<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><div>I have an ACER AM3100-UD5200A which uses an AMD 64 X2 5200.<br><br>Xen only detects one of two cores<br><br>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.<br><br><br>checking /proc/cpuinfo <br>there is only one core<br>[root@dom0 lib]# more /proc/cpuinfo <br>processor : 0<br>vendor_id : AuthenticAMD<br>cpu family : 15<br>model : 67<br>model name : AMD Athlon(tm) 64 X2 Dual Core Processor
5200+<br>stepping : 2<br>cpu MHz : 2593.594<br>cache size : 1024 KB<br>physical id : 0<br>siblings : 1<br>core id : 0<br>cpu cores : 1<br>fpu : yes<br>fpu_exception : yes<br>cpuid level : 1<br>wp : yes<br>flags : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 clflush mmx fxsr sse sse2 ht sysca<br>ll nx mmxext fxsr_opt lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm cr8_legacy<br>bogomips :
6485.48<br>TLB size : 1024 4K pages<br>clflush size : 64<br>cache_alignment : 64<br>address sizes : 40 bits physical, 48 bits virtual<br>power management: ts fid vid ttp tm stc<br><br><br>Heres dmesg from CentOS<br><br>Bootdata ok (command line is ro root=/dev/VolGroup00/LogVol00 rhgb quiet)<br>Linux version 2.6.18-53.el5xen (mockbuild@builder6.centos.org) (gcc version 4.1.2 20070626 (Red Hat 4.1.2<br>-14)) #1 SMP Mon Nov 12 02:46:57 EST 2007<br>BIOS-provided physical RAM map:<br> Xen: 0000000000000000 - 00000000a5250000 (usable)<br>On node 0 totalpages: 676432<br> DMA zone: 676432 pages, LIFO batch:31<br>DMI 2.5 present.<br>ACPI: RSDP (v002 ACRSYS ) @ 0x00000000000f80c0<br>ACPI: RSDT
(v001 ACRSYS ACRPRDCT 0x42302e31 AWRD 0x00000000) @ 0x00000000affe3000<br>ACPI: FADT (v001 ACRSYS ACRPRDCT 0x42302e31 AWRD 0x00000000) @ 0x00000000affe3080<br>ACPI: SSDT (v001 PTLTD POWERNOW 0x00000001 LTP 0x00000001) @ 0x00000000affe7cc0<br>ACPI: HPET (v001 ACRSYS ACRPRDCT 0x42302e31 AWRD 0x00000098) @ 0x00000000affe7f80<br>ACPI: SLIC (v001 ACRSYS ACRPRDCT 0x42302e31 AWRD 0x00000020) @ 0x00000000affe7fc0<br>ACPI: MCFG (v001 ACRSYS ACRPRDCT 0x42302e31 AWRD 0x00000000) @ 0x00000000affe8140<br>ACPI: MADT (v001 ACRSYS ACRPRDCT 0x42302e31 AWRD 0x00000000) @ 0x00000000affe7c40<br>ACPI: DSDT (v001 ACRSYS ACRPRDCT 0x00001000 MSFT 0x03000000) @ 0x0000000000000000<br>ACPI: Local APIC address 0xfee00000<br>ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)<br>ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)<br>ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])<br>ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])<br>ACPI: IOAPIC (id[0x02]
address[0xfec00000] gsi_base[0])<br>IOAPIC[0]: apic_id 2, version 33, address 0xfec00000, GSI 0-23<br>ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)<br>ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)<br>ACPI: IRQ0 used by override.Kernel command line: ro root=/dev/VolGroup00/LogVol00 rhgb quiet<br>Initializing CPU#0<br>PID hash table entries: 4096 (order: 12, 32768 bytes)<br>Xen reported: 2593.594 MHz processor.<br>Console: colour VGA+ 80x25<br>Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes)<br>Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)<br>Software IO TLB enabled: <br> Aperture: 64 megabytes<br> Kernel range: 0xffff880004847000 - 0xffff880008847000<br>PCI-DMA: Using software bounce buffering for IO (SWIOTLB)<br>Memory: 2563840k/2705728k available (2357k kernel code, 133072k reserved, 1326k data, 172k init)<br>Calibrating delay using timer specific routine..
6485.48 BogoMIPS (lpj=12970967)<br>Security Framework v1.0.0 initialized<br>SELinux: Initializing.<br>SELinux: Starting in permissive mode<br>selinux_register_security: Registering secondary module capability<br>Capability LSM initialized as secondary<br>Mount-cache hash table entries: 256<br>CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)<br>CPU: L2 Cache: 1024K (64 bytes/line)<br>CPU: Physical Processor ID: 0<br>CPU: Processor Core ID: 0<br>(SMP-)alternatives turned off<br>ACPI: Core revision 20060707<br>Brought up 1 CPUs<br>sizeof(vma)=168 bytes<br>sizeof(page)=56 bytes<br>sizeof(inode)=560 bytes<br>sizeof(dentry)=216 bytes<br>sizeof(ext3inode)=760 bytes<br>sizeof(buffer_head)=96 bytes<br>sizeof(skbuff)=240 bytes<br><br>ACPI: IRQ2 used by override.<br>ACPI: IRQ9 used by override.<br>Setting APIC routing to xen<br>Using ACPI (MADT) for SMP configuration information<br>Allocating PCI resources starting at b4000000
(gap: b0000000:30000000)<br>Built 1 zonelists. Total pages: 676432<br><br><br><br><br><br>[2007-12-18 01:59:05 xend.XendDomainInfo 3028] DEBUG (XendDomainInfo:756) Storing VM details: {'shadow_me<br>mory': '0', 'uuid': '00000000-0000-0000-0000-000000000000', 'on_reboot': 'restart', 'on_poweroff': 'destr<br>oy', 'name': 'Domain-0', 'xend/restart_count': '0', 'vcpus': '1', 'vcpu_avail': '1', 'memory': '2635', 'o<br>n_crash': 'restart', 'maxmem': '2635'}<br><br><br><br></div></div><br>
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