kded high cpu usage with knemo 0.4.6-2ubuntu1 with ppp conections

[Silvije]

Binary package hint: knemo

it happens only with ppp connections, I use feisty ;)

[jcfp (jcfp)]

Confirming, same issue here. When knemo is installed, and a ppp(oe) connection exists, 'kded [kdeinit] --new-startup' process takes cpu usage to 100%. Problem does not occur when either knemo is not installed or no ppp connection exists.

Feisty with knemo 0.4.6-2ubuntu1

[Alexey_A (alexeya)]

Confirming. Feisty, knemo 0.4.6-2ubuntu1

[yamal (kubuntu-uhn-noc)]

Version: 0.4.6 (using KDE KDE 3.5.6)
Installed from: Ubuntu Packages
OS: Linux

When knemo is used while a ppp (or pppoe) connection exist, cpu usage of kded is 100% all the time. Without the ppp connection, the problem does not occur; other types of interfaces work fine. Other than the high cpu usage, knemo appears to function orrectly even for the ppp interface.

Reported in Ubuntu as https://bugs.launchpad.net/ubuntu/+bug/102742 against knemo 0.4.6

[Percy Leonhardt (percy-o)]

Hi,

there is already a ticket (https://bugs.kde.org/show_bug.cgi?id=138182) about the high CPU load with the sysbackend. I still cannot reproduce it, some say it depends on VPN connections, others like you say it happens with PPP. I personally can only test PPP and ETH and it works perfect for both types. There were also some suggestions that it only happens with certain (newer) kernels.

Could you please comment on this and maybe test if the current version 0.4.7 still has the bug?

[yamal (kubuntu-uhn-noc)]

Thank you for your quick reponse. I had noticed the other bug, but since it makes no mention of anything ppp/vpn related, and reports only 50-75% cpu usage, I assumed it was a different issue.

Bug still happens in 0.4.7, basically no difference at all; as soon as a ppp connection exists and knemo is running kded uses all cpu, even when there's little or no traffic. Doesn't matter which of the two is started first. Problem indeed only happens with "sys" backend, "nettools" seems fine with very low cpu usage.

System is a 32 bit install on AMD64 with 2 ethernet cards (ppp on eth1) and one wireless network card; kernel is Ubuntu's 2.6.20-15, pppd version 2.4.4, KDE 3.5.6.

Also tried removing all the interfaces from knemorc that are (apparently) there by default but don't exist on my system like eth2,ra0,ra1,wlan1 without any result or effect whatsoever.

[Percy Leonhardt (percy-o)]

Thanks also for your quick response! :-)

I think I will get a live CD of a distribution using a more recent kernel than my Mandriva does and see if I can reproduce this with a PPP connection...

Thanks again! Sometimes a quick and detailed response can push me more to fix a bug than a bunch of votes...

[Percy Leonhardt (percy-o)]

Could you please test

http://www.eris23.de/knemo/knemo-0.4.7-2.tar.bz2

It solves the issue for me.

[yamal (kubuntu-uhn-noc)]

Seems to do the trick here too. When monitoring only the ppp connection, cpu usage of kded stays 0.0% most of the time.
For every other monitored interface (eth0, eth1, ath0, sit0) cpu usage increases by 1.5-2.0% per additional interface. Whether or not a ppp connection exists makes no difference anymore.

Job well done I'd say. Marking as resolved.

[Percy Leonhardt (percy-o)]

Fixed in KNemo 0.4.8

[jcfp (jcfp)]

Fixed upstream in 0.4.8

[Rich Johnson (nixternal)]

Fixed with current sync from Debian (0.4.8-1).

[Andrew-crouthamel (andrew-crouthamel)]

Hello! Sorry to be the bearer of bad news, but this project has been unmaintained for many years so I will be closing this bug.