David Tam Ph.D. Candidate University of Toronto The Edward S. Rogers Sr. Department of Electrical & Computer Engineering Computer Engineering Research Group

My Ph.D. thesis topic is on exploiting SMP-CMP-SMT multiprocessors from an operating system's perspective. Here is a research description that I wrote in October 2003. My thesis supervisor is Michael Stumm.

My general research interests are in the design, implementation, performance, and optimization of:

• operating systems
• computer architecture
• parallel & distributed systems & applications
• compilers & run-time systems
• databases

My résumé.

I received my Bachelor and Master of Applied Science in Computer Engineering degrees from the University of Toronto in June 1999 and June 2003, respectively. From September 1999 to April 2006, I was a member of the K42 Operating System Research Group at the University of Toronto, which had close ties to the K42 Group at the IBM Thomas J. Watson Research Center. In 2001, from January to April, I did a four month internship at the IBM Thomas J. Watson Research Center, Yorktown Heights, New York, where I worked with the K42 Operating System Research Group. From May 2004 to April 2009, I was a visiting student at the IBM Centers for Advanced Studies, located in the IBM Toronto Software Laboratory.

"Enhancing Operating System Support for Multicore Processors by Using Hardware Performance Monitoring", R. Azimi, D. Tam, L. Soares, M. Stumm, ACM Special Interest Group on Operating Systems (SIGOPS), Operating Systems Review (OSR), Special Issue on the Interaction Among the OS, Compilers, and Multicore Processors, Vol. 43, No. 2, Apr 2009, pp. 55-65.

"RapidMRC: Approximating L2 Miss Rate Curves on Commodity Systems for Online Optimizations", D. Tam, R. Azimi, L. Soares, M. Stumm, Int'l Conf. on Architectural Support for Programming Languages and Operating Systems (ASPLOS), Mar 2009, pp. 121-132.

"Reducing the Harmful Effects of Last-Level Cache Polluters with an OS-Level, Software-Only Pollute Buffer", L. Soares, D. Tam, M. Stumm, Int'l Symp. on Microarchitecture (MICRO), Nov 2008, pp. 258-269.

"Managing Shared L2 Caches on Multicore Systems in Software", D. Tam, R. Azimi, L. Soares, M. Stumm, Workshop on the Interaction between Operating Systems and Computer Architecture (WIOSCA), Jun 2007. Held in conjunction with the Int'l Symp. on Computer Architecture (ISCA), 2007, pp. 27-33.

"Thread Clustering: Sharing-Aware Scheduling on SMP-CMP-SMT Multiprocessors", D. Tam, R. Azimi, M. Stumm, European Conf. in Computer Systems (EuroSys), Mar 2007, pp. 57-58.

"K42: An Infrastructure for Operating System Research", D. Da Silva, O. Krieger, R.W. Wisniewski, A. Waterland, D. Tam, A. Baumann, ACM SIGOPS Operating Systems Review, Vol. 40, No. 2, Apr 2006, pp. 34-42.

"Building Content-Based Publish/Subscribe Systems with Distributed Hash Tables", D. Tam, R. Azimi, H.-A. Jacobsen, Workshop on Databases, Information Systems and Peer-to-Peer Computing, Sep 2003; Held in conjunction with the Int'l Conf. on Very Large Data Bases (VLDB), 2003; Published in Lecture Notes in Computer Science, LNCS 2944, Springer-Verlag, 2004, pp. 138-152.

"Enabling Scalable Performance for General Purpose Workloads on Shared Memory Multiprocessors", J. Appavoo, M. Auslander, D. Da Silva, O. Krieger, M. Ostrowski, B. Rosenburg, R.W. Wisniewski, J. Xenidis, M. Stumm, B. Gamsa, R. Azimi, R. Fingas, A. Tam, D. Tam, IBM Research Report RC22863, Jul 2003.

"Performance Analysis and Optimization of the Hurricane File System on the K42 Operating System", D. Tam, Master's thesis, Dept. of Electrical & Computer Engineering, University of Toronto, Jan 2003.

"RapidMRC: Approximating L2 Miss Rate Curves on Commodity Systems for Online Optimizations", D. Tam, R. Azimi, L. Soares, M. Stumm, Int'l Conf. on Architectural Support for Programming Languages and Operating Systems (ASPLOS), Mar 2009.

"Managing Shared L2 Caches on Multicore Systems in Software", D. Tam, R. Azimi, L. Soares, M. Stumm, Workshop on the Interaction between Operating Systems and Computer Architecture (WIOSCA), Jun 2007. Held in conjunction with the Int'l Symp. on Computer Architecture (ISCA), 2007.

"Thread Clustering: Sharing-Aware Scheduling on SMP-CMP-SMT Multiprocessors", D. Tam, R. Azimi, M. Stumm, European Conf. in Computer Systems (EuroSys), Mar 2007.

"Enhancing Operating System Algorithms through Hardware Performance Monitoring", R. Azimi, D. Tam, L. Soares, M. Stumm, Workshop on Functionality of Hardware Performance Monitors, Dec 2006; Held in conjunction with the Int'l Symp. on Microarchitecture (MICRO), 2006.

"Using Hardware Counters To Improve Dynamic Compilation", D. Tam, J. Wu, M. Voss, University of Toronto - IBM Compiler Seminar, Feb 2004.

"Building Content-Based Publish/Subscribe Systems with Distributed Hash Tables", D. Tam, R. Azimi, H.-A. Jacobsen, Workshop on Databases, Information Systems and Peer-to-Peer Computing, Sep 2003; Held in conjunction with the Int'l Conf. on Very Large Data Bases (VLDB), 2003.

"Implementing Resource Containers in K42", A. Tam, D. Tam, R. Azimi, Apr 2003.

"Using Hardware Counters to Improve Dynamic Compilation", D. Tam, J. Wu, Dec 2003.

"Improving Data Locality During Thread-Level Speculation", A. Tam, D. Tam, Apr 2003.

"Dynamic Voltage Scaling in Mobile Devices", D. Tam, W. Tsang, C. Drula, Dec 2003.

"Encoding Mathematics", D. Tam, Apr 2000.

"Fortran D", D. Tam, May 2000.

"Multilayer Routing on Multichip Modules", D. Tam, Dec 1999.

• Systems Software Reading Group (Manager 2002-2007)
• Compiler & Architecture Reading Group

• Ph.D.
• Master's

• Personal web page (fairly old)
• My web browser bookmarks
• EECG web-based email
• SSH to EECG

ECE Graduate Office
10 King's College Road
Toronto, Ontario  M5S 3G4
CANADA