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<TITLE>MPI_T_pvar_stop</TITLE>
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MPI_T_pvar_stop
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Stop a performance variable
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Synopsis
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int MPI_T_pvar_stop(MPI_T_pvar_session session, MPI_T_pvar_handle handle)
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Input Parameters
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session identifier of performance experiment session (handle)
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handle handle of a performance variable (handle)
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Notes
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This functions stops the performance variable with the handle identified by the parameter
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handle in the session identified by the parameter session.
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If the constant MPI_T_PVAR_ALL_HANDLES is passed in handle, the MPI implementation
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attempts to stop all variables within the session identified by the parameter session for
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which handles have been allocated. In this case, the routine returns MPI_SUCCESS if all
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variables are stopped successfully, otherwise MPI_T_ERR_PVAR_NO_STARTSTOP is returned.
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Continuous variables and variables that are already stopped are ignored when
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MPI_T_PVAR_ALL_HANDLES is specified.
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Thread and Interrupt Safety
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This routine is thread-safe. This means that this routine may be
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safely used by multiple threads without the need for any user-provided
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thread locks. However, the routine is not interrupt safe. Typically,
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this is due to the use of memory allocation routines such as <tt>malloc
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</tt>or other non-MPICH runtime routines that are themselves not interrupt-safe.
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Errors
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All MPI routines (except <tt>MPI_Wtime</tt> and <tt>MPI_Wtick</tt>) return an error value;
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C routines as the value of the function and Fortran routines in the last
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argument. Before the value is returned, the current MPI error handler is
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called. By default, this error handler aborts the MPI job. The error handler
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may be changed with <tt>MPI_Comm_set_errhandler</tt> (for communicators),
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<tt>MPI_File_set_errhandler</tt> (for files), and <tt>MPI_Win_set_errhandler</tt> (for
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RMA windows). The MPI-1 routine <tt>MPI_Errhandler_set</tt> may be used but
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its use is deprecated. The predefined error handler
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<tt>MPI_ERRORS_RETURN</tt> may be used to cause error values to be returned.
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Note that MPI does not guarentee that an MPI program can continue past
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an error; however, MPI implementations will attempt to continue whenever
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possible.
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MPI_SUCCESS No error; MPI routine completed successfully.
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MPI_T_ERR_NOT_INITIALIZED The MPI tool information interface is not initialized.
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MPI_T_ERR_INVALID_SESSION Session argument is not valid.
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MPI_T_ERR_INVALID_HANDLE The handle is invalid.
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MPI_T_ERR_PVAR_NO_STARTSTOP The performance variable can not be started or stopped.
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