How do we know if the background tasks are performing well.

 

We can measure the Settling Time.

 

So here we see four cores beat ten cores to settling time. Simply because ten cores fills the bus and takes away compute power from the main tasks. In the graph we can see the settling time is sooner with four cores and also the average change in fps is also less:

 

Always try your sim without any Addins first and only if it runs smooth start adding Addins one by one. 
Then again check performance.

You will need to start from scratch if you cannot solve this. And do a good benchmark test before even installing your flightsim. Just to be sure there are no other issues.

Regarding  AM : I have done tests for weeks every time I tried a new cpu. P3D runs very well on 4 cores, also on 6 cores. Using 8 cores only helps with unusual setups like mine : two 4K displays connected to 1 pc and photo real scenery + custom AG only. Then the extra cores are helping with terrain loading.

With Steve’s help I am using the 8 strongest cores from my 14 core processor with an AM=1847. The other 6 cores are for Addon programs and they are also running at a slower frequency.

I do not use HT on because my 14 core processor then runs very hot.

With a 4 core processor I would.

Thanks G.

A bit more about that test result above. 18 core 9980Xe, twin 2080ti NVLinked (not sli), 4k 43" monitor @60Hz, heavy settings and AA.

The test harness (IFPro) runs on two cores other than the sim cores, this includes a stress testing SimConnect client moving 90 invisible objects a second, introduces 20 AI traffic, gradually spirals out full on complex weather to 300Nm, runs an x64 bridge, and a SAPI exe speaking out everything on the same two cores. If you can arrange that then you know what you are talking about.