Best Solaris 10 & SUSE Linux CPU Stress Testing SW

[randomkid]

What is the most recognized application that will stress test CPU under the Solaris 10 & SUSE Linux?

I did my search and I found that there are lots so I am banking on those who have actual experience in this regards!
Will appreciate the advice.

 

[randomkid]

I have suncheckup as stress testing for SUN servers. I wonder what it will be for the likes of IBM P6 550...