BFS vs. mainline scheduler benchmarks and measurements

I was referring to the same XKCD comic (http://xkcd.com/619/) that encouraged Con to do this, but no the scheduler plays a big role as well, with the greatest drivers and GPU you'd otherwise still end up with glitches in the sound and dropped frames in your video player.

I'd suggest two new benchmarks:
- One with basically an Ogg player playing music and a sound capture application that scans the stream for glitches and transfers the amount of glitches to some sort of benchmarking number,
- a benchmark that detects dropped frames and sound glitches when playing video's and transfers that to some sort of benchmarking result.

And all under some sort of heavy load (e.g. make kernel, cpuburn) Perhaps these tests are already available, but I could not find tests that are design to do this specifically under heavy load...