benchmarker controller action

Hi I am trying to use script/performance/benchmarker to test a controller action.

I have tested different ways of specifying the action e.g for controller account, action test 'AccountController.test', 'account_controller.test' etc but nothing seems to work. I know how to made my own benchmark within the action, but would like to use the benchmarker

Is that possible ? How do you specify the action in using this script ?