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v4: reserve the net worker's stack in begin() + boot memory probes

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The worker's 8 KB internal stack was only ever claimed lazily, the first
time the map or store asked for it — by which point the Wi-Fi driver has
taken the internal heap. Its own comment always said 'allocated at
UITask::begin() time' and explained why (grab it before Wi-Fi associates,
then it stays ours); that call site never existed. Measured on the V4:
68 KB free / 59 KB largest block at end of boot, versus 664 bytes free and
a 4-byte largest block once Wi-Fi was up — so tiles, the update check and
the app catalog were all dead there, not just the store.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Kaj SchittecatandClaude Opus 4.8 committed 2026-08-04 19:17:43 +02:00
1 parent edb5b1dbb5
commit fbcd524a65
2 files changed
+96 -12
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src/main.cpp
+21
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@@ -275,6 +275,16 @@ void meshcomodClearSdMigLatch() {
}
#endif
// Boot memory trace: 175 KB of internal RAM is gone before the UI starts, and
// nothing said where. Print free/largest at each init step so the consumer
// names itself instead of being guessed at.
#define BOOTMEM(tag) do { \
multi_heap_info_t _h{}; heap_caps_get_info(&_h, MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT); \
Serial.printf("[BOOTMEM] %-12s free=%6u largest=%6u psram=%7u\n", tag, \
(unsigned)_h.total_free_bytes, (unsigned)_h.largest_free_block, \
(unsigned)ESP.getFreePsram()); Serial.flush(); } while (0)
void setup() {
Serial.begin(115200);
#if defined(HAS_RAK_TAP_V2)
@@ -283,6 +293,7 @@ void setup() {
delay(200);
#endif
Serial.println("[BOOT] setup start");
BOOTMEM("setup-start");
// Widen the task-watchdog grace period. The ~5 s default trips during a legitimate-but-slow flash
// burst — a SPIFFS garbage-collect, or a bulk save (DataStore issues ~12 flash ops per contact,
@@ -325,6 +336,7 @@ void setup() {
board.begin();
Serial.println("[BOOT] board ok");
BOOTMEM("post-board");
#if defined(HAS_RAK_TAP_V2)
// Quick PSRAM sanity check — silent crash before SPIFFS could be bad PSRAM config
@@ -372,7 +384,9 @@ void setup() {
}
#endif
BOOTMEM("pre-radio");
if (!radio_init()) { halt(); }
BOOTMEM("post-radio");
Serial.println("[BOOT] radio ok");
fast_rng.begin(radio_driver.getRngSeed());
@@ -405,6 +419,7 @@ void setup() {
#endif
#if defined(NRF52_PLATFORM) || defined(STM32_PLATFORM)
BOOTMEM("pre-fs");
InternalFS.begin();
#if defined(QSPIFLASH)
if (!QSPIFlash.begin()) {
@@ -418,7 +433,9 @@ void setup() {
ExtraFS.begin();
#endif
#endif
BOOTMEM("pre-store");
store.begin();
BOOTMEM("pre-mesh");
the_mesh.begin(
#ifdef DISPLAY_CLASS
disp != NULL
@@ -432,9 +449,13 @@ void setup() {
#else
serial_interface.begin(Serial);
#endif
BOOTMEM("pre-iface");
the_mesh.startInterface(serial_interface);
BOOTMEM("post-iface");
#elif defined(RP2040_PLATFORM)
BOOTMEM("pre-littlefs");
LittleFS.begin();
BOOTMEM("post-littlefs");
store.begin();
the_mesh.begin(
#ifdef DISPLAY_CLASS