> Subject: RE: [Xen-devel] A simple question of CPU emulation in Xen > From: Ian.Campbell@xxxxxxxxxx > To: james.harper@xxxxxxxxxxxxxxxx > CC: tinnycloud@xxxxxxxxxxx; xen-devel@xxxxxxxxxxxxxxxxxxx > Date: Mon, 16 May 2011 09:04:15 +0100 > > > > > Could i have the configuration u refer to? In hvm file? > > > I did something like this to give my DomU the lowest common feature > > set between my AMD and Intel based servers for live migration: > > > > cpuid = [ '0:eax=0x3,ebx=0x0,ecx=0x0,edx=0x0', > > '1:eax=0x06b1,ecx=xxxxxxxxxxx0000xx00xxx0000000xx0,edx=xxx00000xxxxxxx0xxxxxxxxx0xxxxxx', > > '4:eax=0x3,ebx=0x0,ecx=0x0,edx=0x0', > > '0x80000000:eax=0x3,ebx=0x0,ecx=0x0,edx=0x0'] > > > > In addition to this xend syntax xl in 4.1 and later supports a more > friendly syntax, described in the commit message for 22217:27c01a2e2a47. > > Ian. >
Thanks Ian.
Will these impact domU performance behavior if I give a diffrernet CPU type and othere configurations(such as frequency, doubt this is supported)?
> > But I haven't tried it in a while so I can't tell if it still works as > > it should. I do know that Silverlight won't install with the above > > because it requires some feature that I've masked out. > > > > There are some other examples in the example configs I think. > >
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