Loss of data for the network flow

I have an application where I need a chassis CRIO 9068 stream to a PC, and I'm running into some problems with data loss.

The CRIO is sampling data, put in a picture 2D tanks (the size depends on the number of channels and the sampling frequency) and it streaming on the PC.  Data loss is not consistent, sometimes no data will be lost. Also the size of the array be listened to believe makes no difference, sometimes I won't lose data 24 channels 25 kech. / s, and sometimes I'll lose data 1-channel 10KS/s.

The VI (host PC) runs in a non-timed while loop, it runs generally to about 50 Hz, sometimes hiccups system will make it slower for a loop or both.  Wirte CRIO loop runs at 20 Hz.  I think that the loss of data occurs when the PC has an if its hiccups, I know well that the size of the buffer to the stream network could absorb these hiccups.  If I make the size of the buffer is bigger, I seem to have a memory leak and the CRIO crashes after a few minutes.  I have also the CRIO record data directly without streaming, and no data is lost here, so I know its disappear somewhere in the stream.

I also have a separate Standard TCP connection between for command and control, do not know if this could cause an interfereing with the network flow problem.

I have attached photos of the screws where the endpoints are creadted and where data is written and read.

I'm using Labview/RT 2013

Thank you

Suggestion of the AGJ is a good thing.  I had trouble keeping your code - there were so many things with wires everywhere...

I have an application that runs on a PXI-8106 controller streaming 24 channels of data collected at 1 KHz (or 24K s/s).  He gets streaming via network to the host computer and from there flows streaming to disk.  At the same time, I'm streaming "Events" (transitions State, DIO line changes, etc.) to another stream from network to another data file.  A key step is that the data is off the network stream, they are put in a queue for sending the disk.  There are several parallel running loops, and I never lose a sample (I can tell because one of my channels is a "clock", the index of the loop timed running on the PXI system that produces the data that is sent to the host through the network stream - I can inspect this channel and see that each point is different from the previous one by 1).

Do you use queues to stamp your data in and out of the network stream?

BS

Tags: NI Software

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