How can I determine the current CPU utilization from the shell

Question

How can I determine the current CPU utilization from the shell in Linux   For example  I get the load average like so   cat  proc loadavg   Outputs   0 18 0 48 0 46 4 234 30719

User · Answer

You can use top or ps commands to check the CPU usage.

using top : This will show you the cpu stats

top -b -n 1 |grep ^Cpu

using ps: This will show you the % cpu usage for each process.

ps -eo pcpu,pid,user,args | sort -r -k1 | less

Also, you can write a small script in bash or perl to read /proc/stat and calculate the CPU usage.

User · Answer

Linux does not have any system variables that give the current CPU utilization  Instead  you have to read  proc stat several times  each column in the cpu n  lines gives the total CPU time  and you have to take subsequent readings of it to get percentages  See this document to find out what the various columns mean

User · Answer

The command uptime gives you load averages for the past 1  5  and 15 minutes

User · Answer

Maybe something like this   ps -eo pid pcpu comm   And if you like to parse and maybe only look at some processes      bin sh ps -eo pid pcpu comm   awk   if   2  gt  4  print     gt  gt    ps eo test txt

User · Answer

Try this command   cat  proc stat   This will be something like this   cpu  55366 271 17283 75381807 22953 13468 94542 0 cpu0 3374 0 2187 9462432 1393 2 665 0 cpu1 2074 12 1314 9459589 841 2 43 0 cpu2 1664 0 1109 9447191 666 1 571 0 cpu3 864 0 716 9429250 387 2 118 0 cpu4 27667 110 5553 9358851 13900 2598 21784 0 cpu5 16625 146 2861 9388654 4556 4026 24979 0 cpu6 1790 0 1836 9436782 480 3307 19623 0 cpu7 1306 0 1702 9399053 726 3529 26756 0 intr 4421041070 559 10 0 4 5 0 0 0 26 0 0 0 111 0 129692 0 0 0 0 0 95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 369 91027 1580921706 1277926101 570026630 991666971 0 277768 0 0 0 0 0 0 0 0 0 0 0 0 0 ctxt 8097121 btime 1251365089 processes 63692 procs running 2 procs blocked 0   More details   http   www mail-archive com linuxkernelnewbies googlegroups com msg01690 html  http   www linuxhowtos org System procstat htm

User · Answer

You need to sample the load average for several seconds and calculate the CPU utilization from that  If unsure what to you  get the sources of  top  and read it

User · Answer

Try this command     top   http   www cyberciti biz tips how-do-i-find-out-linux-cpu-utilization html

[linux] How can I determine the current CPU utilization from the shell?

Examples related to linux