[X2Go-User] x2goserver causes increase in ksoftirqd/x CPU usage

Rett Walters rettw78 at rtwnetwork.com
Thu Apr 2 16:09:58 CEST 2015


Mihai:

Yes - your right its the systemd unit called x2goserver, and it does appear
to just start x2gocleansessions script.  I will do some testing with older
kernels to see if the problem is still present.

Thanks for the quick response.

Rett Walters



On Wed, Apr 1, 2015 at 3:11 PM, Mihai Moldovan <ionic at ionic.de> wrote:

> Hi Rett,
>
>
> On 01.04.2015 08:38 PM, Rett Walters wrote:
> > I have two machines running Archlinux with x2goserver running from
> > arch repository packages that both exhibit abnormally high CPU usage
> > in ksoftirqd/x (where x=the cpu core #).  Here is an example top
> > output showing the usage while idle - ksoftirqd is always the top user
> > of CPU when the system is idle:
> >
> > [...]
> >
> > If I stop the x2goserver process, the ksoftirqd processes drop down to
> > almost nothing.    This seems to coincide with the 3.18 and 3.19 linux
> > kernel series.
> >
> > Could this be some sort of interaction between x2goserver and the kernel?
>
> What process are you talking about specifically? "x2goserver" as such
> has no daemon process, aside from the "x2gocleansessions" script that is
> meant to cleanup after sessions terminated etc.
>
> If you mean the daemon started via the x2goserver systemd unit, that's
> likely x2gocleansessions. It should be running consistently, but not
> cause high CPU stress due to the fact it's only running its main loop
> every two seconds. Maybe that needs to be raised, but I doubt it.
>
> Did you ever see this behavior change, i.e., did older kernel versions
> not exhibit this behavior?
>
> My Gentoo-based box running 3.19.0 doesn't show this problem. ksoftirq
> is, if at all, causing 0.5% CPU load with x2gocleansessions running. But
> my hardware is, naturally, different from your's, too.
>
>
>
> Mihai
>
>


-- 
Rett Walters
www.linuxpoweruser.com
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