CONFIG_IDLE_STACK_SIZE¶

Size of stack for idle thread

Type: int

Help¶

Depending on the work that the idle task must do, most likely due to
power management but possibly to other features like system event
logging (e.g. logging when the system goes to sleep), the idle thread
may need more stack space than the default value.

Defaults¶

4096
2048
2048
2048
2048
2048
2048
2048
2048
2048
1536
1536
2048
2048
2048
2048
2048
2048
2048
2048
2048
1536
1536
1024 if 64BIT
4096
1024
4096
2048 if COVERAGE_GCOV
1024 if XTENSA
512 if RISCV
384 if DYNAMIC_OBJECTS
320 if ARC || (ARM && CPU_HAS_FPU) || (X86 && MMU)
256

Kconfig definitions¶

At <Zephyr Boards>/arm/mps2_an385/Kconfig.defconfig:52

Included via Kconfig:8 → Kconfig.zephyr:22

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 4096
    depends on COVERAGE && BOARD_MPS2_AN385

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em4:33

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:14

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM4 && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em5d:33

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:15

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM5D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em6:33

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:16

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM6 && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em7d:33

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:17

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM7D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em9d:33

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:19

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM9D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em11d:33

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:20

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM11D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsk/Kconfig.defconfig.em7d:46

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_emsk/Kconfig.defconfig:10

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on ARC_MPU_VER = 2 && SOC_EMSK_EM7D && SOC_EMSK

At <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig.em:44

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig:12

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on ARC_MPU_VER = 2 && SOC_NSIM_EM && SOC_NSIM

At <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig.em7d_v22:41

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig:13

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on ARC_MPU_VER = 2 && SOC_NSIM_EM7D_V22 && SOC_NSIM

At <Zephyr SoC>/riscv/riscv-privilege/andes_v5/Kconfig.defconfig.ae350:15

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/riscv/riscv-privilege/Kconfig.defconfig:6 → <Zephyr SoC>/riscv/riscv-privilege/andes_v5/Kconfig.defconfig.series:9

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 1536
    depends on SOC_RISCV_ANDES_AE350 && SOC_SERIES_RISCV_ANDES_V5

At <Zephyr SoC>/riscv/riscv-privilege/telink_b91/Kconfig.defconfig.series:42

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/riscv/riscv-privilege/Kconfig.defconfig:6

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 1536
    depends on SOC_SERIES_RISCV_TELINK_B91

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em4:33

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:14

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM4 && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em5d:33

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:15

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM5D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em6:33

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:16

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM6 && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em7d:33

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:17

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM7D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em9d:33

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:19

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM9D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em11d:33

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:20

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM11D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsk/Kconfig.defconfig.em7d:46

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_emsk/Kconfig.defconfig:10

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on ARC_MPU_VER = 2 && SOC_EMSK_EM7D && SOC_EMSK

At <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig.em:44

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig:12

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on ARC_MPU_VER = 2 && SOC_NSIM_EM && SOC_NSIM

At <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig.em7d_v22:41

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig:13

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 2048
    depends on ARC_MPU_VER = 2 && SOC_NSIM_EM7D_V22 && SOC_NSIM

At <Zephyr SoC>/riscv/riscv-privilege/andes_v5/Kconfig.defconfig.ae350:15

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/riscv/riscv-privilege/Kconfig.defconfig:6 → <Zephyr SoC>/riscv/riscv-privilege/andes_v5/Kconfig.defconfig.series:9

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 1536
    depends on SOC_RISCV_ANDES_AE350 && SOC_SERIES_RISCV_ANDES_V5

At <Zephyr SoC>/riscv/riscv-privilege/telink_b91/Kconfig.defconfig.series:42

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/riscv/riscv-privilege/Kconfig.defconfig:6

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 1536
    depends on SOC_SERIES_RISCV_TELINK_B91

At <Zephyr Architecture>/arc/Kconfig:373

Included via Kconfig:8 → Kconfig.zephyr:39 → <Zephyr Architecture>/Kconfig:12

Menu path: (Top)

config IDLE_STACK_SIZE
    int
    default 1024 if 64BIT

At <Zephyr Architecture>/arm64/core/Kconfig:57

Included via Kconfig:8 → Kconfig.zephyr:39 → <Zephyr Architecture>/Kconfig:12 → <Zephyr Architecture>/arm64/Kconfig:32

Menu path: (Top) → ARM64 Options

config IDLE_STACK_SIZE
    int
    default 4096
    depends on ARM64

At <Zephyr Architecture>/sparc/Kconfig:41

Included via Kconfig:8 → Kconfig.zephyr:39 → <Zephyr Architecture>/Kconfig:12

Menu path: (Top) → SPARC Options

config IDLE_STACK_SIZE
    int
    default 1024
    depends on SPARC

At <Zephyr Architecture>/x86/core/Kconfig.intel64:11

Included via Kconfig:8 → Kconfig.zephyr:39 → <Zephyr Architecture>/Kconfig:12 → <Zephyr Architecture>/x86/Kconfig:483

Menu path: (Top) → X86 Architecture Options

config IDLE_STACK_SIZE
    int
    default 4096
    depends on X86_64 && X86

At <Zephyr Kernel>/Kconfig:152

Included via Kconfig:8 → Kconfig.zephyr:40

Menu path: (Top) → General Kernel Options

config IDLE_STACK_SIZE
    int "Size of stack for idle thread"
    default 2048 if COVERAGE_GCOV
    default 1024 if XTENSA
    default 512 if RISCV
    default 384 if DYNAMIC_OBJECTS
    default 320 if ARC || (ARM && CPU_HAS_FPU) || (X86 && MMU)
    default 256
    help
      Depending on the work that the idle task must do, most likely due to
      power management but possibly to other features like system event
      logging (e.g. logging when the system goes to sleep), the idle thread
      may need more stack space than the default value.

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)