Using ndk example with slave cores

The last function that was executing would appear to have overwritten B3 (used as a return pointer) it could be a stack corruption if B3 was needed and pushed to the stack and popped off later, especially if the stack overflowed into data space that then got overwritten.

Anyway the 0x4000 in the NRP says it tried to execute code at 0x4000, which isn't a valid memory space.  And B3 being 0x4000 would imply it try to return from a function to that location which isn't valid, something corrupted it.

Look at the SP, where it's allocated and how much is allocated - is this still in the valid (or close to the edge) of the valid stack?

Best Regards,

Chad

Chad,

I did some modifications to my project and the console output has changed.

I was getting  Invalid CIO command  message a few times:

[C66xx_6] t.i.ssysioo..hehaass.HeHaepaMemm:  lliinnee  ti.sysbios.heaps.HeapMem: line 329: assertion failure: A_invalidFree: Invalid free
xdc.runtime.Error.raise: terminating execution
[C66xx_3] Invalid CIO command (47) in the CIO buffer at address (0x890abd00) was not recognized. Please check the device and program memory maps.
[C66xx_4] Invalid CIO command (47) in the CIO buffer at address (0x890abd00) was not recognized. Please check the device and program memory maps.
xdc.runtime.Error.raise: terminating execution
[C66xx_3] ti.sysbios.heaps.HeapMem: line 329: assertion failure: A_invalidFree: Invalid free
xdc.runtime.Error.raise: terminating execution
[C66xx_7] Invalid CIO command (47) in the CIO buffer at address (0x890abd00) was not recognized. Please check the device and program memory maps.
xdc.runtime.Error.raise: terminating execution

But know I am getting nothing in my console.

I was reading in other post that it is possible that  exist a problem of

 cache coherence but I dont understand why if I only have added two functions

to the ndk helloworld example for c6678 and the only thing those functions do is

print in console a simple string.

I attach a minimal project that can be used to  replicate the problem., 7652.helloWorld_case2_7slaves.zip

Regards.

I'm going to ask a colleague who's more familiar with the NDK code base to comment on this.  Looks like the heap may be being corrupted based on this.

Best Regards,
Chad 

I looked at you code, in your stackTest(), do you really use anything for the code starting from: rc = NC_SystemOpen( NC_PRIORITY_LOW, NC_OPMODE_INTERRUPT );

Is that correct understanding you just want to use the NDK hello world as an skeleton to write a simple multi-core application (system_printf) with IPC? And the code has nothing with NDK stack?

Regards, Eric

Eric,

I want to use  the ndk hello world for receive data and then process it using the 8 cores.

That project I posted is for see what is the problem I have just added messageq implementation to ndk helloworld.,

My idea is get this information using ndk example in core 0 and being the master core distribute

the information to cores 1 to 7 in order to process that data.

I was working  with nkd hello world example for my application and it works well using one core.

I have used messsageq for another part of the application and it works fine.

Now I need to use ndk with messageq. 

Regards.

You run the NDK helloworld on one core (core 0) or you want to run NDK on all 8 cores simulatously? From the http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/p/167588/834417.aspx. You can't do 8 cores NDK.

Regards, Eric

I just need to run it in one core, other cores just are going to process arriving  information.

Regards

Hi,

I was running some tests and I realize the program works well if I load the image  in all cores and run core by core. Core 0 runs ndk well.

The problem is when I tried to group the cores, no message appears in console window.

I checked image processing demo and it seems to use a similar  implementation to what I need. The only difference I have found until now is that  demo use one image for core 0, as master, and  one image for the others cores, as slaves.

So the question is:

Is it possible to get ndk helloworld example works with messageq capabilities using one image, if yes what I need to modified in my code, or I need to generate other image for slave cores?

Regards

I have  tried adding a  udp connection to  image_processing_evmc6678 demo and it works If I define a task for the DaemonNew function it receives the data well and the demo with the image filter still work with the 8 cores.

So I want to understand what is the extra code that let that demo work with ndk and messageq.

So if someone could have some idea what is needed to do a ndk helloworld to work with messageq that would help me a lot.

Any comments and suggestions are welcome.

Regards.

Hi JGarcia!

        I am working on 6678 now and I want to add messageq module to the helloworld example  ?have u solved this problem ?could u give me some information or helps ? thanks a lot!