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тАО11-13-2005 08:55 PM
тАО11-13-2005 08:55 PM
linux cpu id
As the two cpu are physical (not logical HT is disabled) the cpu physical ID should be different (e.g 0 and 6)
In my case DL 140 running redhat EL 3 with smp kernel 2.4.21.37 the ID are identical
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тАО11-13-2005 09:40 PM
тАО11-13-2005 09:40 PM
Re: linux cpu id
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тАО11-13-2005 09:42 PM
тАО11-13-2005 09:42 PM
Re: linux cpu id
http://lists.rlug.org/pipermail/rlug/2004-December/003237.html
hth.
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тАО11-13-2005 09:44 PM
тАО11-13-2005 09:44 PM
Re: linux cpu id
http://www.intel.com/cd/ids/developer/asmo-na/eng/dc/threading/knowledgebase/20416.htm?page=1
Seems that on dual processors host all processors return same CPUID.
The only difference between CPU is a serial number but cpuinfo does not return this info.
Regards,
Sergejs
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тАО11-13-2005 10:38 PM
тАО11-13-2005 10:38 PM
Re: linux cpu id
But when HT is disabled, sibling is equal to 1 and I don't see why the cpuid should be equal as the two cpu are distinct and physical, the cpuid (returned by /proc/cpuinfo) should be different at least it works like this and the two physical cpu are different on a dell server with two Xeon processor and the same linux kernel.
Now, I can add that I check the serial number ID using the linux command dmidecode and this command returns the two processor but with the same ID ie 29 0F 00 00 FF FB EB BF
strange isn't it?
same cpuid and same ID using dmidecode for two physical processor
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тАО11-13-2005 10:55 PM
тАО11-13-2005 10:55 PM
Re: linux cpu id
You can get new software at:
http://h18004.www1.hp.com/support/files/server/us/locate/101_5616.html
Regards,
Sergejs
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тАО11-13-2005 11:42 PM
тАО11-13-2005 11:42 PM
Re: linux cpu id
I load the BIOS upgrade from
http://h18023.www1.hp.com/support/files/server/us/locate/101_5771.html
without any succes in resolve my problem
another point the redhat EL 3 used is certified by HP to run on DL140 server...
So either I can find a solution to check that the two cpu are correctly used (and in that case cpu physical ID should be different) or I am sure that there is a bug from HP maybe in the BIOS?
sample codes find on http://www.intel.com/cd/ids/developer/asmo-na/eng/dc/threading/knowledgebase/20416.htm?page=1
are not very usefull because unfortunatly I can not succeed to make it run and compile under linux
But do someone agree with me when I say that without Hyperthreading two physical cpu should have two different physical id?
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тАО11-14-2005 12:34 AM
тАО11-14-2005 12:34 AM
Re: linux cpu id
/proc/cpuinfo output shows:
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.40GHz
stepping : 9
cpu MHz : 2399.398
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
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 t
m pbe cid
bogomips : 4784.12
processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.40GHz
stepping : 9
cpu MHz : 2399.398
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
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 t
m pbe cid
bogomips : 4797.23
processor : 2
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.40GHz
stepping : 9
cpu MHz : 2399.398
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
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 t
m pbe cid
bogomips : 4797.23
processor : 3
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.40GHz
stepping : 9
cpu MHz : 2399.398
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
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 t
m pbe cid
bogomips : 4797.23
Processor ID 's are different.
Regards,
Sergejs
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тАО11-14-2005 01:07 AM
тАО11-14-2005 01:07 AM
Re: linux cpu id
as a example cat /proc/cpuinfo in my case (with redhat)
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 3.06GHz
stepping : 9
cpu MHz : 3065.913
cache size : 512 KB
physical id : 0
siblings : 1
runqueue : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
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
bogomips : 6121.06
processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 3.06GHz
stepping : 9
cpu MHz : 3065.913
cache size : 512 KB
physical id : 0
siblings : 1
runqueue : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
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
bogomips : 6121.06
As you can see you can get the physical id of the cpu. And here the problem is that the cpu id are identical for two physical cpu
now on a HT enabled system
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 3.06GHz
stepping : 9
cpu MHz : 3065.930
cache size : 512 KB
physical id : 0
siblings : 2
runqueue : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
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
bogomips : 6121.06
processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 3.06GHz
stepping : 9
cpu MHz : 3065.930
cache size : 512 KB
physical id : 0
siblings : 2
runqueue : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
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
bogomips : 6121.06
processor : 2
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 3.06GHz
stepping : 9
cpu MHz : 3065.930
cache size : 512 KB
physical id : 6
siblings : 2
runqueue : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
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
bogomips : 6121.06
processor : 3
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 3.06GHz
stepping : 9
cpu MHz : 3065.930
cache size : 512 KB
physical id : 6
siblings : 2
runqueue : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
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
bogomips : 6121.06
and two logical cpu share the same physical id
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тАО11-14-2005 09:03 PM
тАО11-14-2005 09:03 PM