Logic 9 Core Over Usage - How To Identify The Offending Process

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Hi I am using Logic 9. I have 8 cores and one is being severely overworked. Does anyone know how to identify what part of the project is causing the problem so that it can be addressed?

In the project I am using Shreddage 2, Shreddage Drums, Shreddage Bass (via Sforzando) and Kontakt Player 5 is running the Shreddage instruments. So I'm not sure where the problem lies, but I'm curious if I could get some leads on where to investigate.

In the project I have two instances of Kontakt. One has 2 instances of Shreddage 2 and the other has 2 instances of Shreddage 2 and Shreddage drums.

I'm using a lot of bussing and have no more than 3fx on any channel strip.

But for some reason my CPU Usage is almost pinned to the max. And I see that only 2 of my 8 cores is being used and 1 one of those 2 is doing 90% of the work. So basically 1 core is being over-utilized.

Has anyone experienced this? Most of the advice I see online indicates using busses to spread out FX but I'm pretty spread out already.

I also have an Aux audio track selected as I've read that having an instrument track selected can cause this issue.

I'm attaching a screen shot of my mixer. Any thoughts on how to isolate the issue would be appreciated, although I do realize the issue isn't necessarily with Shreddage. I'm just grasping at straws at this point.

And in Kontakt's options, I do have the multi-core support option enabled to 8 cores.

Does anyone know how to figure out what is causing the spike? Once I know that I can post about how to fix it. ;-)

Thanks.
Screen Shot 2016-01-20 at 10.07.55 PM.png
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