RTOS/TM4C1294NCPDT: TM4C1294/RTOS HTTP server loading fail

Hi Arthur,

You may find this thread explaining a bug that may be causing these to fail and how to fix it helpful: 
https://e2e.ti.com/support/embedded/tirtos/f/355/p/497052/1803424#1803424

Regards,
Gerardo

Hi Gerardo,

Thanks for your reply.

But I think my issue not same as the thread that you found.

In my case I don't need to use large receive buffer.

I use wireshark to see packets the fail loading files show "TCP out-of-order" as below.

thanks

Arthur

If I only run the HTTP server,everything works fine.
When I added 2 uart receive task and 1 system task for control GPIO ,I2C and SPI...,and the http will load failed.
The priority of these task are 2,2,1.
I don't know what cause this situation.


Arthur

Hi Arthur,

What's the priority of your Task running the HTTP server?

Thanks,
Gerardo

Hi Gerardo,

We see this simple project,one tcp handle,and one http server.

The priority of the http task is 5,I found from ROV.

When I refresh the website,I think that HTTP NDK will create task to process the requisition as below.

But website loaded the js or css files that may fail.

Arthur

Hi Arthur,

The task you highlighted on the second screenshot is overflowing its stack, do you know which task this is? This should be causing some issues so you would want to increase your Task's stack size and maybe that will fix the issue.

Let me know if that helps,
Gerardo

Hi Gerardo,

The task on the second screenshot I think that could be HTTP processing task created by HTTP NDK automatically.

The task appears only  when I do something about web page ex: change page to another.

And I found that task' stack size change with "high TaskStackSize".

I modify the high TaskStackSize to 4096 even 6000,but it is still failed.

The issue of the post is similar to mine as below.

 I changed Global.memRawPageCount to 32-50 but it not solved my problem.

https://e2e.ti.com/support/microcontrollers/tiva_arm/f/908/t/598021?tisearch=e2e-sitesearch&keymatch=TWO%20TCP

Arthur

Hi Arthur,

The Task has a priority of 5 which correspond to normTaskPriLevel, therefore you need to increase normTaskStackSize.

If that doesn't help try increasing ndkThreadStackSize as well.

Let me know if that helps,
Gerardo

Hi Gerardo,

The task with priority of 5 but I think that applied the high TaskStackSize in my test.

But I don't know why?

You can see that I set the high TaskStackSize 4096.

And the ROV showed that 0x20019450 with priority of 5 and stackSize 4096.

So I am sure that I modified normTaskStackSize not change anything.

And I increase the normTaskStackSize or highTaskStackSize it does not help.

If increasing ndkThreadStackSize the ti_ndk_config_Global_stackThread will change to my set value.

but it does not solve this problem.

Arthur 

Hi Arthur,

It looks like you're still overflowing your stack even with the size increase to 4096. You need to increase the stack size even further until your stackPeak is lower than your stackSize.

Thanks,
Gerardo

Hi Gerardo,

I think that increasing the stack size can not help this.
I also try set the stack size to 6000,the system will crash.
Now I reduce the highstacksize and ndkThreadStackSize to 1536.
It can work sometimes,sometimes it still loads failed.
I keep to modify some parameter of stack to solve this.


BR
Arthur

Hi Arthur,

So since your program seems to be always overflowing that stack even if you increase the size this leads me to believe the issue is somewhere else. I'm thinking there is probably a memory write you are performing where you are writing past that memory's allocated size and therefore writing into this Task's stack causing it to become corrupted. I would check any buffers you may have and any writes to these buffers to ensure you are not writing past their limits.

Hope that helps,
Gerardo

Arthur,

Did this get resolved?

Todd

Hi Todd,

Not yet!
I have no one direct way to fix this.
Just modify the different stacksize to test which setting is better.
In addition could you do a test in your side that opening one telnet server and one http server in the same time using RTOS.
I can only use one of them at one time (telnet or http).
The other one is always failed.

Arthur

Hi Arthur,

Did you attempt to check if something else could be corrupting that Task's stack?

I will check on the possibility of running the two server at the same time for you.

BR,
Gerardo

 Gerardo,

I think you can only try one http and one telnet server first.

And using them in the same time. 

In my side you can see the test as below .

#1.Open web page first .My server IP is 192.168.1.84.And it works well.

And then  I connect to the telnet server in the same time.

Http server was just like losing connection. Web browser sent  "getSystemSettings" to server but nothing back.

#2.If I connect to the telnet server first,it is working!

Then opening the web page I got error.

So you can do this test first to check two of them can work in the same time.

thank you.

BR

Arthur

Hi Gerardo,

Sorry it is too late to tell you the result,I have tried to enlarge heap size and it can help this issue.
thank you!

Arthur