-m option

Collect MPI tracing data. The allowed values of option are:

• on– Turn on MPI tracing information.

• off– Turn off MPI tracing information.

MPI tracing is turned off by default unless the -M option is enabled, in which case MPI tracing is turned on by default. Normally MPI experiments are collected with the -M option, and no user control of MPI tracing is needed. If you want to collect an MPI experiment, but not collect MPI tracing data, use the explicit options -M MPI-version -m off.

See MPI Tracing Data for more information about the MPI functions whose calls are traced and the metrics that are computed from the tracing data.