to go fast, you generally
    have to turn off nagle.

    {
	int one = 1;
	setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one));
    }

    If the connection is pipelined, it can be a different story.

					-Matt

					Matthew Dillon 
					<dillon@backplane.com>

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