Re: [Xen-devel] cpu recognition

[Karl Rister <kmr@xxxxxxxxxx>]

On Monday 28 November 2005 3:55 pm, Ian Pratt wrote:
> > I am seeing a weird anomaly where Xen is correctly
> > recognizing the speed of the cpu's in the box but Linux in
> > Domain-0 is not.  The cpu's are Intel Xeon 704x (dual core
> > 3GHz, either 7040 - 667 MHz FSB - or 7041 - 800 MHz FSB).
> > When I boot on a baremetal 2.6.12 Linux kernel it correctly
> > identifies the chip speed.  Has anyone seen this and is it a problem?
>
> Please can you try running the following in dom0:
>
> hwclock; date; sleep 10; hwclock; date

Output is:

Mon 28 Nov 2005 04:26:08 PM CST  -0.454938 seconds
Mon Nov 28 16:26:08 CST 2005
Mon 28 Nov 2005 04:26:19 PM CST  -0.987975 seconds
Mon Nov 28 16:26:19 CST 2005

>
> Thanks,
> Ian
>
> > xm info:
> >
> > system                 : Linux
> > host                   : ---
> > release                : 2.6.12-xen0-smp
> > version                : #1 SMP Mon Nov 28 13:59:13 CST 2005
> > machine                : x86_64
> > nr_cpus                : 16
> > nr_nodes               : 1
> > sockets_per_node       : 4
> > cores_per_socket       : 2
> > threads_per_core       : 2
> > cpu_mhz                : 3002
> > hw_caps                :
> > bfebfbff:20100800:00000000:00000080:000065bd:00000000:0
> > 0000001
> > memory                 : 16383
> > free_memory            : 133
> > xen_major              : 3
> > xen_minor              : 0
> > xen_extra              : -devel
> > xen_caps               : xen-3.0-x86_64 hvm-3.0-x86_64
> > platform_params        : virt_start=0xffff800000000000
> > xen_changeset          : Mon Nov 28 11:22:02 2005
> > 8090:243265ade4045314ee4170436
> > cc704afa
> > cc_compiler            : gcc version 4.0.0 20050519 (Red Hat 4.0.0-8)
> > cc_compile_by          : root
> > cc_compile_domain      : ---
> > cc_compile_date        : Mon Nov 28 13:56:08 CST 2005
> >
> > /proc/cpuinfo:
> >
> > processor       : 0
> > vendor_id       : GenuineIntel
> > cpu family      : 15
> > model           : 4
> > model name      :                    Genuine Intel(R) CPU 3.00GHz
> > stepping        : 8
> > cpu MHz         : 4222.844
> > cache size      : 2048 KB
> > physical id     : 0
> > siblings        : 4
> > core id         : 0
> > cpu cores       : 2
> > fpu             : yes
> > fpu_exception   : yes
> > cpuid level     : 5
> > 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 syscall
> > nx lm constant_tsc  pni monitor ds_cpl est tm2 cid cx16 xtpr lahf_lm
> > bogomips        : 8388.60
> > clflush size    : 64
> > cache_alignment : 128
> > address sizes   : 40 bits physical, 48 bits virtual
> > power management:
> > </snip>
> >
> >
> >
> > --
> > Karl Rister
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel

-- 
Karl Rister

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