| 摘要 |
Methods and apparatus involve monitoring spin locks for guest devices. Fully virtualized guests have multiple virtual processors configured under the scheduling control of a hypervisor on a physical hardware platform. The hypervisor posts On CPU and CR3 load information to shared communications pages for each of the processors. A monitoring module in the guest device monitors the pages to ascertain forward progress of the processors. If forward progress is being made, the virtual processors continue to spin. If not, the CPU's control is variously relinquished. The monitoring module typifies a kernel driver so that the guest can maintain an unmodified operating system. Ticket spin locks, and their ordering, are also considered as are computations for lock owners. Other features contemplate computing systems and computer program products, to name a few.
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