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CPU and Cores information

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Operating Systems Linux Red Hat CPU and Cores information
# 1  
Old 01-26-2017
CPU and Cores information
Hi all.
I have a question about linux command to find number of CPU and Core.
I usually use the command dmidecode -t processor to find cpu and core numbers . On this machine with Red Hat 4. 0 when I try to insert the command is returned the error
Code:
-bash: dmidecode: command not found

I try to use the following command
Code:
cat /proc/cpuinfo | grep processor | wc -l
1

cat /proc/cpuinfo | grep cpu | wc -l
3

It is mean that on the machine there is only one processor with 3 cores?
thanks a lot for the collaboration
Last edited by rbatte1; 01-26-2017 at 09:33 AM.. Reason: Added code tags & ICODE tags for clarity
# 2  
Old 01-26-2017
What does
Code:
cat  /proc/cpuinfo

show? Please post. This should give you an answer.
# 3  
Old 01-26-2017
Code:
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 4
model name      : Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping        : 9
cpu MHz         : 3000.246
cache size      : 1024 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 5
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 nx lm
bogomips        : 5989.99


Moderator's Comments:
Mod Comment Please use CODE tags for output data as required by forum rules!
Last edited by RudiC; 01-26-2017 at 10:21 AM.. Reason: Added CODE tags.
# 4  
Old 01-26-2017
What would lscpu yield?
# 5  
Old 01-26-2017
If that's all /proc/cpuinfo had, you have one core. (Or perhaps, only one core detected/supported by the kernel - but this looks like an old Pentium 4, which could conceivably be single-core.)
This User Gave Thanks to Corona688 For This Post:
piccolinomax
# 6  
Old 01-26-2017
To Find how many cores and cores per socket:
Code:
#lscpu | grep -i 'socket'

To Find how many CPUs :
Code:
#grep -i "physical id" /proc/cpuinfo | sort -u | wc -l

Best way will be the usage of xsos command.(This work on RHEL4)
You can get it on github site.

Cheers...!
Last edited by rbatte1; 01-27-2017 at 11:28 AM.. Reason: Added CODE tags
# 7  
Old 01-27-2017
CPU and Cores information on CentOS 5.5
Hi all,
I am confused how is possible to find the physical cores and cpu installed on a Centos 5.5 machine.
I tried several commands with different answers (below are reported the command tried and the answers).
Can you help me to find the total phisical core and cpu per core?
Thanks a lot

1. I tried the dmidecode -t processor but the answer is
Code:
# dmidecode 2.10
/dev/mem: Permission denied

2. I insert the command [code]more /proc/cpuinfo[/icode] and the answer is
Code:
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 44
model name      : Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz
stepping        : 2
cpu MHz         : 2400.086
cache size      : 12288 KB
physical id     : 0
siblings        : 1
core id         : 0
cpu cores       : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc ida arat pni est ssse
3 cx16 sse4_1 sse4_2 popcnt lahf_lm
bogomips        : 6002.38
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 6
model           : 44
model name      : Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz
stepping        : 2
cpu MHz         : 2400.086
cache size      : 12288 KB
physical id     : 1
siblings        : 1
core id         : 0
cpu cores       : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc ida arat pni est ssse
3 cx16 sse4_1 sse4_2 popcnt lahf_lm
bogomips        : 6002.38
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:

processor       : 2
vendor_id       : GenuineIntel
cpu family      : 6
model           : 44
model name      : Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz
stepping        : 2
cpu MHz         : 2400.086
cache size      : 12288 KB
physical id     : 2
siblings        : 1
core id         : 0
cpu cores       : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc ida arat pni est ssse
3 cx16 sse4_1 sse4_2 popcnt lahf_lm
bogomips        : 6002.38
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:

processor       : 3
vendor_id       : GenuineIntel
cpu family      : 6
model           : 44
model name      : Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz
stepping        : 2
cpu MHz         : 2400.086
cache size      : 12288 KB
physical id     : 3
siblings        : 1
core id         : 0
cpu cores       : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc ida arat pni est ssse
3 cx16 sse4_1 sse4_2 popcnt lahf_lm
bogomips        : 6002.38
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:

processor       : 4
vendor_id       : GenuineIntel
cpu family      : 6
model           : 44
model name      : Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz
stepping        : 2
cpu MHz         : 2400.086
cache size      : 12288 KB
physical id     : 4
siblings        : 1
core id         : 0
cpu cores       : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc ida arat pni est ssse
3 cx16 sse4_1 sse4_2 popcnt lahf_lm
bogomips        : 6002.38
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:

processor       : 5
vendor_id       : GenuineIntel
cpu family      : 6
model           : 44
model name      : Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz
stepping        : 2
cpu MHz         : 2400.086
cache size      : 12288 KB
physical id     : 5
siblings        : 1
core id         : 0
cpu cores       : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc ida arat pni est ssse
3 cx16 sse4_1 sse4_2 popcnt lahf_lm
bogomips        : 6002.38
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:

processor       : 6
vendor_id       : GenuineIntel
cpu family      : 6
model           : 44
model name      : Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz
stepping        : 2
cpu MHz         : 2400.086
cache size      : 12288 KB
physical id     : 6
siblings        : 1
core id         : 0
cpu cores       : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc ida arat pni est ssse
3 cx16 sse4_1 sse4_2 popcnt lahf_lm
bogomips        : 6002.38
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:

processor       : 7
vendor_id       : GenuineIntel
cpu family      : 6
model           : 44
model name      : Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz
stepping        : 2
cpu MHz         : 2400.086
cache size      : 12288 KB
physical id     : 7
siblings        : 1
core id         : 0
cpu cores       : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc ida arat pni est ssse
3 cx16 sse4_1 sse4_2 popcnt lahf_lm
bogomips        : 6002.38
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:


3. I insert cat /proc/cpuinfo | grep processor | wc -l and the anwer is
8

4. I insert cat /proc/cpuinfo | grep cpu | wc -l and the anwer is
32


Moderator's Comments:
Mod Comment Use code tags, thanks.
Last edited by zaxxon; 01-27-2017 at 08:23 AM.. Reason: code tags
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