LabVIEW
TDMS File starts recording data at 20Hz, but after a short time drops to <10Hz as VI slows, why?
@superomario wrote:What is this symbol?
That just checks if the array is empty. It prevents you from logging data to disk if you have none generated from the earlier for loop.
Unrelated rant (because it is a pet peeve of mine) that crossrulz commented on earlier when he said ... "The queue can then be safely destroyed and we can guarantee that all of the data has been logged."
Yes, I know that if you go "New -> Vi from Template -> Producer/Consumer Design Pattern (Data), it basically suggests stopping your consumer loop from an error - exactly like you did. It was (in my opinion) a very stupid choice of NI to include this as the default design pattern for Producer/Consumer. If you still have items in your queue at the time you hit the stop button, it instantly releases that queue and you never give your consumer loop a chance to dequeue / respond to the remaining elements in the queue. The pattern crossrulz suggests will ensure that all of your data is out of the queue and logged before releasing it.
