Valentina Salapura
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Valentina Salapura is a researcher and expert in high-performance computing (HPC) and computer architecture. Throughout her career, she has contributed to the design and development of advanced computing systems, focusing on scalable architectures, parallel processing, and energy-efficient computing. Her work has influenced both academic research and industry practices.
Early Life and Education
[edit]Valentina Salapura earned her Ph.D. in Computer Science from the Technische Universität Wien in Vienna, Austria. She also holds M.S. degrees in Computer Science and Electrical Engineering from the University of Zagreb in Croatia. Her early academic work focused on optimizing computer architectures and developing novel computing methodologies.
Career
[edit]Salapura has held positions at technology companies such as IBM, AMD, and Google. At IBM, she was involved in the development of the Blue Gene supercomputer. She also contributed to the Power8 processor's architecture.[1]
After her tenure at IBM, Salapura joined AMD Research, where she worked on distributed computing and supercomputing technologies. In particular, she led HPC software libraries and software architecture for the Frontier exascale system.
Currently, she is a Principal Engineer at Google, focusing on system architecture for cloud and edge computing.
Contributions to High-Performance Computing
[edit]Salapura’s work in HPC includes integrating heterogeneous computing and accelerators into hyperscale data centers. Her research into energy efficiency in computing emphasizes the design of systems that balance high performance with minimal energy consumption.[2]
Salapura was a leader in the development of the BlueGene system, contributing to the design of BlueGene/L, BlueGene/P, BlueGene/Q, and Frontier.
BlueGene/L
[edit]Blue Gene/L employed low-frequency, low-power embedded PowerPC cores with floating-point accelerators. This design traded off individual processor speed for higher power efficiency, making it suitable for massively parallel applications. The system achieved power efficiency by utilizing a large number of these low-power cores to perform computations simultaneously[3][4][5][6]
BlueGene/P
[edit]Blue Gene/P improved upon its predecessor by increasing the density of processor cores. Each rack contained 1,024 nodes with a total of 4,096 processor cores. The design focused on maximizing power efficiency, with Blue Gene/P installations ranking near the top of the Green500 lists in 2007–2008 for their energy efficiency[7][8][9][10][11]
BlueGene/Q
[edit]The BlueGene/Q system, particularly the Sequoia installation at Lawrence Livermore National Laboratory, achieved 16.32 petaflops of performance using 1,572,864 cores. This system was notable for being the first supercomputer to utilize more than one million cores. It was primarily water-cooled and consisted of 96 racks, 98,304 compute nodes, and 1.6 petabytes of memory. Sequoia was significantly more power-efficient compared to its predecessors.[12][13]
Frontier
[edit]Frontier, developed by Hewlett Packard Enterprise and AMD and installed at Oak Ridge National Laboratory, became the world's first exascale supercomputer in May 2022. Frontier is capable of achieving 1.194 exaflops in the high-performance Linpack (HPL) benchmark. The system uses 8,699,904 CPU and GPU cores and features HPE's Slingshot 11 network for data transfer. Frontier is cooled by a water system that pumps 60,000 gallons of water per minute.
Contributions to Subfields in Computer Science
[edit]Valentina Salapura has contributed to multiple subfields, including HPC, supercomputing, and distributed systems. She was pivotal in the architecture and design of Blue Gene/L and Blue Gene/Q supercomputers, which advanced quantum chromodynamics simulations.
She has also worked in cloud computing, focusing on virtualization and resiliency. Her early work on processor architecture and microarchitecture design has influenced subsequent advancements.
Awards and Recognition
[edit]Valentina Salapura has received several awards, including the ACM Gordon Bell Prize in 2006 for her work on Blue Gene/L. She is a co-inventor of over 500 patents and was named a Fellow of the IEEE in 2012 for her contributions to multiprocessor systems.[14]
Keynote Addresses
[edit]ISC 2023
[edit]At ISC 2023, Salapura explored the emerging dynamic between hyperscaler and HPC ecosystems.
ICCD 2012
[edit]At ICCD 2012, Salapura discussed the adoption of cloud computing and its implications for virtualization and resiliency.
Grace Hopper Celebration of Women in Computing 2007
[edit]At the 2007 Grace Hopper Conference, Salapura discussed the shift from faster single processors to multiprocessor systems.
Advocacy for Women in Technology
[edit]Salapura has been involved in initiatives to support and mentor women in computer science and engineering. She has participated in the Grace Hopper Celebration of Women in Computing.
Legacy and Impact
[edit]Valentina Salapura’s contributions to scalable, energy-efficient computing systems have influenced the development of next-generation supercomputers and advanced data centers.
References
[edit]- ^ Valentina Salapura, Tejas Karkhanis, Priya Nagpurkar, José E. Moreira: Accelerating business analytics applications. HPCA 2012: 413-422
- ^ Valentina Salapura, Randy Bickford, Matthias A. Blumrich, Arthur A. Bright, Dong Chen, Paul Coteus, Alan Gara, Mark Giampapa, Michael Gschwind, Manish Gupta, Shawn Hall, Ruud A. Haring, Philip Heidelberger, Dirk Hoenicke, Gerard V. Kopcsay, Martin Ohmacht, Rick A. Rand, Todd Takken, Pavlos Vranas: Power and performance optimization at the system level. Conf. Computing Frontiers 2005: 125-132
- ^ Valentina Salapura, Robert Walkup, Alan Gara: Exploiting Workload Parallelism for Performance and Power Optimization in Blue Gene. IEEE Micro 26(5): 67-81 (2006)
- ^ Pavlos Vranas, Gyan Bhanot, Matthias A. Blumrich, Dong Chen, Alan Gara, Philip Heidelberger, Valentina Salapura, James C. Sexton: Gordon Bell finalists II - The BlueGene/L supercomputer and quantum ChromoDynamics. SC 2006: 50
- ^ José E. Moreira, Valentina Salapura, George Almási, Charles Archer, Ralph Bellofatto, Peter Bergner, Randy Bickford, Matthias A. Blumrich, José R. Brunheroto, Arthur A. Bright, Michael Brutman, José G. Castaños, Dong Chen, Paul Coteus, Paul Crumley, Sam Ellis, Thomas Engelsiepen, Alan Gara, Mark Giampapa, Tom Gooding, Shawn Hall, Ruud A. Haring, Roger L. Haskin, Philip Heidelberger, Dirk Hoenicke, Todd Inglett, Gerard V. Kopcsay, Derek Lieber, David Limpert, Patrick McCarthy, Mark Megerian, Michael B. Mundy, Martin Ohmacht, Jeff Parker, Rick A. Rand, Don Reed, Ramendra K. Sahoo, Alda Sanomiya, Richard Shok, Brian E. Smith, Gordon G. Stewart, Todd Takken, Pavlos Vranas, Brian P. Wallenfelt, Michael Blocksome, Joe Ratterman: The Blue Gene/L Supercomputer: A Hardware and Software Story. Int. J. Parallel Program. 35(3): 181-206 (2007)
- ^ Valentina Salapura, José R. Brunheroto, Fernando F. Redígolo, Alan Gara: Exploiting eDRAM bandwidth with data prefetching: simulation and measurements. ICCD 2007: 504-511
- ^ Matthias A. Blumrich, Valentina Salapura, Alan Gara: Exploring the Architecture of a Stream Register-Based Snoop Filter. Trans. High Perform. Embed. Archit. Compil. 3: 93-114 (2011)
- ^ Valentina Salapura: Scaling up next generation supercomputers. Conf. Computing Frontiers 2008: 1-2
- ^ Valentina Salapura, Matthias A. Blumrich, Alan Gara: Design and implementation of the blue gene/P snoop filter. HPCA 2008: 5-14
- ^ Karthik Ganesan, Lizy Kurian John, Valentina Salapura, James C. Sexton: A Performance Counter Based Workload Characterization on Blue Gene/P. ICPP 2008: 330-337
- ^ Valentina Salapura, Karthik Ganesan, Alan Gara, Michael Gschwind, James C. Sexton, Robert Walkup: Next-Generation Performance Counters: Towards Monitoring Over Thousand Concurrent Events. ISPASS 2008: 139-146
- ^ Michael Gschwind, Valentina Salapura, Catherine Trammell, Sally A. McKee: SoftBeam: Precise tracking of transient faults and vulnerability analysis at processor design time. ICCD 2011: 404-410
- ^ Dong Chen, Noel Eisley, Philip Heidelberger, Robert M. Senger, Yutaka Sugawara, Sameer Kumar, Valentina Salapura, David L. Satterfield, Burkhard D. Steinmacher-Burow, Jeffrey J. Parker: The IBM Blue Gene/Q interconnection network and message unit. SC 2011: 26:1-26:10
- ^ "2012 elevated fellow" (PDF). IEEE Fellows Directory. Archived from the original (PDF) on February 15, 2012.