Symmetric multiprocessing, the ability to use two (or more, any even number will do) processors at once, was one of the many terms that gave BeOS its "buzzword enabled" status in 1995, with the launch of the BeBox. While it never really took off in consumer systems - the only major consumer manufacturer to sell SMP to the home market was AST, who provided BeOS on the system - is extremely popular with technically minded people, and very common in servers.

However, it was broken in Haiku, at least until today.

Axel Dörfler, Haiku's lead kernel developer, and currently sole paid developer, got it working, although his explanation of "not really sure what triggered this" leaves everything to the imagination :)

A screenshot was also provided for your voyeuristic pleasure.

Axel says on the blog posting that he still has more work to do to get it to work fully and properly, and that he doesn't expect it to work on modern SMP machines right now - his testing box is a dual Pentium III, according to the Pulse window in the screenshot.