Amdahl's and Gustafson-Barsis laws revisited
Distributed, Parallel, and Cluster Computing
2025-12-12 v1 Computer Science and Game Theory
Performance
Abstract
The paper presents a simple derivation of the Gustafson-Barsis law from the Amdahl's law. In the computer literature these two laws describing the speedup limits of parallel applications are derived separately. It is shown, that treating the time of the execution of the sequential part of the application as a constant, in few lines the Gustafson-Barsis law can be obtained from the Amdahl's law and that the popular claim, that Gustafson-Barsis law overthrows Amdahl's law is a mistake.
Cite
@article{arxiv.0809.1177,
title = {Amdahl's and Gustafson-Barsis laws revisited},
author = {Andrzej Karbowski},
journal= {arXiv preprint arXiv:0809.1177},
year = {2025}
}