CONFIG_WQ_POWER_EFFICIENT_DEFAULT: Enable workqueue power-efficient mode by default

General informations

The Linux kernel configuration item CONFIG_WQ_POWER_EFFICIENT_DEFAULT:

• prompt: Enable workqueue power-efficient mode by default
• type: bool
• depends on: CONFIG_PM
• defined in kernel/power/Kconfig
• found in Linux kernels: 3.11–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

Per-cpu workqueues are generally preferred because they show better performance thanks to cache locality; unfortunately, per-cpu workqueues tend to be more power hungry than unbound workqueues.

Enabling workqueue.power_efficient kernel parameter makes the per-cpu workqueues which were observed to contribute significantly to power consumption unbound, leading to measurably lower power usage at the cost of small performance overhead.

This config option determines whether workqueue.power_efficient is enabled by default.

If in doubt, say N.

Hardware

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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