LabVIEW Run Time Modifying Windows Sleep Timer

[Tonythetiger]

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

[Karunya_R]

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?