Simulated ESP device does not return from light sleep on idle

[lptr]

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Describe the bug

I'm using power management on my esp32s3 firmware to put the device to sleep when idle. This works fine on the physical device, as it sleeps a few milliseconds between tasks. However, when this happens during simulation (=FreeRTOS's idle task puts the device to light sleep), the simulation never returns to a running state.

To Reproduce

https://github.com/lptr/light-sleep-on-idle

There are the following requirements to reproduce the problem (all set up in the repo above):

• in sdkconfig the CONFIG_FREERTOS_USE_TICKLESS_IDLE option needs to be enabled,
• in main.c we need to call esp_pm_configure() to enable light sleep on idle,
• the device needs to be idle, e.g. by running vTaskDelay().

Once the device enters the delay it never comes back to running in the simulator.

Full console output:

ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x1 (POWERON),boot:0x8 (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fce2810,len:0x178c
load:0x403c8700,len:0x4
load:0x403c8704,len:0xcb8
load:0x403cb700,len:0x2db0
entry 0x403c8914
I (23) boot: ESP-IDF v5.3.1-dirty 2nd stage bootloader
I (24) boot: compile time Nov 28 2024 22:22:31
I (25) boot: Multicore bootloader
I (28) boot: chip revision: v0.0
I (31) boot.esp32s3: Boot SPI Speed : 80MHz
I (36) boot.esp32s3: SPI Mode       : DIO
I (40) boot.esp32s3: SPI Flash Size : 4MB
I (45) boot: Enabling RNG early entropy source...
I (51) boot: Partition Table:
I (54) boot: ## Label            Usage          Type ST Offset   Length
I (62) boot:  0 nvs              WiFi data        01 02 00009000 00006000
I (69) boot:  1 phy_init         RF data          01 01 0000f000 00001000
I (76) boot:  2 factory          factory app      00 00 00010000 00100000
I (84) boot: End of partition table
I (88) esp_image: segment 0: paddr=00010020 vaddr=3c020020 size=0ae38h ( 44600) map
I (128) esp_image: segment 1: paddr=0001ae60 vaddr=3fc94000 size=02b14h ( 11028) load
I (140) esp_image: segment 2: paddr=0001d97c vaddr=40374000 size=0269ch (  9884) load
I (151) esp_image: segment 3: paddr=00020020 vaddr=42000020 size=192c8h (103112) map
I (225) esp_image: segment 4: paddr=000392f0 vaddr=4037669c size=0d8c8h ( 55496) load
I (277) esp_image: segment 5: paddr=00046bc0 vaddr=600fe000 size=00100h (   256) load
I (280) esp_image: segment 6: paddr=00046cc8 vaddr=600fe100 size=00008h (     8) load
I (309) boot: Loaded app from partition at offset 0x10000
I (310) boot: Disabling RNG early entropy source...
I (321) cpu_start: Multicore app
I (331) cpu_start: Pro cpu start user code
I (332) cpu_start: cpu freq: 160000000 Hz
I (333) app_init: Application information:
I (334) app_init: Project name:     light-sleep-on-idle
I (340) app_init: App version:      1
I (345) app_init: Compile time:     Nov 28 2024 22:22:19
I (351) app_init: ELF file SHA256:  7853b124d...
I (356) app_init: ESP-IDF:          v5.3.1-dirty
I (361) efuse_init: Min chip rev:     v0.0
I (366) efuse_init: Max chip rev:     v0.99 
I (371) efuse_init: Chip rev:         v0.0
I (376) heap_init: Initializing. RAM available for dynamic allocation:
I (383) heap_init: At 3FC974A0 len 00052270 (328 KiB): RAM
I (389) heap_init: At 3FCE9710 len 00005724 (21 KiB): RAM
I (395) heap_init: At 3FCF0000 len 00008000 (32 KiB): DRAM
I (401) heap_init: At 600FE108 len 00001EE0 (7 KiB): RTCRAM
I (410) spi_flash: detected chip: gd
I (412) spi_flash: flash io: dio
I (417) sleep: Configure to isolate all GPIO pins in sleep state
I (424) sleep: Enable automatic switching of GPIO sleep configuration
I (442) main_task: Started on CPU0
I (452) main_task: Calling app_main()
I (452) pm: Frequency switching config: CPU_MAX: 160, APB_MAX: 80, APB_MIN: 40, Light sleep: ENABLED
I (452) sleep: Code start at 0x42000020, total 103110, data start at 0x3c020020, total 44600 Bytes
I aitn't dead!

Expected behavior

I aitn't dead! should be printed once every second, instead of just once.

The simulated device should return to running after a very short period of time, as FreeRTOS only puts the device to light sleep until the end of the requested vTaskDelay().

Environment (please complete the following information):

Version: 1.95.3 (system setup) Commit: f1a4fb101478ce6ec82fe9627c43efbf9e98c813 Date: 2024-11-13T14:50:04.152Z Electron: 32.2.1 ElectronBuildId: 10427718 Chromium: 128.0.6613.186 Node.js: 20.18.0 V8: 12.8.374.38-electron.0 OS: Windows_NT x64 10.0.22631