Correctness 2021: Fifth International Workshop on Software Correctness for HPC Applications

November 19, 2021 (half day, 8:30am - 12pm CST)

America’s Center Convention Complex

St. Louis, MO, USA

Held in conjunction with SC21: The International Conference for High Performance Computing, Networking, Storage and Analysis
In cooperation with

Ensuring correctness in high-performance computing (HPC) applications is one of the fundamental challenges that the HPC community faces today. While significant advances in verification, testing, and debugging have been made to isolate software errors (or defects) in the context of non-HPC software, several factors make achieving correctness in HPC applications and systems much more challenging than in general systems software—growing heterogeneity (architectures with CPUs, GPUs, and special purpose accelerators), massive scale computations (very high degree of concurrency), use of combined parallel programing models (e.g., MPI+X), new scalable numerical algorithms (e.g., to leverage reduced precision in floating-point arithmetic), and aggressive compiler optimizations/transformations are some of the challenges that make correctness harder in HPC. The following report lays out the key challenges and research areas of HPC correctness: DOE Report of the HPC Correctness Summit.

As the complexity of future architectures, algorithms, and applications in HPC increases, the ability to fully exploit exascale systems will be limited without correctness. With the continuous use of HPC software to advance scientific and technological capabilities, novel techniques and practical tools for software correctness in HPC are invaluable.

The goal of the Correctness Workshop is to bring together researchers and developers to present and discuss novel ideas to address the problem of correctness in HPC. The workshop will feature contributed papers and invited talks in this area.

Workshop Topics

Topics of interest include, but are not limited to:

Correctness in Scientific Applications and Algorithms

Tools for Debugging, Testing, and Correctness Checking

Programing Models and Runtime Systems Correctness

Other Areas

Submissions and Format

Authors are invited to submit manuscripts in English structured as technical or experience papers at a length of at least 6 pages but not exceeding 8 pages of content, including everything. Submissions must use the IEEE format.

Submitted papers will be peer-reviewed by the Program Committee and accepted papers will be published by IEEE Xplore via TCHPC.

Submitted papers must represent original unpublished research that is not currently under review for any other venue. Papers not following these guidelines will be rejected without review. Submissions received after the due date, exceeding length limit, or not appropriately structured may also not be considered. At least one author of an accepted paper must register for and attend the workshop. Authors may contact the workshop organizers for more information. Papers should be submitted electronically at: https://submissions.supercomputing.org/.

SC Reproducibility Initiative

We encourage authors to submit an optional artifact description (AD) appendix along with their paper, describing the details of their software environments and computational experiments to the extent that an independent person could replicate their results. The AD appendix is not included in the 8-page limit of the paper and should not exceed 2 pages of content. For more details of the SC Reproducibility Initiative please see: https://sc19.qltdclient.com/submit/reproducibility-initiative/.


The proceedings will be archived in IEEE Xplore via TCHPC.

Important Dates

Due to several requests, we have extended the submission deadline to Aug/16/21.

All time zones are AOE.

Workshop Date


Ignacio Laguna, LLNL
Cindy Rubio-González, UC Davis

Program Committee

Alper Altuntas, National Center for Atmospheric Research, USA
Allison H. Baker, National Center for Atmospheric Research, USA
John Baugh, North Carolina State University, USA
Hugo Brunie, INRIA, France
Patrick Carribault, CEA-DAM, France
Charisee Chiw, Galois, Inc, USA
Ganesh Gopalakrishnan, University of Utah, USA
Geoffrey C. Hulette, Sandia National Laboratories, USA
Michael O. Lam, James Madison University, USA
Jackson Mayo, Sandia National Laboratories, USA
Boyana Norris, University of Oregon, USA
Joachim Protze, RWTH Aachen University, Germany
Tristan Ravitch, Galois, Inc, USA
Emmanuelle Saillard, INRIA Bordeaux, France
Markus Schordan, Lawrence Livermore National Laboratory, USA
Tristan Vanderbruggen, Lawrence Livermore National Laboratory, USA



Session 1
8:30am - 8:40pm: Opening remarks
8:40am - 9:00am: Invited Paper 1: "Finding Large Poisson Polynomials Using Four-Level Variable Precision", David H. Bailey
9:00am - 9:20am: Paper 1: "Guarding Numerics Amidst Rising Heterogeneity", Ganesh Gopalakrishnan, Ignacio Laguna, Ang Li, Pavel Panchekha, Cindy Rubio-González, Zachary Tatlock
9:20am - 9:40am: Paper 2: "The MPI BUGS INITIATIVE: a Framework for MPI Verification Tools Evaluation", Mathieu Laurent, Emmanuelle Saillard, Martin Quinson
9:40am - 10:00am: Invited Paper 2: "OpenRace: An Open Source Framework for Statically Detecting Data Races", Bradley Swain, Jeff Huang, Bozhen Liu, Peiming Liu, Yanze Li, Addison Crump, Rohan Khera
10:00am - 10:30am: Break
Session 2
10:30am - 10:50am: Paper 3: "Performance of Dynamic Data Race Detection", Joachim Protze, Isabel Thärigen, Jonas Wahle
10:50am - 11:10am: Paper 4: "High-Precision Evaluation of Both Static and Dynamic Tools using DataRaceBench", Pei-Hung Lin, Chunhua Liao
11:10am - 12:00pm: Plenary Session: "Building a Bug Hunting Competition for HPC Correctness", Cindy Rubio-González (UC Davis), Martin Quinson (ENS Rennes), Chunhua Liao (LLNL), Joachim Protze (RWTH Aachen University), Markus Schordan (LLNL)

Building a Bug Hunting Competition for HPC Correctness

Why the competition? The goal of the competition is to stimulate the development of correctness tools and the improvement of existing ones in the domain of HPC. As HPC applications become more complex and heterogeneous, we would like to discuss as a community: (1) potential benchmark suites for correctness tools, (2) metrics and criteria for comparing tools, (3) databases of bug reports and/or reproducible test cases, (4) defining the competition rules, and (5) important classes of bugs or correctness issues to address. The section 5.4 of the DOE Report of the HPC Correctness Summit highlights some of the benefits for such competitions: https://www.osti.gov/biblio/1470989.

Contact Information

Please address workshop questions to Ignacio Laguna (ilaguna@llnl.gov) and/or Cindy Rubio-González (crubio@ucdavis.edu).

Previous Workshops