MPI_T_cvar_get_num(3) Open MPI MPI_T_cvar_get_num(3)

MPI_T_cvar_get_num - Query the number of control variables

#include <mpi.h>
int MPI_T_cvar_get_num(int *num_cvar)

Current number of control variables.

MPI_T_cvar_get_num can be used to query the current number of control variables. The number of control variables may increase throughout the execution of the process but will never decrease.

MPI_T_cvar_get_num() will fail if:

[MPI_T_ERR_NOT_INITIALIZED]
The MPI Tools interface not initialized
May 26, 2022 4.1.4