Kernel CPU Utilization

Kernel CPU Utilization

[Stephen Brennan]

Hello all,

I was wondering if anyone had some information on how CPU time used by the
kernel is accounted for, e.g. in top or htop. I would imagine that kernel code
running in process code would be "billed" toward that process. What about kernel
worker threads (for example, work_structs queued for later)?

My overall goal is that I'm doing some large-scale network emulation, and I want
to ensure that the kernel is not using too much CPU time, otherwise the CPU
overhead may be messing with the results.

Thanks,
Stephen

Kernel CPU Utilization

[Ozgur Karatas]

21.04.2017, 19:19, "Stephen Brennan" <stephen@brennan.io>:
> Hello all,

Hello,

> I was wondering if anyone had some information on how CPU time used by the
> kernel is accounted for, e.g. in top or htop. I would imagine that kernel code
> running in process code would be "billed" toward that process. What about kernel
> worker threads (for example, work_structs queued for later)?
>
> My overall goal is that I'm doing some large-scale network emulation, and I want
> to ensure that the kernel is not using too much CPU time, otherwise the CPU
> overhead may be messing with the results.

I written to the code for myself, you can use and develop this code (open source).

https://github.com/mueddib/cpustat

> Thanks,
> Stephen

Regards,

Ozgur

Kernel CPU Utilization

[Ozgur Karatas]

> 21.04.2017, 19:19, "Stephen Brennan" <stephen@brennan.io>:
> ?Hello all,
>

Hello,

> ?I was wondering if anyone had some information on how CPU time used by the
> ?kernel is accounted for, e.g. in top or htop. I would imagine that kernel code
> ?running in process code would be "billed" toward that process. What about kernel
> ?worker threads (for example, work_structs queued for later)?
>
> ?My overall goal is that I'm doing some large-scale network emulation, and I want
> ?to ensure that the kernel is not using too much CPU time, otherwise the CPU
> ?overhead may be messing with the results.

I written to the code for myself, you can use and develop this code (open source).

https://github.com/mueddib/cpustat

> ?Thanks,
> ?Stephen

Regards,

Ozgur

Kernel CPU Utilization

[Mulyadi Santosa]

On Saturday, April 22, 2017, Ozgur Karatas <mueddib@goosey.org> wrote:

>
> > 21.04.2017, 19:19, "Stephen Brennan" <stephen@brennan.io <javascript:;>
> >:
> >  Hello all,
> >
>
> Hello,
>
> >  I was wondering if anyone had some information on how CPU time used by
> the
> >  kernel is accounted for, e.g. in top or htop. I would imagine that
> kernel code
> >  running in process code would be "billed" toward that process. What
> about kernel
> >  worker threads (for example, work_structs queued for later)?
> >
> >  My overall goal is that I'm doing some large-scale network emulation,
> and I want
> >  to ensure that the kernel is not using too much CPU time, otherwise the
> CPU
> >  overhead may be messing with the results.
>
> I written to the code for myself, you can use and develop this code (open
> source).
>
> https://github.com/mueddib/cpustat
>
> >  Thanks,
> >  Stephen
>
> Regards,
>
> Ozgur
>
>
Hi

Very likely it is accounted for soft interrupt, hard interrupt and system
time

If vm involved, steal time shall be accounted to


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-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
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