How does the "top" script in the *Nix TA work for Dual CPUs and Multiple Cores?

Hello, I'm running the Splunk App for *nix, the TA and SA and the question I have is when you use the index=os sourcetype=top|stats avg(pctCPU)... I have an IBM HS23 - dual CPU with 6 Core each. Does 100% signify one CPU as being pegged at 100%, or 2 CPUs at 25/75% or maybe 50/50% or both CPU's maxed out? Thanks in advance.