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Table of Contents
MPI_T_pvar_readreset - Atomically read and reset the value of
a performance variable
#include <mpi.h>
int MPI_T_pvar_readreset(MPI_T_pvar_session session, MPI_T_pvar_handle
handle, const void *buf)
- session
- Performance experiment session.
- handle
- Performance
variable handle.
- buf
- Initial address of storage location for variable value.
MPI_T_pvar_readreset atomically queries and resets the value
of a performance variable bound to the handle specified by handle in the
session specified by session. The result is stored in the buffer pointed
to by buf. This function can only be used with performance variables that
are atomic and not readonly. The caller must ensure that the buffer pointed
to by buf is large enough to hold the entire value of the performance variable.
MPI_T_pvar_readreset() will fail if:
- [MPI_T_ERR_NOT_INITIALIZED]
- The MPI Tools interface not initialized
- [MPI_T_ERR_INVALID_HANDLE]
- The
handle is invalid or not associated with the session
- [MPI_T_ERR_INVALID_SESSION]
- Session argument is not a valid session
- [MPI_T_ERR_PVAR_NO_ATOMIC]
- Variable
cannot be read and written atomically
- [MPI_T_ERR_PVAR_NO_WRITE]
- Variable
cannot be reset
MPI_T_pvar_handle_alloc
MPI_T_pvar_get_info
MPI_T_pvar_session_create
MPI_T_pvar_read
MPI_T_pvar_reset
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