Solaris for real time
Many people think of Linux as real-time unix. Or about hard real time operating systems like vxworks. Not so many people know: The plain Solaris is a really capable real-time operating system, too. James Litchfield made some interesting latency tests to quantify the the RT capabilities of Solaris. And in the light of this results: It plays in the same ballpark as hard-RT operating systems with overall reaction times of 4 microseconds at average and 32 microseconds worst case.
(via: Marc Hamilton)