On Mon, Feb 15, 2021 at 7:14 AM Сучасні Системи Безпеки <grino....@gmail.com>
wrote:
>
>
> it is a clean server and its doing nothing right now
>
> why is so high % using acpi_cpu_idle_mwait ?
>
If my understanding is correct: The idle process is a 'fake' process used
to count CPU time spent in idle mode (ie: doing nothing).
Here is an example from one of my server:
# top -b | head -n 7
last pid: 1733; load averages: 0.00, 0.00, 0.00 up 15+00:38:42
09:20:37
62 processes: 1 running, 58 sleeping, 3 zombie
CPU: 0.4% user, 0.0% nice, 0.1% system, 0.0% interrupt, 99.5% idle
Mem: 120M Active, 17G Inact, 95G Wired, 11G Free
ARC: 54G Total, 12G MFU, 40G MRU, 1312K Anon, 528M Header, 1720M Other
49G Compressed, 112G Uncompressed, 2.29:1 Ratio
Swap: 100G Total, 100G Free
=> Notice the 99.5% idle showing my system is doing nothing.
And the same top command as your on this system:
# top -SHb | tail -n 20
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
11 root 155 ki31 0B 512K CPU16 16 358.9H 100.00%
idle{idle: cpu16}
11 root 155 ki31 0B 512K CPU22 22 358.9H 100.00%
idle{idle: cpu22}
11 root 155 ki31 0B 512K CPU1 1 358.9H 100.00%
idle{idle: cpu1}
11 root 155 ki31 0B 512K CPU0 0 358.8H 100.00%
idle{idle: cpu0}
11 root 155 ki31 0B 512K CPU26 26 358.8H 100.00%
idle{idle: cpu26}
11 root 155 ki31 0B 512K CPU20 20 358.8H 100.00%
idle{idle: cpu20}
11 root 155 ki31 0B 512K CPU18 18 358.8H 100.00%
idle{idle: cpu18}
11 root 155 ki31 0B 512K CPU3 3 358.8H 100.00%
idle{idle: cpu3}
11 root 155 ki31 0B 512K CPU24 24 358.8H 100.00%
idle{idle: cpu24}
11 root 155 ki31 0B 512K CPU30 30 358.8H 100.00%
idle{idle: cpu30}
11 root 155 ki31 0B 512K CPU7 7 358.8H 100.00%
idle{idle: cpu7}
11 root 155 ki31 0B 512K CPU23 23 358.8H 100.00%
idle{idle: cpu23}
11 root 155 ki31 0B 512K CPU28 28 358.8H 100.00%
idle{idle: cpu28}
11 root 155 ki31 0B 512K CPU8 8 358.8H 100.00%
idle{idle: cpu8}
11 root 155 ki31 0B 512K CPU11 11 358.8H 100.00%
idle{idle: cpu11}
11 root 155 ki31 0B 512K CPU15 15 358.8H 100.00%
idle{idle: cpu15}
11 root 155 ki31 0B 512K CPU5 5 358.8H 100.00%
idle{idle: cpu5}
11 root 155 ki31 0B 512K CPU6 6 358.8H 100.00%
idle{idle: cpu6}
Do you have a too high CPU power consumption in this idle state ?
Regards,
Olivier
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