[KDE 3.1.1] kded.exe incessantly browses thru file system whenidling - high cpu usage for nothing

[Ralf Habacker]

Hi,


> The first symptom was a high CPU usage of ~30% when KDE just sat on
> the screen idling. Looking into that, I found out piece by piece:
>
> 	1) AntiVir Guard consumed ~10% kded.exe the rest; Antivir
> could be turned off. Its statistics showed...
> 	2) a constant flurry of file accesses in the
> c:\cygwin\opt\kde3 tree.

thanks you for pointing it out.

>
> You can find a series of 2500 entries at my website (about 2
> complete cycles):
> http://straw.gmxhome.de/samples/kde-cygwin/kde-filemon1.log.txt
>
> ********************************
>
>
> AFAICT the same subtrees are re-visited endlessly at top speed<g>
> consuming ~20% of CPU power (1GHz P-III) :-<<
>

kded scans directories for new or changed files.
You can get more informations if you do an strace on an running kded.exe.
Try the following sequence (you need an installed grep and gawk) :

strace  --pid=`ps -ea | grep kded | gawk '{print $1 }'`| gawk '$6 ~
/^[a-zA-Z0-9:]+$/ { print $0 }'

On my system I got the following repeated output

 1019 1416425 [main] kded 2328 lstat64: entering
  929 1425820 [main] kded 2328 lstat64: entering
  916 1435174 [main] kded 2328 lstat64: entering
 3573 1451222 [main] kded 2328 ioctl: fd 4, cmd 4004667F
  135 1451538 [main] kded 2328 ioctl: returning 0
  739 1953313 [main] kded 2328 lstat64: entering
  745 1962823 [main] kded 2328 lstat64: entering
  728 1971543 [main] kded 2328 lstat64: entering
 1062 1980927 [main] kded 2328 lstat64: entering
  790 1989464 [main] kded 2328 lstat64: entering
  754 1998708 [main] kded 2328 lstat64: entering
 1323 2008086 [main] kded 2328 lstat64: entering
  612 2019817 [main] kded 2328 lstat64: entering
  913 2028319 [main] kded 2328 lstat64: entering
  974 2037425 [main] kded 2328 lstat64: entering

If you get a different output, please let me know.

Ralf