[Xen-devel] xen can only detect one core of multiple cores cpu

[quizyjones <quizy_jones@xxxxxxxxxxx>]

I'm using a  Intel E5-2603 v3 @ 1.60GHz CPU of 6 cores. However, the dom0 can only find one core. here are some information that may helps in analyzing. 

~$ uname -a

Linux storage 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

~$ cat /proc/cpuinfo

processor       : 0

vendor_id       : GenuineIntel

cpu family      : 6

model           : 63

model name      : Intel(R) Xeon(R) CPU E5-2603 v3 @ 1.60GHz

stepping        : 2

microcode       : 0x27

cpu MHz         : 1600.035

cache size      : 15360 KB

physical id     : 0

siblings        : 1

core id         : 0

cpu cores       : 1

apicid          : 0

initial apicid  : 0

fpu             : yes

fpu_exception   : yes

cpuid level     : 15

wp              : yes

flags           : fpu de tsc msr pae mce cx8 apic sep mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl nonstop_tsc eagerfpu pni pclmulqdq monitor est ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm arat epb xsaveopt pln pts dtherm fsgsbase bmi1 avx2 bmi2 erms

bogomips        : 3200.07

clflush size    : 64

cache_alignment : 64

address sizes   : 46 bits physical, 48 bits virtual

power management:

The result of 'dmesg' is at http://paste.ubuntu.com/13544065/, 'xl dmesg' is at http://paste.ubuntu.com/13544201/

There are errors related with ACPI, so I modified the /etc/default/grub and changed the GRUB_CMDLINE_LINUX_DEFAULT from null to "quiet splash acpi=force". After reboot, the ACPI errors of  'dmesg' disappears. But still exists for 'xl dmesg' and dom0 can only find one core. The new 'dmesg' and 'xl dmesg' result is at http://paste.ubuntu.com/13544610/ and http://paste.ubuntu.com/13544633/

I've also tried the solution at http://lists.xen.org/archives/html/xen-devel/2012-06/msg00087.html and add acpi_rsdp=0xbabfe000 , still fails.

Other informations:

xentop - 00:51:08   Xen 4.4.1

1 domains: 1 running, 0 blocked, 0 paused, 0 crashed, 0 dying, 0 shutdown

Mem: 33451548k total, 8752508k used, 24699040k free    CPUs: 1 @ 1600MHz

      NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) MAXMEM(%) VCPUS NETS NETTX(k) NETRX(k) VBDS   VBD_OO   VBD_RD   VBD_WR  VBD_RSECT  VBD_WSECT SSID

  Domain-0 -----r         47    0.0    8388608   25.1    8388608      25.1     1    0        0        0    0        0        0        0          0          0    2

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