Hi All,
I'm having a problem with a program running on a cRIO-9074.
My controller code has 3 parallel processes (for 3 banks in my controller) that each contain 3 while loops. One reads an array of FXP values from an FPGA DMA FIFO and pushes that array into a queue. The next loop then reads the array from the queue, casts it into a string, splits that string into UDP sized chunks and places those substrings into a second queue. The final loop reads a substring from the second queue and transmits it via UDP.
Basically a producer - consumer/producer -consumer architecture.
Now this all works fine in my spaghetti-code development version with just one top-level vi. To make things more readable though I compacted things into subvis, using global variables when necessary to link them.
My code runs, but I'm getting frequent errors when transmitting the UDP strings:
"UDP Error -61: The system could not allocate the necessary memory. "
I've checked the memory usage using NI distributed systems manager and my cRIO memory has a fairly decent amount of overhead. Reducing the sampling rate - and corresponding memory usage - doesn't seem to make much difference to the time the system can go before errors. Even reducing the sampling rate right down and disabbling all but one loop (i.e. one bank) I'm still getting the errors.
How could I debug this?