macro benchmark for mutex locks needed.

[Stephan Uphoff]

I have a bunch of ideas to speed up spin and mutex locks somewhat.
For this I need benchmarks to test different modifications.

While the micro-benchmark from rwatson@ is a good way to quickly test
modifications to weed out unlikely candidates - jhb@ tests have shown
that micro and macro-benchmarks do not always show the same result.

Running benchmarks and booting takes a lot of time.
Since this is NOT one my favorite tasks I want to run generally accepted
benchmarks so I can test (boot) each modification exactly once for each
test machine.

If you think I should run certain benchmarks with certain parameters
please tell me BEFORE I start testing!

Thanks
	Stephan