Re: [libvirt-users] 'virsh capabilities' on Debian Wheezy-amd64 reports different cpu to Wheezy-i386 (on same hardware)

On Fri, Feb 28, 2014 at 03:45:01PM +0000, Struan Bartlett wrote: > Hi > > On a range of Dell servers containing Intel 64bit processors, 'virsh > capabilities' reports the cpu differently on Debian Wheezy-amd64 and > Wheezy-i386. The results given by the Wheezy-i386 version seem very > wrong (since n270 is an Atom processor). Apart from architecture, the > package versions of libvirt-bin are identical: 1.2.1-1~bpo70+1. > /usr/share/libvirt/cpu_map.xml files are identical. Is this a known > issue? Details for one server are: > > # cat /proc/cpuinfo| head -n 26 > processor : 0 > vendor_id : GenuineIntel > cpu family : 6 > model : 45 > model name : Intel(R) Xeon(R) CPU E5-2650L 0 @ 1.80GHz > stepping : 7 > microcode : 0x70d > cpu MHz : 1800.054 > cache size : 20480 KB > physical id : 0 > siblings : 16 > core id : 0 > cpu cores : 8 > apicid : 0 > initial apicid : 0 > fpu : yes > fpu_exception : yes > cpuid level : 13 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge > mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe > syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good > nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 > monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 > sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat > xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid > bogomips : 3600.10 > clflush size : 64 > cache_alignment : 64 > address sizes : 46 bits physical, 48 bits virtual > power management: > > ... > </proc/cpuinfo for processors 1..31 snipped here for brevity> > Check if all 32 CPUs have *exactly* the same flags, I remember an issue when we reported a wrong cpu because the probing code was scheduled on one of them which had one flag missing. If package and cpu_map.xml are the same, this is the only thing I can think of. Simple 'grep ^flags /proc/cpuinfo | sort -u' should do. If only one line is printed out than I don't know where the problem might be... Martin > # Running Wheezy-amd64 libvirt-bin1.2.1-1~bpo70+1 > # virsh capabilities > > <cpu> > <arch>x86_64</arch> > <model>SandyBridge</model> > <vendor>Intel</vendor> > <topology sockets='2' cores='8' threads='2'/> > <feature name='pdpe1gb'/> > <feature name='osxsave'/> > <feature name='dca'/> > <feature name='pcid'/> > <feature name='pdcm'/> > <feature name='xtpr'/> > <feature name='tm2'/> > <feature name='est'/> > <feature name='smx'/> > <feature name='vmx'/> > <feature name='ds_cpl'/> > <feature name='monitor'/> > <feature name='dtes64'/> > <feature name='pbe'/> > <feature name='tm'/> > <feature name='ht'/> > <feature name='ss'/> > <feature name='acpi'/> > <feature name='ds'/> > <feature name='vme'/> > </cpu> > > > # Running Wheezy-i386 libvirt-bin1.2.1-1~bpo70+1 > # virsh capabilities > > <cpu> > <arch>x86_64</arch> > <model>n270</model> > <vendor>Intel</vendor> > <topology sockets='2' cores='8' threads='2'/> > <feature name='lahf_lm'/> > <feature name='lm'/> > <feature name='rdtscp'/> > <feature name='pdpe1gb'/> > <feature name='avx'/> > <feature name='osxsave'/> > <feature name='xsave'/> > <feature name='aes'/> > <feature name='tsc-deadline'/> > <feature name='popcnt'/> > <feature name='x2apic'/> > <feature name='sse4.2'/> > <feature name='sse4.1'/> > <feature name='dca'/> > <feature name='pcid'/> > <feature name='pdcm'/> > <feature name='xtpr'/> > <feature name='cx16'/> > <feature name='tm2'/> > <feature name='est'/> > <feature name='smx'/> > <feature name='vmx'/> > <feature name='ds_cpl'/> > <feature name='dtes64'/> > <feature name='pclmuldq'/> > <feature name='pbe'/> > <feature name='tm'/> > <feature name='ht'/> > <feature name='ss'/> > <feature name='acpi'/> > <feature name='ds'/> > <feature name='pse36'/> > </cpu> > > Kind regards > > Struan Bartlett > > -- > > Struan Bartlett > NewsNow Publishing Limited > > Tel: +44 (0)845 838 8890 > Fax: +44 (0)845 838 8898 > > The UK's #1 News Portal: > > > Also tailored for Mobile: > > > Now with FREE Personalisation: > > > Bespoke B2B Internet News Monitoring: > > Internet News Monitoring > <http://www.newsnow.co.uk/services/newsmonitoring/> > > Bespoke B2B Headlines for Websites: > > > NewsNow Publishing Limited, trading also as NewsNow.co.uk, is a company > registered in England and Wales under company no. 3435857 with > registered office The Euston Office, 1 Euston Square, 40 Melton Street, > London NW1 2FD > > _______________________________________________ > libvirt-users mailing list > libvirt-users(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users

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