Mac CPU usage

I've been monitoring Filter Forge 6 beta on a MacBook Pro (Intel i7 processor, 4 cores, 8 threads) and have noticed that CPU usage according to the top utility run from the command line yields results that I don't completely understand.

Average CPU usage according to top:
Impressionist Curve - 160% - Bomber+ with image/arc tangent in loop for brush direction,
Impressionist Twist - 300% - Bomber+, relatively simple.
Spectral Mandelbrot 2 - 770% (not kidding) - LUA Script component filter.

These numbers are rough averages. BTW, 800% is the highest value top can return for this processor (8 threads per processor).

In general I found that most filters ran between 160% and 300% that did NOT contain a script component. What does this mean??

That's odd.
On my 4-core Windows computer, according to the task manager:
All four cores are running at 100% (I guess you would call that 400% ?) while Filter Forge is rendering. I don't mean that Filter Forge is using all of my CPU, I mean that Filter Forge + everything else = using all of my CPU. In other words, Filter Forge uses all available CPU that isn't being used by something else.

This has been true since FF 1 if I remember correctly, including on my previous computer, and hasn't changed with FF 6 Beta.

Thanks Rick Duim for making this tests of monitoring CPU on mac and that gives this bad results showing that FF 6 does not use all the cores of the CPU, which is very bad

How are you monitoring the CPU, what software are you using?

I think that if this true that does not recognize the additional cores, or is unable to use the full CPU is a very bad thing, at least on Mac