Nordic - nRF9160 (nRF Zephyr SDK) - Is __heapstats() Supported? When will it be supported if not?

[johnwest]

Hello,

Are there plans to support the ARM function __heapstats() for the nRF9160 (under Zephyr)?

I see since 1.9.x sys_heap_runtime_stats_get() is supported - but when I try to compile under 1.9.1 it says I'm trying to redefine the function and/or 

struct sys_heap_runtime_stats stat; -> sizeof stat Is undefined or unknown.

Are there working examples of either of these two functions someplace for the nRF9160 under Zephyr?

I have the following in my source:

#include <sys/sys_heap.h>

#define CONFIG_SYS_HEAP_RUNTIME_STATS

I see also from the pull request logs for Zephyr on github this was done (adding the sys_heap stats) in the Fall of 2021.

Thanks,
John W.

[Amanda Hsieh]

Hi, 

#include <sys/sys_heap.h>

Can you try #include <zephyr/sys/sys_heap.h>?

Regards,
Amanda

[johnwest]

Amanda,

When I do that - it says sys_heap.h isn't found.

With #include <sys/sys_heap.h> - sys_heap.h is found.

Regards,
John W.

[Amanda Hsieh]

Hi John,

#define CONFIG_SYS_HEAP_RUNTIME_STATS

CONFIG_SYS_HEAP_RUNTIME_STATS should go in the prj.conf, not a source file. 

Try to add it into the prj.conf and let me know it can work or not. Thanks. 

Regards,
Amanda

[johnwest]

Amanda,

That fixed the structure issue for struct sys_heap_runtime_stats stat;  -

but when I run the code it jumps to an exception.

I want to see if I can determine the real-time heap while running under Zephyr.

Thanks,
John W.

[Amanda Hsieh]

Hi, 

Not sure what is your code, but you can take a look how it is used at https://github.com/nrfconnect/sdk-nrf/blob/e54437a9feffa55f871e60559d7e495befeeb90a/lib/nrf_modem_lib/diag.c#L28

Regards,
Amanda

[johnwest]

Amanda,

At least that's a real example that you've found - 

sys_heap_runtime_stats_get(&nrf_modem_lib_shmem_heap.heap, &stats->shmem.heap);

And that's great if it's the nrf_model_lib_shmem_heap I'm wanting to monitor - but to be useful in this app I need a way to get a handle to the remaining available memory that's in the 1/2 of the 9160's M33 memory space - what's left of the 0x40000 / 2 -> 0x20000 -> 128KB - what's the handle to that?  

Once I know that - then sys_heap_runtime_stats_get() will be useful.

Maybe there's an additional config option for this - I've searched 'heap' in the available options - it doesn't jump out at me if it's there.

If I'm understanding this correctly - there's modem heap, Zephyr heap, and application heap - and I don't know the handle to the application heap.

Thanks,
John