When I check xentop in dom0, I see dom0 takes constantly above 15% of the CPU. BUT in the same time my qui-domains is open and it shows no more than 1-3%…
Is this expected??? if yes, can you please explain?
I believe it’s because of interaction between Xen, dom0, and DomUs.
Some of the virtual hardware is provided by dom0, and it carries the resource cost.
I am not sure why you can’t see it inside dom0, it could be a difference in how the value is shown. In xentop each core attached to dom0 is 100%, if you have 10 cores then 15% in xentop could be 1.5% in the XFCE Tasks GUI.
If you stop all domUs, the CPU load on dom0 should also drop.
2 Likes
That makes sense… thanks!