Recommendations for 10gbps NIC

[Jack Vogel]

On Sat, Jul 27, 2013 at 9:22 AM, Andre Oppermann <andre at freebsd.org> wrote:

> On 27.07.2013 10:42, Alexander V. Chernikov wrote:
>
>> On 27.07.2013 12:15, Luigi Rizzo wrote:
>>
>>> On Sat, Jul 27, 2013 at 10:02 AM, Alexander V. Chernikov
>>> <melifaro at freebsd.org>  wrote:
>>> This makes me curious because i believe people have used netmap with
>>> the 82598 and achieved close to line rate even with 64-byte frames/one
>>> port,
>>> and i thought (maybe I am wrong ?) the various 2-port NICs use 4 lanes
>>> per port.
>>> So the number i remember does not match with your quote of 2.5Gt/s.
>>> Are all 82598 using 2.5GT/s (which is a gen.1 speed) instead of 5 ?
>>>
>> >
>
>> Quoting 82598EB datasheet:
>> The PCIe v2.0 (2.5 GT/s) interface is used by the 82598EB as a host
>> interface. It supports x8, x4,
>> x2 and x1 configurations at a speed of 2.5 GHz. The maximum aggregated
>> raw ban..
>>
>> Actually I discovered this exactly with netmap and 82598*-DA2 NIC :)
>>
>
> Discussing the 82598 is moot because it has been replaced with the 82599
> which supports x1-x8 at 5 GT/s.  AFAIK you can't event buy the 82598
> anymore.
>
>
Yes, and the new quad port adapters on PCIE Gen 3 give you 8GT/s bandwidth
for
the device. I'm not sure if you could buy the 82598 but I surely would not
recommend
it to anyone :)

Jack