topic Process Utilization per Core in Scripts

Process Utilization per Core

HeikoAnkenbrand — Tue, 01 Dec 2020 16:17:15 GMT

With this onliner you can view the process load of each core.
Change the variable CORE to the correct core number (for example CORE=3):

CORE=3; ps --sort=-c -e -o pid,psr,%cpu,%mem,cmd | grep -E "^[[:space:]][[:digit:]]+[[:space:]]+${CORE}"

ps L       -> List all format specifiers (for example pid, psr, %cpu, %mem, ...)

There is still much potential for improvement here 🙂

Re: ONELINER - process utilization per core

HeikoAnkenbrand — Fri, 17 Jan 2020 12:07:08 GMT

I always use this one:

watch -n 1 'CORE=2; ps --sort=-c -e -o pid,psr,%cpu,%mem,wchan,vsize,time,cmd | grep -E "^[[:space:]][[:digit:]]+[[:space:]]+${CORE}"'

> Refresh display every second
> For core two (set CORE=x parameter)
> Is sorted by CPU load
> The following fields are used:
   - Process ID
   - Core
   - CPU utilization in %
   - Memory utilization in %
   - Process type
   - Process memory usage in KB
   - Process time
   - Process path+command

Output:

If you want to sort it by memory usage, use this:

watch -n 1 'CORE=2; ps --sort=-vsize -e -o pid,psr,%cpu,%mem,wchan,vsize,time,cmd | grep -E "^[[:space:]][[:digit:]]+[[:space:]]+${CORE}"'

Re: ONELINER - process utilization per core

KernelGordon — Fri, 17 Jan 2020 00:00:50 GMT

Really like this one-liner, made a small change to have it run over all cores and sort by CPU usage or Memory usage:

Sort by CPU:

echo "" > coreload.txt ; for (( cpuCore = 0; cpuCore < $(cpstat os -f cpu | grep Number: | awk '{print $3}'); ++cpuCore )); do CORE=${cpuCore}; ps -e -o pid,psr,%cpu,%mem,cmd | grep -E "^[[:space:]][[:digit:]]+[[:space:]]+${CORE}" >> coreload.txt; done ; cat coreload.txt | sort -k3 -gr

Sort by Memory:

Re: ONELINER - process utilization per core

HeikoAnkenbrand — Fri, 17 Jan 2020 11:39:25 GMT

Hi @KernelGordon,

You can use this! It is quick and easy:

ps --sort=-c -e -o pid,psr,%cpu,%mem,wchan,vsize,time,cmd

ps --sort=-vsize -e -o pid,psr,%cpu,%mem,wchan,vsize,time,cmd

You can sort directly into ps with "--sort". If you use a "--sort=-" it will sort in reverse order 🙂

Re: ONELINER - process utilization per core

HeikoAnkenbrand — Fri, 17 Jan 2020 11:56:14 GMT

Or just to monitor the firewall workers

watch -n 1 'ps --sort=-c -e -o pid,psr,%cpu,%mem,wchan,time,cmd |grep "fw_worker_"|grep -v pipe|grep -v grep '

Output:

Re: ONELINER - process utilization per core

KernelGordon — Fri, 17 Jan 2020 19:08:20 GMT

Nice find! I wasn't aware of the 'psr' format specifier. Time to read the man page and see if there are any other neat things to add to this 😀