Re: netbsd-5 i386 PAE dom0 + hvm domU winxp?

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Tue, Mar 23, 2010 at 09:42:38PM +0200, Jukka Marin wrote:
> On Tue, Mar 23, 2010 at 04:47:14PM +0100, Manuel Bouyer wrote:
> > On Tue, Mar 23, 2010 at 05:41:18PM +0200, Jukka Marin wrote:
> > > It's not swapping, no swap is in use.  It seems that a "busy-looping" 
> > > program
> > > affects the guests more than one that does lots of I/O.
> > 
> > strange, I've not noticed that. Does it affect all guests, or only
> > the HVM ones ?
> 
> After running a kernel build over 10 times in domU with and without dom0
> running bzip2, it seems there's no difference.  But the hvm guest (winxp)
> is real slow whenever bzip2 is running.

So it's qemu-dm being slowed down by bzip2. Maybe playing with renice would
help ?

> 
> > > No, envstat is the only one.
> > 
> > it's probably trying to grab a lock, but it may not be easy to find which
> > one.
> > If you can enter ddb, could you tr/t 0t<pid> this process ? 
> > You should be able to 'continue' after that, so the dom0 won't
> > reboot.
> 
> ddb doesn't work with the IPMI remote console system.  I'll try to check
> if the problem is reproducible on my test machine and see if I can hook
> up a keyboard and display..

Or you can probably change the magic key sequence to enter ddb
(sysctl hw.cnmagic)

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--