On 4/7/19 3:05 PM, Marko Vojinovic wrote:
On Sat, 6 Apr 2019 12:27:01 -0400
Tom Horsley <horsley1953@xxxxxxxxx> 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
Marko has a great point.
I had a customer whose network would go down five minutes after
I left, like clockwork. It turned out they were using a work
station as a file serve and had a 3D time lapse screen saver
of driving through Chicago. Put her on Blank screen saver
and it cured the issue. She was pissed at me, but everyone
else backed me, so ...
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