Jason Nieh Christopher Vaill Hua Zhong Virtual-Time Round-Robin: An O(1) Proportional Share Scheduler. 245-259 2001 conf/usenix/2001g USENIX Annual Technical Conference, General Track http://www.usenix.org/publications/library/proceedings/usenix01/nieh.html db/conf/usenix/usenix2001g.html#NiehVZ01