Hi, I have a way to toggle single-node testing at the command line. E.g., it looks like this:
$ client/mtt run_on_single_node=1 ... $ client/mtt run_on_single_node=0 ... I just needed the below INI mojo to get this going. Added a "run_on_single_node" boolean to my [MTT] section. ("ompinfo" is an internal Sun script that spits out hard-coded hostlist's based on what node the user is on.) {{{ [MTT] ... # Boolean which tells MTT to run on a single node run_on_single_node = 0 ompinfo = /ws/ompi-tools/bin/ompinfo hostlist = <<EOT &perl(" if ($run_on_single_node) { return `$ompinfo -j' ' | cut -f1 -d' '`; } else { return `$ompinfo -j' '`; } ") EOT }}} And then I have this in my [MPI Details] section: {{{ [MPI Details: Open MPI] ... # Figure out which btl's to use btls = <<EOT &perl(" # Return cached btls var, if we have it if (defined(\@btls)) { return \\\@btls; } # What hosts is MTT currently running on? my \@hosts = split /\s+|,/, hostlist_hosts(); # If there is only one host, use SM if (scalar(\@hosts) < 2) { push(\@btls, 'self,sm'); # Otherwise, use uDAPL or TCP } else { if ($ib_is_up) { push(\@btls, 'self,udapl'); } else { push(\@btls, 'self,tcp'); } } return \\\@btls; ") EOT }}} Is there an easier way to do this? -Ethan