Agreed. I'm not sure how this bug could be resolved only on the matplotlib side. See if you can make a standalone (pygtk-only) example that demonstrates this bug and send it to their mailing list. Also, if it's possible, try updating pygtk. There was a very similar bug in an earlier version (sorry, I can't find the reference), that was resolved.
Cheers, Mike Eric Firing wrote: > Mátyás János wrote: > >> Hi, >> >> I'm looking for memory leaks in a python application and found leaks in >> matplotlib. The application is graphic intensive. Each time it updates >> the screen, matplotlib allocates another 5-10 megabytes memory for the >> new gtk.gdk.Pixbuf and gtk.gdk.GCX11 while does not free up the buffers >> allocated for the previous content. >> >> > > This sounds to me like a pygtk bug, not a matplotlib bug; a gtk object > is hanging around after its reference has been deleted. What versions of > gtk and pygtk are you using? This sounds dimly familiar. I don't know > enough about gtk and pygtk to help, but I am sure the people who do know > more will want to know the version. > > Eric > > >> I switched on garbage collection debugging with: >> >> import gc >> gc.enable() >> gc.set_debug(gc.DEBUG_LEAK) >> >> and tried to delete the leaking objects: >> >> --- ./lib/matplotlib/backends/backend_gtkagg.py 2008-06-23 >> 04:09:29.000000000 +0200 ++ >> + >> /usr/lib/python2.4/site-packages/matplotlib-0.91.4-py2.4-linux-i686.egg/matplotlib/backends/backend_gtkagg.py >> 2008-10-02 00:05:32.000000000 +0200 @@ -3,6 +3,7 @@ """ >> from __future__ import division >> import os >> +import gc >> >> import matplotlib >> from matplotlib.figure import Figure >> @@ -82,8 +83,17 @@ >> h = int(ren.height) >> pixbuf = gtk.gdk.pixbuf_new_from_data( >> buf, gtk.gdk.COLORSPACE_RGB, True, 8, w, h, w*4) >> - pixmap.draw_pixbuf(pixmap.new_gc(), pixbuf, 0, 0, 0, 0, w, h, >> + g = pixmap.new_gc() >> + pixmap.draw_pixbuf(g, pixbuf, 0, 0, 0, 0, w, h, >> gtk.gdk.RGB_DITHER_NONE, 0, 0) >> + >> + print "XXXXXXXXXX", pixbuf, >> g,pixbuf.__grefcount__,g.__grefcount__ >> + print gc.get_referrers(pixbuf) >> + print gc.get_referrers(g) >> + del pixbuf >> + del g >> + gc.collect() >> + >> if DEBUG: print 'FigureCanvasGTKAgg.render_figure done' >> >> def blit(self, bbox=None): >> >> >> The __grefcount__ values are 1 but the memory is not freed up even after >> gc.collect(). >> >> ------------------------------------------------------------------------- >> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge >> Build the coolest Linux based applications with Moblin SDK & win great prizes >> Grand prize is a trip for two to an Open Source event anywhere in the world >> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >> _______________________________________________ >> Matplotlib-devel mailing list >> Matplotlib-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/matplotlib-devel >> > > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Matplotlib-devel mailing list > Matplotlib-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-devel > -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
