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Subject: Re: [OMPI users] libibverbs
From: Brock Palen (brockp_at_[hidden])
Date: 2008-06-05 10:10:51


On Jun 5, 2008, at 9:21 AM, Jeff Squyres wrote:
> On Jun 4, 2008, at 4:28 PM, Brock Palen wrote:
>
>> We have two installs of openmpi-1.2.3
>> One with the pgi compilers the other with gcc/Nagf90
>>
>> One the pgi compilers does not link against libibverbs, but ompi_info
>> shows the openib btl and we see traffic on the fabric.
>>
>> The other built with Nagware links against libibverbs. It also shoes
>> in ompi_info the openib btl.
>>
>> What would cause this? It just pointed out that our login nodes
>> (most of our cluster does not have IB) don't have libibverbs making
>> code not link. Any insight from an OFED master would be great.
>
>
> Did you build the gcc/Nagf90 version with --enable-static or --
> disable-
> dlopen?
>
> See the thread starting here:
>
> http://www.open-mpi.org/community/lists/users/2008/06/5821.php

Yes,
Looks like Nag requires a library that was not compiled with -fPIC,
and the linker complains.
Looks more like a bug in our load, our login nodes were missing
libibverbs.a while the computes nodes do have it.

Brock Palen
www.umich.edu/~brockp
Center for Advanced Computing
brockp_at_[hidden]
(734)936-1985

>
> --
> Jeff Squyres
> Cisco Systems
>
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