Re: FreeBSD 4.x and OS-X tcp performance

From: Mark Tinguely (tinguely_at_casselton.net)
Date: 03/11/05

  • Next message: Luigi Rizzo: "Re: Giant-free polling [PATCH]" 
    Date: Fri, 11 Mar 2005 08:59:40 -0600 (CST)
To: demizu@dd.iij4u.or.jp, freebsd-net@freebsd.org

    on Fri, 11 Mar 2005 20:20:02 +0900 (JST), Noritoshi Demizu said:

    > ack 4195629532 win 5792 (-) <- Original ACK
    > ack 4195629532 win 6576 (+784) <- dup ACK (with window update)
    > ack 4195629532 win 6576 (0) <- dup ACK
    > ack 4195629532 win 7240 (+664) <- dup ACK (with window update)
    > ack 4195629532 win 10672 (+3432) <- window update

    The Apple machine may be rate limiting their transmissions. The Apple is
    sending only 2 packets per round trip time. After the packet is lost,
    that gap allows the FreeBSD to consume some data before sending the 3rd
    duplicate ACKs and so it has a window changes.

    --Mark.
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  • Next message: Luigi Rizzo: "Re: Giant-free polling [PATCH]"

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