:orphan:

.. title:: CONFIG_NUM_PREEMPT_PRIORITIES

.. kconfig:: CONFIG_NUM_PREEMPT_PRIORITIES

CONFIG_NUM_PREEMPT_PRIORITIES
#############################

*Number of preemptible priorities*

Type: ``int``

Help
====

.. code-block:: none

    Number of preemptible priorities available in the system. Gives access
    to priorities 0 to CONFIG_NUM_PREEMPT_PRIORITIES - 1.

    This can be set to 0 to disable preemptible scheduling.

    The total number of priorities is

     NUM_COOP_PRIORITIES + NUM_PREEMPT_PRIORITIES + 1

    The extra one is for the idle thread, which must run at the lowest
    priority, and be the only thread at that priority.

Defaults
========

- 0 if !\ :kconfig:`MULTITHREADING <CONFIG_MULTITHREADING>`
- 15

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



At ``<Zephyr Kernel>/Kconfig:51``

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

Menu path: (Top) → General Kernel Options → Multi-threading

.. code-block:: kconfig

    config NUM_PREEMPT_PRIORITIES
    	int "Number of preemptible priorities" if MULTITHREADING
    	range 0 128
    	default 0 if !MULTITHREADING
    	default 15
    	help
    	  Number of preemptible priorities available in the system. Gives access
    	  to priorities 0 to CONFIG_NUM_PREEMPT_PRIORITIES - 1.
	  
    	  This can be set to 0 to disable preemptible scheduling.
	  
    	  The total number of priorities is
	  
    	   NUM_COOP_PRIORITIES + NUM_PREEMPT_PRIORITIES + 1
	  
    	  The extra one is for the idle thread, which must run at the lowest
    	  priority, and be the only thread at that priority.

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