:orphan:

.. title:: CONFIG_NET_TC_TX_COUNT

.. kconfig:: CONFIG_NET_TC_TX_COUNT

CONFIG_NET_TC_TX_COUNT
######################

*How many Tx traffic classes to have for each network device*

Type: ``int``

Help
====

.. code-block:: none

    Define how many Tx traffic classes (queues) the system should have
    when sending a network packet. The network packet priority can then
    be mapped to this traffic class so that higher prioritized packets
    can be processed before lower prioritized ones. Each queue is handled
    by a separate thread which will need RAM for stack space.
    Only increase the value from 1 if you really need this feature.
    The default value is 1 which means that all the network traffic is
    handled equally. In this implementation, the higher traffic class
    value corresponds to lower thread priority.
    If you select 0 here, then it means that all the network traffic
    is pushed to the driver directly without any queues.
    Note that if USERSPACE support is enabled, then currently we need to
    enable at least 1 TX thread.

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

!\ :kconfig:`NET_RAW_MODE <CONFIG_NET_RAW_MODE>` && \ :kconfig:`NETWORKING <CONFIG_NETWORKING>`

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

Defaults
========

- 1 if \ :kconfig:`USERSPACE <CONFIG_USERSPACE>` || \ :kconfig:`USB_DEVICE_NETWORK <CONFIG_USB_DEVICE_NETWORK>`
- 0

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



At ``<Zephyr Subsystem>/net/ip/Kconfig:141``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:44`` → ``<Zephyr Subsystem>/Kconfig:39`` → ``<Zephyr Subsystem>/net/Kconfig:87``

Menu path: (Top) → Sub Systems and OS Services → Networking → Link layer and IP networking support → IP stack

.. code-block:: kconfig

    config NET_TC_TX_COUNT
    	int "How many Tx traffic classes to have for each network device"
    	range 1 NET_TC_NUM_PRIORITIES if NET_TC_NUM_PRIORITIES <= 8 && USERSPACE
    	range 0 NET_TC_NUM_PRIORITIES if NET_TC_NUM_PRIORITIES <= 8
    	range 1 8 if USERSPACE
    	range 0 8
    	default 1 if USERSPACE || USB_DEVICE_NETWORK
    	default 0
    	depends on !NET_RAW_MODE && NETWORKING
    	help
    	  Define how many Tx traffic classes (queues) the system should have
    	  when sending a network packet. The network packet priority can then
    	  be mapped to this traffic class so that higher prioritized packets
    	  can be processed before lower prioritized ones. Each queue is handled
    	  by a separate thread which will need RAM for stack space.
    	  Only increase the value from 1 if you really need this feature.
    	  The default value is 1 which means that all the network traffic is
    	  handled equally. In this implementation, the higher traffic class
    	  value corresponds to lower thread priority.
    	  If you select 0 here, then it means that all the network traffic
    	  is pushed to the driver directly without any queues.
    	  Note that if USERSPACE support is enabled, then currently we need to
    	  enable at least 1 TX thread.

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