NDK crash during high network traffic on C6655

Steve Ziuchkovski

Other Parts Discussed in Thread: TMDSEVM6657

Our board has a C6655 DSP. When we flood it with data, the network stack appears to stop working. I've captured the packets on the line, and the DSP stops sending ACKs for the connection, and the DSP needs to be rebooted to recover.

We found this article on TI's website about and NDK crash for the DM648. I used the procedure from that article to cause the HUA demo running on a TMDSEVM6657 eval board to lock up its network stack (i.e., none of our code or hardware). I believe the same problem with the DM648 is happening with the C6655 DSP.

Is there a solution for this?

over 9 years ago

0 Steve Ziuchkovski over 9 years ago

Expert 1255 points

While running our application, I've monitored some of the network stack statistics. I'm having trouble getting some of the lower-level stats, see this question on the TI-RTOS forum about that if you're curious.

I noticed something interesting in the IP statistics (which are in ndk/inc/stack/ipf.h). ips.Total and ips.Delivered, when everything is working, track each other pretty well. However, in the error condition, ips.Delivered continues to increase at the same rate, while ips.Total slows significantly.

I guess I don't completely understand those stats, because I would have expected the total number of packets to be continuing to increase, but the number of packets delivered to drop, since it seems like packets aren't being delivered to the application any more.

Anyway, maybe this information might be useful.

0 Raja over 9 years ago in reply to Steve Ziuchkovski

TI__Guru* 81335 points

Response may be delayed due to holidays in India. Thank you for your patience

0 Steve Ziuchkovski over 9 years ago in reply to Raja

Expert 1255 points

Hello. So, it's been about 6 months. Is that holiday over yet? :)

0 Titusrathinaraj Stalin over 9 years ago

TI__Guru** 116100 points

Dear Steve,
You are able to reproduce the issue on C6657 EVM board with helloworld or client NDK example ?

0 Steve Ziuchkovski over 9 years ago in reply to Titusrathinaraj Stalin

Expert 1255 points

Titusrathinaraj Stalin said:

You are able to reproduce the issue on C6657 EVM board with helloworld or client NDK example ?

If you're asking if I tried another demo, I did not. Primary reason: The HUA demo was used as the starting point for our application.

As I mentioned in my original post, I was able to reproduce the issue with an TMDSEVM6657 running the HUA demo, using the procedure from the DM648 issue by flooding it with pings.

0 Titusrathinaraj Stalin over 9 years ago in reply to Steve Ziuchkovski

TI__Guru** 116100 points

Thanks Steve, let me try it on my side and check with internal team.

0 Titusrathinaraj Stalin over 9 years ago in reply to Steve Ziuchkovski

TI__Guru** 116100 points

Yes, I'm also able to reproduce the problem using HUA demo and NDK examples of C6657 in MCSDK2.01.02.06 package.

0 Titusrathinaraj Stalin over 9 years ago in reply to Titusrathinaraj Stalin

TI__Guru** 116100 points

Also now I have tried to run the latest EMAC (helloworld NDK) example and did not get this issue on C6657 EVM board.
So your issue would resolve if you update to latest processor SDK package.

software-dl.ti.com/.../index_FDS.html

Processors

Processors forum

NDK crash during high network traffic on C6655