cpustat periodically dumps out the current CPU utilisation statistics of running processes. cpustat has been optimised to have a minimal CPU overhead and typically uses about 35% of the CPU compared to top. cpustat also includes some simple statistical analysis options that can help characterise the way CPUs are being loaded.
- -h help
- -a calculate CPU utilisation based on all the CPU ticks rather than one CPU
- -c get command name from processes comm field (less expensive on CPU)
- -d strip directory basename off command information
- -D show distribution of CPU utilisation stats at end of run
- -g show grand total of CPU utilisation stats at end of run
- -i ignore cpustat in the statistics
- -l show long (full) command information
- -n specifies number of tasks to display
- -q run quietly, useful with option -r
- -r specifies a comma separated values output file to dump samples into.
- -s show short command information
- -S timestamped output
- -t specifies an task tick count threshold where samples less than this are ignored.
- -T show total CPU utilisation statistics
- -x show extra stats (load average, avg cpu freq, etc)
cpustat 5 5 -gxDST
Load Avg 1.71 1.11 0.88, Freq Avg. 2.92 GHz, 4 CPUs online
7248.5 Ctxt/s, 2444.1 IRQ/s, 1658.1 softIRQ/s, 1.2 new tasks/s, 9 running, 0 blocked
%CPU %USR %SYS PID S CPU Time Task (14:09:46)
73.25 73.25 0.00 31078 S 2 1.94m stress-ng
72.06 70.86 1.20 31079 R 1 1.94m stress-ng
20.36 16.97 3.39 31037 S 0 33.28s /usr/lib/firefox/plugin-container
8.78 7.98 0.80 7027 S 3 42.70s /usr/lib/thunderbird/thunderbird
4.99 3.19 1.80 7134 S 3 1.94m /usr/lib/firefox/firefox
4.79 3.19 1.60 901 S 3 8.06m /usr/bin/X
3.39 2.99 0.40 2250 S 2 3.99m compiz
1.60 0.80 0.80 2375 S 2 1.58m /usr/bin/pulseaudio
1.60 0.00 1.60 31036 S 0 1.12s [kworker/0:2]
0.40 0.40 0.00 5719 S 2 22.10s /usr/lib/gnome-terminal/gnome-terminal-server
0.40 0.40 0.00 2177 S 3 21.25s /usr/bin/ibus-daemon
0.20 0.20 0.00 30774 S 0 1.03s /usr/lib/firefox/plugin-container
0.20 0.00 0.20 493 S 2 0.25s [jbd2/sda3-8]
0.20 0.20 0.00 2206 S 3 3.44s /usr/lib/ibus/ibus-ui-gtk3
0.20 0.00 0.20 6852 S 3 0.24s [kworker/3:1]
0.20 0.20 0.00 2170 S 1 0.25s upstart-dbus-bridge
0.20 0.00 0.20 6806 S 2 12.18s [kworker/u16:3]
192.81 180.64 12.18 Total
Load Avg 1.82 1.14 0.90, Freq Avg. 2.92 GHz, 4 CPUs online
6781.6 Ctxt/s, 2210.8 IRQ/s, 1338.8 softIRQ/s, 0.6 new tasks/s, 2 running, 0 blocked
%CPU %USR %SYS PID S CPU Time Task (14:09:51)
73.40 73.40 0.00 31079 R 1 2.00m stress-ng
72.80 71.40 1.40 31078 S 2 2.00m stress-ng
19.40 17.40 2.00 31037 S 0 34.25s /usr/lib/firefox/plugin-container
15.00 13.80 1.20 7027 S 3 43.45s /usr/lib/thunderbird/thunderbird
5.60 3.40 2.20 901 S 3 8.06m /usr/bin/X
3.60 2.80 0.80 2250 S 2 4.00m compiz
3.20 2.40 0.80 7134 S 3 1.94m /usr/lib/firefox/firefox
1.60 1.20 0.40 2375 S 2 1.58m /usr/bin/pulseaudio
1.00 0.00 1.00 31036 S 0 1.17s [kworker/0:2]
0.20 0.00 0.20 30774 S 0 1.04s /usr/lib/firefox/plugin-container
0.20 0.20 0.00 2244 S 2 1.68s /usr/lib/unity-settings-daemon/unity-settings-daemon
0.20 0.20 0.00 2263 S 2 2.17s /usr/lib/unity/unity-panel-service
0.20 0.20 0.00 770 S 3 1.85s /usr/bin/dbus-daemon
0.20 0.20 0.00 722 S 1 1.14s /usr/lib/accountsservice/accounts-daemon
0.20 0.00 0.20 30780 S 0 2.05s /opt/google/talkplugin/GoogleTalkPlugin
0.20 0.20 0.00 2292 S 0 0.72s /usr/lib/x86_64-linux-gnu/indicator-messages/indicator-messages-service
0.20 0.20 0.00 2300 S 0 0.90s /usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service
197.20 187.00 10.20 Total
Load Avg 1.75 1.14 0.90, Freq Avg. 2.90 GHz, 4 CPUs online
3776.4 Ctxt/s, 1477.4 IRQ/s, 789.0 softIRQ/s, 0.2 new tasks/s, 3 running, 0 blocked
%CPU %USR %SYS PID S CPU Time Task (14:09:56)
74.80 74.80 0.00 31078 S 2 2.06m stress-ng
74.20 74.20 0.00 31079 R 1 2.06m stress-ng
18.80 16.60 2.20 31037 S 0 35.19s /usr/lib/firefox/plugin-container
5.00 4.40 0.60 7027 S 3 43.70s /usr/lib/thunderbird/thunderbird
3.00 1.40 1.60 901 S 3 8.07m /usr/bin/X
2.00 1.60 0.40 2250 S 2 4.00m compiz
1.40 0.60 0.80 2375 S 2 1.59m /usr/bin/pulseaudio
0.80 0.80 0.00 7134 S 3 1.94m /usr/lib/firefox/firefox
0.20 0.20 0.00 30774 S 0 1.05s /usr/lib/firefox/plugin-container
0.20 0.20 0.00 30780 S 0 2.06s /opt/google/talkplugin/GoogleTalkPlugin
0.20 0.00 0.20 31036 S 0 1.18s [kworker/0:2]
0.20 0.00 0.20 30763 S 1 3.39s [kworker/u16:1]
0.20 0.00 0.20 31116 R 2 0.01s ./cpustat
181.00 174.80 6.20 Total
Load Avg 2.01 1.21 0.92, Freq Avg. 2.93 GHz, 4 CPUs online
3227.0 Ctxt/s, 1315.4 IRQ/s, 723.0 softIRQ/s, 0.2 new tasks/s, 2 running, 0 blocked
%CPU %USR %SYS PID S CPU Time Task (14:10:01)
75.80 75.80 0.00 31078 S 2 2.13m stress-ng
74.20 74.00 0.20 31079 R 1 2.12m stress-ng
19.60 18.80 0.80 31037 S 0 36.17s /usr/lib/firefox/plugin-container
2.40 1.60 0.80 901 S 3 8.07m /usr/bin/X
2.20 2.00 0.20 2250 S 2 4.00m compiz
1.60 1.60 0.00 7027 S 3 43.78s /usr/lib/thunderbird/thunderbird
1.40 1.00 0.40 2375 S 2 1.59m /usr/bin/pulseaudio
0.60 0.60 0.00 7134 S 3 1.94m /usr/lib/firefox/firefox
0.20 0.00 0.20 2263 S 2 2.18s /usr/lib/unity/unity-panel-service
0.20 0.00 0.20 3 S 0 0.59s [ksoftirqd/0]
178.20 175.40 2.80 Total
Load Avg 1.93 1.20 0.92, Freq Avg. 2.90 GHz, 4 CPUs online
4781.8 Ctxt/s, 1809.4 IRQ/s, 871.8 softIRQ/s, 0.2 new tasks/s, 3 running, 0 blocked
%CPU %USR %SYS PID S CPU Time Task (14:10:06)
74.00 73.80 0.20 31078 S 2 2.19m stress-ng
72.80 72.60 0.20 31079 R 1 2.18m stress-ng
18.40 17.00 1.40 31037 S 0 37.09s /usr/lib/firefox/plugin-container
6.00 5.60 0.40 7027 S 3 44.08s /usr/lib/thunderbird/thunderbird
5.60 2.80 2.80 901 S 3 8.07m /usr/bin/X
5.00 4.00 1.00 2250 S 2 4.00m compiz
1.60 1.40 0.20 7134 S 3 1.94m /usr/lib/firefox/firefox
1.40 0.60 0.80 2375 S 2 1.59m /usr/bin/pulseaudio
0.60 0.60 0.00 5719 S 2 22.13s /usr/lib/gnome-terminal/gnome-terminal-server
0.40 0.40 0.00 2430 S 1 2.96s nautilus
0.20 0.20 0.00 2263 S 2 2.19s /usr/lib/unity/unity-panel-service
0.20 0.00 0.20 7 S 0 2.33s [rcu_sched]
0.20 0.00 0.20 30780 S 0 2.07s /opt/google/talkplugin/GoogleTalkPlugin
0.20 0.00 0.20 31036 S 0 1.19s [kworker/0:2]
186.60 179.00 7.60 Total
Grand Total (from 5 samples, 25.0 seconds):
%CPU %USR %SYS PID S CPU Time Task (14:10:06)
74.13 73.81 0.32 31078 S 2 2.19m stress-ng
73.33 73.01 0.32 31079 R 1 2.18m stress-ng
19.31 17.35 1.96 31037 S 0 37.09s /usr/lib/firefox/plugin-container
7.28 6.68 0.60 7027 S 3 44.08s /usr/lib/thunderbird/thunderbird
4.28 2.48 1.80 901 S 3 8.07m /usr/bin/X
3.24 2.68 0.56 2250 S 2 4.00m compiz
2.24 1.68 0.56 7134 S 3 1.94m /usr/lib/firefox/firefox
1.48 0.84 0.64 2375 S 2 1.59m /usr/bin/pulseaudio
0.60 0.00 0.60 31036 S 0 1.19s [kworker/0:2]
0.20 0.20 0.00 5719 S 2 22.13s /usr/lib/gnome-terminal/gnome-terminal-server
0.12 0.04 0.08 30780 S 0 2.07s /opt/google/talkplugin/GoogleTalkPlugin
0.12 0.08 0.04 30774 S 0 1.05s /usr/lib/firefox/plugin-container
0.12 0.08 0.04 2263 S 2 2.19s /usr/lib/unity/unity-panel-service
0.08 0.08 0.00 2430 S 1 2.96s nautilus
0.08 0.08 0.00 2177 S 3 21.25s /usr/bin/ibus-daemon
0.04 0.00 0.04 31116 R 2 0.01s ./cpustat
0.04 0.00 0.04 30763 S 1 3.39s [kworker/u16:1]
0.04 0.00 0.04 6852 S 3 0.24s [kworker/3:1]
0.04 0.00 0.04 6806 S 2 12.18s [kworker/u16:3]
0.04 0.04 0.00 2300 S 0 0.90s /usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service
0.04 0.04 0.00 2292 S 0 0.72s /usr/lib/x86_64-linux-gnu/indicator-messages/indicator-messages-service
0.04 0.04 0.00 2244 S 2 1.68s /usr/lib/unity-settings-daemon/unity-settings-daemon
0.04 0.04 0.00 2206 S 3 3.44s /usr/lib/ibus/ibus-ui-gtk3
0.04 0.04 0.00 2170 S 1 0.25s upstart-dbus-bridge
0.04 0.04 0.00 770 S 3 1.85s /usr/bin/dbus-daemon
0.04 0.04 0.00 722 S 1 1.14s /usr/lib/accountsservice/accounts-daemon
0.04 0.00 0.04 493 S 2 0.25s [jbd2/sda3-8]
0.04 0.00 0.04 7 S 0 2.33s [rcu_sched]
0.04 0.00 0.04 3 S 0 0.59s [ksoftirqd/0]
187.17 179.37 7.80 Total
Distribution of CPU utilisation (per Task):
% CPU Utilisation Count (%)
0.00 - 3.79 1086 97.84
3.79 - 7.58 7 0.63
7.58 - 11.37 1 0.09
11.37 - 15.16 1 0.09
15.16 - 18.95 2 0.18
18.95 - 22.74 3 0.27
22.74 - 26.53 0 0.00
26.53 - 30.32 0 0.00
30.32 - 34.11 0 0.00
34.11 - 37.90 0 0.00
37.90 - 41.69 0 0.00
41.69 - 45.48 0 0.00
45.48 - 49.27 0 0.00
49.27 - 53.06 0 0.00
53.06 - 56.85 0 0.00
56.85 - 60.64 0 0.00
60.64 - 64.43 0 0.00
64.43 - 68.22 0 0.00
68.22 - 72.01 3 0.27
72.01 - 75.80 7 0.63
Distribution of CPU utilisation (per CPU):
CPU# USR% SYS%
0 17.55 2.76
1 73.17 0.36
2 77.65 1.68
3 11.00 3.00