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Re: cpu total value and top command output

From: Martin Pala
Subject: Re: cpu total value and top command output
Date: Fri, 31 May 2013 13:45:12 +0200

Yes, that's correct.


On May 31, 2013, at 12:23 PM, Asterisk REQ <address@hidden> wrote:

Thanks Martin,

    Ok, in a 1 cpu core, the monit value is the same that command top value, i tested on a single core processor virtual machine and its the same value.
    So, in a 2 cpu cores  monit % cpu vale for a process will be the comand top % cpu / 2, aprox;  the half?? isn´t?

Thanks guys.

El 31/05/2013 11:32, Martin Pala escribió:

monit shows the cpu usage as a share of sum of all available CPU resources - for example if you have 8 cpu cores, the single-threaded process max will be 100 / 8 = 12.5% if it fully utilises 1 cpu core. Multi-threaded process using all cpu cores will take up to 100% cpu (i.e. all cpu resources).

Top shows the cpu usage on single cpu core, hence for example multi-threaded application utilising 8 cpu cores will have up to 800% cpu usage, which is less natural.


On May 31, 2013, at 11:18 AM, Asterisk REQ <address@hidden> wrote:

Hi all!
    A diference exits between monit cpu total value and top value for the same process. For example top show 5.7% CPU and monit a 0.4% CPU TOTAL , why this difference? Is not the same total CPU usage of the process and its children in percent?

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