gla
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Ubuntu Intel Xeon E5420 quad core available only one core
I had install an Ubuntu x64 9.04 and upgrade it to x64 10.04 but I have problem with cpu cores.
when I run cat /proc/cpuinfo
I take the following info:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Xeon(R) CPU E5420 @ 2.50GHz
stepping : 6
cpu MHz : 2500.000
cache size : 6144 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
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 ss ht tm pbe syscall nx lm constant_tsc up arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 lahf_lm tpr_shadow vnmi flexpriority
bogomips : 4988.07
clflush size : 64
cache_alignment : 64
address sizes : 38 bits physical, 48 bits virtual
power management:
why cpu cores is 1 and not 4?
also
the command
lshw -class cpu
return:
*-cpu:0
description: CPU
product: Intel(R) Xeon(R) CPU E5420 @ 2.50GHz
vendor: Intel Corp.
physical id: 4
bus info: cpu@0
slot: LGA771
size: 2500MHz
capacity: 3330MHz
width: 64 bits
clock: 333MHz
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx x86-64 constant_tsc up arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 lahf_lm tpr_shadow vnmi flexpriority cpufreq
*-cpu:1 DISABLED
description: CPU [empty]
vendor: Intel
physical id: 5
version: 00000000000000000000000000 0000000000 0000000000 0000000000 00000000
slot: LGA771
*-cpu:2 DISABLED
description: CPU [empty]
vendor: Intel
physical id: 6
version: 00000000000000000000000000 0000000000 0000000000 0000000000 00000000
slot: LGA771
*-cpu:3 DISABLED
description: CPU [empty]
vendor: Intel
physical id: 7
version: 00000000000000000000000000 0000000000 0000000000 0000000000 00000000
slot: LGA771
any idea?
when I run cat /proc/cpuinfo
I take the following info:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Xeon(R) CPU E5420 @ 2.50GHz
stepping : 6
cpu MHz : 2500.000
cache size : 6144 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
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 ss ht tm pbe syscall nx lm constant_tsc up arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 lahf_lm tpr_shadow vnmi flexpriority
bogomips : 4988.07
clflush size : 64
cache_alignment : 64
address sizes : 38 bits physical, 48 bits virtual
power management:
why cpu cores is 1 and not 4?
also
the command
lshw -class cpu
return:
*-cpu:0
description: CPU
product: Intel(R) Xeon(R) CPU E5420 @ 2.50GHz
vendor: Intel Corp.
physical id: 4
bus info: cpu@0
slot: LGA771
size: 2500MHz
capacity: 3330MHz
width: 64 bits
clock: 333MHz
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx x86-64 constant_tsc up arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 lahf_lm tpr_shadow vnmi flexpriority cpufreq
*-cpu:1 DISABLED
description: CPU [empty]
vendor: Intel
physical id: 5
version: 00000000000000000000000000
slot: LGA771
*-cpu:2 DISABLED
description: CPU [empty]
vendor: Intel
physical id: 6
version: 00000000000000000000000000
slot: LGA771
*-cpu:3 DISABLED
description: CPU [empty]
vendor: Intel
physical id: 7
version: 00000000000000000000000000
slot: LGA771
any idea?
ASKER
yes
the result of uname -a is:
Linux 2.6.32-24-server #43-Ubuntu SMP Thu Sep 16 16:05:42 UTC 2010 x86_64 GNU/Linux
the result of uname -a is:
Linux 2.6.32-24-server #43-Ubuntu SMP Thu Sep 16 16:05:42 UTC 2010 x86_64 GNU/Linux
Isn't it a virtual machine, your Linux running on?
ASKER
No is not virtual mashine
setup the linux-image-pae kernel
can you send the output of dmesg also
ASKER
following the dmesg
dmesg
dmesg
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ASKER
this is an Ubuntu bug
uname -a