Frequent NVS Writes

RE: Frequent NVS Writes

Neil Benn — Mon, 10 Mar 2025 15:25:42 GMT

That was the exact issue- thanks.

RE: Frequent NVS Writes

Neil Benn — Mon, 10 Mar 2025 15:24:41 GMT

Hello,

Yes - it actually wasn't in that place where there was an error but another method had a memory leak. I'm about to try this wit the data coming from the BLE stack. However if that is giving me a problem its a different issue so I'll close this ticket and thanks.

Cheers,

Neil

RE: Frequent NVS Writes

Håkon Alseth — Mon, 10 Mar 2025 15:21:42 GMT

Hi,

Is the function store_slice_bw() also calling k_malloc()?

for (int i = 0; i < 10; i++){
    delete_slice(i + 1);
    store_slice_bw(cds, true);
}

if it is based on the original "store_slice" function, it seems to allocate cds.len+4 bytes within a for-loop, draining the HEAP.

Kind regards,

Håkon

RE: Frequent NVS Writes

Håkon Alseth — Mon, 10 Mar 2025 15:15:25 GMT

Hi Neil,

Were you able to get past the second iteration after free'ing the data?

Kind regards,

Håkon

RE: Frequent NVS Writes

Neil Benn — Mon, 10 Mar 2025 14:53:42 GMT

Hello,

Good point on the memory freeing thanks - though this is just a test case and I'll throw the code away once I can work out how to store larger entries; on the memory I've got:

CONFIG_HEAP_MEM_POOL_SIZE=4026

CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=9048

I increased the stack size because in the real use case I'll be taking data in from a BLE callback.

Cheers,

Neil

RE: Frequent NVS Writes

Håkon Alseth — Mon, 10 Mar 2025 14:19:38 GMT

Hi,

I see that you are allocating memory, but there's no free-call? Where do you call k_free()?

You do not check the return ptr from malloc, which I strongly recommend that you do.

What is the configured system heap size, ie. CONFIG_HEAP_MEM_POOL_SIZE?

Kind regards,

Håkon

RE: Frequent NVS Writes

Neil Benn — Fri, 07 Mar 2025 17:04:22 GMT

I put some code in to check the sector space and increased the size of each sector but that is not the cause, it still fails, interestingly all write under ~400 bytes work with everything over 550 bytes failing and intermittent failures between those two levels.