TWOPT_UINT("preserve_wait_ordering",preserve_wait_ordering,"only enable when getting unmatched send/recv errors in optimistic mode (turning on slows down simulation)"),
TWOPT_UINT("debug_cols",debug_cols,"completion time of collective operations (currently MPI_AllReduce)"),
TWOPT_UINT("enable_col_overhead",enable_col_overhead,"adding overhead to collective operations (currently MPI_AllReduce)"),
TWOPT_UINT("enable_mpi_debug",enable_debug,"enable debugging of MPI sim layer (works with sync=1 only)"),
TWOPT_UINT("sampling_interval",sampling_interval,"sampling interval for MPI operations"),
TWOPT_UINT("enable_sampling",enable_sampling,"enable sampling (only works in sequential mode)"),