[vbox-dev] 100% cpu use of vm on latest svn 23759

Huihong Luo huisinro at yahoo.com
Sat Oct 24 18:40:52 GMT 2009

for the 2 vms that consume 100% cpu, I tested them with an old build (svn #r22444), works very well, with very low cpu use.
not sure what has changed so much? if need more info, I can test more builds, and find out the cause. If you have some ideas or guesses, pls share.
The guest are 32-bit XP and Win7, on 64-bit windows 7. Same results when tested on 32-bit hosts. Changing options such as ioapic, VT-x, does not make diff. The latest build uses 100% cpu, the old build works just fine.

--- On Sun, 10/18/09, Stéphane Charette <stephanecharette at gmail.com> wrote:

From: Stéphane Charette <stephanecharette at gmail.com>
Subject: Re: [vbox-dev] 100% cpu use of vm on latest svn 23759
To: "Huihong Luo" <huisinro at yahoo.com>
Cc: vbox-dev at virtualbox.org
Date: Sunday, October 18, 2009, 8:49 PM

On Sun, Oct 18, 2009 at 14:03, Huihong Luo <huisinro at yahoo.com> wrote:
> some VMs always run on 100% cpu. this was not the case before

If someone knows what the deal is with this, I've been ripping my hair
out for the last few versions of VirualBox.  There is some discussion
about this at:  http://forums.virtualbox.org/viewtopic.php?f=1&t=22750

Truth is, I'm starting to wonder if this is a hardware problem on my
end...but then people like yourself and others in that forum thread
are reporting the same issue.  I don't know what to think.

>From a development point of view, is there some way to get additional
logging as to what VB is doing when the guest is (supposedly) sitting
there idle?  Would be nice to know where the tight loop is happening.
I see absolutely night in my machine log while it sits there consuming
100% of the cpu.

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