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LabVIEW Run Time Modifying Windows Sleep Timer

Hi fellow LabVIEW Programmers,
 
I have a very interesting issue that is occuring in my test system.  When I run any kind of LabVIEW exe, it seems the LabVIEW run time edition changes properties of windows. One of the properties that seems to be changing is windows sleep timer/function,  which sets the amount of time it takes between doing tasks.    When I boot up the computer every program works normally, when I run a LabVIEW exe, even a simple counter exe, then close the code, windows will do certian tasks 4 times fasters until the computer is rebooted.  I have one program that sends messages over USB and once the Labview EXE is ran, the wait between sending messages over USB is reduced by a factor of 4, so it looks like I have 4x the byte bandwidth.
 
I would like to know what is going on when I run LabVIEW run time.  What hooks are being called, what DLL or  memory flushes are occuring when a EXE is called.  I dont know much about windows API programming, but i know it an affect between labview and windows.
 
 
I currently using  LabVIEW 7.1.1 runtime engine
NI-GBIP 2.5 Full
NI-VISA 4.2 Full
Installed on Windows XP Professional SP2+
The program is being run on a ToughBook CF-29,  but will happen on any computer
 
If any one can point out a cause or what might be happening that would be wonderful
 
Thanks
 
Eric
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Hi Eric,

Your problem is interesting and unusual. You had stated that certain tasks speed up 4x. Can you please specify which tasks they are?


Warm regards,
Karunya R
National Instruments
Applications Engineer
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