The functions manage logging of
is used to turn on and turn off logging.
is a valid file handle returned by a prior call to
then performance events will be logged to the file corresponding
to the specified handle.
If the value of argument
is -1 then logging will be stopped after any pending data is flushed.
will force all log data queued inside the
driver to be written out.
will append a log entry containing the value of argument
to the log file.
will flush all pending log data and close
hwpmc 4 Ap s
side of the stream.