CPU OverLoad

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Originally Posted by Joaogl

first Shift+I just prints out I

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Press Shift + I while top is running

Ok lets see.. Im only 15 years old so i never learned nothing about linux so sometimes this gets a bit confusing lets see... :D

Quad-Core i think its a CPU with 4 vCores and that yes i have.
Irix mode off no I didnt understood yet do to do it and if i have to do it to the minecraft our what..
cpulimit on minecraft not yet, e didnt understood how to use it.
and the last one the command cat /proc/cpuinfo |grep ^processor return:
processor : 0
processor : 1
processor : 2
processor : 3

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Originally Posted by Joaogl

Quad-Core i think its a CPU with 4 vCores and that yes i have.

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Not necessarily. It could be a Dual-Core, Hyperthreaded CPU. For example, run this more informative command to interrogate the CPU:

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cat /proc/cpuinfo |egrep ^'processor|cpu cores|core id'|sed -e 's|^processor|\nprocessor|'

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On one of my machines, that returns:

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processor      : 0
core id        : 0
cpu cores      : 2

processor      : 1
core id        : 1
cpu cores      : 2

processor      : 2
core id        : 0
cpu cores      : 2

processor      : 3
core id        : 1
cpu cores      : 2

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From that, you can see that I have two physical core ids, and each has two cores: Dual-Core w/Hyperthreading.

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Irix mode off no I didnt understood yet do to do it and if i have to do it to the minecraft our what..

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Have you managed that yet? I think we have been fairly clear on what to try.

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cpulimit on minecraft not yet, e didnt understood how to use it.

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To run it, just get the pid of your minecraft process, then pass that pid to cpulimit, e.g. write a script that looks like this and run it (you may need to change the name of the process and can set the limit to whatever is permitted by cpulimit):

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#!/bin/bash
process=minecraft
usage=40
pid=$(pidof -x $process)
[ -z "$pid" ] && echo "can't find pid of $process" && exit 1
cpulimit --pid $pid --limit $usage

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that will limit the process "minecraft" to 40% cpu utilization, at least in user-space.

Ok lets see, the command return was:

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processor      : 0
core id        : 0
cpu cores      : 4

processor      : 1
core id        : 1
cpu cores      : 4

processor      : 2
core id        : 2
cpu cores      : 4

processor      : 3
core id        : 3
cpu cores      : 4

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now, I didnt managed Irix mode yet becouse Im affright that could do something to my server that I dont want to..


Now the last one, the server is using more than 100% and that is causing lag on the server but if limit that do 40% that could cause even more lag no?

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Originally Posted by Joaogl

now, I didnt managed Irix mode yet becouse Im affright that could do something to my server that I dont want to..


Now the last one, the server is using more than 100% and that is causing lag on the server but if limit that do 40% that could cause even more lag no?

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No. The server is using more than one full CPU.

Irix mode on / off will only affect the top command while it is running.

By default, top shows the CPU% as a % of a single CPU. This is known as Irix mode. So on something like a single processor System, 100% will actually be all the processor in use. On a dual processor system, it will be around about 50% and so on. When running top, pressing Shift + I changes the CPU% display from a single core to the entire processor, which is known as Solaris mode. Exiting top will reset to the default for next time.

I have just learnt that pressing the 1 key when running top shows what each processor is doing.

Let's go! :D

Irix mode off(how can i turn it off on WebAdmin?)
And on top command i turned it off and it shows that the Minecraft process uses 40% Of the CPU.

now... If its using 40% if i use the cpulimit to 50% What difference that makes? I mean it will block the process to only use 50% is that correct?

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Originally Posted by Joaogl

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processor      : 0
core id        : 0
cpu cores      : 4

processor      : 1
core id        : 1
cpu cores      : 4

processor      : 2
core id        : 2
cpu cores      : 4

processor      : 3
core id        : 3
cpu cores      : 4

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Nice, Quad-core it is.

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now, I didnt managed Irix mode yet becouse Im affright that could do something to my server that I dont want to..

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I'm w/elija, you won't hurt anything by playing w/irix mode in top.

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Now the last one, the server is using more than 100% and that is causing lag on the server but if limit that do 40% that could cause even more lag no?

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Don't know, but i would guess it would cause maybe a little more lag in minecraft. Try and see!

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Originally Posted by Joaogl

Irix mode off(how can i turn it off on WebAdmin?)

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No idea, what is WebAdmin? Does it provide a console in a web browser or something? You can use .toprc, I'll bet, like i mentioned in an earlier post.

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now... If its using 40% if i use the cpulimit to 50% What difference that makes?

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10%!

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I mean it will block the process to only use 50% is that correct?

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Well, that's how cpulimit works, as I understand it. Keep in mind what elija said about the percentage reflecting the number of CPUs (4 in your case).