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Load average in cpu

on Load Average+ CPU

Understanding CPU load Average On the basis of following variables:

- CPU cores.

- CPU load average.

- CPU load average on the basis of number of CPU.

CPU Cores

  • We can check the number of cpu cores by one of the following commands: $ nproc 4

OR lscpu

$ grep ‘model name’ /proc/cpuinfo | wc -l 4

CPU load average

  • We can check load on the cpu with the following commands: $ cat /proc/loadavg

2.48 1.69 1.42 5/889 10570

$ cat /proc/loadavg

2.48 1.69 1.42 5/889 10570 top - 00:07:16 up 5:36, 1 user, load average: 0.86, 0.78, 0.77 Tasks: 312 total, 1 running, 256 sleeping, 0 stopped, 0 zombie %Cpu(s): 2.7 us, 0.8 sy, 0.0 ni, 96.6 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st KiB Mem : 8033996 total, 1619612 free, 3388332 used, 3026052 buff/cache KiB Swap: 2097148 total, 2097148 free, 0 used. 3859444 avail Mem

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3059 poonam 20 0 3839156 223956 74324 S 3.3 2.8 2:53.46 gnome-shell
2913 poonam 20 0 399424 85528 58908 S 3.0 1.1 1:38.02 Xorg
9269 poonam 20 0 679612 56704 34448 S 2.0 0.7 0:01.05 terminator
8075 poonam 20 0 407236 98308 9112 S 1.3 1.2 2:42.54 plugin_host

$ uptime 00:08:07 up 5:36, 1 user, load average: 0.84, 0.78, 0.78

$ cat /proc/loadavg 0.96 0.82 0.79 1/1269 10197

CPU load average on the basis of number of CPU

Let’s say we have load averages below:

23:16:49 up 10:49, 5 user, load average: 1.00, 0.40, 3.35

On a single core system this would mean:

  • The CPU was fully (100%) utilized on average; 1 processes was running on the CPU (1.00) over the last 1 minute.

  • The CPU was idle by 60% on average; no processes were waiting for CPU time (0.40) over the last 5 minutes.

  • The CPU was overloaded by 235% on average; 2.35 processes were waiting for CPU time (3.35) over the last 15 minutes.

On a dual-core system this would mean:

  • The one CPU was 100% idle on average, one CPU was being used; no processes were waiting for CPU time(1.00) over the last 1 minute.

  • The CPUs were idle by 160% on average; no processes were waiting for CPU time. (0.40) over the last 5 minutes.

  • The CPUs were overloaded by 135% on average; 1.35 processes were waiting for CPU time. (3.35) over the last 15 minutes.