[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] xen only shows only ONE "cpu core"
On 12/18/09, Steven Timm <timm@xxxxxxxx> wrote: > I see the same behavior between Xen kernel showing cpu_cores=1 > and non-xen kernel showing cpu_cores=4 on the dom0 of a very > similar machine. Xen, and anything else, can still access > all the cores, it just reports them differently in /proc/cpuinfo > so that it makes it more difficult to detect a multi-core cpu > by parsing its output. Hi Steven It's possible what you're saying but we use to monitor CPU and only cpu-0 shows stats.. thee other 3 cpu-1,2,3 have never showed any stats. I think there's something wrong here.. regards, Israe. > > Steve Timm > > > > On Fri, 18 Dec 2009, Israel Garcia wrote: > >> 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. >>> >> >> >> > > -- > ------------------------------------------------------------------ > 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 _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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