RE: [Tcl-nap-users] Nap Memory Problem

[salah j. <s_...@ya...>]

Thank You very much for your concern.
   
  I hav did the same test 
   
  8 %  nap_info bytes
1348 1323435
 9 %  nap "result= get_gridascii('c:/red.asc')"
::NAP::6474-6474
10 %  nap_info bytes
1312472 1323435
11 %  unset result
12 %  nap_info bytes
1348 1323435
13 % 

  In this test the nap looks like it works perfectly. but again i checked wich84.exe proceess memory usage . the first reading was 12,000 k and after the second time i used the code a bove it was about 30,000 k and after 4 times it was a bout 85,000 k, also i checked memory page file i get almost the same result.
   
  Today i did also some test by allocating NAO objects and after several times the tclsh crashes.
   
  i will try to do the same test on other machines and i will see the result. 
  
Har...@cs... wrote:
                Hi Salah,
   
  The following is a log (using the unreleased version 6.0.0) of creating & freeing a 100 MB array.
  The task manager showed that wish.exe started at 9 MB, went up to 112 MB when the array was allocated & then decreased to 10 MB after the freeing.
  The 1st number produced by “nap_info bytes” shows the number of bytes used by NAOs returned to 2696 after the freeing.
   
  % nap_info bytes
  2696 2696 40092 40146
  % nap "a = reshape(9, {25 1024 1024})"; # create 100 MB array
  ::NAP::18-18
  % nap_info bytes
  104860544 104861500 72228 72884
  % unset a
  % nap_info bytes
  2696 104861500 72220 72884
   
  Hope this helps,
  Harvey
    Harvey Davies, CSIRO Marine and Atmospheric Research,
Private Bag No. 1, Aspendale 3195
E-mail: har...@cs...
Office: 03 9239 4556
Mobile: 04 2241 7563 

    -----Original Message-----
From: tcl...@li... [mailto:tcl...@li...] On Behalf Of salah jubeh
Sent: Friday, 3 March 2006 12:14
To: tcl...@li...
Subject: [Tcl-nap-users] Nap Memory Problem
   
    Hi Guys

     

    I am working with NAP to do some image processing. i am using a nap function "get_gridascii" to read arc grid ASCII files. the size of images ranges from 2 MB to 100 MB and the platform that i am using is WINXP.

     

     I faced a problem such that the TCL shell give me message can not allocate memory. after calling "get_gridascii" several times.

     

    I used windows task manager utility to trace the process memory usage I find that a little a mount is freed after destroying a NAO object, I  did the same test on two PCs and i get the same result on two versions of TCL.

     

    This is how i am using  get_gridascii

     

    nap "get_gridascii('red.ASC')";

    ::NAP::16-16

     

    i used  ::NAP::16-16 in order to free the memory but the memory did not freed.

     

    also i did another test like that 

     

    nap "red=get_gridascii('red.ASC')";

     

    and i used set red "" also i used unset red to free memory but the memory did not freed.

     

    I checked this with another versions like 5.0.3 and 5.0.2  and i get the same result.

     

    finally i made this test with  4.0.1 i get a good result doing the same test ,The memory was freed  BUT I tried to open an image a bout 80 MB. the TCL shell stop responding. this image i was able to create ANO Object out of it with NAP 5.0.5 but i could not do the same with NAP 4.0.1. i did this test a gain twice an i faild to creat  NAO object.

     

    What is the cause of this problem , is it a bug . and how can i free the memory.

     

     

     

     

     

     

     

     

      

     

     

     

     

     

     

     

     

     

     

     

   
      

Best Regard
 
Eng. Salah Al Jubeh

MCP,MCAD,MCSD 



Mobile:00306947192421
  
 


    
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