On Tue, Mar 31, 2009 at 02:19:09AM -0700, Andre Boegelsack wrote: > Now I'm interested in what the hypervisor is doing. Therefore I > executed hotkernel (from DTrace toolkit) in DomU and Dom0. I was > aliitle bit surprised to see that the operationg > "unix`HYPERVISOR_sched_op" consumed most CPU time in both DomU and > Dom0. Now I'm wondering what is the meaning of this operation?? Can > someone explain it or give me an idea what this operation is supposed > to do?
It does a number of things, but the reason you're seeing it a lot is because it's the idle callback. When a virtual CPU has no work to do, this hypercall is called. The hypervisor will then deschedule the VCPU from running on a real CPU until an interrupt arrives. So it looks like it's consuming CPU, but it's not. regards john _______________________________________________ dtrace-discuss mailing list dtrace-discuss@opensolaris.org
