FreeBSD 5.2.1 On SPARC64
JigSaw writes "FreeBSD has a solid reputation in terms of features and performance on x86, powering sites from Hotmail to Yahoo, yet it doesn't tend to be the first (or even second) OS that comes to mind with many people when thinking of Solaris alternatives for the SPARC platform. Tony Bourke tests FreeBSD 5.2.1 on his SPARC machine."
I put NetBSD on most of my Sparc hardware. Because then I can run and build from the same exact source tree of packages as I use on my Intel boxes. And run a kernel built from exactly the same source.
Which brings up a point: both NetBSD/Sparc and NetBSD/Sparc64 will run on an Ultra 1, which is a 64 bit machine. Why doesn't somebody install each NetBSD port on two seperate Ultra 1 machines. Then the benchmark comparision can be between the normal apps that build on both systems, running in parallel on two identical systems. Its exactly the same codebase except for the 32 or 64 bittedness.