When a task appears in a clustered job for pegasus-mpi-cluster with this profile:

<profile namespace="pegasus" key="pmc_request_memory">100</profile>

the planner should generate a task in the pegasus-mpi-cluster DAG that looks like this:

TASK foo -m 100 /path/to/kickstart -args /path/to/exe -args

Where "-m" signifies memory and 100 is the amount of memory in MB. If the value of -m is not an integer it will be rounded up.