|Subject:||Re: [Qemu-discuss] High CPU in idle Windows guest|
|Date:||Tue, 12 May 2015 13:55:11 +0200|
|User-agent:||Mozilla/5.0 (Windows NT 6.3; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0|
(top posting to keep thread consistent)
Then you should remember to pass the qemu options to
start the VM as a XEN DomU, not as a software VM inside
your current (Dom0) VM.
I think (from reading qemu --help) that you may need
to do that via something called xend, there is probably
a manual somewhere.
On 10/05/2015 17:14, Terry Glanfield wrote:
Hi Dave, You do know that I'm running a Xen hypervisor and not KVM? I'm not wedded to Xen and would consider using KVM if it's more likely to solve my problem, but it would be good to get the Xen solution working properly. Regards, Terry. Dave Gosselin <address@hidden> writes:Hi Terry, It appears that the kernel driver hasn't been started. You can do this manually, before starting qemu, by running this as the root user: modprobe kvm You can confirm that the modprobe command started via the lsmod command: lsmod | grep -i kvm If you see any entries, it's loaded; if the command returns with nothing, then it did not load. Afterwards, you can run qemu but you may have to run it as root for it to take advantage of the KVM module you just started. Dave On 5/9/15 8:44 PM, Terry Glanfield wrote:Hi Dave, With -enable-kvm I get. Could not access KVM kernel module: No such file or directory failed to initialize KVM: No such file or directory Where to next? I'm willing to help diagnose it in whatever way I can. Regards, Terry. Dave Gosselin <address@hidden> writes:Try supplying the -enable-kvm option to your qemu arguments. If it doesn't work then the support may not be compiled in to qemu or the driver may not be loaded into the kernel. Let me know. Dave Gosselin Sent from my iPhoneOn May 9, 2015, at 18:52, Terry Glanfield <address@hidden> wrote: Hi, I'm running a freshly installed Windows 7 domU on an up-to-date Debian jessie machine running Xen 4.4.1-9. When the Windows machine is idle, I'm seeing upwards of 10% CPU usage from the qemu-system-i386 instance. Other Linux and FreeBSD machines register negligable CPU usage (<0.5%). The server is an HP Proliant DL360 G7. PV drivers don't seem to make any difference. Data from perf attacthed to the process might give the best clues. Any information as to why this processes is comsuming so much CPU would be much appreciated. Regards, Terry.
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