Re: tcp troughput weirdness

From: David Malone (dwmalone_at_maths.tcd.ie)
Date: 07/12/05

  • Next message: Noritoshi Demizu: "Re: tcp troughput weirdness" 
    To: Danny Braniss <danny@cs.huji.ac.il>
Date: Tue, 12 Jul 2005 10:48:24 +0100

    > did the trick! now can someone remind me what inflight does? and could
    > someone explain why increasing sendspace alone did not do the trick?
    > (i had it at 64k, which got things better, but not sufficient).

    TCP inflight limiting is supposed to guess the bandwidth-delay
    product for a TCP connection and stop the window expanding much
    above this. It's a pretty neat idea for DSL links that often have
    huge buffers at the far end, where inflight limiting can prevent
    delays to interactive traffic.

    However, some of the guys I know that work on TCP dynamics reckon
    that they can they can come up with situations where inflight
    limiting will break. Unfortunately, I haven't had time to talk
    this through with them. I guess you may have found one of those
    situations ;-)

            David.
    _______________________________________________
    freebsd-net@freebsd.org mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-net
    To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"

  • Next message: Noritoshi Demizu: "Re: tcp troughput weirdness"

    Relevant Pages

    • Re: tcp troughput weirdness
      ... > someone explain why increasing sendspace alone did not do the trick? ... TCP inflight limiting is supposed to guess the bandwidth-delay ...
      (freebsd-stable)
    • Re: tcp troughput weirdness
      ... > TCP inflight limiting is supposed to guess the bandwidth-delay ... > product for a TCP connection and stop the window expanding much ... > huge buffers at the far end, where inflight limiting can prevent ...
      (freebsd-net)
    • Re: tcp troughput weirdness
      ... > TCP inflight limiting is supposed to guess the bandwidth-delay ... > product for a TCP connection and stop the window expanding much ... > huge buffers at the far end, where inflight limiting can prevent ...
      (freebsd-stable)