Gustafson's Law Scaled Speedup Calculator

Calculate scaled speedup from Gustafson's Law: Speedup = N - S×(N-1), where N is processors and S is the serial fraction. Unlike Amdahl's, assumes problem scales with processor count.

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How It Works

Calculate scaled speedup from Gustafson's Law: Speedup = N - S×(N-1), where N is processors and S is the serial fraction. Unlike Amdahl's, assumes problem scales with processor count

Each component has a specific meaning:

  • Gustafson's Law: Speedup = N - S× — The gustafson's law: speedup = n - s× recorded for the scenario being assessed.
  • Where N is processors — The where n is processors recorded for the scenario being assessed.
  • S is the serial fraction — The s is the serial fraction recorded for the scenario being assessed.

Note: Interpret the gustafson's law result against the thresholds and context described above.

How to Use

Enter the Gustafson's Law: Speedup = N - S×, where N is processors, S is the serial fraction for the scenario you are assessing. Calculate scaled speedup from Gustafson's Law: Speedup = N - S×(N-1), where N is processors and S is the serial fraction. Unlike Amdahl's, assumes problem scales with processor count. Use the gustafson's law result to inform your calculation.

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