-M option

Specify collection of an MPI experiment. The target of the collect command should be the mpirun command, and its options should be separated from the target programs to be run by the mpirun command by a ‐‐ option. (Always use the ‐‐ option with the mpirun command so that you can collect an experiment by prepending the collect command and its option to the mpirun command line.) The experiment is named as usual and is referred to as the founder experiment; its directory contains subexperiments for each of the MPI processes, named by rank.

The allowed values of option are:

• MPI-version-Turn on collection of an MPI experiment, assuming the specified MPI version.

• off-Turn off collection of an MPI experiment.

By default, turn off collection of an MPI experiment. When an MPI experiment is turned on, the default setting for the -m option is changed to on.

The supported versions of MPI are printed when you type the collect command with no options, or if you specify an unrecognized version with the -M option.