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Fix ADR-081 Timer Svc stack overflow on ESP32-S3

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emit_feature_state() runs inside the FreeRTOS Timer Svc task via the
fast loop callback; it memsets an rv_feature_state_t, queries vitals/
radio, and sends via stream_sender (lwIP sendto). Default Timer Svc
stack is 2 KiB, which overflows and panics ~1 s after boot:

  ***ERROR*** A stack overflow in task Tmr Svc has been detected.

Bump CONFIG_FREERTOS_TIMER_TASK_STACK_DEPTH to 8 KiB across the three
sdkconfig defaults files (default, template, 4mb). Matches the main
task stack size already in use.

Found during on-device validation on ESP32-S3 (MAC 3c:0f:02:e9:b5:f8)
after flashing the post-merge v0.6.1 build — firmware boots, connects
WiFi, emits one medium tick, then crashes on the fast tick that calls
emit_feature_state().

Follow-up: consider moving emit_feature_state + network I/O out of the
timer daemon into a dedicated worker task (open issue).

Co-Authored-By: claude-flow <ruv@ruv.net>
This commit is contained in:
ruv 2026-04-20 10:48:21 -04:00
parent 5a7f431b0e
commit a426ae386d
3 changed files with 12 additions and 0 deletions
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4
firmware/esp32-csi-node/sdkconfig.defaults
View file

@ -31,3 +31,7 @@ CONFIG_LWIP_SO_RCVBUF=y
# FreeRTOS: increase task stack for CSI processing
CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
# ADR-081: adaptive_controller runs emit_feature_state + stream_sender
# network I/O inside Timer Svc callbacks, exceeding the 2 KiB default.
CONFIG_FREERTOS_TIMER_TASK_STACK_DEPTH=8192

4
firmware/esp32-csi-node/sdkconfig.defaults.4mb
View file

@ -27,3 +27,7 @@ CONFIG_LOG_DEFAULT_LEVEL_INFO=y
CONFIG_LWIP_SO_RCVBUF=y
CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
# ADR-081: adaptive_controller runs emit_feature_state + stream_sender
# network I/O inside Timer Svc callbacks, exceeding the 2 KiB default.
CONFIG_FREERTOS_TIMER_TASK_STACK_DEPTH=8192

4
firmware/esp32-csi-node/sdkconfig.defaults.template
View file

@ -31,3 +31,7 @@ CONFIG_LWIP_SO_RCVBUF=y
# FreeRTOS: increase task stack for CSI processing
CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
# ADR-081: adaptive_controller runs emit_feature_state + stream_sender
# network I/O inside Timer Svc callbacks, exceeding the 2 KiB default.
CONFIG_FREERTOS_TIMER_TASK_STACK_DEPTH=8192