QUERY · ISSUE

esp32: UDP broadcast via sendto causes memory leaks/ENOMEM error

openby dir-abletonopened 2018-08-06updated 2020-06-11

port-esp32

I described this in the uP forum:

https://forum.micropython.org/viewtopic.php?f=18&t=5063&p=28953#p28953

on further investigation, I found that commenting out

https://github.com/micropython/micropython/blob/master/ports/esp32/modsocket.c#L485

made the problem disappear - by disabling the actual functionality of course. To my uninitiated eye, this looks like a SDK issue, but at the same time there seems to be some dependency to the gc calls as documented in the forum post. Any suggestions on to get to the bottom of this?

CANDIDATE · ISSUE

RP2: Out of memory with simple "requests" script

closedby tacker66opened 2023-08-21updated 2023-08-30

bugport-rp2

The following script causes OOM within 10 minutes on a Pico W whereas it runs without leaking memory on a Nano ESP32.
Both are using the same firmware 20230816-unstable-v1.20.0-379-ga18d62e06:

import gc, time
import urequests as requests
while True:
    gc.collect()
    print(gc.mem_free(), gc.mem_alloc())
    telegram = "https://google.com"
    requests.post(telegram)
    time.sleep(60)

Assessment

Q Qwen · high

Both issues report memory leaks/OOM errors in MicroPython, but they affect different ports (ESP32 vs RP2) and involve different functionality. Issue #4029 is specifically about UDP broadcast via sendto() in the ESP32 socket implementation, while issue #12278 is about HTTP requests (urequests) causing OOM on RP2. Although both involve memory management issues in network operations, the root causes, affected code paths, and ports are different. They are related in that they both concern memory leaks in network operations, but one does not resolve the other.

Suggested action

Keep both issues open as they address different bugs on different ports. The RP2 issue may benefit from insights about memory management patterns, but the ESP32 UDP broadcast issue requires specific investigation of the ESP32 socket implementation.

esp32: UDP broadcast via sendto causes memory leaks/ENOMEM error

RP2: Out of memory with simple "requests" script

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