I am on a MacBook Pro with this processor: http://ark.intel.com/Product.aspx?id=52227, computing a strictly single-threaded workload. Since the CPU has a clock speed of 2.3 GHz and a max Turbo Frequency of 3.4 GHz, I'd like to check whether the 3.4GHz is ever reached in practice. Can you please recommend a Mac OS X tool (possibly with a GUI) that shows that?