### Microwulf: Computational Efficiency

A computer's **computational efficiency**
is its measured performance (R_{Max})
divided by its peak performance (R_{Peak}):

compEff = R_{Max} / R_{Peak}

You can estimate a homogeneous cluster's peak performace as:
R_{Peak} = #nodes x #cores-per-node x floating-point-units-per-core x clock-speed

For Microwulf, this computes to:
R_{Peak} = 4 x 2 x 2 x 2.0 = 32.0

So Microwulf's computational efficiency is:
compEff = 26.25 / 32.0 = 0.8203 ~= **82%**

Generally, anything over 60 % efficiency is considered good,
so Microwulf's 82% computational efficiency is excellent.
For comparison, the computational efficiency of a 1996 Cray
T3D-256 was:

compEff = 25.3 / 33.4 = 0.6588 ~= **66%**

Joel Adams >
Research >
Microwulf >
Computational Efficiency