Darryl Bowler
2007-Dec-18 05:41 UTC
[Fedora-xen] AMD 64 X2 5200 - XEN only detects one core
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@builder6.centos.org) (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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Lamont Peterson
2007-Dec-18 08:55 UTC
Re: [Fedora-xen] AMD 64 X2 5200 - XEN only detects one core
On Monday 17 December 2007 10:41:26 pm Darryl Bowler wrote:> I have an ACER AM3100-UD5200A which uses an AMD 64 X2 5200. > > Xen only detects one of two coresHave you checked your BIOS config? I''ve heard of (though none of my multi-core systems have such) support in some BIOSes to enable/disable he ''extra'' cores. -- Lamont Peterson <lamont@gurulabs.com> Senior Instructor Guru Labs, L.C. [ http://www.GuruLabs.com/ ] NOTE: All messages from this email address should be digitally signed with my 0xDC0DD409 GPG key. It is available on the pgp.mit.edu keyserver as well as other keyservers that sync with MIT''s.