Identifying Idle Threads/Cores / Advanced CPU pinning concepts

I was looking for this article i read the other day that went into detail about pinning cores inside KVM for increased performance but i can’t find it anywhere. The author in this context at least was speaking about a FX CPU stating “you should leave the 2 idle threads with the host and pin the other 6 to the guest”.

That is what i remember at least, does anyone remember this article/forum post? I believe it was made or cited here at least.