Cross-platform benchmarking suite needed

I’m looking for a cross-platform benchmarking suite. It must run natively (and by that I mean no emulation required, it will run on both operating systems without additional software or configuration) on Windows and Linux. The source-code should (if possible) be GPL, if not that’s ok too, I’ll deal with the situation. I want to test the same pieces of hardware under both operating systems for comparison. The things I?d like to compare are memory utilization, I/O performance, and general things like that. Ideally, I?d like the source-code to be GPL so that anyone who sees the results can?t cry foul (at least on my part.)

Any help you have is greatly appreciated.