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Subject: Re: [OMPI devel] IBCM error
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2008-07-14 09:24:12

On Jul 14, 2008, at 9:21 AM, Pavel Shamis (Pasha) wrote:

>> Should we not even build support for it?
> I think IBCM CPC build should be enabled by default. The IBCM is
> supplied with OFED so it should not be any problem during install.

Ok. But remember that there are at least some OS's where /dev/ucm* do
*not* get created by default for some unknown reason (even though IBCM
is installed).

>> PRO: don't even allow the possibility of running with it, because
>> we know that there are issues with the ibcm userspace library
>> (i.e., reduce problem reports from users)
>> PRO: users don't have to have libibcm installed on compute nodes
>> (we've actually gotten some complaints about this)
> We got compliances only for case when ompi was build on platform
> with IBCM and after it was run on platform without IBCM. Also we
> did not have option to disable
> the ibcm during compilation. So actually it was no way to install
> OMPI on compute node. We added the option and the problem was
> resolved.
> In most cases the OFED install is the same on all nodes and it
> should not be any problem to build IBCM support by default.

Ok, sounds good.

Jeff Squyres
Cisco Systems