Which process runs on which CPU?

Ø You can use below command to detect which process runs on which CPU.

Running below command n times for PID 675 will give 2 different results listed below.
2 different result is not problematic because those numbers are in fact thread numbers and those 2 threads are belong to same core id at below lscpu command output, lscpu command proves us that Hyperthreading is enabled on this sample system.

[server1]~#ps -mo pid,tid,fname,user,%cpu,psr -p 675

PID TID COMMAND USER %CPU PSR

675 - oracle oracle 0.0 -

- 675 - oracle 0.0 8

[server1]~#ps -mo pid,tid,fname,user,%cpu,psr -p 675

PID TID COMMAND USER %CPU PSR

675 - oracle oracle 0.0 -

- 675 - oracle 0.0 20

[server1]~#

lscpu command Shows thread-core details

[server1]/#lscpu -ae

CPU NODE SOCKET CORE L1d:L1i:L2:L3 ONLINE

0 0 0 0 0:0:0:0 yes

1 0 0 1 1:1:1:0 yes

2 0 0 2 2:2:2:0 yes

3 0 0 3 3:3:3:0 yes

4 0 0 4 4:4:4:0 yes

5 0 0 5 5:5:5:0 yes

6 0 1 6 6:6:6:1 yes

7 0 1 7 7:7:7:1 yes

8 0 1 8 8:8:8:1 yes

9 0 1 9 9:9:9:1 yes

10 0 1 10 10:10:10:1 yes

11 0 1 11 11:11:11:1 yes

12 0 0 0 0:0:0:0 yes

13 0 0 1 1:1:1:0 yes

14 0 0 2 2:2:2:0 yes

15 0 0 3 3:3:3:0 yes

16 0 0 4 4:4:4:0 yes

17 0 0 5 5:5:5:0 yes

18 0 1 6 6:6:6:1 yes

19 0 1 7 7:7:7:1 yes

20 0 1 8 8:8:8:1 yes

21 0 1 9 9:9:9:1 yes

22 0 1 10 10:10:10:1 yes

23 0 1 11 11:11:11:1 yes

[server1]/#

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