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Re: OT: dual-core or 64 bit?



On Wed, 2007-01-31 at 09:02 +0000, David Fletcher wrote:
> On Wednesday 31 January 2007 00:43, Rick Stevens wrote:
> >
> > Yes, they're out.  The "official" name for Pacifica is "AMD-V".  The
> > Athlon64/X2 series has AMD-V, as does the Opteron 1xxx,2xxx and 4xxx
> > series (e.g. Opteron 1210).
> >
> > If you "cat /proc/cpuinfo", look at the flags string.  AMD chips with
> > AMD-V will have the "svm" flag.  Intel chips will have the "vmx" flag.
> >
> > I have an AMD Athlon64/X2 and an Opteron 1210.  Here's the procinfo
> > for each.  First, the Athlon64/X2:
> >
> > [root labrat1 ~]# cat /proc/cpuinfo
> > flags           : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36
> > clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm
> > 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm cr8_legacy
> >
> > And now the Opteron 1210:
> >
> > flags           : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36
> > clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm
> > 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm cr8_legacy
> >
> 
> Thanks for that, Rick. Very interesting. I'll keep this thread when it's done 
> for future reference. Sure enough I just did "cat /proc/cpuinfo" on this P4 
> machine and there is no vmx flag.
> 
> But the question from both myself and Jonathan remains:- If I/he/we were to 
> build new systems using these processor chips, would we be able to get a Xen 
> kernel then install and run 98SE/XP/Vista as virtual machines?

I can't speak to Vista, but I've run 98, 98SE, XP, W2K server, W2K3SP2
server (that's Windows 2003 service pack 2) on both the 64/X2 and the
Opteron under Xen.  Works fine.

----------------------------------------------------------------------
- Rick Stevens, Senior Systems Engineer     rstevens vitalstream com -
- VitalStream, Inc.                       http://www.vitalstream.com -
-                                                                    -
-  BASIC is the Computer Science version of `Scientific Creationism' -
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