xload shows 1/2 of the actual load

Hello,

"xload" shows that the load on my computer is 50% when in fact is 100%. I
know is 100% from "top".

Here is how I start xload:

> xload -update 2 -scale 5 -nolabel -bg black -fg white -hl cyan -geometry
50x30+1870+20 &

I have a dual core and "top" shows that both cores have a 100% load. I
have tow processes running, each taking 50% of the total processing
power (100% of a core each).

Thanks,
Rares Vernica