nRF5340, LittleFS writes appear to block all threads

RE: nRF5340, LittleFS writes appear to block all threads

Vidar Berg — Tue, 12 Mar 2024 14:08:05 GMT

Thanks for confirming. I'm wondering if your use of LittleFS could result in frequent page erases, which is a time consuming operation. A page erase can take up to 87.5 ms, during which the CPU will be blocked (Flash programming). Please add CONFIG_SOC_FLASH_NRF_PARTIAL_ERASE=y to your prj.conf and see if it helps mitigate the problem.

RE: nRF5340, LittleFS writes appear to block all threads

afok-esmart — Fri, 08 Mar 2024 17:37:48 GMT

Thanks for your suggestion, but I tried adding the k_msleep(5) and it did not help; still seeing the same stop in activity from my main thread. Also tried k_msleep(50) out of curiosity and the amount of time it stopped has not changed (still roughly 80ms).

RE: nRF5340, LittleFS writes appear to block all threads

Vidar Berg — Fri, 08 Mar 2024 17:00:59 GMT

Hello,

I don't immediately see any problems with the code you've posted. However, as a test, could you please try adding k_msleep(5); after LED_Yellow(LED_OFF); in your storage_thread? The filesystem API is synchronous, but I wouldn't expect it to block your other threads.

Thanks,

Vidar