Linux htop / perf top command for check cpu usage

roriscrave · Apr 22, 2020

After use command 'htop', it show this:
But have 2 tfs with high cpu usage, what is the real usage? 78.5 or 52.3?
And about command perf top, what it show?
Obs: Using ubuntu

command htop

command 'perf top'

@Gesior.pl @fabian766 @Lessaire @Infernum

Gesior.pl · Apr 22, 2020

78.5% is main (lowest PID number) process, which contains all other processes 'CPU' as part of it's own 'CPU'.
52.3 + 3.4 + 2.0 = 57.7 - other processes CPU
78.5 - 57.7 = 20.8 - CPU used
In 'main' thread is handled decryption of incoming network packages. I don't know, if you (or TFS authors) added anything else to it, because 20.8% CPU for decryption of packets is very high (should be below 5% when no one is attacking server with packets spam).

In 'htop' you can press F5 to turn 'tree view'. It will show you which process is owner (parent) of which. In this case processes 30462, 30463 and 30464 are child processes of process 30458.

roriscrave · Apr 22, 2020

Gesior.pl said:
78.5% is main (lowest PID number) process, which contains all other processes 'CPU' as part of it's own 'CPU'.
52.3 + 3.4 + 2.0 = 57.7 - other processes CPU
78.5 - 57.7 = 20.8 - CPU used
In 'main' thread is handled decryption of incoming network packages. I don't know, if you (or TFS authors) added anything else to it, because 20.8% CPU for decryption of packets is very high (should be below 5% when no one is attacking server with packets spam).

In 'htop' you can press F5 to turn 'tree view'. It will show you which process is owner (parent) of which. In this case processes 30462, 30463 and 30464 are child processes of process 30458.

I do not know if I understand it very well, the tfs is using 20.8% of the cpu?
and the way it is currently should I be concerned?
I also added about the 'perf' command in the main post, if you can explain it to me, you are very enlightening

edit: I currently put some code in the source that generates .log files so I can see the consumption of the scripts.

Gesior.pl · Apr 22, 2020

TFS is multithread application. On linux threads are counted as processes.

TFS - which run 4 processes (for one server) - is using 78.5% of power of 1 CPU core. Process with lowest PID is 'parent' of 3 'child processes' and htop shows all 4 processes CPU usage as CPU usage of this process.

top will show you just 1 process with name 'tfs' and it will be that process and it's 'CPU %' will show sum of all 4 processes.

Lessaire · Apr 23, 2020

It should be noted that htop is configurable, and the defaults are pretty terrible. Here, I spent two minutes and made this.

But really, since you are an Ubuntu user, do yourself a solid and do this.

Bash:

sudo add-apt-repository ppa:nicolashennion/glances
sudo apt-get update
sudo apt-get install glances

-- glances ppa

Linux htop / perf top command for check cpu usage

roriscrave

Advanced OT User

Gesior.pl

Gesior.pl

Mega Noob&LOL 2012

roriscrave

Advanced OT User

Gesior.pl

Mega Noob&LOL 2012

Lessaire

Omniscient Hypervisor

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