Having an issue with a cRIO-9047 momentarily hanging, it just stops for up to 4 seconds, sometimes shorter.
Details:
Using the 19.5 drivers
I've done much work on code to narrow down the problem - basic code with a Que'd loop with nothing going on, 5 msec timeout on the que, calls the default case which does nothing.
Network streams established to local PC, using NI streaming VI example code.
Monitoring Loop time on the cRIO.
In this case it may go an hour before the loop time suddenly jumps to 3 or 4 seconds, and it will repeat all night long with increased max loop times. In between will return to 5 msec and run as normal.
Increasing the system back to it's normal config;
Default case reads DAQmx data at 2kHz and streams to PC via network stream.
In this case it will be less than an hour and loop times will exceed 4 seconds briefly.
Adding on 3 cDAQ-9189 chassis's using 802 TSN, DAQmx channels being read across all chassis
In this case within 20 minutes, loop times exceed 4 seconds briefly.
- Of course this causes sync loss on the TSN and all data is now jeopardized.
It does return to normal for a period of time and then again gets a spike in loop time.
With the basic "do nothing" code, I've monitored CPU%, and ISR%, along with loop time.
Each time the loop time spike occurs, either a CPU% went large (>85%), or an ISR went large.
Further info:
We have 2 identical panels setup this way. One seems to run fine - even with the DAQ running, it ran for days with no sync loss, no large loop times.
Software check between the 2 panels - same exact software - line per line.
I have swapped out the cRIO-9047 in the troublesome panel thinking it was an easy answer - it still is doing the same thing - large loop times with nothing running.
Power is good, grounding is good. No error logs on the cRIO.
Has anyone experienced anything like this?
