:ref:`MPI_T_pvar_session_create`, :ref:`MPI_T_pvar_session_free` - Create/free performance variable session
#include <mpi.h>
int MPI_T_pvar_session_create(MPI_T_pvar_session *session)
int MPI_T_pvar_session_free(MPI_T_pvar_session *session)
:ref:`MPI_T_pvar_session_create` creates a session for accessing performance variables. The new session is returned in the session parameter.
:ref:`MPI_T_pvar_session_free` releases a session allocated by :ref:`MPI_T_pvar_session_create` and sets the session parameter to MPI_T_PVAR_SESSION_NULL.
:ref:`MPI_T_pvar_session_create` will fail if:
MPI_T_ERR_NOT_INITIALIZED
: The MPI Tools interface not initializedMPI_T_ERR_MEMORY
: Out of memoryMPI_T_ERR_OUT_OF_SESSIONS
: No more sessions available
:ref:`MPI_T_pvar_session_free` will fail if:
MPI_T_ERR_NOT_INITIALIZED
: The MPI Tools interface not initializedMPI_T_ERR_INVALID_SESSION
: The session parameter is not a valid session