[Scilab-users] Is this a known bug?

[Tim Wescott]

Thanks Samuel and Jan.  I've submitted a bug, #14310,
http://bugzilla.scilab.org/show_bug.cgi?id=14310.  We'll see what
happens, I guess.

On Mon, 2015-12-21 at 16:10 +0100, Samuel Gougeon wrote:
> Hi Tim,
> 
> Same memory drift with Scilab 5.5.2 and 6.0-a2 on win7_x64 is
> observed.
> plot2d() is clearly involved, since further tests show that
> r = rand(1, 5000, "n"); 
> for n = 1:10000; 
>     clf; 
>     plot2d(r(1,:) , r(1,:)); 
> end
> already leaks, and apparently faster than when encapsulated in
> graphalot(), while
> r = rand(1, 5000, "n"); 
> for n = 1:10000; 
>     clf; 
> end
> 
> does not.
> Hope this will help debugging.
> Memory linkage of plot2d() is not yet reported on bugzilla.
> 
> Regards
> Samuel Gougeon
> 
> Le 21/12/2015 06:37, Tim Wescott a écrit :
> 
> > I'm running scilab-5.5.0 on Ubuntu 14.04.
> > 
> > When I run the attached script and then run "graphalot" for a while,
> > Scilab's memory usage climbs monotonically.  What is actually getting
> > plotted doesn't seem to make a difference -- I just did the particular
> > plots seen there because it's fun.
> > 
> > I'm seeing this in a rather large, rather graphics-intensive script I'm
> > using.  If I let the thing go unattended too long then Scilab slows to a
> > crawl and takes my computer with it -- I suspect that if I were willing
> > to wait for geologically significant amounts of time I could stop
> > Scilab, but I usually end up just cringing and whining, then resetting
> > the computer.
> > 
> > (I'm not sure what would happen in Windows, or if there's a better way,
> > under Linux, to make it not drag the rest of the world down.  I just try
> > not to let the problem happen in the first place).
> > 
> > I searched the bugbase for it, but my ability to find good search terms
> > is usually far better in hindsight than actual use.  So -- is this a
> > known bug, or should I file a bug report?
> > 
> > If it's known, has it been fixed?  In what version?
> > 
> > Here's the script, in case file attachment doesn't work on the list:
> > 
> > function graphalot()
> >     for n = 1:10000; 
> >         bob = rand(1, 5000, "n"); 
> >         r = flts(bob, [%z^2 - 1; 0.5 * %z] / (%z^2 - 1.95*%z + 0.999)); 
> >         scf(0); 
> >         drawlater(); 
> >         clf; 
> >         plot2d(r'); 
> >         ssz = stacksize(); 
> >         xtitle(sprintf("iteration #%d, stack used %d", n, ssz(2))); 
> >         drawnow(); 
> >         scf(1); 
> >         clf; 
> >         drawlater(); 
> >         plot2d(r(1, :), r(2, :), frameflag = 3, rect = [-150, -150, 150,
> > 150]); 
> >         drawnow(); 
> >     end
> > endfunction
> > 
> 

-- 

Tim Wescott
www.wescottdesign.com
Control & Communications systems, circuit & software design.
Phone: 503.631.7815
Cell:  503.349.8432