def StartAgentTracing(self, config, timeout=None):
    """Start tracing for the controller tracing agent.

    Start tracing for the controller tracing agent. Note that
    the tracing controller records the "controller side"
    of the clock sync records, and nothing else.
    """
    del config
    if not trace_event.trace_can_enable():
      raise RuntimeError('Cannot enable trace_event;'
                         ' ensure py_utils is in PYTHONPATH')

    controller_log_file = tempfile.NamedTemporaryFile(delete=False)
    self._log_path = controller_log_file.name
    controller_log_file.close()
    trace_event.trace_enable(self._log_path)
    return True