set the benchmarking VI to "time critical priority",

[marconi2005]

how i can  set the benchmarking VI to "time critical priority",

[altenbach]

Go to "File...VI properties...Execution". You'll find it. 😉

Be aware that time-critical priority is usually not a very good idea, especially for lenghty calculation, because it can starve all other processes running on the computer. (For example, I would loose my wireless internet connection).

[marconi2005]

thank you altenbach in another thread you write about control times smaller then 1 ms. I have a board 6023E and i need goode precision it is possible and how i can have tis precision

[altenbach]

You just setup a DAQ task and the desired timings will be handled by the board timers. You would not use single point acquisition in a software timed loop anyway. Your software loop does not need to be deterministic, just get the buffered data from the board at somewhat regular intervals.

If you need to run a software control loop deterministically at <1ms, you would need LabVIEW RT or most likely FPGA. This is not something for low-cost hardware running on a multipurpose OS.

What exactly are you trying to do?

[marconi2005]

I want make time resolved photoluminescense and for this i have a pulsed laser with trigger and i need put a delay after laser pulsed and i only later  can begin to measure . This delay is smaller than 1ms