[openib-general] openMPI for 2.6.17.10 kernel

[Tom Tucker]

Jeff:

Which version of OpenMPI uses the RDMA CMA? 

Tom

On Thu, 2006-11-30 at 06:49 -0500, Jeff Squyres wrote:
> I think that this is mainly an OFA question, not so much an Open MPI  
> question.
> 
> Provided you can get a coherent OFA stack (which others will have to  
> describe how to do), Open MPI should build against it with no  
> problem.  Be sure to use the --with-openib=<path to your OFA  
> installation> option to configure to enable OFA support.
> 
> Note that when using iWARP hardware, you will need to disable small  
> message RDMA at run-time by setting the MCA parameter  
> "btl_openib_use_eager_rdma" to 0.  There are a variety of ways to set  
> MCA parameters at run time; see http://www.open-mpi.org/faq/? 
> category=tuning#setting-mca-params for the details.
> 
> Future releases of Open MPI should do this automatically, but the  
> current stable series does not (more specifically: we're just getting  
> the iWARP vendors involved in Open MPI, so they're just becoming part  
> of the process, etc.).
> 
> 
> 
> On Nov 30, 2006, at 3:41 AM, Tziporet Koren wrote:
> 
> > Chen, Helen Y wrote:
> >>
> >> Hi,
> >>
> >> I am running a 2.6.17.10 kernel with Tom Tucker's rnfs patch and  
> >> would
> >> like to build Open MPI that uses either IB or iWARP RDMA through this
> >> kernel. Can I achieve this by getting the latest stable git and
> >> compile just the userspace software? If so, how do I go about getting
> >> the latest stable git, and how to compile just the userspace  
> >> stuff?  I
> >> am new at this and would really appreciate your help.
> >>
> >> Thanks,
> >> Helen
> >>
> >
> > OFED 1.1 contains OpenMPI for IB.
> > However best if Jeff from OpenMPI will answer it
> >
> > Tziporet
> >
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