Re: [Texmacs-dev] memory leak

[Gubinelli Massimiliano]

On 19 déc. 08, at 09:42, Joris van der Hoeven wrote:

> On Thu, Dec 18, 2008 at 11:06:04PM +0100, Gubinelli Massimiliano  
> wrote:
> > Not yet. According to the debugging tools there is indeed a steady
> > growth of the allocated memory event in idle state (at much lower  
> > rate
> > than previously) but I cannot trace it back to the qt code.  
> > Apparently
> > the problematic allocations come from the interpose handles
> > (specifically from the call to the function tmg_texmacs_time), are
> > small blocks of 16 bytes which get never released. This does not
> > happens under X11, but I do not still understand why.
>
> Very strange; the routines tmg_texmacs_time () and texmacs_time ()
> only perform a system call and allocate no memory. Could it be that
> Guile is responsable for the non-released memory? Notice that you
> may use Tools -> Test -> Memory information to get some memory  
> statistics,
> when using fast allocation. You may also use the scheme command (gc)
> to do explicit garbage collection.
>
> When you say that tmg_texmacs_time generates small blocks of 16 bytes
> which are not released, can you be more specific and tell which calls
> to tm_new or new might be responsible?


There some figures: with idle texmacs (open on the help page) and  
running for 1 minute I get 66kb of memory allocated half of which is  
due to the following calls

  40 texmacs.bin   66.02 Kb     start
  39 texmacs.bin   66.02 Kb     main ../../src/src/Texmacs/Texmacs/ 
texmacs.cpp:301
  38 texmacs.bin   66.02 Kb     start_guile(int, char**, void (*) 
(int, char**))
  37 libguile.17.dylib   66.02 Kb     scm_boot_guile
  36 libguile.17.dylib   66.02 Kb     scm_with_guile
  35 libguile.17.dylib   66.02 Kb     scm_i_with_guile_and_parent
  34 libguile.17.dylib   66.02 Kb     scm_c_with_continuation_barrier
  33 libguile.17.dylib   66.02 Kb     scm_i_with_continuation_barrier
  32 libguile.17.dylib   66.02 Kb     scm_c_catch
  31 libguile.17.dylib   66.02 Kb     c_body
  30 libguile.17.dylib   66.02 Kb     invoke_main_func
  29 texmacs.bin   66.02 Kb     new_call_back(void*, int, char**)
  28 texmacs.bin   66.02 Kb     TeXmacs_main(int, char**)
  27 texmacs.bin   66.02 Kb     gui_start_loop()
  26 texmacs.bin   66.02 Kb     qt_gui_rep::event_loop() ../../src/ 
src/Plugins/Qt/qt_gui.cpp:199
  25 texmacs.bin   66.00 Kb     qt_gui_rep::update() ../../src/src/ 
Plugins/Qt/qt_gui.cpp:177
  24 texmacs.bin   66.00 Kb     update()
  23 texmacs.bin   66.00 Kb     texmacs_interpose_handler()
  22 texmacs.bin   66.00 Kb      
tm_server_rep::interpose_handler() ../../src/src/Texmacs/Server/ 
tm_server.cpp:304
  21 texmacs.bin   66.00 Kb     exec_pending_commands()
  20 texmacs.bin   66.00 Kb     call(object)
  19 texmacs.bin   66.00 Kb     call_scheme(scm_unused_struct*)
  18 texmacs.bin   66.00 Kb     TeXmacs_call_scm(arg_list*)
  17 libguile.17.dylib   66.00 Kb     scm_internal_catch
  16 libguile.17.dylib   66.00 Kb     scm_c_catch
  15 texmacs.bin   66.00 Kb     TeXmacs_lazy_call_scm(arg_list*)
  14 libguile.17.dylib   66.00 Kb     scm_internal_lazy_catch
  13 libguile.17.dylib   66.00 Kb     scm_c_with_throw_handler
  12 texmacs.bin   66.00 Kb     TeXmacs_call(arg_list*)
  11 libguile.17.dylib   66.00 Kb     scm_call_0
  10 libguile.17.dylib   66.00 Kb     scm_dapply
   9 libguile.17.dylib   66.00 Kb     deval
   8 libguile.17.dylib   66.00 Kb     deval
   7 libguile.17.dylib   66.00 Kb     deval
   6 libguile.17.dylib   33.00 Kb     deval
   5 texmacs.bin   33.00 Kb     tmg_texmacs_time()
   4 texmacs.bin   33.00 Kb     int_to_scm(int)
   3 libguile.17.dylib   33.00 Kb     scm_i_long2big
   2 libgmp.3.dylib   33.00 Kb     __gmpz_init_set_si
   1 libgmp.3.dylib   33.00 Kb     __gmp_default_allocate
   0 libSystem.B.dylib   33.00 Kb     malloc


and the other half is due to  (without showing the uppert part of the  
stack which is the same as before)

   5 libguile.17.dylib   66.00 Kb     deval
   4 libguile.17.dylib   33.00 Kb     scm_difference
   3 libguile.17.dylib   33.00 Kb     scm_i_mkbig
   2 libgmp.3.dylib   33.00 Kb     __gmpz_init
   1 libgmp.3.dylib   33.00 Kb     __gmp_default_allocate
   0 libSystem.B.dylib   33.00 Kb     malloc

this does not happen with X11.

max




> Best wishes, Joris
>
>
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