TestStand 3.1 Report Memory Leak

Hi everyone,
I been looking at the memory usage of my TestStand code lately. I noticed I have a memory leak with On The Fly Reporting using XML report file. I'm currenlty using labview 7.1.1 and TestStand 3.1f for development. I came about this program from seeing test station go to a snails crawl. The program starts out around 100MB and will keep growing using up all the systems memory, the largest I seen was 500MB. What is happening is the testers like to keep the on the fly report screen up during the test and not view the execusion window. At the end of each run the program will grow 10MB to 30MB. I know the problem can be solved by turning off on the fly reporting, but I would like to try find a programing option first.
I have looked at the other forum entries about:
Turning off database collection
Editing model options : ModelOptions.DiscardUnusedResults = True and Parameters.ModelOptions.NumTestSockets = 1
Adjusted the array size of the report to 300
None of the options seem to have worked for me, most the post say move to teststand 3.1 cause it an 3.0 issue.
I was wondering if there are any other options to try in teststand, or any way to turn off/close IE to release memory between tests.
I'm currently running the code on Windows XP SP2
IE6/IE7 depending on the test station
P4 or Centrino with 512MB to 1GB of ram
The GUI window is a modifed example of the basic VI EXE that calls teststand
The code is installed using labview and Teststand deployment builders, so the test machine are using runtime labview 7.1.1 and runtime TestStand 3.1
Thanks to any one who can offer alittle extra help on the topic

Actually the reports are XML not HTML.
There are alot of pass steps, usualy after a couple of failed steps, the sequence will terminate.
The memory leak seem to exaggerated, since the technicians like to view the Reports Tab instead of Execution Tab when running program. If the operator keeps the view on the execution tab during the program, the report screen is not being updated, so less memory is taken up. Since the techs like to keep the report screen up during the entire test, the xml file constantly being update and the program increases +50MB after the first run.   So turning off Reports on the fly, they can not view the report during the test and the memory usuage stays low.
I do not see a leak at all if I do not click on the reports tab, and the leak seems to only happen with XML files, TXT and HTML reports do not cause a memory leak, even when viewed on the fly for the entire test.   I wanted to keep XML-expandable cause it easier to see what sequences failed then scanning through the entire report.
I'm using Test UUT call up the test.    The executable terminated if you press the exit button on the executable. After test is finished, the standard Pass/Fail comes up then the standard enter UUT serial number comes up.
I'm including the reports option INI I use .
Thanks for you help in this matter, sorry being little late with replying.
Attachments:
report.ini ‏4 KB

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Wait for Flag / Set Flag
Separate Views from Implementation for Strict Type Defs
Solved!
Go to Solution.
Attachments:
New Thread Memory Leak.zip ‏14 KB

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Certified LabVIEW Architect
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Separate Views from Implementation for Strict Type Defs

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Our organization develops E-learning content with Captivate 1
for various customers, mostly Fortune 100 companies.
This bug severely limits our ability to deliver content to
our customers.
Steps to reproduce
1. Using Captivate 1.01.1418, create a “blank
movie” with default settings.
2. Use the “Record” button and begin recording a
full-motion movie for about 2-4 minutes. For the purposes of this
bug, it is enough to record a user typing random text in a Notepad
window resized to fit in the default 800x600 window.
3. After recording the full-motion movie, publish the
Captivate movie as a “Flash (SWF)” movie, using default
settings (making sure that the “export HTML” checkbox
is selected).
4. Open the published movie’s HTML file with a host
browser, making sure that the browser is using the Flash 9.0
player.
5. While the movie is playing, watch the memory usage of the
browser process using Windows Task Manager, and you will see that
the values of the “Mem Usage” and “VM Size”
counters keep increasing until the system becomes unusable.

Also see:
http://www.adobe.com/cfusion/webforums/forum/messageview.cfm?forumid=44&catid=184&threadid =1249396&enterthread=y
Flash is generating around 300 page faults per second per
flash animation
Performance
issues: page faulting
Flash is also generating around 300 page faults per second.
This can be observed by following the instructions in the link
above for displaying page faults in the system task manager.

CVI dll to read XML file causes memory leak

Hello,
I am facing a memory leak issue when I execute a dll created using CVI to read a XML file.
Each iteration of the step is taking around 200k of memory.
Short description of the code:
Basically I am using a function created in CVI to read from an XML file by tag which 2 attributes: command and the response;
int GetCmdAndRsp(char XML_File[MAX_STR_SIZE], char tag[MAX_STR_SIZE], char Command[MAX_STR_SIZE], char Response[MAX_STR_SIZE], char ErrorDescription[MAX_STR_SIZE])
inputs:
- XML_File_path;
- tagToFind;
ouputs:
- Command;
- Response;
- Error;
Example:
XMLFile:
<WriteParameter Command="0x9 %i %i %i %i %i" Response = "0x8 V %i %i %i %i"/>
Execution:
error = GetCmdAndRsp("c:\\temp\\ACS_Messages.xml" ,"WriteParameter", cmd, rsp, errStr)
output:
error = 0
cmd = "0x9 %i %i %i %i %i"
rsp = "0x8 V %i %i %i %i"
errStr = "Unkown Error"
Everything is working correctly but I have this memory leak issue. Why am I having such memory consumption?? Is it a TestStand or CVI issue??
Each iteration I am loading the file, reading the file and discarding the file.
Attached you can find the CVI project, a TestStand sequence to test (ReadXML_test2.seq) and an example of a XML file I am using.
Please help me here.
Thaks in advance.
Regards,
Pedro Moreira
Attachments:
ReadXML_Prj.zip ‏1826 KB

Pedro,
When a TestStand step executes, its result will be stored by TestStand which will be later used for generating reports or logging data into database.
You are looking at the memory (private bytes) when the sequence file has not finished execution. So, the memory you are looking at, includes the memory used by TestStand to store result of the step. The memory used for storing results will be de-allocated after finishing the sequence file execution.
Hence, we dont know if there is actual memory leak or not. You should look at the memory, before and after executing sequence file instead of looking in between execution.
Also, here are some pointers that will be helpful for checking memory leak in an application:
1. TestStand is based on COM and uses BSTR in many function. BSTR caches the memory and because of the behavior, sometime you might get false notion of having memory leak. Hence, you need to use SetOaNoCache function OR set the OANOCACHE=1 environment variable to disable caching.
2. Execute the sequence file atleast once before doing the actual memory leak test. The dry run will make sure all static variables are initialized before doing memory leak test.
3. Make sure that the state of system or application is same when considering the Private bytes. Ex: Lets say ReportViewControl is not visible before you start executing sequence file. Then you note down the private bytes and then execute the sequence file. After finishing execution, make sure you close the ReportViewControl and then note down the private bytes once again to check if memory is leaked or not.
4. If there exists memory leak as you specified, it is possible that the leak is either in TestStand, or in your code. Make sure that your code doesn't leak by creating a small standalone application (probably a console application) which calls your code.
Detecting memory leaks in CVI is better explained in
http://www.ni.com/white-paper/10785/en/
http://www.ni.com/white-paper/7959/en/
- Shashidhar

TestStand 3.1 Report Memory Leak

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