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Parallel Programming: Amdahl’s Law or Gustafson’s Law

June 29th, 2011 · No Comments




Aater Suleman discusses Gustafson’s law for parallel computing.

Lemma 1:
There exists workloads that are gaseous in nature: When provided with more compute power, they expand to consume the newly provided power.

Such programs are more common than you think.

1. BitCoin mining. If I give you more compute power, you will not finish sooner. Instead, you will just mine more coins.
2. Graphics. If I give you more compute power, you will just run your frames at a higher resolution or with more details.

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