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
