RE: [Xen-users] Getting Windows 2003 to run in multiple cores ???

[Antti Kanes <antti.kanes@xxxxxxxx>]

Hi,

Have you checked from your device manager that your windows is running  
the SMP HAL? It
might not be autodetected upon adding the second CPU if Windows was  
initially installed
with only one vcpu; If you'r system says 'ACPI Uniprocessor PC' in the  
device manager
(under Computer or something), try updating the driver (in which case the ACPI
Multiprocessor PC would be found) or removing the device and then  
rebooting (and again,
the smp hal should get autodetected).

I've noticed that hardware changes do often require shutdown / xm  
start (or even xm
create) to get applied, too.

Another problem with W2k3 that I came by was running network in bridge  
mode (as opposed
to NAT) in Xen 3.2-1; if vif was using ioemu, it would get added as  
tap0 (and tap1 and so
forth) and apparently as vif[domid].0 etc too, of which the tap was  
the working iface but
the scripts added only the non-working vif to brctl and the taps would  
have to be added
manually after startup.
This was addressed by using the GPL PV drivers, thankfully.


++antti

Quoting "Madhu Venugopal (vmadhu)" <vmadhu@xxxxxxxxx>:

> BTW, I noticed that when I use "xm new", the VCPUs are set as 4 as
> expected...
>
> [root@localhost images]# xm new -f win1.cfg
>
> [root@localhost images]# xm list
> Name                                        ID   Mem VCPUs      State
> Time(s)
> Domain-0                                     0  5503     1     r-----
> 4129.3
> win1                                            2048     4
> 0.0
>
> But as soon as I "xm start win1", the VCPUs go back to 1.
>
> [root@localhost images]# xm list
> Name                                        ID   Mem VCPUs      State
> Time(s)
> Domain-0                                     0  5503     1     r-----
> 4170.8
> win1                                        54  2048     1     r-----
> 4.5
>
> Thanks,
> -Madhu
>
> > -----Original Message-----
> > From: Madhu Venugopal (vmadhu)
> > Sent: Monday, August 03, 2009 11:45 PM
> > To: 'James Harper'; xen-users@xxxxxxxxxxxxxxxxxxx
> > Subject: RE: [Xen-users] Getting Windows 2003 to run in multiple cores
> > ???
> >
> > Hi James,
> >
> > Thanks for the response.
> > Unfortunately, "xm start" is not helping me either.
> >
> > Should I reboot dom0 to get this working ?
> > I would like to keep it the last option to try as am facing
> > other issues immediately after the dom0 reboot.
> >
> > Any other tricks to get multi-core working with Windows ?
> >
> > BTW, I could not find "xe" command in my XEN installation.
> > Even after installing the "xe-cli" rpm file, it is failing
> > Consistently with the error message :
> >
> > "Error: Connection refused (calling connect )"
> >
> > Thanks,
> > -Madhu
> >
> > > -----Original Message-----
> > > From: James Harper [mailto:james.harper@xxxxxxxxxxxxxxxx]
> > > Sent: Monday, August 03, 2009 4:40 PM
> > > To: Madhu Venugopal (vmadhu); xen-users@xxxxxxxxxxxxxxxxxxx
> > > Subject: RE: [Xen-users] Getting Windows 2003 to run in multiple
> > cores
> > > ???
> > >
> > > > Hi,
> > > >
> > > > Installed Windows 2003 on XEN successfully (domain name : win1).
> > > > I could not get it running in multiple cores though (tried
> > vcpus=4).
> > > > Windows taskmanager shows only 1 CPU always :-(.
> > > >
> > >
> > > This may not be your problem, but one thing that caught me out early
> > on
> > > is that if you make a change to the config file and then do a 'xm
> > > reboot' (or just do shutdown->restart in windows), the change isn't
> > > picked up - it runs with the old config. You need to shut down the
> > DomU
> > > and then 'xm start' it.
> > >
> > > Another thing, on the first startup after changing from vcpus=1 to
> > > vcpus=2 (or more), Windows needs to install the SMP HAL so it will
> > say
> > > something like "your hardware has changed and you need to reboot for
> > > the
> > > change to take effect".
> > >
> > > James
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users


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