Re: I've ran out of ideas

From: Arne (arne_woerner_at_yahoo.com)
Date: 11/22/04

  • Next message: Bryan Fullerton: "Re: I've ran out of ideas" 
    Date: Mon, 22 Nov 2004 06:43:14 -0800 (PST)
To: freebsd-performance@freebsd.org

    > Can't remember if I posted this to the list, but I ftp'ed /dev/zero
    > from another box on another subnet two switches away at 93Mbps
    > sustained (for three minutes). The cable, network card, network
    > driver, and network I/O is fine. I'm positive I'm hitting the
    > limitations of Apache or thttpd - but I don't know why.
    >
    > Any trace'ing tips, perhaps?
    >
    Hmm. You could try to run thttpd without the sendfile-syscall (which is
    suspicious to me, because I did not know it before):
    > cd /usr/ports/www/thttpd
    > make configure
    > vi work/thttpd-2.25b/config.h
        [remove the line, that contains USE_SENDFILE]
    > make
    > nm work/thttpd-2.25b/thttpd.o | grep sendfile | wc -l
        [the result should be "0"]

    Since thttpd tries to throttle for some reason (I thought the OS would slow
    down some send requests by inserting packets of other send requests; or isn't
    there time sharing in the ethernet drivers?), it might be interesting
    (a) to increase the values for max_bytes in lines 1740, or
    (b) to use just one single HTTP connection during the test phase (in that case
    throttling should be disabled)...

    -Arne

                    
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  • Next message: Bryan Fullerton: "Re: I've ran out of ideas"