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tune BT stack on ESP

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liquidraver
2026-10-06 15:57:52 +02:00
parent d90ae221cf
commit c9896d93e6
2 changed files with 22 additions and 4 deletions
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zephcore/boards/common/esp32_common.conf
+4 -4
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@@ -75,10 +75,10 @@ CONFIG_BT_PRIVACY=y
# (CONFIG_ZEPHCORE_MEM_STATS, devdocs/tools/mem_load.py: fresh pairing, bonded
# reconnects, protocol golden over BLE and TCP, bulk contact dump), peak 724 B,
# so 2048 (2.8x). Was 4096.
# The controller task is not trimmable here: on S3/C3 the HAL hardcodes its
# stack to 4096 (components/bt/controller/esp32c3/bt.c) and
# ESP32_BT_CONTROLLER_STACK_SIZE is only a lower-bound check; on classic ESP32
# it is the real size but that controller (BTDM) was not measured.
# The controller task (ESP32_BT_CONTROLLER_STACK_SIZE, default 4096) is not set
# here: classic ESP32 (BTDM) and the C6 controller were not measured and keep
# the default. S3 and C3 trim it in esp32c3s3_common.conf, where the symbol
# became the real stack size with hal_espressif b16851b3c2 (2026-10-06).
CONFIG_BT_TX_PROCESSOR_STACK_SIZE=2048
CONFIG_BT_RX_STACK_SIZE=4096
zephcore/boards/common/esp32c3s3_common.conf
+18
View File
@@ -27,3 +27,21 @@
# Repeater builds do not use this value: wifi_ota.conf, appended later, sets
# the heap back to 64 KB for the WiFi driver.
CONFIG_HEAP_MEM_POOL_SIZE=45056
# ========== BLE controller task stack ==========
# Default 4096 (drivers/bluetooth/hci/Kconfig.esp32). Since hal_espressif
# b16851b3c2 (Zephyr pin 74b7173e9c9, 2026-10-06) this symbol is the real size
# of the controller task's stack on these chips; before that
# components/bt/controller/esp32c3/bt.c hardcoded 4096 and the symbol was only
# a lower-bound check. The same symbol is the size the controller is
# configured with (esp_bt.h, .controller_task_stack_size), and the HAL refuses
# to start BT if the controller asks for more than the buffer.
#
# Measured on a XIAO ESP32-S3 companion (2026-10-06, CONFIG_ZEPHCORE_MEM_STATS,
# devdocs/tools/mem_load.py: fresh pairing, bonded reconnects, protocol golden
# over BLE, 8 KB sign, 121-contact dump over BLE): peak 980 B at 4096, and
# 964 B in the same run with the stack at 2048. 2048 is 2.1x the peak and
# returns 2 KB of dram0, which the no-PSRAM Wi-Fi + BLE companions (Heltec V3,
# Wireless Tracker) need. Not measured with a Wi-Fi station link up
# (coexistence), and not measured on C3 hardware.
CONFIG_ESP32_BT_CONTROLLER_STACK_SIZE=2048