Empire State Building (New York, NY)

Current Affiliation:  Blue Waters Directorate  National Center for Supercomputing Applications  University of Illinois at Urbana-Champaign  1205 W. Clark St.  Urbana, IL 61801, USA  Tel: +01 217 244 7736

I am a working in the Blue Waters Directorate at the University of Illinois at Urbana-Champaign. I am responsible for performance modeling and simulation of the Blue Waters Petascale computer and applications running on it. In this effort, I am working with William Kramer, Marc Snir, and Bill Gropp and external partners.

I am co-chair of the collective operations working group in the MPI Forum. I am interested in Collective Communications, Process Topologies, One Sided Operations, and Hybrid Programming in MPI. I am also ACM and IEEE member.

My research interests include (1) performance modeling, simulation, and optimization of large-scale parallel applications, (2) topologies, routing, and host interfaces of large-scale networks, and (3) advanced parallel programming techniques and runtime environments.

• MPI Forum WG Chair: Collective Operations and Process Topologies Working Group
• Chair: 16th Intl. Workshop on High-Level Parallel Programming Models and Supportive Environments (HIPS'11)
• Tutorial Chair: Hot Interconnects 2010 (Hoti'10)
• Program Committees: ICS'11, CCGrid'11, SC'10, IPDPS'10, EuroMPI'10, HotI'10, Cluster'10, HiPC'10

• Doctorate (Ph.D.), Computer Science, Indiana University Bloomington, 2008
• Diplom (M.Sc.), Computer Science, University of Technology Chemnitz, 2005

[1] T. Hoefler, T. Schneider and A. Lumsdaine:
	Characterizing the Influence of System Noise on Large-Scale Applications by Simulation Nov. 2010, Accepted at International Conference for High Performance Computing, Networking, Storage and Analysis (SC'10) SC10 Best Paper Finalist

[2] J. Willcock, T. Hoefler, N. Edmonds and A. Lumsdaine:
	AM++: A Generalized Active Message Framework Sep. 2010, Accepted at The Nineteenth International Conference on Parallel Architectures and Compilation Techniques (PACT'10)

[3] T. Hoefler, C. Siebert and A. Lumsdaine:
	Scalable Communication Protocols for Dynamic Sparse Data Exchange In Proceedings of the 2010 ACM SIGPLAN Symposium on Principles and Practice of Parallel Programming, presented in Bangalore, India, pages 159--168, ACM, ISBN: 978-1-60558-708-0, Jan. 2010,

[4] T. Hoefler and J. L. Traeff:
	Sparse Collective Operations for MPI In Proceedings of the 23rd IEEE International Parallel & Distributed Processing Symposium, HIPS'09 Workshop, presented in Rome, Italy, ISSN: 1530-2075, ISBN: 978-1-4244-3750-4, May 2009,

[5] T. Hoefler, P. Gottschling and A. Lumsdaine:
	Leveraging Non-blocking Collective Communication in High-performance Applications In Proceedings of the Twentieth Annual Symposium on Parallelism in Algorithms and Architectures, SPAA'08, presented in Munich, Germany, pages 113-115, Association for Computing Machinery (ACM), ISBN: 978-1-59593-973-9, Jun. 2008,

[6] T. Hoefler, A. Lumsdaine and W. Rehm:
	Implementation and Performance Analysis of Non-Blocking Collective Operations for MPI In Proceedings of the 2007 International Conference on High Performance Computing, Networking, Storage and Analysis, SC07, presented in Reno, USA, IEEE Computer Society/ACM, Nov. 2007,