Nickolai Zeldovich Ramesh Chandra Interactive Performance Measurement with VNCPlay. 189-198 2005 conf/usenix/2005f USENIX Annual Technical Conference, FREENIX Track http://www.usenix.org/events/usenix05/tech/freenix/zeldovich.html db/conf/usenix/usenix2005f.html#ZeldovichC05