Date: Mon, 26 Dec 2005 12:43:55 -0000 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Scott Long" <scottl@samsco.org>, "Jack Vogel" <jfvogel@gmail.com> Cc: Gleb Smirnoff <glebius@freebsd.org>, freebsd-stable@freebsd.org Subject: Re: em bad performance Message-ID: <003101c60a1a$0c181490$0100a8c0@multiplay.co.uk> References: <jfvogel@gmail.com> <2a41acea0512220941y61c9b5acs8053e6df8a96a1e4@mail.gmail.com> <E1Eph9s-0002F4-8O@cs1.cs.huji.ac.il><2a41acea0512251114u6cdbb439j3cb6e3ec07f97189@mail.gmail.com> <43AF660B.1030506@samsco.org>
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We have had several issues with different hardware combinations
where 1/2 duplex is an issue. Seems not all vendors implement the
standard the same way causing significant problems if the ports on
both ends aren't hard coded.
Steve
----- Original Message -----
From: "Scott Long" <scottl@samsco.org>
To: "Jack Vogel" <jfvogel@gmail.com>
Cc: "Gleb Smirnoff" <glebius@freebsd.org>; <freebsd-stable@freebsd.org>
Sent: Monday, December 26, 2005 3:39 AM
Subject: Re: em bad performance
> Jack Vogel wrote:
>> On 12/22/05, Danny Braniss <danny@cs.huji.ac.il> wrote:
>>
>>
>>>iperf -c host
>>>
>>>i'm begining to believe that the problem is elsewhere, i just put in
>>>an ethernet nic in a PCI-X/Express slot, and the performance is similar, bad.
>>>
>>>danny
>>
>>
>> Hmm, not some silly like getting set to half duplex? :)
>>
>> Jack
>
> Isn't 'half duplex' meaningless in the gigabit link protocol?
>
> Scott
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