Re: tcp troughput weirdness
From: Luigi Rizzo (rizzo_at_icir.org)
Date: 07/12/05
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Date: Mon, 11 Jul 2005 23:42:16 -0700 To: Danny Braniss <danny@cs.huji.ac.il>
we need more data points -
did you test tcp or udp ?
who is sourcing data ?
are the bandwidth symmetric (i.e. A-> same as B -> A ?
cheers
luigi
On Tue, Jul 12, 2005 at 09:21:13AM +0300, Danny Braniss wrote:
> while checking out the quality of a switch, I came about a very disturbing
> dicovery: FreeBSD <-> Linux througput is MUCH better than FreeBSD <-> FreeBSD
>
> Setup:
> 2 blades in the same bladeserver, A running FreeBSD 5.4, B running Linux
> C is running FreeBSD 5.4
> all are connected at 1gb.
>
> A -+ (FreeBSD)
> |
> B -+ (Linux)
> |
> [switch]
> |
> +---- [router] --- C (FreeBSD)
> A & B are on the same Vlan.
>
> iperf results:
> Interval Transfer Bandwidth
>
> A <=> B 0.0-10.0 sec 1.09 GBytes 939 Mbits/sec
>
> A <=> C 0.0-10.0 sec 515 MBytes 432 Mbits/sec
>
> B <=> C 0.0-10.0 sec 1.07 GBytes 918 Mbits/sec
>
> I've run the tests several times, and the numbers are very similar,
> so BIG Question: is there anything that can be tunned on the FreeBSD to
> better the throughput?
>
> danny
>
>
>
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