Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Open MPI User's mailing list

Subject: Re: [OMPI users] quadrics support?
From: Michael Di Domenico (mdidomenico4_at_[hidden])
Date: 2009-07-02 09:34:04


Jeff,

Okay, thanks. I'll give it a shot and report back. I can't
contribute any code, but I can certainly do testing...

On Thu, Jul 2, 2009 at 9:23 AM, Jeff Squyres<jsquyres_at_[hidden]> wrote:
> I see ompi/mca/btl/elan in the OMPI SVN development trunk and in the 1.3
> tree (where elan = the quadrics interface).
>
> So actually, looking at the 1.3.x README, I see configure switches like
> "--with-elan" that specifies where the Elan (Quadrics) headers and libraries
> live. I have no Quadrics networks and didn't pay attention to this
> development at all (obviously ;-) ) -- you might want to give it a shot and
> see how well it performs. Meaning: I'm sure it works or UT wouldn't have
> pushed this stuff upstream, but I have no idea how well tuned it is.
>
> If you build OMPI properly, you should be able to tell if Quadrics support
> is included via
>
> ompi_info | grep elan
>
> You should see a BTL line for elan (i.e., a BTL plugin for "elan" is
> installed and functional). Although OMPI should automatically pick elan for
> MPI communications, you can force OMPI to pick it via:
>
> mpirun --mca btl elan,self ...
>
> Quadrics networks should also qualify for Open MPI's "other" type of network
> support (the MTL, instead of the BTL). MTL level support can typically give
> slightly better performance on some types of networks, but it doesn't look
> like anyone did any work in this area. Contributions are always welcome, of
> course! :-)
>
>
>
> On Jul 2, 2009, at 9:12 AM, Michael Di Domenico wrote:
>
>> Jeff,
>>
>> Thanks, honestly though if the patches haven't been pulled mainline,
>> we are not likely to bring it internally. I was hoping that quadrics
>> support was mainline, but the documentation was out of date.
>>
>> On Thu, Jul 2, 2009 at 8:08 AM, Jeff Squyres<jsquyres_at_[hidden]> wrote:
>> > George --
>> >
>> > I know that U. Tennessee did some work in this area; did it ever
>> > materialize?
>> >
>> >
>> > On Jul 1, 2009, at 4:49 PM, Michael Di Domenico wrote:
>> >
>> >> Did the quadrics support for OpenMPI ever materialize? I can't find
>> >> any documentation on the web about it and the few mailing list
>> >> messages I came across showed some hints that it might be in progress
>> >> but that was way back in 2007
>> >>
>> >> Thanks
>> >> _______________________________________________
>> >> users mailing list
>> >> users_at_[hidden]
>> >> http://www.open-mpi.org/mailman/listinfo.cgi/users
>> >>
>> >
>> >
>> > --
>> > Jeff Squyres
>> > Cisco Systems
>> >
>> > _______________________________________________
>> > users mailing list
>> > users_at_[hidden]
>> > http://www.open-mpi.org/mailman/listinfo.cgi/users
>> >
>> _______________________________________________
>> users mailing list
>> users_at_[hidden]
>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>
>
>
> --
> Jeff Squyres
> Cisco Systems
>
> _______________________________________________
> users mailing list
> users_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/users
>