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[Xen-users] cpu details are missing with xen!


  • To: xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: "Marco Strullato" <marco.strullato@xxxxxxxxx>
  • Date: Thu, 15 Jan 2009 11:32:02 +0100
  • Delivery-date: Thu, 15 Jan 2009 02:32:40 -0800
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>

Hi all, I have an application (weblogic 9.2) that does not recognize
all cpus on a xen environment.
The problems seems that something is missing from the cpu definition:
this is the output of a domU

processor       : 3
vendor_id       : GenuineIntel
cpu family      : 15
model           : 4
model name      : Intel(R) Xeon(TM) CPU 3.20GHz
stepping        : 10
cpu MHz         : 3200.316
cache size      : 2048 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 5
wp              : yes
flags           : fpu de tsc msr pae mce cx8 apic mtrr mca cmov pat pse36
clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm constant_tsc up pni
monitor ds_cpl cid cx16 xtpr lahf_lm
bogomips        : 8004.97

and this the output of a real linux server with no virtualization:

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 15
model           : 4
model name      :                   Intel(R) Xeon(TM) CPU 3.20GHz
stepping        : 10
cpu MHz         : 3200.296
cache size      : 2048 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 1
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 lm pni
monitor ds_cpl cid cx16 xtpr
bogomips        : 6399.37
clflush size    : 64
cache_alignment : 128
address sizes   : 36 bits physical, 48 bits virtual
power management:


as you can see something is missing on the domU:
siblings        : 2
core id         : 0
cpu cores       : 1

Please check http://kbase.redhat.com/faq/docs/DOC-7715





Why these information are not passed from the hardware to the dom0 and
domU?  (I mean also on dom0 I see the same output)





My xen version is 3.2

Regards


Marco Strullato

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