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Valentina Salapura
Valentina Salapura
Alma mater	Technische Universität Wien (PhD), University of Zagreb (M.S)
Awards	Gordon Bell Prize (2006)
	Scientific career
Fields	High-performance computing, computer architecture
Institutions	IBM, AMD, Google

Valentina Salapura is a researcher and expert in high-performance computing (HPC), supercomputing, and computer architecturet.^[2] She has contributed to designing and developing advanced computing systems, focusing on scalable architectures, parallel processing, and energy-efficient computing. Her work spans both academic research and industry applications.

Education and early work

Salapura earned her PhD 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.^[3] Her early academic work focused on optimizing computer architectures and developing computing methodologies. ^{[citation needed]}

Career

Salapura has held positions at IBM, AMD, and Google.^[4] At IBM, she contributed to the development of the Blue Gene supercomputer and was involved in the architecture of the Power8 processor.^[5]

Later, Salapura joined AMD Research, where she worked on distributed computing and supercomputing technologies, leading the development of high-performance computing (HPC) software libraries and the software architecture for the Frontier system, the world's first public exascale computer.

Contributions to high-performance computing

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.^[6]

Salapura was a leader in the development of the BlueGene system, contributing to the design of BlueGene/L, BlueGene/P, BlueGene/Q, and Frontier supercomputers.

BlueGene/L

Blue Gene/L employed low-frequency, low-power embedded PowerPC cores with floating-point accelerators. This design traded individual processor speed for higher power efficiency, making it suitable for massively parallel applications. The system reduced power consumption by utilizing many low-power cores to perform computations simultaneously.^[7]^[8]^[9]^[10]

BlueGene/P

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^[11]^[12]^[13]^[14]^[15]

BlueGene/Q

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 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.^[16]^[17]

Frontier

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 can achieve 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 per minute. ^{[citation needed]}

Contributions to subfields in computer science

Salapura has contributed to multiple subfields, including HPC, supercomputing, and distributed systems. her work has been used to advance quantum chromodynamics simulations.

She has also worked in cloud computing,^[18] focusing on virtualization and resiliency. Her early work on processor architecture and microarchitecture design has influenced subsequent advancements.

Awards and recognition

Salapura has received several awards, including the ACM Gordon Bell Prize in 2006 for her work on Blue Gene/L.^[1] She has co-invented over 500 patents and was named a Fellow of the IEEE in 2012 for her contributions to multiprocessor systems.^[19]

Keynote addresses

ISC 2023

At ISC 2023, Salapura explored the emerging dynamic between hyperscaler and HPC ecosystems.

ICCD 2012

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

At the 2007 Grace Hopper Conference, Salapura discussed the shift from faster single processors to multiprocessor systems.

References

^ ^a ^b "Valentina Salapura". awards.acm.org. Retrieved 2024-10-07.
^ "Valentina Salapura". scholar.google.com. Retrieved 2024-10-20.
^ "The geek mystique: 10 leading women in tech". Computerworld. Retrieved 2024-10-07.
^ "Dr. Valentina Salapura". LexisNexis: Nexis Uni. Zoom People Information. 2024-09-01. Retrieved 2024-10-07.
^ 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
^ Salapura, Valentina; Harper, Richard (2015-08-19). "Remote Restart for a High Performance Virtual Machine Recovery in a Cloud". 2015 IEEE 8th International Conference on Cloud Computing. Institute of Electrical and Electronics Engineers Inc. pp. 333–340. doi:10.1109/CLOUD.2015.52. ISBN 978-1-4673-7287-9.
^ "2012 elevated fellow" (PDF). IEEE Fellows Directory. Archived from the original (PDF) on February 15, 2012.