题目: Increasing System Reliability Through Temperature-Aware Design
As CMOS technology continues its downward scaling trends, increase in chip power density makes the temperature-induced reliability problem a major design concern. System reliability is a strong function of temperature; a 10 degree difference in operating temperature can result in a 2X difference in the lifespan of a chip. Though chip packaging and cooling solutions can be employed to handle worst-case temperature profiles, such solutions can be prohibitively expensive, since the cost of cooling solutions increases super-linearly in power consumption. Improving system reliability through resource management (including execution throttling, and task assignment and scheduling) can provide some powerful alternatives.
This talk discusses two techniques in temperature-aware and reliability-aware design of general-purpose systems. The first technique directly aims at reducing peak temperature. Specifically, an optimal throttling policy is presented for maximizing the work completed under a given peak temperature constraint. The policy is applicable to processors with discrete speed levels and non-negligible transition overheads. Though the throttling policy is effective in controlling peak temperature, it does not directly address the reliability concern. Toward this goal, a number of observations will be given which help describe desirable temperature profiles for increasing system lifetime. An online task assignment and scheduling strategy is then introduced,for directly maximizing system lifetime.
Xiaobo Sharon Hu is a professor in the department of Computer Science and Engineering at the University of Notre Dame, Notre Dame, Indiana, USA. She also holds a joint appointment in the department of Electrical Engineering at the same university. She received B.S. degree from Tianjin University, China, M.S. degree from Polytechnic University of New York, and Ph.D. degree from Purdue University. She worked for General Motors Research Labs for almost 4 years before she started her academic career. Between 1993 and 1996, she was an assitant professor in the department of Electrical and Computer Engineering at Western Michigan University, Kalamazoo, Michigan, USA.
Her research interests include analysis and design of low power, real-time, and embedded systems, computing with emerging technologies, and computational medicine. She has published more than 200 referred papers in these areas and received numerous research grants from both the U.S. government agencies and private industry. She received the CAREER award from U.S. National Science Foundation in 1997. She received the Best Paper Award from the ACM/IEEE Design Automation Conference in 2001 and from the IEEE Symposium on Nanoscale Architectures in 2009. Another paper of hers was named one of "The Most Influential Papers of 10 Years Design, Automation, and Test in Europe Conference (DATE)".
Sharon is currently Associate Editor for ACM Transactions on Embedded Computing and Co-Chair of the Technical Program Committee of 2014 Design Automation Conference (DAC). She also served as Associate Editor for IEEE Transactions on VLSI and ACM Transactions on Design Automation of Electronic Systems. She has served as guest editors for several different journals/magazines such as the IEEE Computer Magazine and IEEE Transactions on Industrial Informatics. She was the Technical Program Co-Chair of the 9th International Symposium on Hardware/Software Codesign (CODES'2001) and the General Co-Chair of the same conference in 2002. She also served or is serving on the program committee of a number of conferences such as Design Automation Conference (DAC), International Conference on Computer-Aided Design (ICCAD), Design, Automation and Test in Europe Conference )DATE), IEEE Real-Time Systems Symposium (RTSS), and IEEE Real-Time and Embedded Technology and Applications Symposium (RTAS), etc.
At the University of Notre Dame, Sharon had been the Director of Graduate Studies for 10 years in the department of Computer Science and Engineering, and was Senior Assistant Provost for ND International between 2012--2013. Currently, she is the Associate Dean for Professional Development at the Graduate School.