FreeBSD 4.x and OS-X tcp performance

From: Charles Sprickman (spork_at_fasttrackmonkey.com)
Date: 03/04/05

  • Next message: Darcy Buskermolen: "Re: FreeBSD 4.x and OS-X tcp performance" 
    Date: Fri, 4 Mar 2005 17:34:35 -0500 (EST)
To: freebsd-net@freebsd.org

    Howdy,

    Sorry to bring what seems like a simple issue up here. I had been blaming
    slow afp filesharing between my OS-X (10.3.8 and previous) and FreeBSD 4.x
    boxes on netatalk's afp implementation for some time. Not too long ago I
    got frustrated with this and tried smb and then ftp. On a simple 10/100
    network, and even with just a crossover between two boxes it seems that
    any tcp transfer tops out at around 250KB/s.

    On the same network using the same switch I can get near line-rate to an
    OpenBSD box and to another OS-X box.

    If I use nfs and force udp as the transport, I *do* get near line-rate
    between OS-X and FBSD.

    My 5.3 box is tanked at the moment, so I cannot tell if the problem
    happens there as well. I do have a full ADC account, so I will be testing
    with the latest Tiger preview shortly, and the ADC access does give me a
    decent bug reporting facility if the fault lies within the OS-X tcp stack.

    I'm no tcpdump wizard, would anyone care to help me track this down?

    Thanks,

    Charles
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  • Next message: Darcy Buskermolen: "Re: FreeBSD 4.x and OS-X tcp performance"