Samuel Williams

Publication Activity (10 Years)

Years Active: 2001-2024
Publications (10 Years): 53

Top Topics

Scientific Computing

Parallel Processing

Top Venues

Concurr. Comput. Pract. Exp.

Publications

Nan Ding, Pieter Maris, Hai Ah Nam, Taylor L. Groves, Muaaz Gul Awan, LeAnn Lindsey, Christopher S. Daley, Oguz Selvitopi, Leonid Oliker, Nicholas J. Wright, Samuel Williams
Evaluating the potential of disaggregated memory systems for HPC applications. Concurr. Comput. Pract. Exp. 36 (19) (2024)
Mahesh Lakshminarasimhan, Mary W. Hall, Samuel Williams, Oscar Antepara
BrickDL: Graph-Level Optimizations for DNNs with Fine-Grained Data Blocking on GPUs. ICPP (2024)
Zhe Bai, Xishuo Wei, William Tang, Leonid Oliker, Zhihong Lin, Samuel Williams
FTL: Transfer Learning Nonlinear Plasma Dynamic Transitions in Low Dimensional Embeddings via Deep Neural Networks. CoRR (2024)
Xuan Jiang, Raja Sengupta, James Demmel, Samuel Williams
LPSim: Large Scale Multi-GPU Parallel Computing based Regional Scale Traffic Simulation Framework. CoRR (2024)
Nan Ding, Muhammad Haseeb, Taylor L. Groves, Samuel Williams
Evaluating the Performance of One-sided Communication on CPUs and GPUs. SC Workshops (2023)
Yang Liu, Nan Ding, Piyush Sao, Samuel Williams, Xiaoye Sherry Li
Unified Communication Optimization Strategies for Sparse Triangular Solver on CPU and GPU Clusters. SC (2023)
Oscar Antepara, Samuel Williams, Hans Johansen, Tuowen Zhao, Samantha Hirsch, Priya Goyal, Mary W. Hall
Performance Portability Evaluation of Blocked Stencil Computations on GPUs. SC Workshops (2023)
Oscar Antepara, Samuel Williams, Scott Kruger, Torrin Bechtel, Joseph McClenaghan, Lang Lao
Performance-Portable GPU Acceleration of the EFIT Tokamak Plasma Equilibrium Reconstruction Code. SC Workshops (2023)
Sridutt Bhalachandra, Brian Austin, Samuel Williams, Nicholas J. Wright
Understanding the Impact of Input Entropy on FPU, CPU, and GPU Power. CoRR (2022)
Tan Nguyen, Colin MacLean, Marco Siracusa, Douglas Doerfler, Nicholas J. Wright, Samuel Williams
FPGA-based HPC accelerators: An evaluation on performance and energy efficiency. Concurr. Comput. Pract. Exp. 34 (20) (2022)
Nan Ding, Muaaz G. Awan, Samuel Williams
Instruction Roofline: An insightful visual performance model for GPUs. Concurr. Comput. Pract. Exp. 34 (20) (2022)
Taylor Groves, Christopher S. Daley, Rahulkumar Gayatri, Hai Ah Nam, Nan Ding, Lenny Oliker, Nicholas J. Wright, Samuel Williams
A Methodology for Evaluating Tightly-integrated and Disaggregated Accelerated Architectures. PMBS@SC (2022)
Benjamin Sepanski, Tuowen Zhao, Hans Johansen, Samuel Williams
Maximizing Performance Through Memory Hierarchy-Driven Data Layout Transformations. MCHPC@SC (2022)
Marco Siracusa, Emanuele Del Sozzo, Marco Rabozzi, Lorenzo Di Tucci, Samuel Williams, Donatella Sciuto, Marco Domenico Santambrogio
A Comprehensive Methodology to Optimize FPGA Designs via the Roofline Model. IEEE Trans. Computers 71 (8) (2022)
Tuowen Zhao, Mary W. Hall, Hans Johansen, Samuel Williams
Improving communication by optimizing on-node data movement with data layout. PPoPP (2021)
Charlene Yang, Yunsong Wang, Thorsten Kurth, Steven Farrell, Samuel Williams
Hierarchical Roofline Performance Analysis for Deep Learning Applications. SAI (2) (2021)
Douglas Doerfler, Farzad Fatollahi-Fard, Colin MacLean, Tan Nguyen, Samuel Williams, Nicholas J. Wright, Marco Siracusa
Experiences Porting the SU3_Bench Microbenchmark to the Intel Arria 10 and Xilinx Alveo U280 FPGAs. IWOCL (2021)
Khaled Z. Ibrahim, Tan Nguyen, Hai Ah Nam, Wahid Bhimji, Steven Farrell, Leonid Oliker, Michael Rowan, Nicholas J. Wright, Samuel Williams
Architectural Requirements for Deep Learning Workloads in HPC Environments. PMBS (2021)
Wenjing Ma, Yulong Ao, Chao Yang, Samuel Williams
Solving a trillion unknowns per second with HPGMG on Sunway TaihuLight. Clust. Comput. 23 (2) (2020)
Tan Nguyen, Samuel Williams, Marco Siracusa, Colin MacLean, Douglas Doerfler, Nicholas J. Wright
The Performance and Energy Efficiency Potential of FPGAs in Scientific Computing. PMBS@SC (2020)
Jonathan R. Madsen, Muaaz G. Awan, Hugo Brunie, Jack Deslippe, Rahulkumar Gayatri, Leonid Oliker, Yunsong Wang, Charlene Yang, Samuel Williams
Timemory: Modular Performance Analysis for HPC. ISC (2020)
Christopher S. Daley, Hadia Ahmed, Samuel Williams, Nicholas J. Wright
A Case Study of Porting HPGMG from CUDA to OpenMP Target Offload. IWOMP (2020)
Anastasiia Butko, George Michelogiannakis, Samuel Williams, Costin Iancu, David Donofrio, John Shalf, Jonathan Carter, Irfan Siddiqi
Understanding Quantum Control Processor Capabilities and Limitations through Circuit Characterization. ICRC (2020)
Yunsong Wang, Charlene Yang, Steven Farrell, Yan Zhang, Thorsten Kurth, Samuel Williams
Time-Based Roofline for Deep Learning Performance Analysis. DLS@SC (2020)
Charlene Yang, Thorsten Kurth, Samuel Williams
Hierarchical Roofline analysis for GPUs: Accelerating performance optimization for the NERSC-9 Perlmutter system. Concurr. Comput. Pract. Exp. 32 (20) (2020)
Taylor Groves, Ben Brock, Yuxin Chen, Khaled Z. Ibrahim, Lenny Oliker, Nicholas J. Wright, Samuel Williams, Katherine A. Yelick
Performance Trade-offs in GPU Communication: A Study of Host and Device-initiated Approaches. PMBS@SC (2020)
Nan Ding, Samuel Williams
An Instruction Roofline Model for GPUs. PMBS@SC (2019)
Tuowen Zhao, Protonu Basu, Samuel Williams, Mary W. Hall, Hans Johansen
Exploiting reuse and vectorization in blocked stencil computations on CPUs and GPUs. SC (2019)
Khaled Z. Ibrahim, Samuel Williams, Leonid Oliker
Performance Analysis of GPU Programming Models Using the Roofline Scaling Trajectories. Bench (2019)
Bei Wang, Stéphane Ethier, William M. Tang, Khaled Z. Ibrahim, Kamesh Madduri, Samuel Williams, Leonid Oliker
Modern gyrokinetic particle-in-cell simulation of fusion plasmas on top supercomputers. Int. J. High Perform. Comput. Appl. 33 (1) (2019)
Tuowen Zhao, Mary W. Hall, Protonu Basu, Samuel Williams, Hans Johansen
SIMD code generation for stencils on brick decompositions. PPOPP (2018)
Tuomas Koskela, Zakhar Matveev, Charlene Yang, Adetokunbo Adedoyin, Roman Belenov, Philippe Thierry, Zhengji Zhao, Rahulkumar Gayatri, Hongzhang Shan, Leonid Oliker, Jack Deslippe, Ron Green, Samuel Williams
A Novel Multi-level Integrated Roofline Model Approach for Performance Characterization. ISC (2018)
Hongzhang Shan, Samuel Williams, Calvin W. Johnson
Improving MPI Reduction Performance for Manycore Architectures with OpenMP and Data Compression. PMBS@SC (2018)
Thorsten Kurth, William Arndt, Taylor Barnes, Brandon Cook, Jack Deslippe, Douglas Doerfler, Brian Friesen, Yun (Helen) He, Tuomas Koskela, Mathieu Lobet, Tareq M. Malas, Leonid Oliker, Andrey Ovsyannikov, Samuel Williams, Woo-Sun Yang, Zhengji Zhao
Analyzing Performance of Selected NESAP Applications on the Cori HPC System. ISC Workshops (2017)
Nicholas Chaimov, Khaled Z. Ibrahim, Samuel Williams, Costin Iancu
Reaching bandwidth saturation using transparent injection parallelization. Int. J. High Perform. Comput. Appl. 31 (5) (2017)
Brandon Cook, Thorsten Kurth, Brian Austin, Samuel Williams, Jack Deslippe
Performance Variability on Xeon Phi. ISC Workshops (2017)
Khaled Z. Ibrahim, Evgeny Epifanovsky, Samuel Williams, Anna I. Krylov
Cross-scale efficient tensor contractions for coupled cluster computations through multiple programming model backends. J. Parallel Distributed Comput. 106 (2017)
Protonu Basu, Samuel Williams, Brian van Straalen, Leonid Oliker, Phillip Colella, Mary W. Hall
Compiler-based code generation and autotuning for geometric multigrid on GPU-accelerated supercomputers. Parallel Comput. 64 (2017)
Hasan Metin Aktulga, Md. Afibuzzaman, Samuel Williams, Aydin Buluç, Meiyue Shao, Chao Yang, Esmond G. Ng, Pieter Maris, James P. Vary
A High Performance Block Eigensolver for Nuclear Configuration Interaction Calculations. IEEE Trans. Parallel Distributed Syst. 28 (6) (2017)
Philip C. Roth, Hongzhang Shan, David Riegner, Nikolas Antolin, Sarat Sreepathi, Leonid Oliker, Samuel Williams, Shirley Moore, Wolfgang Windl
Performance analysis and optimization of the RAMPAGE metal alloy potential generation software. SEPS@SPLASH (2017)
Ariful Azad, Grey Ballard, Aydin Buluç, James Demmel, Laura Grigori, Oded Schwartz, Sivan Toledo, Samuel Williams
Exploiting Multiple Levels of Parallelism in Sparse Matrix-Matrix Multiplication. SIAM J. Sci. Comput. 38 (6) (2016)
Douglas Doerfler, Jack Deslippe, Samuel Williams, Leonid Oliker, Brandon Cook, Thorsten Kurth, Mathieu Lobet, Tareq M. Malas, Jean-Luc Vay, Henri Vincenti
Applying the Roofline Performance Model to the Intel Xeon Phi Knights Landing Processor. ISC Workshops (2016)
Taylor Barnes, Brandon Cook, Jack Deslippe, Douglas Doerfler, Brian Friesen, Yun (Helen) He, Thorsten Kurth, Tuomas Koskela, Mathieu Lobet, Tareq M. Malas, Leonid Oliker, Andrey Ovsyannikov, Abhinav Sarje, Jean-Luc Vay, Henri Vincenti, Samuel Williams, Pierre Carrier, Nathan Wichmann, Marcus Wagner, Paul R. C. Kent, Christopher Kerr, John M. Dennis
Evaluating and Optimizing the NERSC Workload on Knights Landing. PMBS@SC (2016)
Zhaoyi Meng, Alice Koniges, Yun (Helen) He, Samuel Williams, Thorsten Kurth, Brandon Cook, Jack Deslippe, Andrea L. Bertozzi
OpenMP Parallelization and Optimization of Graph-Based Machine Learning Algorithms. IWOMP (2016)
Hongzhang Shan, Samuel Williams, Wibe de Jong, Leonid Oliker
Thread-level parallelization and optimization of NWChem for the Intel MIC architecture. PMAM@PPoPP (2015)
Ariful Azad, Grey Ballard, Aydin Buluç, James Demmel, Laura Grigori, Oded Schwartz, Sivan Toledo, Samuel Williams
Exploiting Multiple Levels of Parallelism in Sparse Matrix-Matrix Multiplication. CoRR (2015)
Abhinav Sarje, Sukhyun Song, Douglas Jacobsen, Kevin A. Huck, Jeffrey K. Hollingsworth, Allen D. Malony, Samuel Williams, Leonid Oliker
Parallel Performance Optimizations on Unstructured Mesh-based Simulations. ICCS (2015)
Nicholas Chaimov, Khaled Z. Ibrahim, Samuel Williams, Costin Iancu
Exploiting communication concurrency on high performance computing systems. PMAM@PPoPP (2015)
Hongzhang Shan, Samuel Williams, Calvin W. Johnson, Kenneth S. McElvain, W. Erich Ormand
Parallel implementation and performance optimization of the configuration-interaction method. SC (2015)
Alex Druinsky, Pieter Ghysels, Xiaoye S. Li, Osni Marques, Samuel Williams, Andrew T. Barker, Delyan Kalchev, Panayot S. Vassilevski
Comparative Performance Analysis of Coarse Solvers for Algebraic Multigrid on Multicore and Manycore Architectures. PPAM (1) (2015)
Adam Lugowski, Shoaib Kamil, Aydin Buluç, Samuel Williams, Erika Duriakova, Leonid Oliker, Armando Fox, John R. Gilbert
Parallel processing of filtered queries in attributed semantic graphs. J. Parallel Distributed Comput. (2015)
Didem Unat, Cy P. Chan, Weiqun Zhang, Samuel Williams, John Bachan, John B. Bell, John Shalf
ExaSAT: An exascale co-design tool for performance modeling. Int. J. High Perform. Comput. Appl. 29 (2) (2015)
Protonu Basu, Mary W. Hall, Samuel Williams, Brian van Straalen, Leonid Oliker, Phillip Colella
Compiler-Directed Transformation for Higher-Order Stencils. IPDPS (2015)
George Michelogiannakis, Alexander Williams, Samuel Williams, John Shalf
Collective memory transfers for multi-core chips. ICS (2014)
Hongzhang Shan, Amir Kamil, Samuel Williams, Yili Zheng, Katherine A. Yelick
Evaluation of PGAS Communication Paradigms with Geometric Multigrid. PGAS (2014)
Yu Jung Lo, Samuel Williams, Brian van Straalen, Terry J. Ligocki, Matthew J. Cordery, Nicholas J. Wright, Mary W. Hall, Leonid Oliker
Roofline Model Toolkit: A Practical Tool for Architectural and Program Analysis. PMBS@SC (2014)
Samuel Williams, Mike Lijewski, Ann S. Almgren, Brian van Straalen, Erin C. Carson, Nicholas Knight, James Demmel
s-Step Krylov Subspace Methods as Bottom Solvers for Geometric Multigrid. IPDPS (2014)
Hasan Metin Aktulga, Aydin Buluç, Samuel Williams, Chao Yang
Optimizing Sparse Matrix-Multiple Vectors Multiplication for Nuclear Configuration Interaction Calculations. IPDPS (2014)
Khaled Z. Ibrahim, Kamesh Madduri, Samuel Williams, Bei Wang, Stéphane Ethier, Leonid Oliker
Analysis and optimization of gyrokinetic toroidal simulations on homogenous and heterogenous platforms. Int. J. High Perform. Comput. Appl. 27 (4) (2013)
Christopher D. Krieger, Michelle Mills Strout, Catherine Olschanowsky, Andrew Stone, Stephen M. Guzik, Xinfeng Gao, Carlo Bertolli, Paul H. J. Kelly, Gihan R. Mudalige, Brian van Straalen, Samuel Williams
Loop Chaining: A Programming Abstraction for Balancing Locality and Parallelism. IPDPS Workshops (2013)
Aydin Buluç, Erika Duriakova, Armando Fox, John R. Gilbert, Shoaib Kamil, Adam Lugowski, Leonid Oliker, Samuel Williams
High-Productivity and High-Performance Analysis of Filtered Semantic Graphs. IPDPS (2013)
Bei Wang, Stéphane Ethier, William M. Tang, Timothy J. Williams, Khaled Z. Ibrahim, Kamesh Madduri, Samuel Williams, Leonid Oliker
Kinetic turbulence simulations at extreme scale on leadership-class systems. SC (2013)
Protonu Basu, Anand Venkat, Mary W. Hall, Samuel Williams, Brian van Straalen, Leonid Oliker
Compiler generation and autotuning of communication-avoiding operators for geometric multigrid. HiPC (2013)
Aydin Buluç, Armando Fox, John R. Gilbert, Shoaib Kamil, Adam Lugowski, Leonid Oliker, Samuel Williams
High-performance analysis of filtered semantic graphs. PACT (2012)
Samuel Williams, Dhiraj D. Kalamkar, Amik Singh, Anand M. Deshpande, Brian van Straalen, Mikhail Smelyanskiy, Ann S. Almgren, Pradeep Dubey, John Shalf, Leonid Oliker
Optimization of geometric multigrid for emerging multi- and manycore processors. SC (2012)
Kamesh Madduri, Jimmy Su, Samuel Williams, Leonid Oliker, Stéphane Ethier, Katherine A. Yelick
Optimization of Parallel Particle-to-Grid Interpolation on Leading Multicore Platforms. IEEE Trans. Parallel Distributed Syst. 23 (10) (2012)
Samuel Williams, Leonid Oliker, Jonathan Carter, John Shalf
Extracting ultra-scale Lattice Boltzmann performance via hierarchical and distributed auto-tuning. SC (2011)
Aydin Buluç, Samuel Williams, Leonid Oliker, James Demmel
Reduced-Bandwidth Multithreaded Algorithms for Sparse Matrix-Vector Multiplication. IPDPS (2011)
Kamesh Madduri, Eun-Jin Im, Khaled Z. Ibrahim, Samuel Williams, Stéphane Ethier, Leonid Oliker
Gyrokinetic particle-in-cell optimization on emerging multi- and manycore platforms. Parallel Comput. 37 (9) (2011)
Kamesh Madduri, Khaled Z. Ibrahim, Samuel Williams, Eun-Jin Im, Stéphane Ethier, John Shalf, Leonid Oliker
Gyrokinetic toroidal simulations on leading multi- and manycore HPC systems. SC (2011)
Jens Krueger, David Donofrio, John Shalf, Marghoob Mohiyuddin, Samuel Williams, Leonid Oliker, Franz-Josef Pfreundt
Hardware/software co-design for energy-efficient seismic modeling. SC (2011)
Aparna Chandramowlishwaran, Samuel Williams, Leonid Oliker, Ilya Lashuk, George Biros, Richard W. Vuduc
Optimizing and tuning the fast multipole method for state-of-the-art multicore architectures. IPDPS (2010)
Shoaib Kamil, Cy P. Chan, Leonid Oliker, John Shalf, Samuel Williams
An auto-tuning framework for parallel multicore stencil computations. IPDPS (2010)
Kaushik Datta, Shoaib Kamil, Samuel Williams, Leonid Oliker, John Shalf, Katherine A. Yelick
Optimization and Performance Modeling of Stencil Computations on Modern Microprocessors. SIAM Rev. 51 (1) (2009)
Kamesh Madduri, Samuel Williams, Stéphane Ethier, Leonid Oliker, John Shalf, Erich Strohmaier, Katherine A. Yelick
Memory-efficient optimization of Gyrokinetic particle-to-grid interpolation for multicore processors. SC (2009)
Samuel Williams, Andrew Waterman, David A. Patterson
Roofline: an insightful visual performance model for multicore architectures. Commun. ACM 52 (4) (2009)
Samuel Williams, Leonid Oliker, Richard W. Vuduc, John Shalf, Katherine A. Yelick, James Demmel
Optimization of sparse matrix-vector multiplication on emerging multicore platforms. Parallel Comput. 35 (3) (2009)
Marghoob Mohiyuddin, Mark Murphy, Leonid Oliker, John Shalf, John Wawrzynek, Samuel Williams
A design methodology for domain-optimized power-efficient supercomputing. SC (2009)
Samuel Williams, Jonathan Carter, Leonid Oliker, John Shalf, Katherine A. Yelick
Optimization of a lattice Boltzmann computation on state-of-the-art multicore platforms. J. Parallel Distributed Comput. 69 (9) (2009)
Joseph Gebis, Leonid Oliker, John Shalf, Samuel Williams, Katherine A. Yelick
Improving Memory Subsystem Performance Using ViVA: Virtual Vector Architecture. ARCS (2009)
Samuel Williams, Jonathan Carter, Leonid Oliker, John Shalf, Katherine A. Yelick
Lattice Boltzmann simulation optimization on leading multicore platforms. IPDPS (2008)
Kaushik Datta, Mark Murphy, Vasily Volkov, Samuel Williams, Jonathan Carter, Leonid Oliker, David A. Patterson, John Shalf, Katherine A. Yelick
Stencil computation optimization and auto-tuning on state-of-the-art multicore architectures. SC (2008)
Samuel Williams, Leonid Oliker, Richard W. Vuduc, John Shalf, Katherine A. Yelick, James Demmel
Optimization of sparse matrix-vector multiplication on emerging multicore platforms. SC (2007)
Samuel Williams, John Shalf, Leonid Oliker, Shoaib Kamil, Parry Husbands, Katherine A. Yelick
Scientific Computing Kernels on the Cell Processor. Int. J. Parallel Program. 35 (3) (2007)
Shoaib Kamil, Kaushik Datta, Samuel Williams, Leonid Oliker, John Shalf, Katherine A. Yelick
Implicit and explicit optimizations for stencil computations. Memory System Performance and Correctness (2006)
Samuel Williams, John Shalf, Leonid Oliker, Shoaib Kamil, Parry Husbands, Katherine A. Yelick
The potential of the cell processor for scientific computing. Conf. Computing Frontiers (2006)
Christoforos E. Kozyrakis, David Judd, Joseph Gebis, Samuel Williams, David A. Patterson, Katherine A. Yelick
Hardware/compiler codevelopment for an embedded media processor. Proc. IEEE 89 (11) (2001)