CONFIG_SCHED_SMT: SMT (Hyperthreading) scheduler support

General informations

The Linux kernel configuration item CONFIG_SCHED_SMT has multiple definitions:

SMT (Hyperthreading) scheduler support found in arch/sparc/Kconfig

The configuration item CONFIG_SCHED_SMT:

• prompt: SMT (Hyperthreading) scheduler support
• type: bool
• depends on: CONFIG_SPARC64 && CONFIG_SMP
• defined in arch/sparc/Kconfig
• found in Linux kernels: 2.6.29–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

SMT scheduler support improves the CPU scheduler's decision making when dealing with SPARC cpus at a cost of slightly increased overhead in some places. If unsure say N here.

SMT (Hyperthreading) scheduler support found in arch/powerpc/Kconfig

The configuration item CONFIG_SCHED_SMT:

• prompt: SMT (Hyperthreading) scheduler support
• type: bool
• depends on: CONFIG_PPC64 && CONFIG_SMP
• defined in arch/powerpc/Kconfig
• found in Linux kernels: 2.6.15–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

SMT scheduler support improves the CPU scheduler's decision making when dealing with POWER5 cpus at a cost of slightly increased overhead in some places. If unsure say N here.

SMT (multithreading) scheduler support found in arch/mips/Kconfig

The configuration item CONFIG_SCHED_SMT:

• prompt: SMT (multithreading) scheduler support
• type: bool
• depends on: CONFIG_SYS_SUPPORTS_SCHED_SMT
• defined in arch/mips/Kconfig
• found in Linux kernels: 2.6.25–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

SMT scheduler support improves the CPU scheduler's decision making when dealing with MIPS MT enabled cores at a cost of slightly increased overhead in some places. If unsure say N here.

SMT scheduler support found in arch/loongarch/Kconfig

The configuration item CONFIG_SCHED_SMT:

• prompt: SMT scheduler support
• type: bool
• depends on: (none)
• defined in arch/loongarch/Kconfig
• found in Linux kernels: 6.5–6.8, 6.9-rc+HEAD

Help text

Improves scheduler's performance when there are multiple threads in one physical core.

SMT scheduler support found in arch/arm64/Kconfig

The configuration item CONFIG_SCHED_SMT:

• prompt: SMT scheduler support
• type: bool
• depends on: (none)
• defined in arch/arm64/Kconfig
• found in Linux kernels: 3.15–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

Improves the CPU scheduler's decision making when dealing with MultiThreading at a cost of slightly increased overhead in some places. If unsure say N here.

SMT scheduler support found in arch/arm/Kconfig

The configuration item CONFIG_SCHED_SMT:

• prompt: SMT scheduler support
• type: bool
• depends on: CONFIG_ARM_CPU_TOPOLOGY
• defined in arch/arm/Kconfig
• found in Linux kernels: 3.2–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

Improves the CPU scheduler's decision making when dealing with MultiThreading at a cost of slightly increased overhead in some places. If unsure say N here.

found in arch/x86/Kconfig

The configuration item CONFIG_SCHED_SMT:

• prompt:
• type: bool
• depends on: CONFIG_SMP
• defined in arch/x86/Kconfig
• found in Linux kernels: 4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

(none)

found in arch/s390/Kconfig

The configuration item CONFIG_SCHED_SMT:

• prompt:
• type: bool
• depends on: (none)
• defined in arch/s390/Kconfig
• found in Linux kernels: 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

(none)

SMT scheduler support found in arch/ia64/Kconfig

The configuration item CONFIG_SCHED_SMT:

• prompt: SMT scheduler support
• type: bool
• depends on: CONFIG_SMP
• defined in arch/ia64/Kconfig
• found in Linux kernels: 2.6.12–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.6

Help text

Improves the CPU scheduler's decision making when dealing with Intel IA64 chips with MultiThreading at a cost of slightly increased overhead in some places. If unsure say N here.

SMT (Hyperthreading) scheduler support found in arch/x86/Kconfig

The configuration item CONFIG_SCHED_SMT:

• prompt: SMT (Hyperthreading) scheduler support
• type: bool
• depends on: CONFIG_SMP
• defined in arch/x86/Kconfig
• found in Linux kernels: 2.6.24–2.6.39, 3.0–3.19, 4.0–4.19

Help text

SMT scheduler support improves the CPU scheduler's decision making when dealing with Intel Pentium 4 chips with HyperThreading at a cost of slightly increased overhead in some places. If unsure say N here.

SMT (Hyperthreading) scheduler support found in arch/sparc64/Kconfig

The configuration item CONFIG_SCHED_SMT:

• prompt: SMT (Hyperthreading) scheduler support
• type: bool
• depends on: CONFIG_SMP
• defined in arch/sparc64/Kconfig
• found in Linux kernels: 2.6.17–2.6.28

Help text

SMT scheduler support improves the CPU scheduler's decision making when dealing with SPARC cpus at a cost of slightly increased overhead in some places. If unsure say N here.

SMT (Hyperthreading) scheduler support found in arch/x86_64/Kconfig

The configuration item CONFIG_SCHED_SMT:

• prompt: SMT (Hyperthreading) scheduler support
• type: bool
• depends on: CONFIG_SMP
• defined in arch/x86_64/Kconfig
• found in Linux kernels: 2.6.7–2.6.23

Help text

SMT scheduler support improves the CPU scheduler's decision making when dealing with Intel Pentium 4 chips with HyperThreading at a cost of slightly increased overhead in some places. If unsure say N here.

SMT (Hyperthreading) scheduler support found in arch/i386/Kconfig

The configuration item CONFIG_SCHED_SMT:

• prompt: SMT (Hyperthreading) scheduler support
• type: bool
• depends on: CONFIG_X86_HT
• defined in arch/i386/Kconfig
• found in Linux kernels: 2.6.7–2.6.23

Help text

SMT scheduler support improves the CPU scheduler's decision making when dealing with Intel Pentium 4 chips with HyperThreading at a cost of slightly increased overhead in some places. If unsure say N here.

SMT (Hyperthreading) scheduler support found in arch/ppc64/Kconfig

The configuration item CONFIG_SCHED_SMT:

• prompt: SMT (Hyperthreading) scheduler support
• type: bool
• depends on: CONFIG_SMP
• defined in arch/ppc64/Kconfig
• found in Linux kernels: 2.6.7–2.6.14

Help text

SMT scheduler support improves the CPU scheduler's decision making when dealing with POWER5 cpus at a cost of slightly increased overhead in some places. If unsure say N here.

Hardware

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