On Oct 9, 2010, at 18:23, John Obbele wrote: > Hi again ! > > On Sat, Oct 09, 2010 at 05:10:36PM +0200, Axel Simon wrote: >> Yes, that's the notion. mainGUI must be "__safe" because it will >> call back into Haskell land. Once a callback from the mainGUI thread >> is triggered and we're in Haskell land again, GC and all other >> Haskell threads will run. >> >> But I'm not that this explains why we see the space leak without - >> threaded. If your Haskell program does not run then it can't create >> garbage. If it runs, the GC will run. >> >> There is some C code that might behave differently, depending on >> weather we're in -threaded mode or not. I'll check. > > @Axel, sorry to bother you with another tricky question but I've > played with pixbufs in a callback glib function (code attached), > and forcing the GC with System.Mem.performGC seems to be the only > way to avoid a memory issue, when compiled without any > '-threaded' option. > > I'm really puzzled by this behaviour since it shows GHC runtime > would be able to clean the heap, but will not do it unless you > explicitly ask for. >
Ah, ok. Maybe it's because ghc optimizes the callback in a way that it doesn't allocate anything in the heap or not enough to trigger a GC. Mind you, if you allocate a 4MB image and only a 16-byte thunk within Haskell to point to it, it will take a long time until the Haskell heap is full so that a GC is triggered. If you use -threaded then ghc might do something else and generate more garbage. This is what just came to my mind. It might still have a deeper cause. Cheers, Axel > > Well, anyway, as Andy asked, I will try to fix floating > references in the rest of the Gtk objects. I guess using > [0][GObject official hierarchy], hierachy.list and a smart sed > script can help me to speed things up. > > [0]: http://library.gnome.org/devel/gtk/stable/ch01.html > > regards, > /John > > ------------------------------------------------------------------------------ > Beautiful is writing same markup. Internet Explorer 9 supports > standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. > Spend less time writing and rewriting code and more time creating > great > experiences on the web. Be a part of the beta today. > http://p.sf.net/sfu/beautyoftheweb > _______________________________________________ > Gtk2hs-devel mailing list > Gtk2hs-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/gtk2hs-devel ------------------------------------------------------------------------------ Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb _______________________________________________ Gtk2hs-devel mailing list Gtk2hs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gtk2hs-devel
