netdev - Re: what is the expeted performance from a dual port 10G card ?

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Message-ID: <5d96567b0811290011u58f4c9bj93d6c781b67b91ad@mail.gmail.com>
Date:	Sat, 29 Nov 2008 10:11:54 +0200
From:	Raz <raziebe@...il.com>
To:	"Divy Le Ray" <divy@...lsio.com>
Cc:	netdev@...r.kernel.org
Subject: Re: what is the expeted performance from a dual port 10G card ?

On Sat, Nov 29, 2008 at 8:30 AM, Divy Le Ray <divy@...lsio.com> wrote:
> Raz wrote:
>> Hello
>> I have been testing 10G ethernet cards , intel ixgbe, chelsio, tehuti
>> and melanox . All are dual port cards.
>> I have used pktgen to test it. A single cpu is mapped over a single
>> interface (no neeed for MQ , which is quite bad anyway).
>> Results:
>> Intel gives: 13Gbps , 6.5 from each port.
>> The rest give ~10 Gbps .
>> Cards were tested on PCI-E x8 slot, on a supermicro x7DBI and
>> supermicro 1025W-UR.
>>
>> Am i to expect ~20Gbps from each card ?
>
> Hi Raz,
>
> For the rest, what is the load balance between the ports?
> The Chelsio adapter shares the pci link between all ports.
>
> Cheers,
> Divy
>
All ports share the same bandwidth. in chelsio it is 4.8 Gbps from each port.
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