Watertower (Bautzen, Germany) [2011]

Positions:  Assistant Professor  Scalable Parallel Computing Lab  Computer Science Department  ETH Zürich  Universitaetsstrasse 6  CAB E 64.1  8092 Zürich, Switzerland  Office phone: +41 44 632 63 44  Adjunct Assistant Professor  Computer Science Department  University of Illinois at Urbana-Champaign

I recently started a new position as Assistant Professor for Computer Science at ETH Zürich. I am leading the Scalable Parallel Computing Laboratory (SPCL) at ETH.

Before I left the USA, I was working in the Blue Waters Directorate at the University of Illinois at Urbana-Champaign. I was responsible for performance modeling and simulation of the Blue Waters Petascale computer and applications running on it. In this effort, I worked 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 a member of ACM SIGHPC, ACM, and IEEE.

My research interests revolve around the central topic of "Performance-centric Software Development". In the context of High-Performance Computing (HPC), one can identify three sub-branches that I am actively working on: (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. An overview graph of my past and current research activities (relative to my publication list) shows their connections: Research Overview.

My Erdős number is three (via Marc Snir and Shlomo Moran) and I am an academic descendant of Hermann von Helmholtz.

• MPI Forum WG Chair: Collective Operations and Process Topologies Working Group
• Emerging Technologies Chair: Supercomputing 2013 (SC'13)
• Co-Chair: Intl. Workshop on Runtime and Operating Systems for Supercomputers
• General Co-Chair: Hot Interconnects 2014 (HOTI'14)
• Chair: 16th Intl. Workshop on High-Level Parallel Programming Models and Supportive Environments
• Program Committees: SC'12, SPAA'13, Big Data'13, ICPP'13, PPoPP'14, ...

SC12	[1] T. Hoefler, T. Schneider:
		Optimization Principles for Collective Neighborhood Communications In Proceedings of the International Conference on High Performance Computing, Networking, Storage and Analysis, presented in Salt Lake City, Utah, USA, pages 98:1--98:10, IEEE Computer Society Press, ISBN: 978-1-4673-0804-5, Nov. 2012, (acceptance rate: 21%, 100/472)

PACT'12	[2] T. Hoefler, T. Schneider:
		Runtime Detection and Optimization of Collective Communication Patterns In Proceedings of the 21st international conference on Parallel Architectures and Compilation Techniques (PACT), presented in Minneapolis, MN, USA, pages 263--272, ACM, ISBN: 978-1-4503-1182-3, Sep. 2012, (acceptance rate: 18.9%, 39/207)

SC11	[3] T. Hoefler, W. Gropp, M. Snir and W. Kramer:
		Performance Modeling for Systematic Performance Tuning In International Conference for High Performance Computing, Networking, Storage and Analysis (SC'11), SotP Session, Nov. 2011,

ICS'11	[4] T. Hoefler and M. Snir:
		Generic Topology Mapping Strategies for Large-scale Parallel Architectures In Proceedings of the 2011 ACM International Conference on Supercomputing (ICS'11), presented in Tucson, AZ, pages 75--85, ACM, ISBN: 978-1-4503-0102-2, Jun. 2011, (acceptance rate 21.7%, 35/161)

SC10	[5] T. Hoefler, T. Schneider and A. Lumsdaine:
		Characterizing the Influence of System Noise on Large-Scale Applications by Simulation In International Conference for High Performance Computing, Networking, Storage and Analysis (SC'10), Nov. 2010, (acceptance rate 19.8%, 50/253) SC10 Best Paper Award

PPoPP'10	[6] 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 (PPoPP'10), presented in Bangalore, India, pages 159--168, ACM, ISBN: 978-1-60558-708-0, Jan. 2010, (acceptance rate 16.8%, 29/173)

SC07	[7] 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, (acceptance rate 20%, 54/268)