:orphan:

.. title:: USE_SWITCH

.. option:: CONFIG_USE_SWITCH

*Use new-style _arch_switch instead of arch_swap*

Type: ``bool``

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.

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

\ :option:`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
===============================

- \ :option:`CPU_ARCV2 <CONFIG_CPU_ARCV2>`
- \ :option:`CPU_CORTEX_A <CONFIG_CPU_CORTEX_A>`
- \ :option:`X86_64 <CONFIG_X86_64>`
- \ :option:`SPARC <CONFIG_SPARC>`
- \ :option:`XTENSA <CONFIG_XTENSA>`

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

.. highlight:: kconfig

At ``kernel/Kconfig:762``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:30``

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

.. parsed-literal::

    config USE_SWITCH
    	bool "Use new-style _arch_switch instead of arch_swap"
    	depends on \ :option:`USE_SWITCH_SUPPORTED <CONFIG_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.)*