mirror/esphome
1
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2026-02-28 18:04:19 -07:00
Code Issues Packages Projects Releases Wiki Activity

[libretiny] Use system heap for BK72XX lwIP (MEM_LIBC_MALLOC=1)

Browse Source 
Replace the dedicated lwIP heap (MEM_SIZE=16/32KB) with system malloc
on BK72XX, matching what LN882H and ESP8266 already do. The BK SDK's
malloc wraps FreeRTOS pvPortMalloc which is thread-safe.

This eliminates the dedicated pool bottleneck that caused OTA slowness
when MEM_SIZE was reduced to 5KB, and frees ~5.9KB heap on BK7231N
(61,264 B → 67,144 B).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
J. Nick Koston
2026-02-21 15:37:03 -06:00
parent 6adbb34fbb
commit e463dc331e
1 changed files with 11 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
esphome/components/libretiny/__init__.py
View File

@@ -291,7 +291,7 @@ 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_SIZE 1.6KB N/A* 16/32KB 5KB N/A* 5KB BK
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
MAX_SOCKETS_UDP 4 16 22 —** —** dynamic
@@ -368,16 +368,17 @@ def _configure_lwip(config: dict) -> None:
"MEMP_NUM_TCPIP_MSG_INPKT=8", # BK: 16, RTL: 8 (opt.h), LN: 12
]
# MEM_SIZE: lwIP dedicated heap pool.
# Only BK72XX needs this — its SDK reserves a 32KB pool, way oversized.
# RTL87XX SDK default is 5KB (already reasonable).
# LN882H uses MEM_LIBC_MALLOC=1 (system heap), so MEM_SIZE is irrelevant.
# BK72XX-specific overrides:
# - 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 at MEM_SIZE=5KB.
# - 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.
# Cost: 10 × 1580 = 15.8KB static RAM (vs 3 × 1580 = 4.7KB before).
if CORE.is_bk72xx:
lwip_opts.append("MEM_SIZE=5120") # BK SDK: 16,384/32,768, RTL SDK: 5,120
# 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.
# Cost: 10 × 1580 = 15.8KB static RAM (vs 3 × 1580 = 4.7KB before).
lwip_opts.append("MEM_LIBC_MALLOC=1")
lwip_opts.append("PBUF_POOL_SIZE=10")
cg.add_platformio_option("custom_options.lwip", lwip_opts)