[Users] How to make the best use of a dual port HCA

[Orion Poplawski]

On 04/29/2013 12:05 PM, Paul Grun wrote:
> Be aware that you may be limited by PCIe bandwidth, so connecting both ports may not deliver a significant improvement in b/w performance.
>

Yeah, that is my concern.  Are there any good tools for testing the "raw" IB 
bandwidth using both ports?  It seems like tools like rdma_bw operate over 
just one port.

> -----Original Message-----
> From: users-bounces at lists.openfabrics.org [mailto:users-bounces at lists.openfabrics.org] On Behalf Of Orion Poplawski
> Sent: Monday, April 29, 2013 10:31 AM
> To: users at lists.openfabrics.org
> Subject: [Users] How to make the best use of a dual port HCA
>
> I'm just getting starting with setting up an infiniband network.  I have several dual port DDR cards and am wondering what is the best way to make use of them.  If I connect both ports on each card to the switch will I automatically get improved bandwidth or does anything need to get configured?
>    What is the best way to configure IPoIB in this configuration?  I've seen mention of using bonding, is this worthwhile?
>
> I've not yet been able to find a good guide that mentions dual port cards.
>
> Thanks!
>
> --
> Orion Poplawski
> Technical Manager                     303-415-9701 x222
> NWRA, Boulder/CoRA Office             FAX: 303-415-9702
> 3380 Mitchell Lane                       orion at nwra.com
> Boulder, CO 80301                   http://www.nwra.com
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-- 
Orion Poplawski
Technical Manager                     303-415-9701 x222
NWRA, Boulder/CoRA Office             FAX: 303-415-9702
3380 Mitchell Lane                       orion at nwra.com
Boulder, CO 80301                   http://www.nwra.com