Re: [OMPI users] An equivalent to btl_openib_include_if when MXM over Infiniband ?

[Dave Love]

"Audet, Martin"  writes:

> Hi Josh,
>
> Thanks for your reply. I did try setting MXM_RDMA_PORTS=mlx4_0:1 for all my 
> MPI processes
> and it did improve performance but the performance I obtain isn't completely 
> satisfying.

I raised the issue of MXM hurting p2p latency here a while ago, but
don't have a solution.  Mellanox were here last week and promised to
address that, but I haven't heard back.  I get the impression this stuff
isn't widely used, and since it's proprietary, unlike PSM, we can't
really investigate.
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Re: [OMPI users] SGE integration broken in 2.0.0

[Dave Love]

"Jeff Squyres (jsquyres)"  writes:

> On Aug 16, 2016, at 3:07 PM, Reuti  wrote:
>> 
>> Thx a bunch - that was it. Despite searching for a solution I found
>> only hints that didn't solve the issue.
>
> FWIW, we talk about this in the HACKING file, but I admit that's not
> necessarily the easiest place to find:
>
> https://github.com/open-mpi/ompi/blob/master/HACKING#L126-L129

autogen.pl tries to check versions of the tools, as one might hope, so
the question is why it fails.  The check works for me on RHEL6 if I
reverse the order of the autoconf and libtool checks.

A related question I should have asked long ago:  I don't suppose it
would have helped to catch this, but why is it necessary to configure
gridengine support specifically?  It doesn't need library support and
seems harmless at run time if you're not using gridengine, as it just
needs environment variables which are unlikely to be wrongly set --
other things rely on them to distinguish resource managers.  Similarly
for any other resource manager that works like that.
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