AM437x NDK fails to send large packets

Jacek Jaworski

Hi,

I use idkam437x with ccs 6.1.2, sysbios 6.45.1.29, sdk 2.1.1.2 and ndk 2.24.3.35.

I have written the Ethernet-based application which is intended to send the big amount of calculated data (32kB) through the ethernet socket. I know that the default tx buffer size is 8192 bytes so I decided to divide my data into packets of that size. Every time I call the send() function and gives it the data size =8192 it returns the status 8192 which makes me think that my data was sent correctly. However, I cannot see that via Wireshark. Nevertheless, the small packets (up to 10 bytes) are sent without any problems in Ethernet frames of total size 64bytes. Could you please advice me from where the problem might come from?

Thank you very much in advance!

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

The RTOS team have been notified. They will respond here.

0 David Zaucha over 9 years ago in reply to Biser Gatchev-XID

TI__Expert 7570 points

Hi JJ

As a first step please try the following

From the NDK User Guide 2.24.03.35

Pings to NDK target Fails Beyond 3012 Size

The NDK's default configuration allows reassembly of packets up to "3012" bytes. To be able to ping

bigger sizes, the stack needs to be reconfigured as follows:

Change the "MMALLOC_MAXSIZE" definition in "pbm.c" file. (i.e. #define MMALLOC_MAXSIZE 65500) and rebuild the library.
Increase the Memory Manager Buffer Page Size in the Buffers tab of the Global configuration.
Increase the Maximum IP Reassembly Size property of the IP module configuration.

In C:\ti\ndk_2_24_03_35\packages\ti\ndk\stack\pbm\pbm.c

Set #define MMALLOC_MAXSIZE 65500

Then rebuild the NDK

In the application .cfg file Add the following lines:

Global.memRawPageSize = 12288;

Ip.maxReassemblySize = 12288;

David

0 Jacek Jaworski over 9 years ago in reply to David Zaucha

Expert 1325 points

Hi David,

Thanks for the answer.

The above steps did not result in any changes - still the boundary of tx data is close to 10.

Thanks,

0 Jacek Jaworski over 8 years ago in reply to David Zaucha

Expert 1325 points

Hi,
Is there any new suggestion to the issue ?
I have tried all the steps you suggested and the problem still exists. Unfortunately, many other steps mentioned in the manuals gave me the same result...
Thanks in advance!
JJ

0 David Zaucha over 8 years ago in reply to Jacek Jaworski

TI__Expert 7570 points

Hi JJ,

I apologize for the delay.
What did you use as a reference in developing your application?
Could you upload your CCS project so we can try to reproduce the issue .

David

0 Jacek Jaworski over 8 years ago in reply to David Zaucha

Expert 1325 points

Hi David,

I apologize for the huge delay - I was not informed by my E2E Community system that you responded to my question.

We still have the problem in our project - it is bypassed somehow but it still exists.

I will need one or two days for project preparation to being send - I need to remove some crucial things not related to the ethernet itself.

Do I need to try something else with configuration before sending it (just in case)?

Thanks!

0 David Zaucha over 8 years ago in reply to Jacek Jaworski

TI__Expert 7570 points

Hi JJ

We will just need your build configuration.

David

0 Jacek Jaworski over 8 years ago in reply to David Zaucha

Expert 1325 points

Hi David,

Here is our build configuration (both .bin and TI's .bin files):

ST.zip

The code inside awaits the ethernet connection on port 7 IP: 192.168.1.3 - when connected, it should send approx 200 bytes - when I set the amount up to 10 it goes correctly, when more it does not send it at all....

Thanks,

0 David Zaucha over 8 years ago in reply to Jacek Jaworski

TI__Expert 7570 points

Hi Jacek

I apologize for the delay in responding.

It is difficult for us to get much insight into the problem that you are encountering

Could you provide a cut down version of the CCS project that includes the source code which we could review ?

David

0 Jacek Jaworski over 8 years ago in reply to David Zaucha

Expert 1325 points

Hi David,

thanks for the answer.

Sure I can prepare a cut down version - I need a few days to cut off some (IP) code parts.

Thanks,

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AM437x NDK fails to send large packets