pin hypervisor to physical cpu

pin hypervisor to physical cpu

[Xin Xu]

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Hi everyone,

I am trying to identify the current running task is belonging to domu, dom0
or hypervisor. So I figured if I can separate domu, dom0 and hypervisor to
different physical CPUs, then I can just look at cpu and then tell the task
belongs to which. I use xm vcpu-pin to pin domu and dom0, but it does not
work for hypervisor. I am just wondering if there is a way to pin
hypervisor to a specific cpu?

I am just trying to better understand how this "pinning" cpu works. If I
pin domu to cpu 0, does that mean all instructions belongs to domu will run
in cpu 0? Does that mean cpu 0 will be exclusively assigned to domu and
will not run any instructions from dom0 and hypervisor? I pin dom0 to cpu
0, and dom1 to cpu1, but i still see instructions running in cpu 2 and 3.
How can I tell what are those instructions in cpu 2 and 3?

Thank you

Xin Xu

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