J. Gustafson
Reevaluating Amdahl's Law
Communications of the ACM, Volume 31, May 1988

This two-pager shook up the HPC community and took away the Amdahl defense against parallel processing. The paper was written in October 1987, and published in the Communications of the ACM in March 1988. This is also the paper that causes many to refer to the speedup model as the "Gustafson-Barsis law".

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