On 06/25/2010 17:15, Tijl Coosemans wrote: > On Friday 25 June 2010 19:41:11 Kris Moore wrote: > >> On 06/25/2010 12:37, Tijl Coosemans wrote: >> >>> KDE currently uses polling to detect file and directory changes on >>> FreeBSD, which can use up cpu time (and laptop battery power). The >>> kded4 process seems to make heavy use of this and currently >>> continuously consumes about 5% of my cpu and often causes it to be >>> throttled up by powerd. >>> >>> I've attached a patch that makes KDE use QFileSystemWatcher on >>> FreeBSD which uses kqueue instead of stat. I've been using it for >>> the past few days and it seems to work rather well. >>> >>> One thing I'm not sure about is whether it works with NFS, so it >>> could use some more testing. If you'd like to test it, replace >>> /usr/ports/x11/kdelibs4/files/patch-kio-kio-kdirwatch.cpp with the >>> attached patch and reinstall kdelibs. >>> >> Just built with this patch here. It does greatly improve my kdeinit4 >> processes, went from a constant 8-10% to 0-1%. >> >> However, it does mess up NFS. When browsing my NFS mounts it doesn't >> show any directory/file changes until I manually refresh the view. >> Is this something fixable? >> > It can be fixed in Qt or in KDE. Both already provide polling as a > fallback and it would be easy to add some logic similar to what > devel/gamin does (call statfs(2) on the given path and use kqueue when > MNT_LOCAL is set, polling otherwise). > > For now, you can also add the following to your ~/.kderc: > > [DirWatch] > nfsPreferredMethod=Stat >
Great, that seems to work. I was also able to add it to /usr/local/kde4/share/config/kdeglobals and it seems to take effect as well. This is such a reduction in CPU usage that this patch really should be enabled by default :) -- Kris Moore PC-BSD Software iXsystems _______________________________________________ kde-freebsd mailing list kde-freebsd@kde.org https://mail.kde.org/mailman/listinfo/kde-freebsd See also http://freebsd.kde.org/ for latest information
