Open MPI currently has a "negative ACK" kind of assumption built into
it -- it assumes that if you have high-speed network support built
into it, you'll want to know if you're not using it.
You're correct that you can disable this warning by setting the "btl"
MCA parameter to ^openib (or any other inclusive value that does not
have "openib" in it).
On Sep 19, 2007, at 1:19 PM, Tobias Burnus wrote:
If I start an MPI job with:
mpirun -np 2
the following gets shown:
----------------------------------------------------------------------
----
[0,1,0]: OpenIB on host tux was unable to find any HCAs.
Another transport will be used instead, although this may result in
lower performance.
----------------------------------------------------------------------
----
----------------------------------------------------------------------
----
[0,1,0]: uDAPL on host tux was unable to find any NICs.
Another transport will be used instead, although this may result in
lower performance.
----------------------------------------------------------------------
----
libibverbs: Fatal: couldn't read uverbs ABI version.
before it runs the job. The point is: As I have *one* SMP machine,
there
is no need to use Infiniband etc. as accessing the local memory
directly
will be faster ;-)
Why is this message shown in this case?
(I read that one can suppress the first message via "btl=^openib" in
/etc/openmpi-mca-params.conf:.)
Tobias
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Jeff Squyres
Cisco Systems
