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2,021
Votes: 4
Tags:
command-line
bash
cpu
cpu-load
multi-core
Link:
🔍 See Original Answer on Ask Ubuntu ⧉ 🔗
URL:
https://askubuntu.com/q/950465
Title:
How to list PIDs (procesees) for one CPU core only?
ID:
/2017/08/28/How-to-list-PIDs-_procesees_-for-one-CPU-core-only_
Created:
August 28, 2017
Upload:
September 15, 2024
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Use ps -eLF to list PIDs by CPU core number
The command ps -eLF will list PIDs by CPU core number. Then a script can filter the results to a specific core number.
Create a file called ~/bin/one-cpu-pids and mark it as executable using chmod a+x ~/bin/one-cpu-pids. Copy the following text into the file and save it:
#!/bin/bash
# NAME: one-cpu-pids
# PATH: /home/$USER/bin
# DESC: List pids running under one cpu core.
# CALL: one-cpu-pids CPUnumber
# DATE: Created Aug 27, 2017.
# NOTE: CPU number passed is ones based and converted to zero based.
if [[ $# -ne 1 ]]; then
echo 'One argument required for CPU number, e.g. "1" or "8"'
exit 1
fi
ZeroCPU=$1
let ZeroCPU--
ps -eLF | head -n 1 # Get heading
ps -eLF | awk -v a="$ZeroCPU" '$9 == a {print;}'
What the output looks like
Here is what the output looks like:
$ one-cpu-pids 8
UID PID PPID LWP C NLWP SZ RSS PSR STIME TTY TIME CMD
root 41 2 41 0 1 0 0 7 Aug26 ? 00:00:00 [watchdog/7]
root 42 2 42 0 1 0 0 7 Aug26 ? 00:00:03 [migration/7]
root 43 2 43 0 1 0 0 7 Aug26 ? 00:00:02 [ksoftirqd/7]
root 45 2 45 0 1 0 0 7 Aug26 ? 00:00:00 [kworker/7:0H]
root 82 2 82 0 1 0 0 7 Aug26 ? 00:00:00 [kthrotld]
root 91 2 91 0 1 0 0 7 Aug26 ? 00:00:00 [bioset]
root 188 2 188 0 1 0 0 7 Aug26 ? 00:00:00 [scsi_tmf_2]
root 221 2 221 0 1 0 0 7 Aug26 ? 00:00:00 [kworker/7:1H]
root 836 2 836 0 1 0 0 7 Aug26 ? 00:00:00 [iwlwifi]
rick 969 2019 971 0 4 167699 28180 7 Aug26 ? 00:00:00 /usr/lib/gnome-terminal/gnome-terminal-server
root 1087 1 1087 0 3 84400 1316 7 Aug26 ? 00:00:00 /usr/sbin/ModemManager
root 1219 1164 1219 0 1 17706 28 7 Aug26 ? 00:00:00 /usr/sbin/CRON -f
whoopsie 1447 1 1500 0 3 111935 468 7 Aug26 ? 00:00:00 /usr/bin/whoopsie -f
rick 1550 2019 1552 0 5 126175 4168 7 Aug26 ? 00:00:00 /usr/lib/gvfs/gvfsd-mtp --spawner :1.4 /org/gtk/gvfs/exec_spaw/6
rick 2008 1 2008 0 1 11312 3316 7 Aug26 ? 00:00:00 /lib/systemd/systemd --user
root 2213 2 2213 0 1 0 0 7 15:01 ? 00:00:00 [kworker/7:0]
rick 2231 2019 2277 0 4 106967 1308 7 Aug26 ? 00:00:00 /usr/lib/ibus/ibus-x11 --kill-daemon
rick 2383 2179 2384 0 3 47098 352 7 Aug26 ? 00:00:00 /usr/lib/ibus/ibus-engine-simple
rick 2401 2019 7819 0 6 300457 12584 7 Aug26 ? 00:00:00 /usr/lib/unity-settings-daemon/unity-settings-daemon
rick 2457 2019 2457 0 4 165937 4704 7 Aug26 ? 00:00:00 /usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service
rick 2485 2019 2485 0 4 314455 256 7 Aug26 ? 00:00:00 /usr/lib/evolution/evolution-source-registry
rick 2485 2019 2493 0 4 314455 256 7 Aug26 ? 00:00:00 /usr/lib/evolution/evolution-source-registry
rick 2594 2019 2597 0 3 89830 8700 7 Aug26 ? 00:00:00 /usr/lib/gvfs/gvfs-udisks2-volume-monitor
root 2598 1 2604 0 5 108271 6300 7 Aug26 ? 00:00:00 /usr/lib/udisks2/udisksd --no-debug
root 2643 1 2648 0 7 157184 7748 7 Aug26 ? 00:00:00 /usr/lib/x86_64-linux-gnu/fwupd/fwupd
rick 2696 2571 2703 0 7 204018 108 7 Aug26 ? 00:00:00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx2571x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backend/Calendar/2571/2
rick 2713 2571 2718 0 5 216464 376 7 Aug26 ? 00:00:00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx2571x3 --own-path /org/gnome/evolution/dataserver/Subprocess/Backend/Calendar/2571/3
rick 2930 2019 2933 0 4 106898 1012 7 Aug26 ? 00:00:00 /usr/lib/telepathy/mission-control-5
rick 2967 2019 2984 0 11 137962 5212 7 Aug26 ? 00:00:00 zeitgeist-datahub
rick 2967 2019 2987 0 11 137962 5212 7 Aug26 ? 00:00:00 zeitgeist-datahub
rick 3056 15524 3057 0 14 296507 208432 7 14:45 ? 00:00:00 /opt/google/chrome/chrome --type=renderer --enable-smooth-scrolling --field-trial-handle=14075765731346784657,198534808813688123,131072 --service-pipe-token=9469E58F676BDEF1550E34B4D700CB57 --lang=en-GB --enable-crash-reporter=b0f732a8-ad2f-4a2e-b904-4ab12fecf64e, --enable-offline-auto-reload --enable-offline-auto-reload-visible-only --blink-settings=disallowFetchForDocWrittenScriptsInMainFrame=false,disallowFetchForDocWrittenScriptsInMainFrameOnSlowConnections=true --enable-pinch --num-raster-threads=4 --enable-main-frame-before-activation --content-image-texture-target=0,0,3553;0,1,3553;0,2,3553;0,3,3553;0,4,3553;0,5,3553;0,6,3553;0,7,3553;0,8,3553;0,9,3553;0,10,3553;0,11,3553;0,12,3553;0,13,3553;0,14,3553;0,15,3553;0,16,3553;1,0,3553;1,1,3553;1,2,3553;1,3,3553;1,4,3553;1,5,3553;1,6,3553;1,7,3553;1,8,3553;1,9,3553;1,10,3553;1,11,3553;1,12,3553;1,13,3553;1,14,3553;1,15,3553;1,16,3553;2,0,3553;2,1,3553;2,2,3553;2,3,3553;2,4,3553;2,5,3553;2,6,3553;2,7,3553;2,8,3553;2,9,3553;2,10,3553;2,11,3553;2,12,3553;2,13,3553;2,14,3553;2,15,3553;2,16,3553;3,0,3553;3,1,3553;3,2,3553;3,3,3553;3,4,3553;3,5,3553;3,6,3553;3,7,3553;3,8,3553;3,9,3553;3,10,3553;3,11,3553;3,12,3553;3,13,3553;3,14,3553;3,15,3553;3,16,3553;4,0,3553;4,1,3553;4,2,3553;4,3,3553;4,4,3553;4,5,3553;4,6,3553;4,7,3553;4,8,3553;4,9,3553;4,10,3553;4,11,3553;4,12,3553;4,13,3553;4,14,3553;4,15,3553;4,16,3553 --disable-accelerated-video-decode --service-request-channel-token=9469E58F676BDEF1550E34B4D700CB57 --renderer-client-id=66 --shared-files=v8_natives_data:100,v8_snapshot_data:101
rick 3056 15524 3064 0 14 296507 208432 7 14:45 ? 00:00:00 /opt/google/chrome/chrome --type=renderer --enable-smooth-scrolling --field-trial-handle=14075765731346784657,198534808813688123,131072 --service-pipe-token=9469E58F676BDEF1550E34B4D700CB57 --lang=en-GB --enable-crash-reporter=b0f732a8-ad2f-4a2e-b904-4ab12fecf64e, --enable-offline-auto-reload --enable-offline-auto-reload-visible-only --blink-settings=disallowFetchForDocWrittenScriptsInMainFrame=false,disallowFetchForDocWrittenScriptsInMainFrameOnSlowConnections=true --enable-pinch --num-raster-threads=4 --enable-main-frame-before-activation --content-image-texture-target=0,0,3553;0,1,3553;0,2,3553;0,3,3553;0,4,3553;0,5,3553;0,6,3553;0,7,3553;0,8,3553;0,9,3553;0,10,3553;0,11,3553;0,12,3553;0,13,3553;0,14,3553;0,15,3553;0,16,3553;1,0,3553;1,1,3553;1,2,3553;1,3,3553;1,4,3553;1,5,3553;1,6,3553;1,7,3553;1,8,3553;1,9,3553;1,10,3553;1,11,3553;1,12,3553;1,13,3553;1,14,3553;1,15,3553;1,16,3553;2,0,3553;2,1,3553;2,2,3553;2,3,3553;2,4,3553;2,5,3553;2,6,3553;2,7,3553;2,8,3553;2,9,3553;2,10,3553;2,11,3553;2,12,3553;2,13,3553;2,14,3553;2,15,3553;2,16,3553;3,0,3553;3,1,3553;3,2,3553;3,3,3553;3,4,3553;3,5,3553;3,6,3553;3,7,3553;3,8,3553;3,9,3553;3,10,3553;3,11,3553;3,12,3553;3,13,3553;3,14,3553;3,15,3553;3,16,3553;4,0,3553;4,1,3553;4,2,3553;4,3,3553;4,4,3553;4,5,3553;4,6,3553;4,7,3553;4,8,3553;4,9,3553;4,10,3553;4,11,3553;4,12,3553;4,13,3553;4,14,3553;4,15,3553;4,16,3553 --disable-accelerated-video-decode --service-request-channel-token=9469E58F676BDEF1550E34B4D700CB57 --renderer-client-id=66 --shared-files=v8_natives_data:100,v8_snapshot_data:101
rick 3437 2019 3437 0 4 106685 3916 7 Aug26 ? 00:00:00 /usr/lib/gvfs/gvfsd-network --spawner :1.4 /org/gtk/gvfs/exec_spaw/3
root 15170 2 15170 0 1 0 0 7 16:45 ? 00:00:00 [kworker/7:2]
rick 15441 2019 15527 0 42 347528 234428 7 Aug26 ? 00:00:00 /opt/google/chrome/chrome
rick 15441 2019 15532 0 42 347528 234428 7 Aug26 ? 00:00:00 /opt/google/chrome/chrome
rick 15441 2019 15543 0 42 347528 234428 7 Aug26 ? 00:00:00 /opt/google/chrome/chrome
rick 15441 2019 15553 0 42 347528 234428 7 Aug26 ? 00:00:00 /opt/google/chrome/chrome
rick 15441 2019 21397 52 42 347528 234428 7 15:44 ? 01:20:21 /opt/google/chrome/chrome
rick 15746 15524 21853 0 13 236965 74032 7 Aug26 ? 00:00:00 /opt/google/chrome/chrome --type=renderer --enable-smooth-scrolling --field-trial-handle=14075765731346784657,198534808813688123,131072 --service-pipe-token=B6F0CC243787B18BB0EA42A02C364626 --lang=en-GB --enable-crash-reporter=b0f732a8-ad2f-4a2e-b904-4ab12fecf64e, --extension-process --enable-offline-auto-reload --enable-offline-auto-reload-visible-only --blink-settings=disallowFetchForDocWrittenScriptsInMainFrame=false,disallowFetchForDocWrittenScriptsInMainFrameOnSlowConnections=true --enable-pinch --num-raster-threads=4 --enable-main-frame-before-activation --content-image-texture-target=0,0,3553;0,1,3553;0,2,3553;0,3,3553;0,4,3553;0,5,3553;0,6,3553;0,7,3553;0,8,3553;0,9,3553;0,10,3553;0,11,3553;0,12,3553;0,13,3553;0,14,3553;0,15,3553;0,16,3553;1,0,3553;1,1,3553;1,2,3553;1,3,3553;1,4,3553;1,5,3553;1,6,3553;1,7,3553;1,8,3553;1,9,3553;1,10,3553;1,11,3553;1,12,3553;1,13,3553;1,14,3553;1,15,3553;1,16,3553;2,0,3553;2,1,3553;2,2,3553;2,3,3553;2,4,3553;2,5,3553;2,6,3553;2,7,3553;2,8,3553;2,9,3553;2,10,3553;2,11,3553;2,12,3553;2,13,3553;2,14,3553;2,15,3553;2,16,3553;3,0,3553;3,1,3553;3,2,3553;3,3,3553;3,4,3553;3,5,3553;3,6,3553;3,7,3553;3,8,3553;3,9,3553;3,10,3553;3,11,3553;3,12,3553;3,13,3553;3,14,3553;3,15,3553;3,16,3553;4,0,3553;4,1,3553;4,2,3553;4,3,3553;4,4,3553;4,5,3553;4,6,3553;4,7,3553;4,8,3553;4,9,3553;4,10,3553;4,11,3553;4,12,3553;4,13,3553;4,14,3553;4,15,3553;4,16,3553 --disable-accelerated-video-decode --service-request-channel-token=B6F0CC243787B18BB0EA42A02C364626 --renderer-client-id=5 --shared-files=v8_natives_data:100,v8_snapshot_data:101
rick 17004 15524 17010 0 14 254605 146636 7 Aug26 ? 00:00:03 /opt/google/chrome/chrome --type=renderer --enable-smooth-scrolling --field-trial-handle=14075765731346784657,198534808813688123,131072 --service-pipe-token=B04C26F870675DF1A8643418BED74ECD --lang=en-GB --enable-crash-reporter=b0f732a8-ad2f-4a2e-b904-4ab12fecf64e, --enable-offline-auto-reload --enable-offline-auto-reload-visible-only --blink-settings=disallowFetchForDocWrittenScriptsInMainFrame=false,disallowFetchForDocWrittenScriptsInMainFrameOnSlowConnections=true --enable-pinch --num-raster-threads=4 --enable-main-frame-before-activation --content-image-texture-target=0,0,3553;0,1,3553;0,2,3553;0,3,3553;0,4,3553;0,5,3553;0,6,3553;0,7,3553;0,8,3553;0,9,3553;0,10,3553;0,11,3553;0,12,3553;0,13,3553;0,14,3553;0,15,3553;0,16,3553;1,0,3553;1,1,3553;1,2,3553;1,3,3553;1,4,3553;1,5,3553;1,6,3553;1,7,3553;1,8,3553;1,9,3553;1,10,3553;1,11,3553;1,12,3553;1,13,3553;1,14,3553;1,15,3553;1,16,3553;2,0,3553;2,1,3553;2,2,3553;2,3,3553;2,4,3553;2,5,3553;2,6,3553;2,7,3553;2,8,3553;2,9,3553;2,10,3553;2,11,3553;2,12,3553;2,13,3553;2,14,3553;2,15,3553;2,16,3553;3,0,3553;3,1,3553;3,2,3553;3,3,3553;3,4,3553;3,5,3553;3,6,3553;3,7,3553;3,8,3553;3,9,3553;3,10,3553;3,11,3553;3,12,3553;3,13,3553;3,14,3553;3,15,3553;3,16,3553;4,0,3553;4,1,3553;4,2,3553;4,3,3553;4,4,3553;4,5,3553;4,6,3553;4,7,3553;4,8,3553;4,9,3553;4,10,3553;4,11,3553;4,12,3553;4,13,3553;4,14,3553;4,15,3553;4,16,3553 --disable-accelerated-video-decode --service-request-channel-token=B04C26F870675DF1A8643418BED74ECD --renderer-client-id=8 --shared-files=v8_natives_data:100,v8_snapshot_data:101
We can see it is probably chrome causing the problem.