cpu monitor

cpu_monitor_example.log

$ SAMPLE_SIZE=3
DELAY_SECS=1
TOP_APP_NUM=5 # number of apps to sum up

$ /usr/bin/top -s $DELAY_SECS -l $SAMPLE_SIZE -n $TOP_APP_NUM -F -o cpu -stats cpu,pid,command | \
  grep -A$TOP_APP_NUM "%CPU"
%CPU PID    COMMAND
0.0  99989  fish
0.0  99752  mdworker_shared
0.0  99640  CategoriesServic
0.0  99567  writeconfig
0.0  99297  passd
--
%CPU PID    COMMAND
32.4 151    WindowServer
11.9 92892  iTerm2
7.4  0      kernel_task
7.0  215    coreaudiod
5.3  86486  Melodics
--
%CPU PID    COMMAND
40.9 151    WindowServer
13.6 0      kernel_task
11.8 92892  iTerm2
11.5 1      launchd
7.7  215    coreaudiod
$ /usr/bin/top -s $DELAY_SECS -l $SAMPLE_SIZE -n $TOP_APP_NUM -F -o cpu -stats cpu,pid,command | \
  grep -A$TOP_APP_NUM "%CPU" | \
  grep -v CPU
0.0  99640  CategoriesServic
0.0  99567  writeconfig
0.0  99297  passd
0.0  99209  media-indexer
0.0  99117  PrintUITool
--
32.7 151    WindowServer
12.3 92892  iTerm2
7.5  215    coreaudiod
6.7  0      kernel_task
5.3  86486  Melodics
--
37.9 151    WindowServer
12.2 95222  Activity Monitor
12.1 92892  iTerm2
8.5  215    coreaudiod
7.2  86486  Melodics
$ /usr/bin/top -s $DELAY_SECS -l $SAMPLE_SIZE -n $TOP_APP_NUM -F -o cpu -stats cpu,pid,command | \
  grep -A$TOP_APP_NUM "%CPU" | \
  grep -v CPU | \
  grep -v "^--"
0.0  99640  CategoriesServic
0.0  99567  writeconfig
0.0  99297  passd
0.0  99209  media-indexer
0.0  99117  PrintUITool
32.8 151    WindowServer
12.8 92892  iTerm2
7.5  215    coreaudiod
5.5  86486  Melodics
5.1  0      kernel_task
33.0 95222  Activity Monitor
31.4 151    WindowServer
10.4 92892  iTerm2
8.5  372    top
7.5  215    coreaudiod
$ /usr/bin/top -s $DELAY_SECS -l $SAMPLE_SIZE -n $TOP_APP_NUM -F -o cpu -stats cpu,pid,command | \
  grep -A$TOP_APP_NUM "%CPU" | \
  grep -v CPU | \
  grep -v "^--" | \
  awk '{arr[$2]+=$1;arr2[$2]=$3} END {for (key in arr) printf("%s\t%s\n", arr2[key], arr[key])}'
kernel_task	5.7
WindowServer	71.2
coreaudiod	15.5
top	7.4
Melodics	5.6
iTerm2	19.7
Activity	15.8
PrintUITool	0
media-indexer	0
passd	0
writeconfig	0
CategoriesServic	0