Large memory leak in plasma

[Thomas Fjellstrom]

On December 18, 2008, Thomas Fjellstrom wrote:
> On December 18, 2008, Thomas Fjellstrom wrote:
> > On December 18, 2008, Thomas Fjellstrom wrote:
> > > On December 18, 2008, Aaron J. Seigo wrote:
> > > > On Thursday 18 December 2008, Thomas Fjellstrom wrote:
> > > > > I have no idea whats causing it.
> > > >
> > > > you and the rest of the people reporting it. ;)
> > > >
> > > > > If it helps, I'm using the latest nvidia binary driver
> > > >
> > > > define "latest"
> > >
> > > Latest beta.
> > >
> > > > > While writing this message, its upped to 129MB after switching some
> > > > > desktops with the pager, and moving the folderview around a little.
> > > >
> > > > can you watch the memory usage as you do these things and try and pin
> > > > it down to exactly what triggers it? e.g. try moving the folderview
> > > > and see if that affects things; but ONLY move the folderview. dont
> > > > switch desktops, give focus to windows, etc. as that will trigger
> > > > chages in the pager and tasks widget.
> > > >
> > > > then try switching desktops with the pager ... swapping widows,
> > > > etc...
> > > >
> > > > having an xrestop running in an always-on-top, on-all-desktops
> > > > konsole window can make this all a bit easier to do.
> > > >
> > > > until we track down *some* culprit, it's pretty difficult to start
> > > > working towards a fix.
> > >
> > > So far as I said, switching desktops and moving a folderview around
> > > made it grow, but regular use (I mostly use the task bars, and the
> > > notifier likes to pop up a lot) causes the same growth.
> > >
> > > > oh, and does this happen if you use the open source driver?
> > >
> > > Don't know, using the opensource driver makes my 8800GTS fairly
> > > useless. I can test it out for a while.. but seems to me if it was a
> > > driver leak, it wouldn't show up as owned by plasma, instead it'd just
> > > make X's virt-mem usage increase.
> >
> > Draging windows and switching dekstops cause plasma to allocate a bunch
> > of pixmaps. I assume its the pager plasmoid? Fresh start and I'm up to
> > 1193 pixmaps, and 50MB in pixmaps.
> >
> > Using both 180.11 and 180.16 nvidia betas. I'll try again with the nv
> > driver in a bit.
>
> Or at least when I see the leak again in the betas.. It can take a while.

Ok, so some news, after running with a fresh svn checkout of kde 4.2, and (for 
sure this time) the 180.16 drivers, plasma is up to 105MB of pixmaps. Its 
slightly strange too, it only started increasing after I stopped playing with 
things trying to get it to allocate more memory.

I've just did a little silly test of recording X memory use in various stages 
of X and kde restart

                      Virt     Res     Shr
Full Dekstop: 629M  318M  9336
Loged out:     201M  131M  7728
X Restarted:  123M  54M    7504
Full Desktop: 496M  195M  7856

Clearly it looks like X isn't freeing some of the ram, though most of it is 
gone.

I'll be testing with the open source nv driver next to see if it also shows 
leaks quite as badly.

-- 
Thomas Fjellstrom
tfjellstrom at strangesoft.net