A computer's computational efficiency is its measured performance (RMax) divided by its peak performance (RPeak):
compEff = RMax / RPeakYou can estimate a homogeneous cluster's peak performace as:
RPeak = #nodes x #cores-per-node x floating-point-units-per-core x clock-speedFor Microwulf, this computes to:
RPeak = 4 x 2 x 2 x 2.0 = 32.0So 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