Also remove the btl openib.la file in the same dir.
Sent from my phone. No type good.
> On Mar 19, 2015, at 9:05 AM, Tus wrote:
>
> I removed openib.so. I get this error with --mca btl_tcp_if_include p2p1:
>
> [compute-0-7.local:04799] mca: base: component_find: unable to open
> /share/apps/openmpi-1.8.4/lib/openmpi/mca_btl_openib:
> /share/apps/openmpi-1.8.4/lib/openmpi/mca_btl_openib.so: cannot open
> shared object file: No such file or directory (ignored)
>
> with -mca btl ^openib ---> there is no error.
>
> Jeff,
> Thanks for your input. I was able to get 50% performance improvemnt
> forcing it to use our 10G net.
>
>>> On Mar 9, 2015, at 12:19 PM, Tus wrote:
>>>
>>> I configured and installed 1.8.4 on my system. I was getting openfabric
>>> erros and started to specify-mca btl ^openib which is working but very
>>> slow.
>>>
>>> I would like to complile again excluding openfabric or ib support. I do
>>> have a 10GbE fast network in addition to 1G net. What flags are need to
>>> ignore ib support and how can I verify/force openmpi to use my 10GbE
>>> net?
>>
>> You have several options:
>>
>> 1. If you did a default Open MPI install, you can simply rm the
>> "mca_btl_openib.so" plugin that was installed under $prefix/lib/openmpi.
>> Open MPI then won't know that that plugin exists, and it won't try to use
>> OpenFabrics-based devices.
>>
>> 2. You can set a system-wide MCA parameter to ignore the openib BTL. That
>> way, you don't have to type it on the mpirun command line every time.
>>
>> 3. You can rebuild Open MPI with the --without-verbs configure command
>> line switch. This will ultimately have the same effect as #1 (i.e., the
>> openib plugin won't be in the installation tree).
>>
>> As for using your 10G, I assume you mean over TCP sockets, right?
>>
>> If so, you can use --mca btl_tcp_if_include or
>> . E.g.:
>>
>> mpirun --mca btl_tcp_if_include eth1 ...
>> mpirun --mca btl_tcp_if_include 10.20.30.0/24 ...
>>
>> --
>> Jeff Squyres
>> jsquy...@cisco.com
>> For corporate legal information go to:
>> http://www.cisco.com/web/about/doing_business/legal/cri/
>
>
