Re: [Xen-users] qemu-system-i386 on 4.3.0

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Thu, Sep 05, 2013 at 03:31:47PM +0100, Ian Tobin wrote:
> Hi,
> 
> Interestingly the CPU usage is back to normal again after changing that 
> setting so thank you.
> 
> Does this mean there is a bug of some kind?
> 

There is difference between two device models. Probably Windows just
doesn't like things change under its feet.

To verify whether it is a bug I think you need to install Windows from
fresh with the newer device model and see if it still has very high CPU
utilization.

Wei.

> Thanks
> 
> Ian
> 
> 
>           
>  
> 
> 
> -----Original Message-----
> From: Wei Liu [mailto:wei.liu2@xxxxxxxxxx] 
> Sent: 05 September 2013 15:13
> To: Ian Tobin
> Cc: Wei Liu; xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] qemu-system-i386 on 4.3.0
> 
> On Thu, Sep 05, 2013 at 02:37:59PM +0100, Ian Tobin wrote:
> > Hi,
> > 
> > I tried setting
> > 
> > Device_model_override = 'qemu-dm'
> > 
> > As it wouldn't let me use device_model.
> > 
> > Its says device model override given without specific DM version and wont 
> > boot.
> > 
> 
> Use device_model_version = "qemu-xen-traditional".
> 
> Wei.
> 
> > Thanks
> > 
> > Ian
> > 
> > 
> >           
> >  
> > 
> > 
> > -----Original Message-----
> > From: Wei Liu [mailto:wei.liu2@xxxxxxxxxx] 
> > Sent: 05 September 2013 13:57
> > To: Ian Tobin
> > Cc: Wei Liu; xen-users@xxxxxxxxxxxxxxxxxxx
> > Subject: Re: [Xen-users] qemu-system-i386 on 4.3.0
> > 
> > On Thu, Sep 05, 2013 at 12:33:02PM +0100, Ian Tobin wrote:
> > > Hi,
> > > 
> > > All those things appear to be disabled anyway other than VNC which I 
> > > disabled and didn't make any difference
> > > 
> > > What would you suggest or do you have a config file I can test with?
> > > 
> > 
> > I don't run Windows.
> > 
> > Maybe you can try QEMU traditional?
> > 
> > Add device_model_version = "qemu-xen-traditional" in your config and see if 
> > it makes a difference.
> > 
> > Wei.
> > 
> > > Thanks
> > > 
> > > Ian
> > > 
> > > 
> > >           
> > >  
> > > 
> > > 
> > > -----Original Message-----
> > > From: Wei Liu [mailto:wei.liu2@xxxxxxxxxx]
> > > Sent: 04 September 2013 11:45
> > > To: Ian Tobin
> > > Cc: Wei Liu; xen-users@xxxxxxxxxxxxxxxxxxx
> > > Subject: Re: [Xen-users] qemu-system-i386 on 4.3.0
> > > 
> > > On Wed, Sep 04, 2013 at 09:08:30AM +0100, Ian Tobin wrote:
> > > > Hi,
> > > > 
> > > > Yes for example here is  the top output in Dom0 for 2 x HVM guests I 
> > > > have running
> > > > 
> > > > 24883 root      20   0 4092m 9012  832 S  41.6  2.0 441:49.18 
> > > > qemu-system-i38
> > > > 26023 root      20   0  268m  10m  812 S  37.0  2.5 236:45.22 
> > > > qemu-system-i38
> > > > 
> > > > They were never like this before.
> > > 
> > > OK. Looks like you've got lots of things running inside QEMU.
> > > 
> > > Could you try to disable different features in your config file (vnc, 
> > > opengl, emulated devices) to narrow down the problem?
> > > 
> > > Otherwise you might have to profile that process.
> > > 
> > > Wei.
> > > 
> > > > 
> > > > Attached configs
> > > > 
> > > > Thanks
> > > > 
> > > > Ian
> > > >           
> > > >  
> > > > 
> > > > 
> > > > -----Original Message-----
> > > > From: Wei Liu [mailto:wei.liu2@xxxxxxxxxx]
> > > > Sent: 04 September 2013 08:59
> > > > To: Ian Tobin
> > > > Cc: xen-users@xxxxxxxxxxxxxxxxxxx; wei.liu2@xxxxxxxxxx
> > > > Subject: Re: [Xen-users] qemu-system-i386 on 4.3.0
> > > > 
> > > > On Tue, Sep 03, 2013 at 09:23:01PM +0100, Ian Tobin wrote:
> > > > > Hi,
> > > > > 
> > > > >  
> > > > > 
> > > > > Since upgrading to 4.3.0 ive notice high cpu usage on this process 
> > > > > for each domU that is running.  Each process will runat 40-60% 
> > > > > usage.  Is there a way to stop it?
> > > > > 
> > > > 
> > > > What process? You mean QEMU process in Dom0? Can you provide your 
> > > > guest config file?
> > > > 
> > > > Wei.
> > > > 
> > > > >  
> > > > > 
> > > > > Thanks
> > > > > 
> > > > >  
> > > > > 
> > > > > Ian
> > > > > 
> > > > >  
> > > > > 
> > > > 
> > > > > _______________________________________________
> > > > > Xen-users mailing list
> > > > > Xen-users@xxxxxxxxxxxxx
> > > > > http://lists.xen.org/xen-users
> > > > 
> > > > 
> > > 
> > > 
> > > 
> > > 
> > 
> 

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