Preisträger*innen – UNIVIE Forschungspreise für Studierende 2025/2026

Robert Ernstbrunner

R. Ernstbrunner, W. Gansterer:  "Adaptive s-step GMRES with randomized and truncated low-synchronization orthogonalization"

Herzliche Gratulation zur Publikation, die am 39th IEEE International Parallel & Distributed Processing Symposium (IPDPS2025) als Full Paper akzeptiert wurde!

Abstract

Iterative solvers for large, sparse linear systems are widely used on powerful supercomputers. When solving very large problems, communication poses a significant bottleneck, which has prompted the development of communication-avoiding algorithms. We investigate how these algorithms can be combined with novel randomization strategies and introduce a new approach that achieves up to four times the performance of the current state-of-the-art on a modern supercomputer.

Portrait von Robert Ernstbrunner im Grünen.
© Robert Ernstbrunner