By default use mpirun for runs when doing diagnostics tests. mom-ocea…

…n#328

tools/tests/run_config.py

@@ -3,18 +3,18 @@
 import os
 
 def get_exec_prefix(model, exp_name, variation):
-  """
-  Return a prefix needed to execute the given experiment.
+    """
+    Return a prefix needed to execute the given experiment.
 
-  model is the model configuration, e.g. ice_ocean_SIS2 or ocean_only
-  exp_name is the experiment name, e.g. Baltic or global_ALE
-  variation is the a variation on the experiment, e.g. z, layer. 
-  """
+    model is the model configuration, e.g. ice_ocean_SIS2 or ocean_only
+    exp_name is the experiment name, e.g. Baltic or global_ALE
+    variation is the a variation on the experiment, e.g. z, layer. 
+    """
 
-  exec_prefix = ''
+    exec_prefix = 'mpirun -n 2'
 
-  pbs_o_host = os.getenv('PBS_O_HOST')
-  if pbs_o_host is not None and 'gaea' in pbs_o_host:
-      exec_prefix = 'aprun -n 1'
+    pbs_o_host = os.getenv('PBS_O_HOST')
+    if pbs_o_host is not None and 'gaea' in pbs_o_host:
+        exec_prefix = 'aprun -n 1'
 
-  return exec_prefix
+    return exec_prefix