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

[<Har...@cs...>]

Hi Salah,

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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.

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% nap_info bytes

2696 2696 40092 40146

% nap "a =3D 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

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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=20

-----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

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Hi Guys

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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.

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

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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.

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This is how i am using  get_gridascii

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

::NAP::16-16

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

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also i did another test like that=20

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nap "red=3Dget_gridascii('red.ASC')";

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

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

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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.

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

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Best Regard
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Eng. Salah Al Jubeh

MCP,MCAD,MCSD=20

  <http://saalaah.jeeran.com/salahjubeh.png>=20

Mobile:00306947192421


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