Thanks for the code, when I ran it I got this:
2.6.9/Xeon/3.2 MHz
(3 runs)
129186.76 semop/s (8784700/68) [100]
129367.65 semop/s (8797000/68) [100]
129257.35 semop/s (8789500/68) [100]

SCO/Xeon/3.2 MHz
(3 runs)
527641.18 semop/s (8969900/17) [100]
564212.50 semop/s (9027400/16) [100]
535800.00 semop/s (9108600/17) [100]

I see SCO is capable of doing roughly 3 times more semop/s than Linux.

BTW, the h/w is identical, I believe I have it posted in this looong thread.

For Linux, I will re-post here s/w versions:
Fedora 2.6.9
gcc - ver.3.4.3
ldd - ver. 2.3.5
glibc - ver 2.3.5