[openib-general] openMPI for 2.6.17.10 kernel

[Matt Leininger]

On Thu, 2006-11-30 at 12:30 -0600, Steve Wise wrote:
> On Thu, 2006-11-30 at 12:12 -0500, Jeff Squyres wrote:
> > It just clicked in my brain as to why you were asking this question.
> > 
> > Remember that OMPI currently does not use any CM for OF connections  
> > at all.  So it's not like it's using the old CM that doesn't support  
> > iWARP.  OMPI uses its own out-of-band mechanism, which, as I  
> > understand it, should work with iWARP just as well as it works for IB.
> > 
> > Am I incorrect in thinking that?  (I have no iWARP hardware to test  
> > with)
> 
> iWARP _requires_ the RDMA-CM for connection setup...
> 
> So OMPI as it stands today won't work over iwarp devices.
> 
> Right now, the only non-uDAPL MPI solution that will work with the iwarp
> stable svn branch + 2.6.17 RNFS is MVAPICH2.
> 
> If you utilize uDAPL, then Intel and HP have MPI libs that might work...

  OMPI also has a uDAPL network device (along with a device that uses
verbs directly).  So if we just use OMPI uDAPL it should work over
iWarp?

  - Matt

> 
> 
> Steve.