A script to set and display affinity of IRQs and Processes
smp_affinity is a perl script that displays processor affinity in a human readable way.
The script has only 2 requirements:
- Linux Kernel
- perl (should be standard among all distributions)
No other module is needed.
To display and set IRQs affinity, the script must be run as root.
- Show affinity of all process with details:
smp_affinity -s - Show process that have non-default affinity:
smp_affinity -s -d - Show process that have consumed more than 30% CPU in average of their lifespan:
smp_affinity --pctcpu=30% - Set affinity of process 1234 to CPUs 0,1,2 and 5:
smp_affinity -P 1234 -C 0-2,5
In its simplest form, smp_affinity will show all processes (and thread) affinity.
The threads are padded with 4 spaces under their main process (thread-leader) and shown with their custom name (if one is set).
$ ./smp_affinity ID Owner Description 0 1 2 3 4 5 6 7 1 root init [3] X X X X X X X X 673 adrien /usr/local/Aventail/AvConnect --app-dir=/home/adrien/.sonicwall -p40255 X X X X X X X X 5564 root /sbin/udevd X X X X X X X X 6636 messageb /usr/bin/dbus-daemon --system X X X X X X X X 6917 root supervising syslog-ng X X X X X X X X 6952 dnsmasq /usr/sbin/dnsmasq -x /var/run/dnsmasq.pid --user=dnsmasq --group=dnsmasq X X X X X X X X 6985 root /usr/sbin/chronyd -f /etc/chrony/chrony.conf X X X X X X X X 7415 root /usr/sbin/sshd -o PidFile=/run/sshd.pid -f /etc/ssh/sshd_config X X X X X X X X 7610 root /usr/sbin/console-kit-daemon --no-daemon X X X X X X X X 7611 root gmain X X X X X X X X 7613 root gdbus X X X X X X X X 7614 root console-kit-dae X X X X X X X X 7617 root vt_thread_start X X X X X X X X
If you add the -s|--statistics option, many 6 more columns will be shown:
- Scheduling class: TS (Time Sharing, default) RR (Round Robin, RealTime) FF (FIFO, RealTime), IDL (IDLE).
- RealTime Priority
- Last CPU where application has run
- %CPU Consumed during the application lifespan
- %MEM Consumed currently (Resident size, the real one)
- State: R (running) S (interruptible wait) D (uninterruptible wait) Z (zombie)
$ ./smp_affinity -s | head ID Owner Description 0 1 2 3 4 5 6 7 1 root TS - 0 0.0 0.0 S init [3] X X X X X X X X 673 adrien TS - 7 0.0 0.0 S /usr/local/Aventail/AvConnect --app-dir=/home/adrien/.sonicwall -p40255 X X X X X X X X 5564 root TS - 3 0.0 0.0 S /sbin/udevd X X X X X X X X 6636 messageb TS - 1 0.0 0.0 S /usr/bin/dbus-daemon --system X X X X X X X X 6917 root TS - 1 0.0 0.0 S supervising syslog-ng X X X X X X X X 6952 dnsmasq TS - 1 0.0 0.0 S /usr/sbin/dnsmasq -x /var/run/dnsmasq.pid --user=dnsmasq --group=dnsmasq X X X X X X X X 6985 root TS - 7 0.0 0.0 S /usr/sbin/chronyd -f /etc/chrony/chrony.conf X X X X X X X X 7415 root TS - 7 0.0 0.0 S /usr/sbin/sshd -o PidFile=/run/sshd.pid -f /etc/ssh/sshd_config X X X X X X X X 7610 root TS - 0 0.0 0.0 S /usr/sbin/console-kit-daemon --no-daemon X X X X X X X X 7611 root TS - 4 0.0 0.0 S gmain X X X X X X X X 7613 root TS - 2 0.0 0.0 S gdbus X X X X X X X X 7614 root TS - 4 0.0 0.0 S console-kit-dae X X X X X X X X 7617 root TS - 6 0.0 0.0 S vt_thread_start X X X X X X X X
If you have a large CPU count, use the --compact option:
[mvconcept@clxap2 smp_affinity]$ ./smp_affinity --compact --statistics --defined-only ID Owner Description 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 595683 adrien TS - 1 78.0 0.1 S /ansys_inc/v201/ansys/ansysbin X | | | | | | | | | X | | | | | | | | | | 595629 adrien TS - 2 78.1 0.1 S /ansys_inc/v201/ansys/ansysbin X | | | | | | | | | X | | | | | | | | | | 595702 adrien TS - 3 78.1 0.1 S /ansys_inc/v201/ansys/ansysbin X | | | | | | | | | X | | | | | | | | | | 595736 adrien TS - 7 78.3 0.1 S /ansys_inc/v201/ansys/ansysbin X | | | | | | | | | | X | | | | | | | | | 595744 adrien TS - 8 78.7 0.1 S /ansys_inc/v201/ansys/ansysbin X | | | | | | | | | | X | | | | | | | | | 595681 adrien TS - 9 78.9 0.1 S /ansys_inc/v201/ansys/ansysbin X | | | | | | | | | | X | | | | | | | | | 595897 adrien TS - 13 79.1 0.1 S /ansys_inc/v201/ansys/ansysbin | X | | | | | | | | | X | | | | | | | | | 595860 adrien TS - 14 79.4 0.1 S /ansys_inc/v201/ansys/ansysbin | X | | | | | | | | | X| | | | | | | | | 595741 adrien TS - 15 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | X | | | | | | | | | |X | | | | | | | | 595885 adrien TS - 19 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | X | | | | | | | | | | X | | | | | | | | 595805 adrien TS - 20 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | X| | | | | | | | | | X | | | | | | | | 595847 adrien TS - 4 79.3 0.1 R /ansys_inc/v201/ansys/ansysbin X | | | | | | | | | X| | | | | | | | | | 595812 adrien TS - 5 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin X | | | | | | | | | |X | | | | | | | | | 595833 adrien TS - 6 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin X | | | | | | | | | | X | | | | | | | | | 595811 adrien TS - 10 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin X| | | | | | | | | | X | | | | | | | | | 595896 adrien TS - 11 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin |X | | | | | | | | | X | | | | | | | | | 595947 adrien TS - 12 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | X | | | | | | | | | X | | | | | | | | | 595904 adrien TS - 16 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | X | | | | | | | | | | X | | | | | | | | 595902 adrien TS - 17 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | X | | | | | | | | | | X | | | | | | | | 595938 adrien TS - 18 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | X | | | | | | | | | | X | | | | | | | | 595917 adrien TS - 21 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | |X | | | | | | | | | X | | | | | | | | 595993 adrien TS - 22 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | X | | | | | | | | | X | | | | | | | | 595928 adrien TS - 23 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | | X | | | | | | | | | X | | | | | | | | 595971 adrien TS - 24 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | X | | | | | | | | | X| | | | | | | | 595893 adrien TS - 25 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | X | | | | | | | | | |X | | | | | | | 595909 adrien TS - 26 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | X | | | | | | | | | | X | | | | | | | 595941 adrien TS - 27 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | X | | | | | | | | | | X | | | | | | | 595891 adrien TS - 31 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | |X | | | | | | | | | X | | | | | | | 595989 adrien TS - 32 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | | | X | | | | | | | | | X | | | | | | | 595948 adrien TS - 36 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | X | | | | | | | | | | X | | | | | | 596015 adrien TS - 37 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | | | X | | | | | | | | | | X | | | | | | 595987 adrien TS - 38 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | X | | | | | | | | | | X | | | | | | 596019 adrien TS - 42 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | X | | | | | | | | | X | | | | | | 595991 adrien TS - 43 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | X | | | | | | | | | X | | | | | | 595981 adrien TS - 44 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | X | | | | | | | | | X| | | | | | 596011 adrien TS - 28 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | | X | | | | | | | | | | X | | | | | | | 596020 adrien TS - 29 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | | X | | | | | | | | | | X | | | | | | | 596022 adrien TS - 30 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | X| | | | | | | | | | X | | | | | | | 595992 adrien TS - 33 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | | | X | | | | | | | | | X | | | | | | | 596023 adrien TS - 34 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | X | | | | | | | | | X| | | | | | | 596035 adrien TS - 35 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | X | | | | | | | | | |X | | | | | | 596077 adrien TS - 39 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | X | | | | | | | | | | X | | | | | | 596038 adrien TS - 40 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | | | X| | | | | | | | | | X | | | | | | 596064 adrien TS - 41 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | |X | | | | | | | | | X | | | | | | 596068 adrien TS - 45 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | X | | | | | | | | | |X | | | | | 596025 adrien TS - 46 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | X | | | | | | | | | | X | | | | | 596072 adrien TS - 47 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | X | | | | | | | | | | X | | | | | 596099 adrien TS - 48 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | X | | | | | | | | | | X | | | | | 596101 adrien TS - 49 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | X | | | | | | | | | | X | | | | | 596100 adrien TS - 50 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | X| | | | | | | | | | X | | | | | 596106 adrien TS - 51 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | |X | | | | | | | | | X | | | | | 596096 adrien TS - 55 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | X | | | | | | | | | |X | | | | 596102 adrien TS - 56 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | X | | | | | | | | | | X | | | | 596107 adrien TS - 60 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | X| | | | | | | | | | X | | | | 596103 adrien TS - 61 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | |X | | | | | | | | | X | | | | 596115 adrien TS - 62 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | | X | | | | | | | | | X | | | | 596110 adrien TS - 66 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | | X | | | | | | | | | | X | | | 596111 adrien TS - 67 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | | X | | | | | | | | | | X | | | 596114 adrien TS - 68 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | | X | | | | | | | | | | X | | | 596108 adrien TS - 52 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | X | | | | | | | | | X | | | | | 596109 adrien TS - 53 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | X | | | | | | | | | X | | | | | 596118 adrien TS - 54 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | X | | | | | | | | | X| | | | | 596105 adrien TS - 57 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | X | | | | | | | | | | X | | | | 596117 adrien TS - 58 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | X | | | | | | | | | | X | | | | 596120 adrien TS - 59 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | X | | | | | | | | | | X | | | | 596112 adrien TS - 63 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | | X | | | | | | | | | X | | | | 596104 adrien TS - 64 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | | X | | | | | | | | | X| | | | 596121 adrien TS - 65 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | | X | | | | | | | | | |X | | | 596119 adrien TS - 69 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | | X | | | | | | | | | | X | | | 596116 adrien TS - 70 79.5 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | | X| | | | | | | | | | X | | | 596113 adrien TS - 71 79.4 0.1 R /ansys_inc/v201/ansys/ansysbin | | | | | | |X | | | | | | | | | X | | |