I want to check how many cores my Python script is using.
Suppose that I have this code:
while True:
print('Hello World!')
When I run top
, it gives the CPU, Memory, percentage in addition to other information but not the cores id or how many cores the process is using.
top - 11:44:15 up 1 day, 23:08, 1 user, load average: 2.88, 2.39, 2.15
Tasks: 289 total, 5 running, 238 sleeping, 0 stopped, 0 zombie
%Cpu(s): 55.2 us, 31.8 sy, 0.0 ni, 12.8 id, 0.0 wa, 0.0 hi, 0.2 si, 0.0 st
KiB Mem : 7945496 total, 1027328 free, 4707680 used, 2210488 buff/cache
KiB Swap: 15999996 total, 14991876 free, 1008120 used. 2615420 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
15336 lenovo 20 0 4393044 470488 192616 S 8.6 5.9 148:18.31 firefox
4412 lenovo 20 0 4521092 437940 65416 R 15.6 5.5 87:58.54 gnome-shell
4221 root 20 0 561840 82500 45652 R 9.9 1.0 84:25.21 Xorg
15395 lenovo 20 0 3871472 319376 151876 S 0.0 4.0 83:57.26 Web Content
2838 lenovo 20 0 3993616 823816 158412 R 68.5 10.4 36:28.10 Web Content
4435 lenovo 9 -11 2915368 11596 8836 S 0.3 0.1 35:46.08 pulseaudio
3342 lenovo 20 0 3060860 324000 127948 S 8.6 4.1 27:53.92 atom
29632 lenovo 20 0 3717204 750864 152688 S 10.3 9.5 22:25.05 Web Content
15443 lenovo 20 0 3273020 245772 50128 S 2.3 3.1 19:49.64 WebExtensions
3293 lenovo 20 0 1291576 215972 112612 S 4.6 2.7 15:38.90 atom
3319 lenovo 20 0 734208 226016 104340 S 5.6 2.8 14:52.60 atom
1446 root -51 0 0 0 0 S 1.0 0.0 14:21.71 irq/132-nvidia
16083 lenovo 20 0 446420 35468 27844 S 1.3 0.4 11:06.27 RDD Process
29733 lenovo 20 0 3537988 363160 235184 S 0.0 4.6 9:29.13 Web Content
29780 lenovo 20 0 3414220 363812 174640 S 0.3 4.6 7:50.64 Web Content
29570 lenovo 20 0 3068760 245412 125788 S 0.3 3.1 4:14.76 Web Content
1733 gdm 20 0 3464584 75712 45704 S 0.0 1.0 4:08.74 gnome-shell
I did some googling, and I found this command:
watch -tdn0.5 ps -mo pid,tid,%cpu,psr -p \`pgrep python\`
Which outputs:
PID TID %CPU PSR
15329 - 95.2 -
- 15329 95.2 1
Well I am not sure if the previous command really does the trick or not.
If anyone could give an explanation, I would be grateful.
EDIT:
I am using Ubuntu 18.04 the desktop version.
Kernel version :
4.15.0-99-generic #100-Ubuntu SMP Wed Apr 22 20:32:56 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux