SYNTAX

   C Syntax
          #include <mpi.h>

          int MPI_T_pvar_start(MPI_T_pvar_session session, MPI_T_pvar_handle handle)

          int MPI_T_pvar_stop(MPI_T_pvar_session session, MPI_T_pvar_handle handle)

INPUT PARAMETERS

       • session: Performance experiment session.

       • handle: Performance variable handle.

DESCRIPTION

       MPI_T_pvar_start  starts  the performance variable with the handle specified in handle. The special value
       MPI_T_PVAR_ALL_HANDLES can be passed in handle  to  start  all  non-continuous  handles  in  the  session
       specified in session.

       MPI_T_pvar_stop  stops  the  performance  variable with the handle specified in handle. The special value
       MPI_T_PVAR_ALL_HANDLES can be passed in  handle  to  stop  all  non-continuous  handles  in  the  session
       specified in session.

       Continuous performance variables can neither be started nor stopped.

ERRORS

       MPI_T_pvar_start and MPI_T_pvar_stop() will fail if:

       • MPI_T_ERR_NOT_INITIALIZED: The MPI Tools interface not initialized

       • MPI_T_ERR_INVALID_SESSION: Session parameter is not a valid session

       • MPI_T_ERR_INVALID_HANDLE: Invalid handle or handle not associated with the session

       • MPI_T_ERR_PVAR_NO_STARTSTOP: The variable cannot be started or stopped

       SEE ALSO:

          • MPI_T_pvar_get_info

COPYRIGHT

       2003-2025, The Open MPI Community

                                                  Feb 17, 2025                               MPI_T_PVAR_START(3)