Anybody else notice this - when using my Studio set up (see sig) the CPU portion of the performance module often indicates no activity (no bars shown) but sometimes it does.  This variation will happen when the transport is playing i.e. there will be "normal" activity and then all of a sudden, there is no activity.
 
On a similar project on my mobile system (see sig) there is lots of activity.
 
Is this a known issue - i only noticed it since upgrading to Newberryport (skipped several updates on my studio system)?

Its normal. It depends on what is going on in your project. What FX is being used. Also some VST3 FX may cut off while not being used causing a drop in the performance module. 
 
All sorts of things can impact what it shows. 

But it doesn't show anything.  There always used to be at least a little blip on the first core.  And when it does show, there is activity on all cores.
 
This happens when the project is playing as well as when it is not.

Than I would say rejoice that you have a fast system. I have seen that on occasion.  Little or no activity on the performance module is not that unusual.  

Not buying it.  When the transport is playing, there will be "normal" activity, (e.g. core 1 at about 30% the other 3 at about 10%) and then all of a sudden, there will be nothing showing.

 
My module always shows activity on all 'cores', but I'm on Manchester.  On a project like the Sonar demo songs there is little difference in levels whether the song is playing or not.  That you see no activity at all doesn't seem right.
 
Speaking of this module, I've noticed that while it will often/always show quite a bit more load on the core 1 (0?), the Windows Task Manager does not - all cores there are about equal.  For example, running AD2 in Sonar will bring core 1 up to 50%, way above the others, but in Windows it shows no higher, or even lower than the others.  So maybe the complaints regarding AD2 were misplaced ?

dwardzala
Not buying it.  When the transport is playing, there will be "normal" activity, (e.g. core 1 at about 30% the other 3 at about 10%) and then all of a sudden, there will be nothing showing.

I guess I misunderstood. That does seem odd. 

Yeah, I probably wasn't clear in my original post.

I saw this happen just once a once a couple weeks ago. At the time I thought it had more to do with my new machine and O/S, but that move coincided with the release of Nooberyport so it could be peculiar to this release. I certainly never saw it any previous release on the old machine.

If you don't have performance problems I'd suggest removing that module from the control bar. No point getting fixated on something that isn't really a problem. If you feel really strong about it I suggest contacting tech support. Anything you get here will be speculation at best.