Xorg and memory.
lazarus / 8-Other

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mrdebug · 2008-01-28 10:45

I wrote a simple program for linux. This is a form with a large clock
with a few pictures. PC where I run it does not have the swap
partition. During the day xorg consumes all free memory available. At
this point, the program slows down a lot. This malfunction does not
happen on a PC with memory swap.
What is wrong?

Sorry for my bad English.

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Ñuño_Martínez · 2008-01-28 11:55

As I understood there's nothing wrong. Your program is using a lot of
memory, that's all. Try to reduce the memory needs (images needs a lot
of memory) and/or add the swap partition to the system.

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mrdebug · 2008-01-30 15:26

I do not understand what happens. My program and Xorg in 5 hours use
all available RAM. I attach the output of the programme.
Could you help me to interpret? I do not understand the lines
./Include/customform.inc.

Code: [Select]
sintesi@TerminaleMaster:~/FrontEnd32$ sudo ./FrontEnd32
Heap dump by heaptrc unit
88190 memory blocks allocated : 7926782/8199304
88169 memory blocks freed     : 7925411/8197896
21 unfreed memory blocks : 1371
True heap size : 2752512
True free heap : 2749696
Should be : 2749928
Call trace for block $B73584D8 size 13
  $080631FF
  $080911E5  TTCPHTTPDAEMON__EXECUTE,  line 63 of UThHTTPServer.pas
  $080B3737
Call trace for block $B73582F8 size 16
  $0806D2FF
  $080AF6C7
  $082F30A2  TBLOCKSOCKET__SETLINGER,  line 2474 of blcksock.pas
  $080911C3  TTCPHTTPDAEMON__EXECUTE,  line 62 of UThHTTPServer.pas
  $080B3737
Call trace for block $B73582F8 size 16
  $0806D2FF
  $080AF6C7
  $082F30A2  TBLOCKSOCKET__SETLINGER,  line 2474 of blcksock.pas
  $080911C3  TTCPHTTPDAEMON__EXECUTE,  line 62 of UThHTTPServer.pas
  $080B3737
Call trace for block $B73593D8 size 16
  $08077158
  $08077197
  $080A173A  THAGGIORNADATAORA__CREATE,  line 27 of
UThAggiornaDataOra.pas
  $08087376  TMAINFORM__FORMCREATE,  line 337 of TFFrontEnd32.pas
  $0807BCA9  TCUSTOMFORM__DOCREATE,  line 644 of
./include/customform.inc
  $0807D686  TCUSTOMFORM__CREATE,  line 1364 of
./include/customform.inc
  $08083E62  TAPPLICATION__CREATEFORM,  line 1607 of
./include/application.inc
  $0805C31F  main,  line 19 of FrontEnd32.lpr
Call trace for block $B75A8E58 size 60
  $08067852
  $08087376  TMAINFORM__FORMCREATE,  line 337 of TFFrontEnd32.pas
  $0807BCA9  TCUSTOMFORM__DOCREATE,  line 644 of
./include/customform.inc
  $0807D686  TCUSTOMFORM__CREATE,  line 1364 of
./include/customform.inc
  $08083E62  TAPPLICATION__CREATEFORM,  line 1607 of
./include/application.inc
  $0805C31F  main,  line 19 of FrontEnd32.lpr
  $082FD66D
Call trace for block $B7364A98 size 28
  $08067852
  $082DF5C3
  $082DF36F
  $0806B4A4
  $082FD66D
Call trace for block $B7355418 size 12
  $08067852
  $082DF36F
  $0806B4A4
  $082FD66D
Call trace for block $B75A16F8 size 28
  $08067852
  $082B6F1C
  $0806B4A4
  $082FD66D
sintesi@TerminaleMaster:~/FrontEnd32$
[/code]

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mrdebug · 2008-01-31 10:21

I think I have understood. The fault is xorg, it consumes increasingly
ram without free as long as the program is active.


How can I do to resolve this problem?

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Almindor · 2008-01-31 17:21

It's not xorg. You have a leak somewhere, as explained by the output
you pasted. Look at those methods. It seems to me you're creating
threads but not freeing them or something.

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Marc · 2008-02-01 10:43

not freeing threads won't hog xorg. However not freeing images will.
So how are you showing your images.
(last year I made a similar clock running as demoapp on some computer
fair we were attending and it ran each day from 10-17 without probs)