mirror/esphome
1
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2026-03-01 02:14:19 -07:00
Code Issues Packages Projects Releases Wiki Activity

[libretiny] Enable MEM_LIBC_MALLOC + MEMP_MEM_MALLOC on all platforms

Browse Source 
Move MEM_LIBC_MALLOC=1 and MEMP_MEM_MALLOC=1 from BK72XX-only to all
LibreTiny platforms. All three SDKs (BK/RTL/LN) wire malloc to
FreeRTOS pvPortMalloc (thread-safe), and WiFi receive paths run in
task context.

Tested on RTL87xx (BW15): 84,184 B → 103,744 B free heap (~19.6KB
freed). OTA and web server confirmed working.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
J. Nick Koston
2026-02-21 16:37:56 -06:00
parent 30d694e62e
commit 5b5bc28ba3
1 changed files with 16 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
esphome/components/libretiny/__init__.py
View File

@@ -291,8 +291,8 @@ def _configure_lwip(config: dict) -> None:
────────────────────────────────────────────────────────────────────────────
TCP_SND_BUF 2×MSS 4×MSS 10×MSS 5×MSS 7×MSS 4×MSS
TCP_WND 4×MSS 4×MSS 10×MSS 2×MSS 3×MSS 4×MSS
MEM_LIBC_MALLOC 1 1 0 0 1 1 BK
MEMP_MEM_MALLOC 1 1 0 0 0 1 BK
MEM_LIBC_MALLOC 1 1 0 0 1 1
MEMP_MEM_MALLOC 1 1 0 0 0 1
MEM_SIZE N/A* N/A* 16/32KB 5KB N/A* N/A* BK
PBUF_POOL_SIZE 10 16 3/10 20 20 10 BK
MAX_SOCKETS_TCP 5 16 12 —** —** dynamic
@@ -371,25 +371,24 @@ def _configure_lwip(config: dict) -> None:
"MEMP_NUM_TCPIP_MSG_INPKT=8", # BK: 16, RTL: 8 (opt.h), LN: 12
]
# BK72XX-specific overrides:
# Use system heap for all lwIP allocations on all LibreTiny platforms.
# - MEM_LIBC_MALLOC=1: Use system heap instead of dedicated lwIP heap.
# BK SDK defaults to a 16/32KB dedicated pool (MEM_LIBC_MALLOC=0).
# LN882H already uses MEM_LIBC_MALLOC=1. This eliminates the dedicated
# pool bottleneck that caused OTA slowness due to heap fragmentation.
# Safe because BK SDK wires mem_clib_malloc → os_malloc → pvPortMalloc
# (FreeRTOS thread-safe heap).
# LN882H already ships with this. BK SDK defaults to a 16/32KB dedicated
# pool that fragments during OTA. RTL SDK defaults to a 5KB pool.
# All three SDKs wire malloc → pvPortMalloc (FreeRTOS thread-safe heap).
# - MEMP_MEM_MALLOC=1: Allocate MEMP pools from heap on demand instead
# of static arrays. Saves ~20KB RAM for unused pool entries. Safe because
# the BK WiFi driver's receive path runs in task context (core_thread),
# not ISR context — the ISR only posts to a queue. ESP32 and ESP8266
# of static arrays. Saves ~20KB RAM on BK72XX. Safe because WiFi
# receive paths run in task context, not ISR context. ESP32 and ESP8266
# both ship with MEMP_MEM_MALLOC=1.
# - PBUF_POOL_SIZE: BK SDK "reduced plan" sets this to only 3 — too few
# for multiple concurrent connections (API + web_server + OTA).
# BK default plan uses 10; match that. RTL(20) and LN(20) need no override.
# With MEMP_MEM_MALLOC=1, this is a max count (allocated on demand).
lwip_opts.append("MEM_LIBC_MALLOC=1")
lwip_opts.append("MEMP_MEM_MALLOC=1")
# BK72XX-specific: PBUF_POOL_SIZE override
# BK SDK "reduced plan" sets this to only 3 — too few for multiple
# concurrent connections (API + web_server + OTA). BK default plan
# uses 10; match that. RTL(20) and LN(20) need no override.
# With MEMP_MEM_MALLOC=1, this is a max count (allocated on demand).
if CORE.is_bk72xx:
lwip_opts.append("MEM_LIBC_MALLOC=1")
lwip_opts.append("MEMP_MEM_MALLOC=1")
lwip_opts.append("PBUF_POOL_SIZE=10")
cg.add_platformio_option("custom_options.lwip", lwip_opts)