[Xen-users] Re: Xen shows single processor on a dual core system

["Todd Deshane" <deshantm@xxxxxxxxx>]

Hi Saravana,

You should keep this information on the list so that others can help too.

Cheers,
Todd

On Mon, Jun 16, 2008 at 5:12 AM, Saravana Kumar K, Bangalore <SaravanaKumar.k@xxxxxx> wrote:

Hello Todd,

 

Query which I asked  

  On dual core processor machine, I installed ubuntu-8.04 in which I installed xen-3.2.

  In ubuntu:

  # cat /proc/cpuinfo à Shows two processors information.

  But in Xen on the same machine:

  # cat /proc/cpuinfo à Shows only one processor information.

Please find my answers inline

 

Just to clarify you have a dual-core, single processor system (two cores on a single chip) right?

Yes, it has two cores on a single chip.

How did you install Xen 3.2 on ubuntu, which kernel are you using?

 

Build from source.

Kernel version is: 2.6.18.8-xen
 

Is one of your kernels SMP on the other not SMP?

I am sorry, I did not get you here

Please find uname –a (Xen) output:

Linux luser-desktop 2.6.18.8-xen #1 SMP Mon Jun 9 18:22:20 IST 2008 i686 GNU/Linux

Cat  /proc/cpuinfo à In ubuntu

processor       : 0

vendor_id       : GenuineIntel

cpu family      : 6

model           : 15

model name      : Intel(R) Core(TM)2 Duo CPU     E6750  @ 2.66GHz

stepping        : 11

cpu MHz         : 1998.000

cache size      : 4096 KB

physical id     : 0

siblings        : 2

core id         : 0

cpu cores       : 2

fdiv_bug        : no

hlt_bug         : no

f00f_bug        : no

coma_bug        : no

fpu             : yes

fpu_exception   : yes

cpuid level     : 10

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 lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr lahf_lm

bogomips        : 5336.77

clflush size    : 64

 

processor       : 1

vendor_id       : GenuineIntel

cpu family      : 6

model           : 15

model name      : Intel(R) Core(TM)2 Duo CPU     E6750  @ 2.66GHz

stepping        : 11

cpu MHz         : 1998.000

cache size      : 4096 KB

physical id     : 0

siblings        : 2

core id         : 1

cpu cores       : 2

fdiv_bug        : no

hlt_bug         : no

f00f_bug        : no

coma_bug        : no

fpu             : yes

fpu_exception   : yes

cpuid level     : 10

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 lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr lahf_lm

bogomips        : 5333.09

clflush size    : 64

 

 

cat  /proc/cpuinfo à In Xen

 

processor       : 0

vendor_id       : GenuineIntel

cpu family      : 6

model           : 15

model name      : Intel(R) Core(TM)2 Duo CPU     E6750  @ 2.66GHz

stepping        : 11

cpu MHz         : 2666.418

cache size      : 4096 KB

fdiv_bug        : no

hlt_bug         : no

f00f_bug        : no

coma_bug        : no

fpu             : yes

fpu_exception   : yes

cpuid level     : 10

wp              : yes

flags           : fpu de tsc msr pae cx8 apic mtrr cmov pat clflush acpi mmx fxsr sse sse2 ss ht constant_tsc up pni

bogomips        : 5423.10

 

 

Thanks

Saravana

 

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