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[Xen-users] AMD 64 X2 5200 - XEN only detects one core

To: fedora-xen@xxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] AMD 64 X2 5200 - XEN only detects one core
From: Darryl Bowler <darryl.bowler@xxxxxxxxx>
Date: Mon, 17 Dec 2007 21:41:26 -0800 (PST)
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I have an ACER AM3100-UD5200A which uses an AMD 64 X2 5200.

Xen only detects one of  two cores

First I installed Fedora 8 + Xen that ships with the distro and found that only one core was detected when DOM0 booted. Out of frustration I decided to install CentOS 5.1 as a quick resolution to the problem, but found the same problem.

checking /proc/cpuinfo
there is only one core
[root@dom0 lib]# more /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 67
model name      : AMD Athlon(tm) 64 X2 Dual Core Processor 5200+
stepping        : 2
cpu MHz         : 2593.594
cache size      : 1024 KB
physical id     : 0
siblings        : 1
core id         : 0
cpu cores       : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 clflush mmx fxsr sse sse2 ht sysca
ll nx mmxext fxsr_opt lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm cr8_legacy
bogomips        : 6485.48
TLB size        : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc

Heres dmesg from CentOS

Bootdata ok (command line is ro root=/dev/VolGroup00/LogVol00 rhgb quiet)
Linux version 2.6.18-53.el5xen (mockbuild@xxxxxxxxxxxxxxxxxxx) (gcc version 4.1.2 20070626 (Red Hat 4.1.2
-14)) #1 SMP Mon Nov 12 02:46:57 EST 2007
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 00000000a5250000 (usable)
On node 0 totalpages: 676432
  DMA zone: 676432 pages, LIFO batch:31
DMI 2.5 present.
ACPI: RSDP (v002 ACRSYS                                ) @ 0x00000000000f80c0
ACPI: RSDT (v001 ACRSYS ACRPRDCT 0x42302e31 AWRD 0x00000000) @ 0x00000000affe3000
ACPI: FADT (v001 ACRSYS ACRPRDCT 0x42302e31 AWRD 0x00000000) @ 0x00000000affe3080
ACPI: SSDT (v001 PTLTD  POWERNOW 0x00000001  LTP 0x00000001) @ 0x00000000affe7cc0
ACPI: HPET (v001 ACRSYS ACRPRDCT 0x42302e31 AWRD 0x00000098) @ 0x00000000affe7f80
ACPI: SLIC (v001 ACRSYS ACRPRDCT 0x42302e31 AWRD 0x00000020) @ 0x00000000affe7fc0
ACPI: MCFG (v001 ACRSYS ACRPRDCT 0x42302e31 AWRD 0x00000000) @ 0x00000000affe8140
ACPI: MADT (v001 ACRSYS ACRPRDCT 0x42302e31 AWRD 0x00000000) @ 0x00000000affe7c40
ACPI: DSDT (v001 ACRSYS ACRPRDCT 0x00001000 MSFT 0x03000000) @ 0x0000000000000000
ACPI: Local APIC address 0xfee00000
ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)
ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
IOAPIC[0]: apic_id 2, version 33, address 0xfec00000, GSI 0-23
ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)
ACPI: IRQ0 used by override.Kernel command line: ro root=/dev/VolGroup00/LogVol00 rhgb quiet
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 32768 bytes)
Xen reported: 2593.594 MHz processor.
Console: colour VGA+ 80x25
Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes)
Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)
Software IO TLB enabled:
 Aperture:     64 megabytes
 Kernel range: 0xffff880004847000 - 0xffff880008847000
PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
Memory: 2563840k/2705728k available (2357k kernel code, 133072k reserved, 1326k data, 172k init)
Calibrating delay using timer specific routine.. 6485.48 BogoMIPS (lpj=12970967)
Security Framework v1.0.0 initialized
SELinux:  Initializing.
SELinux:  Starting in permissive mode
selinux_register_security:  Registering secondary module capability
Capability LSM initialized as secondary
Mount-cache hash table entries: 256
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 1024K (64 bytes/line)
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 0
(SMP-)alternatives turned off
ACPI: Core revision 20060707
Brought up 1 CPUs
sizeof(vma)=168 bytes
sizeof(page)=56 bytes
sizeof(inode)=560 bytes
sizeof(dentry)=216 bytes
sizeof(ext3inode)=760 bytes
sizeof(buffer_head)=96 bytes
sizeof(skbuff)=240 bytes

ACPI: IRQ2 used by override.
ACPI: IRQ9 used by override.
Setting APIC routing to xen
Using ACPI (MADT) for SMP configuration information
Allocating PCI resources starting at b4000000 (gap: b0000000:30000000)
Built 1 zonelists.  Total pages: 676432

[2007-12-18 01:59:05 xend.XendDomainInfo 3028] DEBUG (XendDomainInfo:756) Storing VM details: {'shadow_me
mory': '0', 'uuid': '00000000-0000-0000-0000-000000000000', 'on_reboot': 'restart', 'on_poweroff': 'destr
oy', 'name': 'Domain-0', 'xend/restart_count': '0', 'vcpus': '1', 'vcpu_avail': '1', 'memory': '2635', 'o
n_crash': 'restart', 'maxmem': '2635'}

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