:orphan:

.. title:: CONFIG_USE_SWITCH

.. kconfig:: CONFIG_USE_SWITCH

CONFIG_USE_SWITCH
#################

*Use new-style \_arch\_switch instead of arch\_swap*

Type: ``bool``

Help
====

.. code-block:: none

    The _arch_switch() API is a lower level context switching
    primitive than the original arch_swap mechanism.  It is required
    for an SMP-aware scheduler, or if the architecture does not
    provide arch_swap.  In uniprocess situations where the
    architecture provides both, _arch_switch incurs more somewhat
    overhead and may be slower.

Direct dependencies
===================

\ :kconfig:`USE_SWITCH_SUPPORTED <CONFIG_USE_SWITCH_SUPPORTED>`

*(Includes any dependencies from ifs and menus.)*

Defaults
========

No defaults. Implicitly defaults to ``n``.

Symbols that select this symbol
===============================

- \ :kconfig:`ISA_ARCV2 <CONFIG_ISA_ARCV2>`
- \ :kconfig:`ISA_ARCV3 <CONFIG_ISA_ARCV3>`
- \ :kconfig:`X86_64 <CONFIG_X86_64>`
- \ :kconfig:`ARM64 <CONFIG_ARM64>`
- \ :kconfig:`SPARC <CONFIG_SPARC>`
- \ :kconfig:`XTENSA <CONFIG_XTENSA>`

Kconfig definition
==================



At ``<Zephyr Kernel>/Kconfig:776``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:40``

Menu path: (Top) → General Kernel Options → SMP Options

.. code-block:: kconfig

    config USE_SWITCH
    	bool "Use new-style _arch_switch instead of arch_swap"
    	depends on USE_SWITCH_SUPPORTED
    	help
    	  The _arch_switch() API is a lower level context switching
    	  primitive than the original arch_swap mechanism.  It is required
    	  for an SMP-aware scheduler, or if the architecture does not
    	  provide arch_swap.  In uniprocess situations where the
    	  architecture provides both, _arch_switch incurs more somewhat
    	  overhead and may be slower.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*