MPI_T_pvar_start(3) Open MPI MPI_T_pvar_start(3)

MPI_T_pvar_start, MPI_T_pvar_stop - Start/stop a performance variable

#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)

Performance experiment session.
Performance variable handle.

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.

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

MPI_T_pvar_get_info
November 24, 2021 4.1.2