Menu
▾
▴
Re: [Plplot-general] wingcc Freeze
|
From: John D. <jb_...@bt...> - 2014-03-15 23:03:33
|
Hi Werner Thanks for your input, I will look into a limit on GDI objects being the problem. Kind regards John Sent from my iPad > On 15 Mar 2014, at 10:23, Werner Smekal <wer...@mi...> wrote: > > Hi John, > > using wxWidgets on Windows I sometimes encountered a limit of GDI Objects. Everything you do in the GUI needs a GDI Object - but this is limited to 10000 per process. This could explain your behaviour (works a while and then crashes or freezes). E.g. see here: > > http://stackoverflow.com/questions/9723470/whats-the-upper-limit-on-gdi-objects-for-one-process-in-windows-7 > > I don't know the wingcc driver to well, but maybe it uses always new GDI objects if you call plenv and if you do that hundred times.... > > HTH, > Werner > >> <compose-unknown-contact.jpg> John Duffy 14 March 2014 22:46 >> Hi Alan >> >> Thanks for your comprehensive reply, did you see my second posting regarding the freeze occurring when window events occur? I'm tending to think it is a window event issue in the wingcc code. I did monitor window resources during my program run and freeze, memory usage didn't appear to be a problem. >> >> I will digest your email and do some further diagnosis as you suggest. >> >> I'm using Windows only because I have to at the moment. I intend to migrate to a Unix platform, which I am more familiar with, as soon as possible. >> >> Kind regards >> >> John >> >> Sent from my iPhone >> >> >> ------------------------------------------------------------------------------ >> Learn Graph Databases - Download FREE O'Reilly Book >> "Graph Databases" is the definitive new guide to graph databases and their >> applications. Written by three acclaimed leaders in the field, >> this first edition is now available. Download your free book today! >> http://p.sf.net/sfu/13534_NeoTech >> _______________________________________________ >> Plplot-general mailing list >> Plp...@li... >> https://lists.sourceforge.net/lists/listinfo/plplot-general >> <compose-unknown-contact.jpg> Alan W. Irwin 14 March 2014 22:33 >> >> Hi John: >> >> My guess is you are encountering some sort of memory management issue >> (heap corruption) or memory leak in the wingcc code or in the PLplot >> core library that is triggered by all your iterations. >> >> My bet is on a memory management issue for the combination of >> wingcc and the general PLplot -np option that you are using. My >> impression is that combination does not work as well as it should. For >> example, although results for the wingcc device normally display well >> for me on the Wine platform, they only show "transparent" results >> (just the frame for the window with everything else leaking through >> from the display below) if the -np PLplot option is used. Of course, >> this strange behaviour might just be the result of a Wine bug, but the >> other alternative is some memory management issue with how -np is >> implemented for the wingcc device driver that is creating a wide >> variety of peculiar results on various platforms. >> >> To distinguish whether the problem is in wingcc + the -np option or in >> the PLplot core, what happens if you try the equivalent for the svg >> device? (The -np option is ignored in that case since svg is a >> file-oriented device. However, use the command line options >> >> -fam -fflen 3 >> >> so that each of your plot pages [generated by plenv] will be written >> to a separate file rather than just the first page written to one file >> with the rest of the pages dropped). I also suggest you keep the >> number of iterations small until you get an idea of the disk space >> consumed by all the different svg page files you are going to generate >> by a large number of iterations. >> >> If you do have any trouble with the svg case could you simplify the >> example as much as possible while still demonstrating the issue, and >> then send me that simplified code so I can try it for myself? I would >> be happy to run it here on Linux under valgrind to check for any >> memory management or memory leak issues. Unfortunately, I cannot do >> such a check for wingcc since wingcc is Windows only and valgrind is >> Unix only. >> >> Alan >> __________________________ >> Alan W. Irwin >> >> Astronomical research affiliation with Department of Physics and Astronomy, >> University of Victoria (astrowww.phys.uvic.ca). >> >> Programming affiliations with the FreeEOS equation-of-state >> implementation for stellar interiors (freeeos.sf.net); the Time >> Ephemerides project (timeephem.sf.net); PLplot scientific plotting >> software package (plplot.sf.net); the libLASi project >> (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); >> and the Linux Brochure Project (lbproject.sf.net). >> __________________________ >> >> Linux-powered Science >> __________________________ >> >> ------------------------------------------------------------------------------ >> Learn Graph Databases - Download FREE O'Reilly Book >> "Graph Databases" is the definitive new guide to graph databases and their >> applications. Written by three acclaimed leaders in the field, >> this first edition is now available. Download your free book today! >> http://p.sf.net/sfu/13534_NeoTech >> _______________________________________________ >> Plplot-general mailing list >> Plp...@li... >> https://lists.sourceforge.net/lists/listinfo/plplot-general >> <compose-unknown-contact.jpg> John Duffy 14 March 2014 21:21 >> Hi >> >> I have the following pseudo code which work well until it freezes... >> >> plsdev("wingcc"); >> plspage(0, 0, 1600, 800, 0, 0); >> plspause(0); >> plinit(); >> >> for (...) { >> plenv(); // set new x & y max and min parameters >> plline(); // data to plot >> } >> >> plend(); >> >> Like I say, it works well until it freezes after a few hundred iterations of displaying data. I would appreciate any help in pointers where to look for problems, my code or within the "wingcc" driver. When the code freezes, Windows reports the plotting window as not responding. >> >> Kind regards >> >> John >> >> >> From: Alan W. Irwin <ir...@be...> >> To: John Duffy <jb_...@bt...> >> Cc: "plp...@li..." <plp...@li...> >> Sent: Sunday, 2 February 2014, 18:47 >> Subject: Re: [Plplot-general] Updating Interactive Display with New Data >> >> On 2014-02-02 13:54-0000 John Duffy wrote: >> >> > Hi >> > >> > I would like to use PLplot to display experimental data as it is generated, i.e have the plot updated "live". I have tried a loop construct as per the pseudo code below, but I can only get the plot to update by clicking on mouse button 3. Any help/suggestions would be greatly appreciated. >> > >> > >> > int main() >> > { >> > double x[n]; >> > double y[n]; >> > >> > plsdev("xwin"); >> > >> > >> > plinit(); >> > >> > >> > for (;;) { // Wait for new data and update x & y arrays >> > >> > plenv(...); // Set new x & y ranges >> > plline(...); // Plot new data >> > >> > } >> > >> > plend(); >> > >> > exit(0); >> > >> > } >> >> I suggest you try the -np (no pause between pages) command-line option or >> the equivalent plspause(0) call. We use the -np option a lot in >> our interactive test targets for PLplot so that we don't have to >> be clicking a lot when running those tests. >> >> Alan >> __________________________ >> Alan W. Irwin >> >> Astronomical research affiliation with Department of Physics and Astronomy, >> University of Victoria (astrowww.phys.uvic.ca). >> >> Programming affiliations with the FreeEOS equation-of-state >> implementation for stellar interiors (freeeos.sf.net); the Time >> Ephemerides project (timeephem.sf.net); PLplot scientific plotting >> software package (plplot.sf.net); the libLASi project >> (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); >> and the Linux Brochure Project (lbproject.sf.net). >> __________________________ >> >> Linux-powered Science >> __________________________ >> >> >> ------------------------------------------------------------------------------ >> Learn Graph Databases - Download FREE O'Reilly Book >> "Graph Databases" is the definitive new guide to graph databases and their >> applications. Written by three acclaimed leaders in the field, >> this first edition is now available. Download your free book today! >> http://p.sf.net/sfu/13534_NeoTech >> _______________________________________________ >> Plplot-general mailing list >> Plp...@li... >> https://lists.sourceforge.net/lists/listinfo/plplot-general |
