[Xen-devel] pin hypervisor to physical cpu

[Xin Xu <jungle.xuxin@xxxxxxxxx>]

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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