Ralph,
When I use the "--pernode" option (instead of "--map-by ppr:1:node") with
v1.8@r31295, I get this:
----8<----
$ mpiexec --pernode 2 -n 4 --host dg1,dg2 ./ring_c
--------------------------------------------------------------------------
The following command line options and corresponding MCA parameter have
been deprecated and replaced as follows:
Command line options:
Deprecated: --pernode, -pernode
Replacement: --map-by ppr:1:node
Equivalent MCA parameter:
Deprecated: rmaps_base_pernode, rmaps_ppr_pernode
Replacement: rmaps_base_mapping_policy=ppr:1:node
The deprecated forms *will* disappear in a future version of Open MPI.
Please update to the new syntax.
--------------------------------------------------------------------------
--------------------------------------------------------------------------
mpiexec was unable to find the specified executable file, and therefore
did not launch the job. This error was first reported for process
rank 0; it may have occurred for other processes as well.
NOTE: A common cause for this error is misspelling a mpiexec command
line parameter option (remember that mpiexec interprets the first
unrecognized command line token as the executable).
Node: savbu-usnic-a
Executable: 2
--------------------------------------------------------------------------
----8<----
That's a strange error for two reasons:
* because mpiexec shouldn't be launching on the head node (I passed "--host
dg1,dg2")
* because the head node (savbu-usnic-a) actually does have a copy of this file
in the exact same place as dg1/dg2
Everything works as expected if I pass the non-deprecated form of the option to
mpiexec. I checked quickly at the tip of the v1.7 branch (v1.7@r31182) and it
has the same behavior. I have not tried any other revisions yet.
-Dave
