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Is background priority in VI Properties ignored?


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I ran across this page which basically states that when setting a VI to background priority (lowest) it is deferred to running in normal priority:

http://digital.ni.com/public.nsf/allkb/D6F5480F7F3​E9CAD8625778F00652246

It states this as "known behaviour"? I must say I didn't know that, especially not since several other pages recommending priority level setup explains about background priority without mentioning this "fact". For instance;

http://digital.ni.com/public.nsf/allkb/84081F249CE​F7AB7862569450074168C

http://zone.ni.com/reference/en-XX/help/370622E-01​/lvrtconcepts/deterministic_apps_vi_priorities/

Does any of you know for a fact that setting a VI to background priority have the same effect as setting it to normal priority? On all targets including Real-Time?

Cheers,

Steen

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I'm confused (not unusual). The above article states, "It is known behavior that this setting coerces the priority to normal priority. It is not possible to set a VI priority to anything lower than normal priority from within the VI Properties Window."

So why does the option even exist??

I occassionally used background priority a long time ago when CPUs weren't quite so fast. Was it all just smoke and mirrors or is this a recent "feature"?

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