[mvapich-discuss] MVAPICH2 and Broadcom 5706

[Dhabaleswar Panda]

Thanks for your note and interest in running MVAPICH2 with Broadcom 5706's
iWARP support. At this point of time, we have not tested this combination
because we do not have access to these Broadcom adapters.  You may check
with the Broadcom folks to see whether they have done this testing
internally or not. If Broadcom 5706's iWARP suppoort is strictly iWARP
standard compliant, it should work.

Thanks,

DK

On Fri, 6 Feb 2009 paolo.zini at ipcf.cnr.it wrote:

> Hi all.
>
> My name is  Paolo, I am in Pisa, Italy.
>
> I have a maybe stupid question, but I am new here, be patient.
>
> I have a small cluster, 16 nodes based on dual opteron machines with gigabit
> network, used for parallel computations.
>
> I use Suse 10 and mpich2 on it.
>
> The problem is that the delay introduced by the TCP stack affects the system
> efficiency.
>
> I would like to improve it, using MVAPICH2, but the budget available is
> small.
>
> According to tests found in literature, using MPI with Ammasso cards would
> reduce the delay to 20 - 30 microseconds.
>
> This would be interesting for me, because the communication requirements
> anren't so high...
>
> If  I understand, now Ammasso cards are available only on Ebay. the idea
> would be to install low cost Broadcom gigabit cards, based on 5706 chip.
>
> Broadcom claims that 5706 and 5708 are iWARP compliant, MVAPICH2 supports
> iWARP hardware, MVAPICH2 have been used with gigabit nets using Ammasso
> cards, but I haven't found any experience based on Broadcom cards.
>
> Can I install Broadcom cards, MVAPICH2 and use RDMA?
>
>
>
> Can anyone enlighten me?
>
>
>
> Tank you for any help.
>
>
>
> Paolo Zini
> IPCF istituto del CNR,
> Area della ricerca di Pisa
>
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