Re: qemu goes to 100%?
On Sat, 6 Apr 2019 12:27:01 -0400
Tom Horsley <horsley1953(a)gmail.com> wrote:
Here's a weird one I just noticed: I've been using a
Windows 10 virtual machine to run my tax software.
I've got it displayed in virt-viewer and all is
well, then I close the virt-viewer window and
leave the KVM running. About 5 minutes later I
see a cpu suddenly pegged at 100%. I run top and see
that qemu is the culprit. I start virt-viewer
again, and it goes back to normal.
Anyone else seen this? Why would nobody looking at
it make it go crazy I wonder?
In addition to all the serious possibilities that everyone else already
mentioned, you may also want to take a look at the trivial reasons ---
maybe the Windows screensaver is configured to activate after 5 min of
user inactivity, and starts draining the CPU by drawing 3D intensive
stuff on the virtual display (you know --- pipes, swimming fish,
whatever). Naturally, it turns itself off as soon as it detects
keyboard/mouse activity, i.e. when you start the virt-viewer again, and
you never even know it was there.
So you may want to take a look at all the screenlocking, screensaving,
power saving, etc... settings in Windows, and make sure all that stuff
(that doesn't make sense in a virtual machine environment), is turned
off and deactivated.
Just a thought. ;-)
Best, :-)
Marko