17.2.370. MPI_T_pvar_start

MPI_T_pvar_start, MPI_T_pvar_stop - Start/stop a performance variable

17.2.370.1. SYNTAX

17.2.370.1.1. 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)

17.2.370.2. INPUT PARAMETERS

session: Performance experiment session.
handle: Performance variable handle.

17.2.370.3. 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.

17.2.370.4. 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