On Wed, Dec 19, 2012 at 12:03:28PM +0800, Rozen Lin wrote: > Hi, All, > Currently when using kvm from qemu-kvm-1.1.0, I found sometimes after > doing the restart within the guest OS(winxp), the guest machine becomes > extremely slow and the computer info shows the CPU is 'QEMU virtual CPU' > and its frequency is rather low(nearly <350M Hz and changed after each > restart). > Then on this host the guest CPU will never return to normal Hz, even I > did a reinstall of qemu-kvm there, if I use '-cpu host' to force use the > host CPU, the VM crashed and got bluescreen, besides, the lsmod and > kvm-ok shows the kvm mod is all fine and usable and no warning/failure > in qemu-kvm running to indicate why the CPU is not same as host CPU. > As we know, normally, the Qemu CPU in Guest OS is of the same Hz as > the host machine CPU and the guest machine is running quickly when using > '-enable-kvm' in kvm cmdline. > Would you please share us that has anyone of you met this before, and > how to fix/resolve this? Thanks in advance! Please try QEMU 1.3 instead of qemu-kvm to see if the issue has been fixed since qemu-kvm-1.1.0. At the QEMU monitor you can use the "info kvm" command to verify that the KVM kernel module is being used. Stefan -- 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
