Number of CPU cores in Server

[Ajin_1]

HI

There are several commands there to find out no of cpu's in server

#iosacn -fnkC -processor |grep processor |wc -l

#machinfo

#top -w

#print_manifest

Is that any command specific for finding the CPU cores in HP-UX

or  No of CPU = No of Cores ?

[Dennis Handly]

If you have hyperthreading turned on, you may have more Logical CPUs than cores.

[Ajin_1]

 No of CPU count  = No of Cores  am I correct?

[Patrick Wallek]

>> No of CPU count  = No of Cores  am I correct?

Not necessarily, no.

If you have single-core chips, then number of cores equals number of physical cpu chips.

If you have dual-core chips, then number of cores is 2 times the number of physical cpu chips.

If you have hyperthreading enabled then you multiply everything by 2 for the number of logical CPUs.

[Torsten.]

Due to very different servers there is no single command that works everywhere to find this out.

"machinfo" is probably the best. It works always on Itanium servers, with 11.31 it works with pa-risc systems too.

There are single-core, dual-core, quad-core and in near future 8-core CPUs out there.

What server do you have?


Example for quad-core:

# machinfo
CPU info:
1 Intel(R) Itanium(R) Processor 9320 (1.33 GHz, 16 MB)
4.79 GT/s QPI, CPU version E0
4 logical processors (4 per socket)
...

[Dennis Handly]

>... number of physical CPU chips.

These are called sockets.

[Artur-M]

What is your OS version?

What CPU type is your machine?

Socket/core/LCPU makes a difference...

[fuusmani]

Hi Ajin,

if you have Glance or Glance Plus, it will show you the No of cores.

#glance

[Ozer YUMSEK]

Hi Ajin,

print_manifest command gives no of cpu.

#print_manifest

Look at the "System Hardware" part

Says Processors: 12

3 Intel Itanium Processor

12 logical processors (4 per socket)

Regards

[RAJD1]

You can check cpu type and based on that you can determine what type of cpu core you have on the cpu, 

check in # cat /var/tombstones/ts99   file for cpu type , or from machine architecture, (#model) 

If you have motecito processor , that means it is dual core cpu.  There are different types of cpu with different cores, like madison or montevale etc. 

Hth,

Raj D.