Venkatesh Srinivas performed the fefe.de ‘scalability’ benchmarks, which have been mentioned here before. He performed it on different hardware and only with DragonFly, so it’s not really for comparison but rather for analysis. However: graphs!
Matthew Dillon added some system tunables to match these microbenchmarks, and then changed the values. The benchmarks looked better, but according to him you wouldn’t want to run a system normally with those values.