Re: [gentoo-cluster] multithreaded MPI with infiniband (mvapich2?)

[Brian Budge]

Hi Bryan -

Something strange is happening.  with --pretend, it seems that the blockage
is gone, however, without it, I still get blockage:

burn openib-userspace # USE=rdma emerge -uDpv openib-mvapich2

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild  N    ] sys-cluster/openib-mvapich2-1.0.1  USE="rdma threads -debug
-large-cluster -medium-cluster" 0 kB [1]

Total: 1 package (1 new), Size of downloads: 0 kB
Portage tree and overlays:
 [0] /usr/portage
 [1] /usr/portage/local/layman/science
burn openib-userspace # USE=rdma emerge openib-mvapich2
Calculating dependencies... done!
[ebuild  N    ] sys-cluster/openib-mvapich2-1.0.1  USE="rdma threads -debug
-large-cluster -medium-cluster"
[blocks B     ] sys-cluster/openib-mvapich2 (is blocking sys-cluster/openib-
userspace-1.2.5.1-r1)

 * Error: The above package list contains packages which cannot be
 * installed at the same time on the same system.

For more information about Blocked Packages, please refer to the following
section of the Gentoo Linux x86 Handbook (architecture is irrelevant):

http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?full=1#blocked

Sorry to be such a pain!
  Brian

On Jan 3, 2008 10:19 AM, Bryan Green <bryan.d.green@××××.gov> wrote:

> "Brian Budge" writes:
> >
> > Hi all (again) -
> >
> > I just came to the realization that OpenMPI does not support a
> multithreaded
> > model with infiniband.  I am looking into the openib-mvapich2, as
> mvapich
> > appears to support both infiniband and multithreading simultaneously.
> > Unfortunately, I'm getting a blockage saying that it can't be used with
> the
> > openib-userspace package.
> >
> > Does anyone know of an easy way to resolve this?
>
> My bad.
> Fixed it.  Update your overlay.  You might have to re-emerge
> openib-userspace.  If so, sorry for the inconvenience.
>
> -Bryan
>
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