just curious, what are you trying to figure out with all this benchmarking? and why?
there may be other ways to determine the desired information. perhaps a theoretical calculation, as mentioned above.
as seen in the posts above, benchmarks are not always numbers its safe to bet on.
in the end, writing you own benchmarks is about the only sure way test exactly what you're interested in - unless someone else has already written one, and then you need access to the hardware.