So I just noticed -ck attached to a bitcoin client and low, behold, it’s the same Con Kolivas who used to maintain the -ck Linux scheduler. Check out the CGminer bitcoin number crunching client if you’re interested.
Con’s done some outstanding work in scheduler development on the Linux kernel. He’s always backed up his claims with actual graphs and numbers unlike so many (not specifically Linux) developers who take a “well it should work” attitude. It’s interesting to see all that applied math going into tweaking a number cruncher.