Center for Computing Research (CCR)

Center for Computing Research

Simon David Hammond

Simon David Hammond
Manager, Scalable Computer Architecture
Email: sdhammo@sandia.gov
Phone: 505/845-7897
Fax: 505/845-7442

Mailing address:
Sandia National Laboratories
P.O. Box 5800, MS 1319
Albuquerque, NM
87185-1320

I am a research scientist in the Scalable Computer Architecture group at Sandia National Laboratories. My primary research is in enabling codesign activities for the laboratories using tools such as the Mantevo mini-application suite, the Structural Simulation Toolkit (SST), the Advanced Architecture test beds and several other projects of which I am a member. This work includes activities with the Office of Science Materials in Extreme Environments (ExMatEx) and Combustion (ExaCT) codesign centers as well as the Sandia NNSA Codesign project focused on large scale production-quality engineering applications and mathematical libraries. I have research interests in high performance compilers (particularly vectorization strategies), dynamic runtimes with a focus on the just-in-time compilation and dynamic execution of code, the C++ language standard, efficient message passing, high performance numerical mathematics libraries and the analysis, modeling and optimization of large-scale parallel scientific or analytics applications.

Education/Background

I received my Master's degree (Class I, Summa Cum Laude) in Computer Science from the University of Warwick (UK) in 2006. Later that year I joined the High Performance Systems Group (now the Performance Computing and Visualization Group) at the University of Warwick for a PhD programme. The PhD research was funded by the University of Warwick (under the Warwick Fellowship Programme), the United Kingdom Technology Transfer Board and the UK Atomic Weapons Establishment (AWE). In early 2011 I completed my PhD titled "Performance Modelling and Simulation of High Performance Computing Systems" and joined the Scalable Computing department at Sandia National Laboratories as a post-doc later that year.

Projects

Software

Selected Publications & Presentations

2022	Chester, Dean, Taylor Groves, Simon David Hammond, Timothy Law, Steven Wright, Richard Smedley-Stevenson, Suhaib Fahmy, Gihan Mudalige, Stephen Jarvis, "StressBench: A Configurable Full System Network and I/O Benchmark Framework," Conference Paper, IEEE High Performance Extreme Computing Conference 2021 (HPEC), January 2022.
2021	Alwadi, Mazen, Vamsee Reddy Komareddy, Clayton Hughes, Simon David Hammond, Amro Awad, "Stealth-Persist: Architectural Support for Persistent Applications in Hybrid Memory Systems ," Conference Paper, 27th IEEE International Symposium on High-Performance Computer Architecture (HPCA-27), February 2021. Chester, D., T. Groves, Simon David Hammond, Tim Law, S. A. Wright, R. Smedley-Stevenson, S. A. Fahmy, G. R. Mudalige, S. A. Jarvis, "StressBench: A Configured Full System Network and I/O Benchmark Framework," Conference Paper, 2021 IEEE High Performance Extreme Computing Virtual Conference, September 2021. Hammond, Simon David, James H. Laros, Kevin Pedretti, Andrew J Younge, Robert J. Hoekstra, "Experiences with ARM," Presentation, NNSA/CEA Codesign Working Group Discussions, April 2021. Hammond, Simon David, Matthew Leon Curry, Vinh Quang Dang, Oksana Guba, Robert J. Hoekstra, James H. Laros, Kevin Pedretti, David Zoeller Poliakoff, Sivasankaran Rajamanickam, Christian Robert Trott, Andrew J Younge, "Fugaku and A64FX (Sandia and RIKEN Collaboration) Update - April 2021," Presentation, NNSA/RIKEN Collaboration Update April 2021, April 2021. Hughes, Clayton, Gwendolyn Renae Voskuilen, Arun F. Rodrigues, Simon David Hammond, "Simulating Next-Gen Dataflow Architectures for HPC," Abstract, 2022 SIAM Conference on Parallel Processing for Scientific Computing - Co-Design of Data Flow Accelerators for Scientific Simulations and Machine Learning, September 2021. Hughes, Clayton, Simon David Hammond, Mengchi Zhang, Tim Rogers, Yenchen Liu, Robert J. Hoekstra, "SST-GPU: A Scalable SST GPU Component for Performance Modeling and Profiling," SAND Report, January 2021. Komareddy, Vamsee Reddy, Clayton Hughes, Simon David Hammond, Amro Awad, "DeACT: Architecture-Aware Virtual Memory Support for Fabric Attached Memory Systems," Conference Paper, 27th IEEE International Symposium on High-Performance Computer Architecture (HPCA-27), February 2021. Laros, James H., Simon David Hammond, Kevin Pedretti, "Vanguard-II Application Evaluation Thrust," Presentation, Vanguard II, August 2021. Lewis, Cannada, Clayton Hughes, Simon David Hammond, Sivasankaran Rajamanickam, "Using MLIR Framework for Codesign of ML Architectures, Algorithms, and Simulation Tools," Report, January 2021. Nema, Shubham, Rohin Razdan, Arun F. Rodrigues, Karl Scott Hemmert, Gwendolyn Renae Voskuilen, Debratim Adak, Simon David Hammond, Amro Awad, Clayton Hughes, "ERAS: Enabling the Integration of Real-World Intellectual Properties (IPs) in Architectural Simulators," SAND Report, September 2021. Poliakoff, David Zoeller, Simon David Hammond, Cannada Lewis, "Kokkos Tools for Productive Development," Presentation, ASC PI Meeting in Albuquerque, NM, USA, May 2021. Rajamanickam, Sivasankaran, Tushar Krishna, Simon David Hammond, "Vision for Co-designing a Unified-Memory Centric Heterogeneous Node Architecture," Conference Paper, ASCR Workshop on Reimaging and Codesign, March 2021. Rodrigues, Arun F., Simon David Hammond, Karl Scott Hemmert, Clayton Hughes, Joseph P. Kenny, Gwendolyn Renae Voskuilen, "A-SST Initial Specification," SAND Report, October 2021. Rodrigues, Arun F., Amro Awad, Clayton Hughes, Sapan Agarwal, Michael Skoufis, Gwendolyn Renae Voskuilen, Shubham Nema, Rohin Razdan, Alan Gardner, Karl Scott Hemmert, Simon David Hammond, "SST-Explorer: Enabling System-level Performance and Reliability Analysis for Designs with Real-World IPs," Poster, ModSim 2021 Workshop on Modeling and Simulation of Systems and Applications, October 2021. Rodrigues, Arun F., Amro Awad, Clayton Hughes, Sapan Agarwal, Michael Skoufis, Gwendolyn Renae Voskuilen, Shubham Nema, Rohin Razdan, Alan Gardner, Karl Scott Hemmert, Simon David Hammond, "SST-Explorer: Enabling System-level Performance and Reliability Analysis for Designs with Real-World IPs," Presentation, ModSim 2021, October 2021. Voskuilen, Gwendolyn Renae, Arun F. Rodrigues, Clayton Hughes, Karl Scott Hemmert, Simon David Hammond, "Towards an Extensible Framework for Accelerated System Simulation," Abstract, Workshop on Modeling & Simulation of Systems and Applications 2021, May 2021. Voskuilen, Gwendolyn Renae, Arun F. Rodrigues, Clayton Hughes, Karl Scott Hemmert, Simon David Hammond, "Towards an Extensible Framework for Accelerated System Simulation ," Poster, Workshop on Modeling and Simulation of Systems and Applications, October 2021. Younge, Andrew J, Simon David Hammond, Kevin Pedretti, James H. Laros, "Containers and the Arm Ecosystem," Presentation, International Supercomputing Conference 2021, June 2021.
2020	Grant, Ryan, Simon David Hammond, James H. Laros, Michael J. Levenhagen, Stephen Lecler Olivier, Kevin Pedretti, Harry Lee Ward, Andrew J Younge, "Enabling Power Measurement and Control on Astra: The First Petascale Arm Supercomputer," Conference Paper, Cray User Group, November 2020. Hammond, Simon David, Andrew J Younge, Kevin Pedretti, James H. Laros, "Early Experiences with A64FX," Presentation, Arm User Group Meeting, November 2020. Hammond, Simon David, "HPC and Designing the Future of Hardware," Presentation, Presentation to Computer Science Students at NCSU, November 2020. Hughes, Clayton, Simon David Hammond, Robert J. Hoekstra, "CDFG Extraction Tool for LLVM," SAND Report, January 2020. Komareddy, Vamsee Reddy, Clayton Hughes, Simon David Hammond, Jagadish Kotra, Amro Awad, "PreFAM: Understanding the Impact of Prefetching in Fabric-Attached Memory Architectures ," Conference Paper, The International Symposium on Memory Systems (MEMSYS'20), October 2020. Pedretti, Kevin, Andrew J Younge, Simon David Hammond, James H. Laros, Matthew Leon Curry, Michael J. Aguilar, Robert J. Hoekstra, Ronald B. Brightwell, "Chronicles of Astra: Challenges and Lesson from the First Petascale Arm Supercomputer," Conference Paper, SC20 Conference Tutorial in Atlanta, GA, USA, November 2020. Pedretti, Kevin, James H. Laros, Simon David Hammond, "Experiences Scaling a Production Arm Supercomputer to Petaflops and Beyond," Presentation, Slideshare with external collaborators, March 2020.
2019	Chester, Dean, Steven Wright, Simon David Hammond, Timothy Law, Richard Smedley-Stevenson, Sateesh Maheswaran, Stephen A Jarvis, "Full-System Modeling and Simulation: Contributions Towards Coupling, Contention, and I/O," Poster, Workshop on Modeling & Simulation of Systems and Applications 2019 (ModSim 2019), August 2019. Hammond, Simon David, Clayton Hughes, Vamsee Reddy Komareddy, Amro Awad, Gwendolyn Renae Voskuilen, Arun F. Rodrigues, Karl Scott Hemmert, Anthony L. Lentine, Robert J. Hoekstra, "Disaggregated Memory Architectures for Future High-Performance Computing," SAND Report, December 2019. Hammond, Simon David, Clayton Hughes, Michael J. Levenhagen, Courtenay T. Vaughan, Andrew J Younge, Benjamin Schwaller, Michael J Aguilar, Kevin Pedretti, James H. Laros, "Evaluating the Marvell ThunderX2 Server Processor for HPC Workloads," Conference Paper, The 6th Special Session on High-Performance Computing Benchmarking and Optimization (HPBench 2019), July 2019. Hammond, Simon David, Howard Pritchard, Jr., "NNSA Explorations - Arm for Supercomputing," Conference Paper, ATPESC - Argonne Training Program on Extreme-Scale Computing in Chicago, Illinois, United States of America, July 2019. Hammond, Simon David, Kevin Pedretti, James H. Laros, Andrew J Younge, Courtenay T. Vaughan, Paul Lin, Robert J. Hoekstra, "Vanguard Astra Application Update - Summer 2019," Presentation, NNSA/CEA Collaboration Meeting - Summer 2019, June 2019. Hughes, Clayton, Simon David Hammond, Gwendolyn Renae Voskuilen, Arun F. Rodrigues, Karl Scott Hemmert, Robert J. Hoekstra, "ASC Milestone 3812: SST-GPGPU," Presentation, August 2019. Hughes, Clayton, Simon David Hammond, Mahmoud Khairy, Mengchi Zhang, Timothy Rogers, Robert J. Hoekstra, "Balar: A SST GPU Component for Performance Modeling and Profiling ," SAND Report, September 2019. Hughes, Clayton, Simon David Hammond, Michael J. Levenhagen, Courtenay T. Vaughan, Andrew J Younge, Benjamin Schwaller, Michael J. Aguilar, Kevin Pedretti, James H. Laros, "Evaluating the Marvell ThunderX2 Server Processor for HPC Workloads," Presentation, The 6th Special Session on High-Performance Computing Benchmarking and Optimization (HPBench 2019), July 2019. Hughes, Clayton, James H. Laros, Kevin Pedretti, Simon David Hammond, Andrew J Younge, Robert J. Hoekstra, "Vanguard Astra: A Prototype Petascale Arm Supercomputer," Presentation, University of Central Forida 2019 Seminar Series, January 2019. Hughes, Clayton, James H. Laros, Kevin Pedretti, Simon David Hammond, Andrew J Younge, Robert J. Hoekstra, "Vanguard Astra: A Prototype Petascale Arm Supercomputer," Presentation, University of Florida Tech Talk, January 2019. Khairy, Mahmoud, Mengchi Zhang, Roland Green, Simon David Hammond, Robert J. Hoekstra, Timothy Rogers, Clayton Hughes, "SST-GPU: An Execution -Driven CUDA Kernel Scheduler and Streaming-Multiprocessor Compute Model ," SAND Report, February 2019. Kommareddy, Vamsee Reddy, Amro Awad, Clayton Hughes, Simon David Hammond, "Enforcing Fairness in Disaggregated Non-Volatile Memory Systems ," Conference Paper, Programmability and Architectures for Heterogeneous Multicores (MULTIPROG-2019) , January 2019. Kommareddy, Vamsee Reddy, Simon David Hammond, Clayton Hughes, Ahmad Smith, Amro Awad, "Page Migration Support for Disaggregated Non-Volatile Memories ," Conference Paper, The International Symposium on Memory Systems (MEMSYS 2019) , September 2019. Pedretti, Kevin, James H. Laros, Simon David Hammond, "Experiences Scaling a Production Arm Supercomputer to Petaflops and Beyond," Presentation, Arm Research Summit, September 2019. Pedretti, Kevin, James H. Laros, Simon David Hammond, Andrew J Younge, Paul Lin, Matthew Leon Curry, Courtenay T. Vaughan, "FY19 L2 Milestone #6810 Report: Astra Acceptance and Software Environment Development," SAND Report, September 2019. Pedretti, Kevin, James H. Laros, Simon David Hammond, "FY19 L2 Milestone #6810: Astra Acceptance and Software Environment Development," Presentation, FY19 L2 Milestone #6810 Review, September 2019. Slota, George M., Jonathan W. Berry, Simon David Hammond, Stephen Lecler Olivier, Cynthia A. Phillips, Sivasankaran Rajamanickam, "Scalable Generation of Graphs for Benchmarking HPC Community-Detection Algorithms," Conference Paper, International Conference for High Performance Computing, Networking, Storage and Analysis (SC'19) in Denver, CO, USA, November 2019. Younge, Andrew J, Kevin Pedretti, James H. Laros, Simon David Hammond, "An Update on Astra: Experiences Running the first Petascale ARM Supercomputer," Presentation, Linaro Connect in San Diego, CA, USA, September 2019.
2018	Alvin, Kenneth F., James H. Laros, Robert J. Hoekstra, Kevin Pedretti, Simon David Hammond, "DOE NNSA Vanguard Program ," Presentation, CEA-NNSA Annual Computing Sciences Meeting in Paris, , France from 06/05/2018 - 06/07/2018, June 2018. Hammond, Simon David, Robert J. Hoekstra, "Analyzing Build System Pressure for the ASC Program," Presentation, ASC Codesign L2 Milestone (2018), September 2018. Hammond, Simon David, "Codesign Opportunities for the ARM Eco-System," Presentation, ARM HPC Codesign Opportunities, July 2018. Hammond, Simon David, Courtenay T. Vaughan, Clayton Hughes, "Evaluating the Intel Skylake Xeon Processor for HPC Workloads," Conference Paper, International Conference on High Performance Computing and Simulation (HPCS 2018), July 2018. Hammond, Simon David, Clayton Hughes, "Introduction to the Structural Simulation Toolkit (SST)," Presentation, April 2018. Hammond, Simon David, Christian Robert Trott, Daniel Alejandro Ibanez, Daniel Sunderland, "Profiling and Debugging Support for Performance Portable Programming Models ," Abstract, 3rd International Workshop on Performance Portable Programming Models for Accelerators (P^3MA), June 2018. Hammond, Simon David, Robert J. Hoekstra, "Sandia ATDM Performance Analysis Project (2018 Spring Update) ," Abstract, Exascale Computing Project Software Technology Project Update (Spring 2018), April 2018. Hammond, Simon David, Gwendolyn Renae Voskuilen, Clayton Hughes, Amro Awad, Arun F. Rodrigues, Karl Scott Hemmert, Michael J. Levenhagen, "SST Simulation Framework (and Complex Memory)," Presentation, Exascale Computing Project All Hands Meeting 2018, February 2018. Hughes, Clayton, Amro Awad, Simon David Hammond, Arun F. Rodrigues, Karl Scott Hemmert, Robert J. Hoekstra, "Analyzing Exascale Memory Architectures Using the SST Toolkit," Presentation, 18th SIAM Conference on Parallel Processing for Scientific Computing, March 2018. Hughes, Clayton, Simon David Hammond, Gwendolyn Renae Voskuilen, Arun F. Rodrigues, Karl Scott Hemmert, Robert J. Hoekstra, "Dataflow Architectural Model for SST: CDFG Extraction," SAND Report, July 2018. Hughes, Clayton, Robert J. Hoekstra, Simon David Hammond, "Spatial Advisor and SAPPC: Early Results (r2)," Presentation, A21 Applications, August 2018. Hughes, Clayton M., Simon David Hammond, "The Challenges of Exascale Computing," Presentation, April 2018. Hughes, Clayton M., Simon David Hammond, Courtenay T. Vaughan, "Evaluating the Intel Skylake Xeon Processor for HPC Workloads ," Presentation, Special Session on High Performance Computing Benchmarking and Optimization, HPBench, July 2018. Kommareddy, V.R., Clayton M. Hughes, Simon David Hammond, Amro Awad, "Opal: A Centralized Memory Manager for Investigating Disaggregated Memory Systems," SAND Report, August 2018. Laros, James H., Kevin Pedretti, Simon David Hammond, Michael J. Aguilar, Matthew Leon Curry, Ryan Grant, Robert J. Hoekstra, Ruth Ann Klundt, Stephen T. Monk, Jeffry Brandon Ogden, Stephen Lecler Olivier, Randall Don Scott, Harry Lee Ward, Andrew J Younge, "FY18 L2 Milestone #8759 Report: Vanguard, Astra,and ATSE? an ARM-based Advanced Prototype System and Software Environment," SAND Report, August 2018. Laros, James H., Kevin Pedretti, Simon David Hammond, "User Access Program for the NNSA/ASC Vanguard/Astra Platform," Presentation, NNSA/Vanguard/Astra, August 2018. Levenhagen, Michael J., Simon David Hammond, Karl Scott Hemmert, "Towards Lightweight and Scalable Simulation of Large-Scale OpenSHMEM Applications," Conference Paper, OpenSHMEM 2018: Fifth Workshop on OpenSHMEM and Related Technologies, August 2018. Levenhagen, Michael J., Simon David Hammond, Karl Scott Hemmert, "Towards Lightweight and Scalable Simulation of Large-Scale OpenSHMEM Applications," Conference Paper, OpenSHMEM 2018: Fifth Workshop on OpenSHMEM and Related Technologies, August 2018. Pedretti, Kevin, James H. Laros, Simon David Hammond, "Maturing the ARM Software Ecosystem for U.S. DOE/ASC Supercomputing," Presentation, 18th SIAM Conference on Parallel Processing for Scientific Computing, March 2018. Pedretti, Kevin, James H. Laros, Simon David Hammond, "Vanguard Astra: Maturing the ARM Software Ecosystem for U.S. DOE/ASC Supercomputing," Presentation, Fourth International Workshop on Communication Architectures for HPC, Big Data, Deep Learning and Clouds at Extreme Scale (ExaComm'18), June 2018. Vaughan, Courtenay T., Jeanine Cook, Robert E. Benner, Dennis Dinge, Paul Lin, Clayton Hughes, Robert J. Hoekstra, Simon David Hammond, "On the Use of Vectorization in Production Engineering Workloads ," Conference Paper, Cray User Group 2018 (CUG 2018), May 2018.
2017	Ang, James A, Jeanine Cook, Stefan P. Domino, Micheal W. Glass, Simon David Hammond, Karl Scott Hemmert, Robert J. Hoekstra, James H. Laros, Paul Lin, Robert Neely, Arun F. Rodrigues, Christian Robert Trott, "Exascale Co-design Progress and Accomplishments," Book, Convergence of Big Data and High-Performance Computing, January 2017. Awad, Amro, Simon David Hammond, Clayton Hughes, Arun F. Rodrigues, Karl Scott Hemmert, Robert J. Hoekstra, " Performance analysis for using non-volatile memory DIMMs: opportunities and challenges ," Conference Paper, Proceedings of the International Symposium on Memory Systems (MEMSYS '17), October 2017. Awad, Amro, Simon David Hammond, Gwendolyn Renae Voskuilen, Clayton Hughes, Arun F. Rodrigues, Robert J. Hoekstra, "Messier: A Detailed NVM-Based DIMM Model for the SST Simulation Framework," SAND Report, February 2017. Awad, Amro, Gwendolyn Renae Voskuilen, Simon David Hammond, Robert J. Hoekstra, "Samba: A Detailed Memory Management Unit (MMU) for the SST Simulation Framework," SAND Report, January 2017. Bender, Michael A., Jonathan W. Berry, Simon David Hammond, Karl Scott Hemmert, Samuel McCauley, Branden J. Moore, Benjamin Moseley, Cynthia A. Phillips, David Richard Resnick, Arun F. Rodrigues, "Two-level main memory co-design: Multi-threaded algorithmic primitives, analysis, and simulation," Journal Article, Journal of Parallel and Distributed Computing, Vol. 102, pp. 213–228, Accepted/Published January 2017. DeConinck, Adam, Hai Nam, David Morton, Amanda Bonnie, Cory Lueninghoener, James M. Brandt, Ann C. Gentile, Kevin Pedretti, Anthony Michael Agelastos, Courtenay T. Vaughan, Simon David Hammond, Benjamin A. Allan, Mike Davis, Jason John Repik, "Runtime collection and analysis of system metrics for production monitoring of Trinity Phase II," Conference Paper, Cray Users Group, May 2017. Edwards, Harold C., Christian Robert Trott, Daniel Sunderland, Nathan David Ellingwood, Simon David Hammond, Greg Mackey, Galen Shipman, Fernanda Foertter, "Kokkos: Performance Portability for C++ Codes," Poster, ECP All Hands Meeting, February 2017. Garcia de Gonzalo, Simon, Simon David Hammond, Christian Robert Trott, Hwu Wen-mei, "Revisiting Online Autotuning for Sparse-Matrix Vector Multiplication Kernels on Next-Generation Architectures," Conference Paper, 19th IEEE International Conference on High Performance Computing and Communications (HPCC17), December 2017. Hammond, Simon David, Christian Robert Trott, "Optimizing the Performance of Sparse-Matrix Vector Products on Next-Generation Processors," SAND Report, June 2017. Hammond, Simon David, Arun F. Rodrigues, Karl Scott Hemmert, Gwendolyn Renae Voskuilen, Michael J. Levenhagen, Clayton Hughes, Robert J. Hoekstra, James A. Ang, "Towards an Open Source Eco-System for Future HPC Designs," Workshop Paper, 2017 Workshop on Open Source Supercomputing (OpenSuCo 2017), November 2017. Kim, Kyungjoo, Timothy B. Costa, Mehmet Deveci, Andrew Michael Bradley, Simon David Hammond, Murat E. Guney, Sarah Knepper, Shane Story, Sivasankaran Rajamanickam, "Designing Vector-Friendly Compact BLAS and LAPACK Kernels," Conference Paper, SC17, November 2017. Olivier, Stephen Lecler, Simon David Hammond, Alejandro Duran, "Double Buffering for MCDRAM on Second Generation Intel Xeon Phi Processors with OpenMP," Conference Paper, 13th International Workshop on OpenMP, September 2017. Pedretti, Kevin, James H. Laros, Simon David Hammond, "Maturing the ARM Software Ecosystem for U.S. DOE/ASC Supercomputing," Presentation, ARM HPC User Group at SC17, November 2017. Trott, Christian Robert, Harold C. Edwards, Daniel Sunderland, Simon David Hammond, "Preparing Sandia's Application Portfolio for the Future Using Kokkos," Presentation, SIAM CSE 2017, February 2017. Vaughan, Courtenay T., Simon David Hammond, Christian Robert Trott, Dennis Dinge, Paul Lin, Douglas Michael Pase, Robert E. Benner, Jeanine Cook, Robert J. Hoekstra, "Codesign for Production Applications," Poster, SIAM CSE 2017, March 2017. Vaughan, Courtenay T., Simon David Hammond, Dennis Dinge, Paul Lin, Douglas Michael Pase, Christian Robert Trott, Jeanine Cook, Clayton Hughes, Robert J. Hoekstra, "Next Generation Science Applications for the Next Generation of Supercomputing," Conference Paper, Cray Users Group, May 2017. Voskuilen, Gwendolyn Renae, Arun F. Rodrigues, Michael P Frank, Simon David Hammond, "The Impact of Increasing Memory System Diversity on Applications," Presentation, Salishan Conference on High Speed Computing, April 2017. Wolf, Michael, Mehmet Deveci, Jonathan W. Berry, Simon David Hammond, Sivasankaran Rajamanickam, "Fast Linear Algebra-Based Triangle Counting with KokkosKernels," Conference Paper, IEEE HPEC 2017 (Graph Challenge), September 2017.
2016	Ang, James A., Richard Frederick Barrett, Robert E. Benner, Daniel Burke, Cy Chan, Jeanine Cook, Christopher S Daley, David Donofrio, Simon David Hammond, Karl Scott Hemmert, Robert J. Hoekstra, Khaled Ibrahim, Suzanne M. Kelly, Hoang Le, Vitus J. Leung, George Michelogiannakis, David Richard Resnick, Arun F. Rodrigues, John Shalf, Dylan Stark, Didem Unat, Nick J. Wright, Gwendolyn Renae Voskuilen, "Abstract Machine Models and Proxy Architectures for Exascale Computing (Version 2.0)," SAND Report, June 2016. Groves, Taylor, Ryan E. Grant, Karl Scott Hemmert, Simon David Hammond, Michael J. Levenhagen, Dorian Arnold, "(SAI) Stalled, Active and Idle: Characterizing Power and Performance of Large-Scale Dragonfly Networks," Conference Paper, IEEE Cluster 2016, September 2016. Trott, Christian Robert, Harold C. Edwards, Nathan David Ellingwood, Simon David Hammond, "Kokkos – Performance Portability Today," Presentation, DOE COE Performance Portability Meeting, April 2016. Trott, Christian Robert, Harold C. Edwards, Nathan David Ellingwood, Simon David Hammond, "Kokkos: Portability, Performance, Productivity," Presentation, Programming Models & Co-Design Meeting, February 2016. Trott, Christian Robert, Anthony Michael Agelastos, Victor Brunini, Stefan P. Domino, Travis C. Fisher, Simon David Hammond, Paul Lin, "NALU Assembly - Prototyping the NGP Transition," Presentation, Programming Models & Co-Design Meeting, February 2016. Trott, Christian Robert, Simon David Hammond, Stan Gerald Moore, Tzu-Ray Shan, "Sustainability and Performance through Kokkos: A Case Study with LAMMPS," Presentation, GTC 2016, April 2016. Vaughan, Courtenay T., Dennis Dinge, Paul Lin, Simon David Hammond, Jeanine Cook, Christian Robert Trott, Anthony Michael Agelastos, Douglas Michael Pase, Robert E. Benner, Mahesh Rajan, Robert J. Hoekstra, Kendall H. Pierson, "Early Experiences with Trinity - The First Advanced Technology Platform for the ASC Program," Conference Paper, Cray User Group Conference, May 2016. Vaughan, Courtenay T., Simon David Hammond, "On the Path to Trinity - Experiences Bringing Codes to the Next Generation ASC Platform ," Presentation, SIAM Conference on Parallel Processing for Scientific Computing, April 2016. Voskuilen, Gwendolyn Renae, Arun F. Rodrigues, Simon David Hammond, "Analyzing allocation behavior for multi-level memory," Conference Paper, The International Symposium on Memory Systems, October 2016. Voskuilen, Gwendolyn Renae, Michael P Frank, Simon David Hammond, Arun F. Rodrigues, "Evaluating the Opportunities for Multi-Level Memory – An ASC 2016 L2 Milestone," SAND Report, September 2016. Voskuilen, Gwendolyn Renae, Arun F. Rodrigues, Michael P Frank, Simon David Hammond, "Evaluating the Opportunities for Multi-level Memory - An ASC 2016 L2 Milestone," SAND Report, September 2016. Voskuilen, Gwendolyn Renae, Michael P Frank, Simon David Hammond, Arun F. Rodrigues, "Evaluating the Opportunities for Multi-Level Memory – An ASC 2016 L2 Milestone," SAND Report, September 2016.
2015	Bender, Michael, Jonathan Berry, Simon David Hammond, Karl Scott Hemmert, Samuel McCauley, Branden J. Moore, Benjamin Moseley, Cynthia Phillips, David Resnick, Arun Rodrigues, "Two-Level Main Memory Co-Design: Multi-Threaded Algorithmic Primitives, Analysis, and Simulation," Conference Paper, IEEE International Parallel and Distributed Computing Symposium, May 2015. Bennett, Janine Camille, Robert L. Clay, Gavin Matthew Baker, Marc Gamell, David S Hollman, Samuel Knight, Hemanth Kolla, Gregory D. Sjaardema, Nicole Lemaster Slattengren, Keita Teranishi, Jeremiah J Wilke, Matthew Tyler Bettencourt, Steven W. Bova, Ken Franko, Paul Lin, Ryan Grant, Simon David Hammond, Stephen Lecler Olivier, Laxmikant Kale, Nikhil Jain, Eric Mikida, Alex Aiken, Mike Bauer, Wonchan Lee, Elliott Slaughter, Sean Treichler, Martin Berzins, Todd Harman, Alan Humphrey, John Schmidt, Daniel Sunderland, Pat McCormick, Samuel Gutierrez, Martin Schulz, Abhinav Bhatele, DAvid Boehme, Peer-Timo Bremer, Todd Gamblin, "ASC ATDM Level 2 Milestone #5325: Asynchronous Many-Task Runtime System Analysis and Assessment for Next Generation Platforms ," SAND Report, September 2015. Hammond, Simon David, "Challenges of Codesign," Presentation, NNSA ASC PI Meeting, February 2015. Hammond, Simon David, Christian Robert Trott, Jeanine Cook, Dennis Dinge, Micheal W. Glass, Robert J. Hoekstra, Paul Lin, Mahesh Rajan, Courtenay T. Vaughan, "Codesign at Sandia: LULESH and MiniAero," Presentation, ASC CoDesign L2 Milestone Review Livermore, August 2015. Hammond, Simon David, "Preparations for Trinity KNL ," Presentation, J34X Extreme Scale Joint Working Group (AWE and NNSA Tri Labs), February 2015. Hammond, Simon David, Gwendolyn Renae Voskuilen, "Scale-Free Memory Access Patterns," Presentation, Salesian Conference on High Performance Computing, April 2015. Hammond, Simon David, "Towards Accurate Application Characterization for Exascale (APEX)," SAND Report, September 2015. Hammond, Simon David, "Why LINPACK (and STREAM) Aren't the Answer," Presentation, March 2015. Hammond, Simon David, "Why LINPACK (and STREAM) Aren't the Answer," Presentation, March 2015. Rajan, Mahesh, Douglas W. Doerfler, Simon David Hammond, "Trinity Benchmarks on Intel Xeon Phi (Knights Corner)," SAND Report, January 2015. Rumley, Sebastien, Madeleine Glick, Simon David Hammond, Arun F. Rodrigues, Keren Bergman, "Design Methodology for Optimizing Optical Interconnection Networks in High Performance Systems," Conference Paper, International Supercomputing (ISC-HPC 2015), July 2015. Trott, Christian Robert, Harold C. Edwards, Simon David Hammond, "Proxy App Usecases at Sandia," Presentation, AMD Fast Forward Update Meeting, August 2015.
2014	Ang, James A, Richard F Barrett, Robert E Benner, D Burke, C Chan, D Donofrio, Simon D Hammond, Karl S Hemmert, Suzanne M Kelly, H Le, Vitus J Leung, David R Resnick, Arun F Rodrigues, J Shalf, Dylan Stark, D Unat, N J Wright, "Abstract Machine Models and Proxy Architectures for Exascale Computing," Conference Paper, Co-HPC, November 2014. Barrett, Brian, Ronald B. Brightwell, Ryan E. Grant, Simon David Hammond, Karl Scott Hemmert, "An Evaluation of MPI Message Rate on Hybrid-Core Processors," Journal Article, International Journal of High Performance Computing Applications, Vol. 28, No. 4, pp. 415–424, Accepted/Published November 2014. Hammond, Simon David, Michael J. Levenhagen, Karl Scott Hemmert, Arun F. Rodrigues, Branden J. Moore, "Exploring the Concept of Motifs," Presentation, Department of Energy Workshop on Modeling and Simulation (MODSIM2014), August 2014. Trott, Christian Robert, Simon David Hammond, Aidan P. Thompson, "SNAP: Strong Scaling High Fidelity Molecular Dynamics Simulations on Leadership-Class Computing Platforms," Conference Paper, International Supercomputing Conference 2014 (ISC14), June 2014.
2013	Ang, James A, Richard F Barrett, Simon D Hammond, Arun F Rodrigues, "Emerging High Performance Computing Systems and Next Generation Engineering Analysis Applications," Conference Paper, Pacific Rim Workshop on Innovations in Civil Infrastructure Engineering , January 2013. Barnette, Daniel W., Richard F. Barrett, Simon D. Hammond, Jagan Jayaraj, James H. Laros, III, "Using Miniapplications in a Mantevo Framework for Optimizing Sandia's SPARC CFD Code on Multi-Core, Many-Core, and GPU-Accelerated Compute Platforms," Conference Paper, 51st AIAA ASM Conference, January 2013. Barrett, Brian, Ronald B. Brightwell, Karl Scott Hemmert, Simon David Hammond, "The Impact of Hybrid-Core Processors on MPI Message Rate," Conference Paper, EuroMPI 2013, September 2013. Barrett, Richard F., Courtenay T. Vaughan, Simon D. Hammond, Duncan Roweth, "Application Explorations for Future Interconnects," Conference Paper, Workshop on Large-Scale Parallel Processing, at the International Parallel and Distributed Processing Symposium: IPDPS 2013, May 2013. Barrett, Richard F., Dougles W. Doerfler, Sudip S. Dosanjh, Simon D. Hammond, Karl S. Hemmert, Michael A. Heroux, Paul T. Lin, Kevin T. Pedretti, Arun F. Rodrigues, Timothy G. Trucano, Justin P. Lutjiens, "Exascale Design Space Exploration and Co-design," Journal Article, Future Generation Computer Systems, Accepted/Published August 2013. Cordery, M.J., B. Austin, H.J. Wassermann, C.S. Daley, N.J. Wright, Simon David Hammond, Douglas W. Doerfler, "Analysis of Cray XC30 Performance Using Trinity-NERSC-8 Benchmarks and Comparison with Cray XE6 and IBM BG/Q," Workshop Paper, 5th International Workshop on Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems (PMBS14), November 2013. Hammond, Simon David, "The Path to Exascale - Experiences Porting and Debugging for Intel Xeon Phi," Presentation, Birds of a Feather: Early Experiences Developing and Debugging on the Intel Xeon Phi Coprocessor at Supercomputing 2013, November 2013. Tang, Li, Xiaobo Sharon Hu, Danny Ziyi Chen, Michael T. Niemier, Richard F. Barrett, Simon D. Hammond, Ming-Yu Hsieh, "GPU Acceleration of Data Assembly in Finite Element Methods and Its Energy Implications," Conference Paper, The 24th IEEE International Conference on Application-specific Systems, Architectures and Processors (ASAP13), June 2013. Trott, Christian Robert, Harold C. Edwards, Simon David Hammond, "Towards Performance-Portable Applications through Kokkos: A Case Study with LAMMPS," Presentation, SC13, November 2013.
2012	Barrett, Richard, Paul Crozier, Douglas Doerfler, Simon Hammond, Michael Heroux, Paul Lin, Timothy Trucano, "Assessing the Predictive Capabilities of Mini-applications," Poster, The International Conference for High Performance Computing, Networking, Storage and Analysis (SC12), November 2012. Barrett, Richard F., Simon D. Hammond, Courtenay T. Vaughan, Doug W. Doerfler, Michael A. Heroux, Justin P. Luitjens, Duncan Roweth, "Navigating An Evolutionary Fast Path to Exascale," Conference Paper, . Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems (PMBS12), November 2012. Barrett, Richard F., Paul S. Crozier, Doug W. Doerfler, Simon D. Hammond, Michael A. Heroux, Heidi K. Thornquist, Timothy G. Trucano, Courtenay T. Vaughan, "Summary of Work for ASC L2 Milestone 4465: Characterize the Role of the Mini-Application in Predicting Key Performance Characteristics of Real Applications," SAND Report, June 2012. Hammond, Simon D, James A. Ang, Richard F Barrett, Douglas Doerfler, James H Laros, III, Christian R Trott, "The Path to Exascale - Early Experiences with Heterogeneous Compute," Presentation, AMD Fusion Developers Summit, June 2012. Rajan, Mahesh, Doug W. Doerfler, Paul T. Lin, Simon D. Hammond, Richard F. Barrett, Courtenay T. Vaughan, "Unprecedented Scalability and Performance of the new NNSA Tri-Lab Capacity Cluster 2 (TLCC2)," Conference Paper, Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems (PMBS12), November 2012.

Awards & Recognition


2019	Hammond, Simon, Other External Recognition, Organizing Committee, Salishan Conference, April 21, 2019 – April 25, 2019. Laros, James H., David J. Martinez, Jeffry Brandon Ogden, Matthew Leon Curry, Ryan Grant, Kevin Pedretti, Harry Lee Ward, Andrew J Younge, Simon David Hammond, Ruth Ann Klundt, Randall Don Scott, Employee Recognition Award, ERA Award - Astra Supercomputer Team, Sandia National Laboratories, The Astra Supercomputer Team procured the world’s largest high-performance computing system based on the Arm processor, working on a very aggressive schedule to obtain Sandia’s fastest computer, meeting several important programmatic and technical milestones., February 5, 2019.
2018	Hammond, Simon David, Review Board, ACM/IEEE International Conference for High Performance Computing, Networking, Storage, and Analysis 2018 (SC18), Conference, April 18, 2018. Hammond, Simon David, Review Board, International Conference on Parallel Processing Technical Reviewer, Conference, April 18, 2018. Hammond, Simon David, Clayton Hughes, Invited Talk, Introduction to the Structural Simulation Toolkit (SST) , University of Central Florida in Orlando, Florida, United States of America, April 2, 2018. Hammond, Simon David, Review Board, Technical Review Lead for Hardware and Interconnects Track of the ACM/IEEE International Conference for High Performance Computing, Networking, Storage, and Analysis 2018 (SC18), ACM/IEEE, March 28, 2018 – November 21, 2018. Hughes, Clayton, Simon David Hammond, Invited Talk, The Challenges of Exascale Computing , University of Central Florida in Orlando, Florida, United States of America, April 1, 2018. Laros, James Howard, III, Simon Hammond, Matthew Curry, Robert J. Hoekstra, Ryan Grant, Kevin Pedretti, Harry Lee Ward, Kenneth F. Alvin, Ashley Avallone, Andrew J Younge, Randall Don Scott, Ruth Ann Klundt, Stephen T. Monk, Jesse Hubert Livesay, Jeffry Brandon Ogden, David J. Martinez, Michael J. Aguilar, Robert Wilcox, Kevin Jameson, Award, Defense Programs Award of Excellence, Exceptional Achievement, National Nuclear Security Administration, Astra, first petascale Arm Supercomputer, October 1, 2018.
2017	Hammond, Simon David, Review Board, 31st IEEE International Parallel & Distributed Processing Symposium (IPDPS17), Conference, October 1, 2016 – January 31, 2017. Hammond, Simon David, Review Board, CCGrid 2017, Conference, October 1, 2016 – January 20, 2017. Hammond, Simon David, Review Board, International Workshop on Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems (PMBS17), Conference/Workshop, April 1, 2017 – November 21, 2017. Laros, James Howard, III, Kevin Pedretti, Anthony Michael Agelastos, Ann C. Gentile, Ryan Grant, Karl Scott Hemmert, Robert J. Hoekstra, Michael J. Levenhagen, Stephen Lecler Olivier, Christian Robert Trott, David B. Karelitz, Simon Hammond, Other External Recognition, 2017 Defense Programs Award of Excellence, National Nuclear Security Administration, Trinity High Performance Computing Team for significant contributions to the Stockpile Stewardship Program, October 1, 2017. Wolf, Michael, Mehmet Deveci, Jonathan W. Berry, Simon David Hammond, Sivasankaran Rajamanickam, Award, Champion of Graph Challenge, IEEE/DARPA/Amazon, Fastest triangle counting algorithm., September 13, 2017.
2015	Bender, Michael, Jonathan Berry, Simon Hammond, Karl Scott Hemmert, Samuel McCauley, Branden Moore, Benjamin Moseley, Cynthia Phillips, David Resnick, Arun Rodrigues, Best Paper/Poster, Best Algorithms Paper, IEEE, Paper "Two-Level Main Memory Co-Design: Multi-Threaded Algorithmic Primitives, Analysis, and Simulation", May 1, 2015. Hammond, Simon David, Review Board, Technical Reviewer, Cluster Computing Journal, January 1, 2015 – December 31, 2015.
2014	Hammond, Simon David, Review Board, Review Member for First International Workshop on Representative Applications (WRAp 2015), IEEE Cluster 2015, May 4, 2014. Hammond, Simon David, Review Board, Technical Review Member - Workshop on Accelerator Programming using Directives 2014 (WACCPD), IEEE/ACM Supercomputing Conference 2014, November 1, 2014. Hammond, Simon David, Review Board, Technical Reviewer for IEEE Transaction on Parallel and Distributed Systems, IEEE, March 1, 2014. Hammond, Simon David, Journal/Book Editor, Technical Reviewer for the Journal of Parallel and Distributed Computing, Elsevier Publishing, March 1, 2014. Hammond, Simon David, Review Board, Workshop Program Co-Chair for 5th International Workshop on Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems (PMBS14), IEEE/ACM Supercomputing Conference 2014 (SC14), November 1, 2014.
2013	Heroux, Michael A., Richard Frederick Barrett, James Michael Willenbring, Daniel W Barnette, David Beckingsale, James F Belak, Mike Boulton, Paul Crozier, Douglas W. Doerfler, Harold C. Edwards, Wayne Gaudin, Timothy C Germann, Simon David Hammond, Andy Herdman, Stephen Jarvis, Paul Lin, Justin Luitjens, Andrew Mallinson, Simon McIntosh-Smith, Susan M Mniszewski, Jamaludin Mohd-Yusof, David F Richards, Christopher Sewell, Sriram Swaminarayan, Heidi K. Thornquist, Christian Robert Trott, Courtenay T. Vaughan, Alan B. Williams, Award, R&D 100 Award, R&D Magazine, Mantevo Suite 1.0, August 29, 2013.
2012	Hammond, Simon D, Review Board, Review Board, Second International Workshop on High-Performance Infrastructure for Scalable Tools (WHIST), October 1, 2011 – February 28, 2012.
2011	Hammond, Simon D, Arun F. Rodrigues, Society/Professional Leadership, Programme Committee and Workshop Steering Group, International Workshop in Performance Modeling, Simulation and Benchmarking of HPC Systems (held with SC11), May 1, 2011 – November 18, 2011. Hammond, Simon D, Review Board, Review Board (Upgrade and Conference Promotions Track), for Concurrency and Computation Practice and Experience Journal (CCPE), May 1, 2011. Hammond, Simon D, Review Board, Review Board for Journal Conference and Workshop Upgrade Track, The Computer Journal, May 1, 2011. Hammond, Simon D, Review Board, Review panel, GPU and Many-Core focused track., Journal of Parallel and Distributed Computing, June 1, 2011.