Xeon E5v3 All Core Turbo and Amdahl’s Law

Intel E5 v3 processors will run at “All Core Turbo” under load if properly cooled. This “clock” measurement is a better predictor of theoretical performance than base clock. We present a table of CPU performance at “all-core-turbo” using different parallel scaling factors from Amdhal’s Law. We have a dynamic graph that will show how much performance you lose when your parallel scaling is less than perfect. Just because your dual socket 16-core system shows all 32 cores at 100% doesn’t mean your problem is running 32 times faster!