Torsten Hoefler | |
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Alma mater | Indiana University TU Chemnitz |
Awards | |
Scientific career | |
Fields | High-Performance Computing Computer Science |
Institutions | ETH Zurich Swiss National Supercomputing Centre Microsoft Cray University of Illinois at Urbana-Champaign Indiana University |
Doctoral advisor | Andrew Lumsdaine |
Torsten Hoefler is a Professor of Computer Science at ETH Zurich [8] and the Chief Architect for Machine Learning at the Swiss National Supercomputing Centre. [9] Previously, he led the Advanced Application and User Support team at the Blue Waters Directorate of the National Center for Supercomputing Applications, [10] and held an adjunct professor position at the Computer Science Department at the University of Illinois at Urbana Champaign. [11] His expertise lies in large-scale parallel computing and high-performance computing systems. He focuses on applications in large-scale artificial intelligence as well as climate sciences.
Hoefler is an IEEE Fellow, [12] ACM Fellow, [13] and a member of the European Academy of Sciences Academia Europaea. [14] His Erdos number is two. [15]
He has been invited to present several keynote lectures at major international conferences such as ACM's Federated Computing Research Conference, [16] IEEE Cluster, [17] HPC Asia, Supercomputing Asia, [18] or the International Symposium on Distributed Computing. [19]
Hoefler received his Diplom in Computer Science from TU Chemnitz where he received the best student award in 2005. [20] He worked on high-performance computing systems from the very beginning of his career. He continued his studies at Indiana University, the home of Open MPI, under the guidance of Prof. Andrew Lumsdaine. He received his PhD in Computer Science in 2008 from Indiana University and was subsequently honored with the university's Young Alumni Award [21] as well as Distinguished Alumni Award [22]
He continued his work on the Message Passing Interface standard as a key member of the MPI Forum [23] responsible for the chapters on Collective Communication and Process Topologies as well as co-authoring the chapter on One-Sided Communications. [24]
In 2010, he joined the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign (UIUC). As lead for application performance analysis and support, he supported the design and deployment of the Blue Waters Supercomputer. [10] He also held a position as adjunct professor at UIUC's Computer Science department. He accepted a position as assistant professor at ETH Zurich in 2011, [25] where he received tenure in 2017, [26] and is full professor from 2020. [27]
Hoefler has held various visiting researcher positions at French Alternative Energies and Atomic Energy Commission in France, CINECA in Italy, as well as Argonne National Laboratory, Sandia National Laboratory, and Microsoft in the United States. [11] As a consultant, he supported Cray Inc. in the area of high-performance networking and Microsoft Corporation in the areas of quantum computing and large-scale artificial intelligence systems. He spent his sabbatical in 2019 at Microsoft helping to establish various AI supercomputing efforts including the Maia 100 system. [28] [29] [30]
Hoefler has been an elected member of the ACM SIGHPC executive committee since its founding in 2011. [31]
He was elected IEEE Fellow for “contributions to large-scale parallel processing systems and supercomputers”, [12] ACM Fellow for “foundational contributions to High-Performance Computing and the application of HPC techniques to machine learning”, [13] and he received the IEEE Sidney Fernbach Award in 2022 for “application-aware design of HPC algorithms, systems and architectures, and transformative impact on scientific computing and industry”. [3]
Hoefler received the inaugural Jack Dongarra award at ISC High Performance Conference in 2023. [32] [33] [34] He was appointed as a senior fellow of the Abu Dhabi Investment Authority Labs in 2023. [35] [36]
Hoefler is known for his contributions to the Message Passing Interface (MPI) standard. He served as author for the chapters “Collective Communication” and “Process Topologies” in MPI-2.2 and the chapters “Collective Communication”, “One-Sided Communications”, and “Process Topologies” in MPI-3 . For the MPI-3 standardization, he chaired the Collective Communications and Topology working groups. [37]
He developed principles for the implementation of nonblocking collective operations and remote memory access that are widely used in MPI implementations such as OpenMPI, MPICH, and derivatives. [38] Nonblocking collective operations such as allreduce, allgather, or broadcast form the basis of modern AI training systems. [39]
After co-authoring a pioneering paper on parallel deep learning [40] and during his sabbatical at Microsoft, he coined the term “3D parallelism” in modern artificial intelligence training that organizes data parallelism, pipeline parallelism, and operator/tensor parallelism into one consistent view. [41]
In his work on high-speed interconnects, he co-developed several award-winning network topologies [41] [42] [43] and contributed routing algorithms that are used in the OpenSM routing manager on InfiniBand computer clusters. [44]
On the application side, Hoefler focuses on improving the performance of climate simulations as a digital twin [45] [46] [47] and machine learning for climate simulations. [48] He has been a convener of the Berlin Summit in Earth Virtualization Engines [49] to develop strategies to enable global access to high-resolution climate simulations. [50] [51]
Hoefler has been vocal about improving reproducibility of performance measurements in high-performance computing [52] and later machine learning. The latter is featured in IEEE Computer Journal as a cover feature on Research Reproducibility. [53] As Technical Papers chair of ACM/IEEE Supercomputing Conference (SC18), he introduced a new revision-based review process to the conference to improve the quality of the publications. [54] His group received the SIGHPC Certificate of Appreciation for reproducible methods at the ACM/IEEE Supercomputing Conference (SC22) ACM student cluster competition. [55] His paper on HammingMesh received the ACM/IEEE Supercomputing Conference (SC22) Best Reproducibility Advancement Award. [56] [55] He also presented the opening keynote at the first ACM Conference on Reproducibility and Replicability. [57]
Hoefler and his team received six best (student) paper awards at the ACM/IEEE Supercomputing Conference between 2010 and 2023, [58] [59] [60] [61] the top conference in High-Performance Computing. Additional important awards are listed below.
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A supercomputer is a type of computer with a high level of performance as compared to a general-purpose computer. The performance of a supercomputer is commonly measured in floating-point operations per second (FLOPS) instead of million instructions per second (MIPS). Since 2022, supercomputers have existed which can perform over 1018 FLOPS, so called exascale supercomputers. For comparison, a desktop computer has performance in the range of hundreds of gigaFLOPS (1011) to tens of teraFLOPS (1013). Since November 2017, all of the world's fastest 500 supercomputers run on Linux-based operating systems. Additional research is being conducted in the United States, the European Union, Taiwan, Japan, and China to build faster, more powerful and technologically superior exascale supercomputers.
The Message Passing Interface (MPI) is a standardized and portable message-passing standard designed to function on parallel computing architectures. The MPI standard defines the syntax and semantics of library routines that are useful to a wide range of users writing portable message-passing programs in C, C++, and Fortran. There are several open-source MPI implementations, which fostered the development of a parallel software industry, and encouraged development of portable and scalable large-scale parallel applications.
Jack Joseph Dongarra is an American computer scientist and mathematician. He is a University Distinguished Professor Emeritus of Computer Science in the Electrical Engineering and Computer Science Department at the University of Tennessee. He holds the position of a Distinguished Research Staff member in the Computer Science and Mathematics Division at Oak Ridge National Laboratory, Turing Fellowship in the School of Mathematics at the University of Manchester, and is an adjunct professor and teacher in the Computer Science Department at Rice University. He served as a faculty fellow at the Texas A&M University Institute for Advanced Study (2014–2018). Dongarra is the founding director of the Innovative Computing Laboratory at the University of Tennessee. He was the recipient of the Turing Award in 2021.
David A. Bader is a Distinguished Professor and Director of the Institute for Data Science at the New Jersey Institute of Technology. Previously, he served as the Chair of the Georgia Institute of Technology School of Computational Science & Engineering, where he was also a founding professor, and the executive director of High-Performance Computing at the Georgia Tech College of Computing. In 2007, he was named the first director of the Sony Toshiba IBM Center of Competence for the Cell Processor at Georgia Tech.
William Douglas Gropp is the director of the National Center for Supercomputing Applications (NCSA) and the Thomas M. Siebel Chair in the Department of Computer Science at the University of Illinois at Urbana–Champaign. He is also the founding Director of the Parallel Computing Institute. Gropp helped to create the Message Passing Interface, also known as MPI, and the Portable, Extensible Toolkit for Scientific Computation, also known as PETSc.
The Sidney Fernbach Award established in 1992 by the IEEE Computer Society, in memory of Sidney Fernbach, one of the pioneers in the development and application of high performance computers for the solution of large computational problems as the Division Chief for the Computation Division at Lawrence Livermore Laboratory from the late 1950s through the 1970s. A certificate and $2,000 are awarded for outstanding contributions in the application of high performance computers using innovative approaches. The nomination deadline is 1 July each year.
Brutus is the central high-performance cluster of ETH Zurich. It was introduced to the public in May 2008. A new computing cluster called EULER has been announced and opened to the public in May 2014.
SC, the International Conference for High Performance Computing, Networking, Storage and Analysis, is the annual conference established in 1988 by the Association for Computing Machinery and the IEEE Computer Society. In 2019, about 13,950 people participated overall; by 2022 attendance had rebounded to 11,830 both in-person and online. The not-for-profit conference is run by a committee of approximately 600 volunteers who spend roughly three years organizing each conference.
The Seymour Cray Computer Engineering Award, also known as the Seymour Cray Award, is an award given by the IEEE Computer Society, to recognize significant and innovative contributions in the field of high-performance computing. The award honors scientists who exhibit the creativity demonstrated by Seymour Cray, founder of Cray Research, Inc., and an early pioneer of supercomputing. Cray was an American electrical engineer and supercomputer architect who designed a series of computers that were the fastest in the world for decades, and founded Cray Research which built many of these machines. Called "the father of supercomputing," Cray has been credited with creating the supercomputer industry. He played a key role in the invention and design of the UNIVAC 1103, a landmark high-speed computer and the first computer available for commercial use.
The Ken Kennedy Award, established in 2009 by the Association for Computing Machinery and the IEEE Computer Society in memory of Ken Kennedy, is awarded annually and recognizes substantial contributions to programmability and productivity in computing and substantial community service or mentoring contributions. The award includes a $5,000 honorarium and the award recipient will be announced at the ACM - IEEE Supercomputing Conference.
The K computer – named for the Japanese word/numeral "kei" (京), meaning 10 quadrillion (1016) – was a supercomputer manufactured by Fujitsu, installed at the Riken Advanced Institute for Computational Science campus in Kobe, Hyōgo Prefecture, Japan. The K computer was based on a distributed memory architecture with over 80,000 compute nodes. It was used for a variety of applications, including climate research, disaster prevention and medical research. The K computer's operating system was based on the Linux kernel, with additional drivers designed to make use of the computer's hardware.
Several centers for supercomputing exist across Europe, and distributed access to them is coordinated by European initiatives to facilitate high-performance computing. One such initiative, the HPC Europa project, fits within the Distributed European Infrastructure for Supercomputing Applications (DEISA), which was formed in 2002 as a consortium of eleven supercomputing centers from seven European countries. Operating within the CORDIS framework, HPC Europa aims to provide access to supercomputers across Europe.
The LINPACK Benchmarks are a measure of a system's floating-point computing power. Introduced by Jack Dongarra, they measure how fast a computer solves a dense n by n system of linear equations Ax = b, which is a common task in engineering.
Michael Franz is an American computer scientist best known for his pioneering work on just-in-time compilation and optimisation and on artificial software diversity. He is a Distinguished Professor of Computer Science in the Donald Bren School of Information and Computer Sciences at the University of California, Irvine (UCI), a Professor of Electrical Engineering and Computer Science in the Henry Samueli School of Engineering at UCI, and Director of UCI's Secure Systems and Software Laboratory.
ACM SIGHPC is the Association for Computing Machinery's Special Interest Group on High Performance Computing, an international community of students, faculty, researchers, and practitioners working on research and in professional practice related to supercomputing, high-end computers, and cluster computing. The organization co-sponsors international conferences related to high performance and scientific computing, including: SC, the International Conference for High Performance Computing, Networking, Storage and Analysis; the Platform for Advanced Scientific Computing (PASC) Conference; Practice and Experience in Advanced Research Computing (PEARC); and PPoPP, the Symposium on Principles and Practice of Parallel Programming.
Richard Vuduc is a tenured professor of computer science at the Georgia Institute of Technology. His research lab, The HPC Garage, studies high-performance computing, scientific computing, parallel algorithms, modeling, and engineering. He is a member of the Association for Computing Machinery (ACM). As of 2022, Vuduc serves as Vice President of the SIAM Activity Group on Supercomputing. He has co-authored over 200 articles in peer-reviewed journals and conferences.
Adrian Perrig is a Swiss computer science researcher and professor at ETH Zurich, leading the Network Security research group. His research focuses on networking and systems security, and specifically on the design of a secure next-generation internet architecture.
Michela Taufer is an Italian-American computer scientist and holds the Jack Dongarra Professorship in High Performance Computing within the Department of Electrical Engineering and Computer Science at the University of Tennessee, Knoxville. She is an ACM Distinguished Scientist and an IEEE Senior Member. In 2021, together with a team al Lawrence Livermore National Laboratory, she earned a R&D 100 Award for the Flux workload management software framework in the Software/Services category.
Anton Gunzinger is a Swiss electrical engineer and entrepreneur. He was a developer of high-performance parallelized computers.
Matthias Troyer is an Austrian physicist and computer scientist specializing in quantum computing. He is also Technical Fellow and Corporate Vice President of Quantum at Microsoft.
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