Wei-Wu Hu received his B.S. degree from the University of Science and Technology of China in 1991 and his Ph.D. degree from the Institute of Computing Technology, Chinese Academy of Sciences in 1996, both in computer science. He is currently a professor in the Institute of Computing Technology. His research interests include high performance cornputer architecture, parallel processing and VLSI design. Jian Wang received his B.S. degree from the University of Science and Technology of China in 1994 and his M.S. degree from the Institute of Computing Technology, Chinese Academy of Sciences in 1997, both in computer science. He is currently an associate professor in the Institute of Computing Technology. His research interests include high performance computer architecture and operating system.