Why These two while-loop can not run parallelly ?

[shiiuen]

I place two same while-loop in the block diagram and then use highligt and single step executing function to observe their parallel running.

But I discover that this two loop run alternatively, and can not run simultaneously. 

Anyone can help me to understand this ?

My software enviorment:

OS: Windows XP SP3

Labview: 2011 Student Editions

CPU:    intel P8400

[Himanshu_Goyal]

Hi,

Can you repost your VI in some older LabVIEW versions, So everyone can have a look.

[shiiuen]

thank you for responce

[GerdW]

Hi shiiuen,

those two loops run in parallel...

But you explicitly "use highligt and single step executing function"! What do you expect with single step execution? And highlighting will always show step-by-step execution, so what do you expect here?

[shiiuen · Accepted solution]

Hi, GerdW

Thanks for reply

I post a video to illustrate my question.

While I press a highligh and run, I find that these two loops do not start at the same time.

While a loop run, the border of other one became dark.

It seems that while loop 1 run one iteration, the loop2 keep waiting. and then the loop2 run one iteration while loop1 keep waiting.

I do not know why that happens

Sincerely

[yenknip]

As GerdW said, selecting highlight and/or single step shows one step at a time. It is a debugging environment.

Turn off highlight and the loops will run in parallel during runtime.

[shiiuen]

Oh, I see, that explains the matter.

Thank you very much.