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xen-devel
RE: [Xen-devel] Dom0 Hang for large VCPU counts > PCPU
________________________________________
On January 24, 2007 11:11 AM Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx] wrote
> On 24/1/07 6:56 pm, "Zulauf, John" <john.zulauf@xxxxxxxxx> wrote:
>
> > Using xen-3.0.4-testing with an HVM booting the FC6 DVD on a Core2 Duo
> > (i.e. 2 PCPU) on a 965 chipset
> >
> > VCPU=17 - works
> > VCPU=20 - works (takes a very long time)
> > VCPU=24 - lockup (whole machine, yes I mean Dom0)
> > VCPU=31 - same
> > VCPU=32 - same
>
> Have you worked out where it gets stuck? Do many-VCPU domU guests fare better?
It IS dying for a domU guests. Do you perhaps mean PV guests? No we haven't
tried them. I don't have any at the moment to test.
Clarifying the initial report:
Host is 2 core (Core 2 Duo/965 chipset) box with VPCU=PCPU for Dom0.
Issue occurs when attempting to start an HVM DomU with VCPU >= 24 (though we
haven't checked 21-23 yet).
The DomU never(apparently) starts, and Dom0 hard hangs. (i.e. not even the
numlock key works)
Given that Dom0 hangs hard when this occurs, we don't have any ideas as to the
exact cause of death.
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