Computational efficiency is calculated by dividing measured performance (Rmax) by peak performance (Rpeak).
For slayer, we can estimate peak performance by multiplying the number of nodes, cores per node, floating point units per core, and clock speed together. This gives:
Rpeak = 4 x 4 x 2 x 2.2 = 70.4Given our peak performance calculation, we have computational efficiency of:
effcomp = 55.76 / 70.4 = 0.7920 ~= 79%
Like the Microwulf we know how much we payed for our cluster computer and can calculate the price per performance (GFLOP). The cost of slayer was $1953.05 and has a measured performance of 55.76 GFLOPS, giving Slayer a price/performance ratio of $35.03/GFLOP (or less than $0.04/MFLOP)!