Bao-Xia Fan received the B.S. and M.S. degrees in power engineer- ing from Dalian University of Tech- nology in 1998 and 2001, respec- tlvely. He is currently a Ph.D. can- didate in the Institute of Comput- ing Technology, Chinese Academy of Sciences, Beijing, China. His re- search interests include on-chip vari- ation analysis and optimization, de-sign methodology for high performance processor.E-mail: fanbaoxia@ict.ac.cn Liang Yang received the B.S. de- gree in computer science and technol- ogy from University of Science and Technology of China, Hefei, in 2004. He is currently pursuing the Ph.D. degree in the Institute of Comput- ing Technology, Chinese Academy of Sciences, Beijing. His current re- search interests include clock distri- bution network, interconnect model-ing and high performance and low power design. E-mail:yangliang@ict.ac.cn Jiang-Mei Wang received the B.S. Eng. degree in radio project from Harbin Institute of Technology, Harbin, in 1995. She is currently working as a P&R engineer of Loong- son CPU series chip in the Institute of Computing Technology, Chinese Academy of Sciences, Beijing. Her research interests include deep sub- micron physical design.E-mail:wangjiangmei@ict.ac.cn Ru Wang received her B.S. de- gree from the University of Sci- ence and Technology of China in 2005, majored in electronic science and technology. She is currently a Ph.D. candidate of the Institute of Coraputing Technology, the Chinese Academy of Sciences, Beijing, China. Her research interests include chip power analysis and low power techniques for high performance processors.E-mail:wangru@ict.ac.cn Bin Xiao received the B.S. de- gree in electronic and electric from Peking University, Beijing, in 2006. He is currently working for Ph.D. degree in computing architecture at Institute of Computing Technology, Chinese Academy of Sciences, Bei- jing, China. His research interests include deep submicron physical de- sign,E-mail:xiaobin01@ict.ac.cn Ying Xu is currently a Master candidate in computing arc