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There are many times when one has to check CPU details of the server which are like the number of cores, sockets, etc. This detail is useful in capacity planning, troubleshooting, performance analysis, etc. There are many ways to get these details as below –

ioscancommandcstm toolprint_manifestreportmachinfocommandMP consoletopcommandSAR output

Before going into these methods make sure you check if logical CPUs are enabled on server or not.If yes then you need to take that into consideration while calculating the number of CPUs.

Let’s see the above methods one by one.

ioscan command

This is a well-known command to every HPUX server administrator. To scan or list hardware on the system, we use this command. Filtering processors out of this command give you details about CPU. This is helpful to get the only number of processors on the system

[server12] MP:CM> ssSSSystem Processor Status:Monarch Processor: 0Processor Module 0: Installed and ConfiguredProcessor Module 1: Installed and ConfiguredProcessor Module 2: Installed and ConfiguredProcessor Module 3: Installed and Configured

top command

This is the simplest way to check the number of CPU on HPUX as well as any Linux system. The top output shows your list of the processor at top of the page.

# topSystem: server1 Fri Nov 25 14:29:06 2016Load averages: 0.15, 0.11, 0.11386 processes: 362 sleeping, 24 runningCpu states:CPU LOAD USER NICE SYS IDLE BLOCK SWAIT INTR SSYS0 0.13 23.8% 0.0% 0.0% 76.2% 0.0% 0.0% 0.0% 0.0%1 0.18 25.7% 0.0% 7.9% 66.3% 0.0% 0.0% 0.0% 0.0%2 0.16 14.9% 0.0% 2.0% 83.2% 0.0% 0.0% 0.0% 0.0%3 0.13 3.0% 0.0% 5.0% 92.1% 0.0% 0.0% 0.0% 0.0%4 0.13 23.8% 0.0% 4.0% 72.3% 0.0% 0.0% 0.0% 0.0%5 0.15 17.8% 0.0% 4.0% 78.2% 0.0% 0.0% 0.0% 0.0%6 0.15 11.9% 0.0% 4.0% 84.2% 0.0% 0.0% 0.0% 0.0%7 0.16 20.8% 0.0% 5.0% 74.3% 0.0% 0.0% 0.0% 0.0%--- ---- ----- ----- ----- ----- ----- ----- ----- -----avg 0.15 17.8% 0.0% 4.0% 78.2% 0.0% 0.0% 0.0% 0.0%

You can see CPU is numbered from 0 to 8 i.e. total of 8 CPU active.

sar output

Even sar output can be used to determine the number of CPU in the system. Use just one iteration for output for one second. sar will show one row for each cpu value.

Read our SAR tutorialsSAR: All you need to knowSAR: CPU & Memory reportingSAR: Disk & Network reporting

Counting the number of rows can help us figure out CPU count.

# sar -Mu 1 1HP-UX apcrss78 B.11.11 U 9000/80011/25/1614:41:14 cpu %usr %sys %wio %idle14:41:15 0 0 0 0 991 0 1 0 982 0 0 0 993 0 0 0 994 0 0 0 995 0 0 0 996 24 1 0 757 0 1 0 98system 3 1 0 96# sar -Mu 1 1 | awk "END {print NR-5}"8

See first command actual output. We are stripping off extra 5 lines which are for total, headers to get exact count using awk. in second command. Even first output shows CPU numbering like top in first column!

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