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

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Date:	Fri, 28 Nov 2008 22:30:27 -0800
From:	Divy Le Ray <divy@...lsio.com>
To:	Raz <raziebe@...il.com>
CC:	netdev@...r.kernel.org
Subject: Re: what is the expeted performance from a dual port 10G card ?

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
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