AWhat changed
Gustafson argued that parallel computing should also be evaluated with workloads that expand as processor counts grow, deriving scaled speedup and reporting near-linear results for three Sandia applications on a 1,024-processor system.
Scientific scope
Gustafson argued that parallel computing should also be evaluated with workloads that expand as processor counts grow, deriving scaled speedup and reporting near-linear results for three Sandia applications on a 1,024-processor system. Scaled speedup holds the chosen parallel execution workload/time viewpoint and serial fraction fixed. It complements rather than refutes fixed-workload Amdahl limits. Communication, memory, load balance and changing serial work remain costs. The reported machine experiments are particular cases, not a guarantee of linear speedup for arbitrary software.
Evidence
Source-linked, scoped account of the original work. The published scope states the scientific assumptions and remaining verification limits. WRS has not independently certified the full proof, experimental result or system benchmark.
Contributors
- John L. Gustafson · SCIENCE: Original source-listed scientific author of this scoped work; byline does not determine effort fractions.
- Gustafson, Reevaluating Amdahl’s Law(1988), university-hostedcomplete 3 pagereformattedreproduction
- Publisher-deposited Crossref JSON for 10.1145/42411.42415
Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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