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TCL Event Loop Memory Limiation

Posted on 2014-10-02
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Last Modified: 2014-10-17
Hi Experts,

What is the  limitation on the stack size associated with the TCL thread?
I'm facing a consistent problem with "allocation (malloc)" after some time of continuously running script.

I'm using the following initialization for the TCL framework:
	Tcl_FindExecutable(arg[0]);
	m_pTclInterp = Tcl_CreateInterp();
	Tcl_Preserve(m_pTclInterp);

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Thanks.
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Question by:Georges_Antoun
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Expert Comment

by:sarabande
ID: 40363546
allocation with malloc is heap memory. if you have issues it normally is not the absolute heap-size which is violated but that the requested contiguous heap-space could not be provided.

to solve the problem you should try to allocate always moderately sized (say 4k) chunks of memory on the heap which are all freed before a new cycle begins in your code. doing so the heap memory would not get defragmented too much and freed memory could be used again. in your current code you may check the calls to TCL_Preserve whether the memory preserved always is released properly and that the sizes of the allocations would not permanently increase (for example by always doubling the sizes when a dynamic buffer was full).

Sara
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Accepted Solution

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Georges_Antoun earned 0 total points
ID: 40375719
Thank you guys.
We found the problem in a totally different place.
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Author Closing Comment

by:Georges_Antoun
ID: 40386235
The root cause of the problem reported was found somewhere else.
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