UDP error 61 the cRIO - but the use of controller memory is < ~ 70%

Hi all

I'm having a problem with a program that runs on a cRIO-9074.

My controller code has 3 parallel processes (for the 3 banks in my controller) that each contain 3 while loops. Reads an array of FXP in a FPGA DMA FIFO values and pushes this table in a queue. The following loop then reads the table from the queue, it throws in a string, split that string in size of the UDP and puts these substrings in a second queue. The final loop reads a substring from the second queue and forwards via UDP.

Basically, a producer - consumer consumer/producer-architecture.

Now this works very well in my development version of spaghetti with just a first level vi code. To make things more readable even if I compacted things into subvis, using global variables when it is necessary to connect them.

My code is executed, but I get frequent errors during the broadcast channels UDP:

«UDP - 61 error: the system could not allocate required memory.»

I checked the memory usage from NOR distributed systems manager and my memory cRIO has a pretty decent amount of overhead. The sampling rate reduction - and corresponding memory use - does not make a big difference to the system time can go errors before. Even by reducing the sampling frequency straight down and disabbling that all except a loop (e.g. a Bank), I always get errors.

How I debug this?


Tags: NI Software

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