Hi Jan and Paolo, I've tried to use preemption timer in KVM to trap vcpu regularly, but there's something unexpected. I run a VM with 4 vcpus and give them the same preemption timer value (e.g. 1000000) with all bits set (activate/save bits), then reset the value in preemption time-out handler. Thus I expected these vcpus trap regularly in some special turns. But I found that when the VM is not busy, some vcpus are trapped much less frequently than others. In Intel SDM, I noticed that preemption timer is only related to TSC, and I think all the vcpus should trap in a similar frequency. Could u help me explain this phenomenon? Thanks, Arthur -- Arthur Chunqi Li Department of Computer Science School of EECS Peking University Beijing, China -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
