Re: [Xen-users] xen only shows only ONE "cpu core"

[Israel Garcia <igalvarez@xxxxxxxxx>]

On 12/18/09, Steven Timm <timm@xxxxxxxx> wrote:
>
> Is this on the dom0 or domU.
Hi, it's on a dom0.
processor is:
Intel(R) Xeon(R) CPU           E5410  @ 2.33GHz

>
> If on the domU, what value of vcpus do you have
> in the config file.
>
> For what it's worth on my dom0 Xeon E5430 CPU running
> xen kernel it shows 8 processor entries in /proc/cpuinfo
> and shows each one of them with cpu cores : 1 too.
I have another server (not a xen kernel) which show 4 "cpu core". see below:

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 23
model name      : Intel(R) Xeon(R) CPU           E5420  @ 2.50GHz
stepping        : 6
cpu MHz         : 2500.086
cache size      : 6144 KB
physical id     : 0
siblings        : 4
core id         : 0
cpu cores       : 4   <--- LOOK HERE
apicid          : 0
initial apicid  : 0
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 s
s ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good
pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr dca sse4_
1 lahf_lm
bogomips        : 5003.91
clflush size    : 64
cache_alignment : 64
address sizes   : 38 bits physical, 48 bits virtual
power management:

But this server runs a NON xen kernel. Both CPU's are quadcore.
That's why I'm  curious :)
Why with a normal kernel sees 4 cores and witn a xen kernel only one?
Same OS, almost same CPU (E5410-XEN_dom0 and E5420-NOT_XEN_SERVER)??

regards,
Israel.

>
> Steve Timm
>
>
> On Fri, 18 Dec 2009, Israel Garcia wrote:
>
>> Hi,
>> Do you know why xen kernel shows me only one "cpu cores" when there are 4?
>>
>> see part of cat /proc/cpuinfo
>>
>> processor       : 0
>> vendor_id       : GenuineIntel
>> cpu family      : 6
>> model           : 23
>> model name      : Intel(R) Xeon(R) CPU           E5410  @ 2.33GHz
>> stepping        : 10
>> cpu MHz         : 2333.430
>> cache size      : 6144 KB
>> physical id     : 0
>> siblings        : 1
>> core id         : 0
>> cpu cores       : 1    <---only ONE
>> apicid          : 0
>> initial apicid  : 0
>> fpu             : yes
>> fpu_exception   : yes
>> cpuid level     : 13
>> wp              : yes
>> flags           : fpu de tsc msr pae cx8 apic sep mtrr cmov pat
>> clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_ts
>> c rep_good pni ssse3 cx16 sse4_1 lahf_lm
>> bogomips        : 4674.06
>> clflush size    : 64
>> cache_alignment : 64
>> address sizes   : 38 bits physical, 48 bits virtual
>> power management:
>>
>> I'm running XEN on debian lenny:
>> grub-info:
>> title           Xen 3.2-1-amd64 / Debian GNU/Linux, kernel
>> 2.6.26-1-xen-amd64
>> root            (hd0,0)
>> kernel          /xen-3.2-1-amd64.gz
>> module          /vmlinuz-2.6.26-1-xen-amd64 root=/dev/mapper/vg0-root
>> ro console=tty0
>> module          /initrd.img-2.6.26-1-xen-amd64
>>
>> uname -r:
>> 2.6.26-1-xen-amd64
>>
>> regards,
>> Israel.
>>
>> _______________________________________________
>> Xen-users mailing list
>> Xen-users@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-users
>>
>
> --
> ------------------------------------------------------------------
> Steven C. Timm, Ph.D  (630) 840-8525
> timm@xxxxxxxx  http://home.fnal.gov/~timm/
> Fermilab Computing Division, Scientific Computing Facilities,
> Grid Facilities Department, FermiGrid Services Group, Assistant Group
> Leader.
>


-- 
Regards;
Israel Garcia

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