I was wondering how to read total CPU usage of the group of processes. Then I came with very simple solution using just top and awk commands.
At first look at the command below to grasp an idea:
$ LC_ALL=C top -b -n1 -u $(whoami) | \ awk 'NR==7;/chrome/ {print $0;SUM += $9} END \ {printf "Total Google Chrome CPU usage: %.1f%%\n",SUM}' PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 27077 milosz 20 0 1010m 124m 38m S 12.9 1.6 0:07.55 chrome 22581 milosz 20 0 876m 188m 57m S 6.5 2.4 15:59.30 chrome 428 milosz 20 0 919m 63m 23m S 0.0 0.8 0:53.01 chrome 792 milosz 20 0 878m 34m 16m S 0.0 0.4 0:00.83 chrome 801 milosz 20 0 269m 18m 13m S 0.0 0.2 0:00.14 chrome 11069 milosz 20 0 947m 94m 25m S 0.0 1.2 0:13.34 chrome 22535 milosz 20 0 979m 202m 48m S 0.0 2.6 20:10.45 chrome 22540 milosz 20 0 251m 7348 2496 S 0.0 0.1 0:07.24 chrome 22541 milosz 20 0 6236 360 276 S 0.0 0.0 0:00.00 chrome-sandbox 22542 milosz 20 0 290m 21m 15m S 0.0 0.3 0:00.01 chrome 22546 milosz 20 0 306m 6732 780 S 0.0 0.1 0:00.26 chrome 22583 milosz 20 0 923m 89m 16m S 0.0 1.1 2:29.08 chrome 22707 milosz 20 0 1484m 113m 20m S 0.0 1.4 51:18.62 chrome 25371 milosz 20 0 947m 106m 25m S 0.0 1.3 0:12.03 chrome 26796 milosz 20 0 893m 44m 21m S 0.0 0.6 0:00.40 chrome 26943 milosz 20 0 981m 129m 24m S 0.0 1.6 0:04.41 chrome 29679 milosz 20 0 969m 107m 29m S 0.0 1.4 1:36.41 chrome 32655 milosz 20 0 919m 66m 23m S 0.0 0.8 0:45.56 chrome Total Google Chrome CPU usage: 19.4% |
Now extend it a little and create shell script:
#!/bin/sh export LC_ALL=C if [ "$#" -eq "0" ]; then echo "Simple script to display total CPU usage of group of processes" echo "Usage: $0 group1 group2 group3 ..." echo "Example: $0 ^k ako\|blue ^top$" else for group in $*; do top_group=`top -b -n1 -u $(whoami) | awk "\\$12 ~ /$group/ {if (NR>=7) { print \\$0}}"` processes=`echo "$top_group" | awk '{print $12}' | sort | uniq` echo "Group: " $group for process in $processes; do process_escaped=`echo $process | sed 's/\//\\\\\//g'` process_cpu_usage=`echo "$top_group" | awk "/${process_escaped}/ {SUM += \\$9} END {printf \"%.1f%%\",SUM}"` printf "%20s %s\n" "$process" "$process_cpu_usage" done total_group_cpu=`echo "$top_group" | awk "{SUM += \\$9} END {printf \"%.1f%%\",SUM}"` printf "%20s %s\n" "Group total" "$total_group_cpu" done fi |
Sample script output:
$ cpu_group.sh chrome ako\|blue ^ko ^top$
Group: chrome
chrome 18.1%
chrome-sandbox 0.0%
Group total 18.1%
Group: ako|blue
akonadi_contact 0.0%
akonadi_control 0.0%
akonadi_ical_re 0.0%
akonadi_maildir 0.0%
akonadi_maildis 0.0%
akonadiserver 0.0%
bluedevil-helpe 0.0%
bluedevil-monol 0.0%
Group total 0.0%
Group: ^ko
konqueror 0.0%
konsole 12.0%
korgac 0.0%
Group total 12.0%
Group: ^top$
top 3.3%
Group total 3.3% |