mirror of
https://git.rtems.org/rtems-docs/
synced 2025-07-25 06:23:14 +08:00
Sebastian Huber
parent
38032b0cca
commit
275f4a049c
@ -1,6 +1,5 @@
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.. SPDX-License-Identifier: CC-BY-SA-4.0
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.. SPDX-License-Identifier: CC-BY-SA-4.0
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.. Copyright (C) 2010 Gedare Bloom
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.. Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
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.. Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
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.. index:: configuring a system
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.. index:: configuring a system
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@ -23,391 +22,7 @@ Configuring a System
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bdbuf
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bdbuf
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bsp-related
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bsp-related
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idle-task
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idle-task
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scheduler-general
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General Scheduler Configuration
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===============================
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This section defines the configuration parameters related to selecting a
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scheduling algorithm for an application. A scheduler configuration is optional
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and only necessary in very specific circumstances. A normal application
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configuration does not need any of the configuration options described in this
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section. By default, the :ref:`Deterministic Priority Scheduler
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<SchedulerPriority>` algorithm is used in uniprocessor configurations. In case
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SMP is enabled and the configured maximum processors
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(:ref:`CONFIGURE_MAXIMUM_PROCESSORS <CONFIGURE_MAXIMUM_PROCESSORS>`) is greater
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than one, then the :ref:`Earliest Deadline First (EDF) SMP Scheduler
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<SchedulerSMPEDF>` is selected as the default scheduler algorithm.
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For the :ref:`schedulers built into
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RTEMS <SchedulingConcepts>`, the configuration is straightforward. All that is
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required is to define the configuration macro which specifies which scheduler
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you want for in your application.
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The pluggable scheduler interface also enables the user to provide their own
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scheduling algorithm. If you choose to do this, you must define multiple
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configuration macros.
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.. index:: CONFIGURE_SCHEDULER_CBS
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.. _CONFIGURE_SCHEDULER_CBS:
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CONFIGURE_SCHEDULER_CBS
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-----------------------
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CONSTANT:
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``CONFIGURE_SCHEDULER_CBS``
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DATA TYPE:
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Boolean feature macro.
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RANGE:
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Defined or undefined.
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DEFAULT VALUE:
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This is not defined by default.
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DESCRIPTION:
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If defined, then the :ref:`Constant Bandwidth Server (CBS) Scheduler
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<SchedulerCBS>` algorithm is made available to the application.
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NOTES:
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This scheduler configuration option is an advanced configuration option.
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Think twice before you use it.
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In case no explicit :ref:`clustered scheduler configuration
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<ConfigurationSchedulersClustered>` is present, then it is used as the
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scheduler for exactly one processor.
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.. index:: CONFIGURE_SCHEDULER_EDF
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.. _CONFIGURE_SCHEDULER_EDF:
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CONFIGURE_SCHEDULER_EDF
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-----------------------
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CONSTANT:
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``CONFIGURE_SCHEDULER_EDF``
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DATA TYPE:
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Boolean feature macro.
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RANGE:
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Defined or undefined.
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DEFAULT VALUE:
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This is not defined by default.
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DESCRIPTION:
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If defined, then the :ref:`Earliest Deadline First (EDF) Scheduler
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<SchedulerEDF>` algorithm is made available to the application.
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NOTES:
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This scheduler configuration option is an advanced configuration option.
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Think twice before you use it.
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In case no explicit :ref:`clustered scheduler configuration
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<ConfigurationSchedulersClustered>` is present, then it is used as the
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scheduler for exactly one processor.
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.. index:: CONFIGURE_SCHEDULER_EDF_SMP
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.. _CONFIGURE_SCHEDULER_EDF_SMP:
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CONFIGURE_SCHEDULER_EDF_SMP
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---------------------------
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CONSTANT:
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``CONFIGURE_SCHEDULER_EDF_SMP``
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DATA TYPE:
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Boolean feature macro.
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RANGE:
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Defined or undefined.
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DEFAULT VALUE:
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This is not defined by default.
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DESCRIPTION:
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If defined, then the :ref:`Earliest Deadline First (EDF) SMP Scheduler
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<SchedulerSMPEDF>` algorithm is made available to the application.
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NOTES:
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This scheduler configuration option is an advanced configuration option.
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Think twice before you use it.
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This scheduler algorithm is only available when RTEMS is built with SMP
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support enabled.
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In case no explicit :ref:`clustered scheduler configuration
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<ConfigurationSchedulersClustered>` is present, then it is used as the
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scheduler for up to 32 processors.
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This scheduler algorithm is the default in SMP configurations if
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:ref:`CONFIGURE_MAXIMUM_PROCESSORS <CONFIGURE_MAXIMUM_PROCESSORS>` is
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greater than one.
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.. index:: CONFIGURE_SCHEDULER_NAME
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.. _CONFIGURE_SCHEDULER_NAME:
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CONFIGURE_SCHEDULER_NAME
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------------------------
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CONSTANT:
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``CONFIGURE_SCHEDULER_NAME``
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DATA TYPE:
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RTEMS Name (``rtems_name``).
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RANGE:
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Any value.
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DEFAULT VALUE:
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The default name is
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- ``"MEDF"`` for the :ref:`EDF SMP Scheduler <SchedulerSMPEDF>`,
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- ``"MPA "`` for the :ref:`Arbitrary Processor Affinity Priority SMP Scheduler <SchedulerSMPPriorityAffinity>`,
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- ``"MPD "`` for the :ref:`Deterministic Priority SMP Scheduler <SchedulerSMPPriority>`,
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- ``"MPS "`` for the :ref:`Simple Priority SMP Scheduler <SchedulerSMPPrioritySimple>`,
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- ``"UCBS"`` for the :ref:`Uniprocessor CBS Scheduler <SchedulerCBS>`,
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- ``"UEDF"`` for the :ref:`Uniprocessor EDF Scheduler <SchedulerEDF>`,
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- ``"UPD "`` for the :ref:`Uniprocessor Deterministic Priority Scheduler <SchedulerPriority>`, and
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- ``"UPS "`` for the :ref:`Uniprocessor Simple Priority Scheduler <SchedulerPrioritySimple>`.
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DESCRIPTION:
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Schedulers can be identified via ``rtems_scheduler_ident``. The name of
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the scheduler is determined by the configuration.
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NOTES:
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This scheduler configuration option is an advanced configuration option.
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Think twice before you use it.
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.. index:: CONFIGURE_SCHEDULER_PRIORITY
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.. _CONFIGURE_SCHEDULER_PRIORITY:
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CONFIGURE_SCHEDULER_PRIORITY
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----------------------------
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CONSTANT:
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``CONFIGURE_SCHEDULER_PRIORITY``
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DATA TYPE:
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Boolean feature macro.
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RANGE:
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Defined or undefined.
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DEFAULT VALUE:
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This is defined by default. This is the default scheduler and specifying
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this configuration parameter is redundant.
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DESCRIPTION:
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If defined, then the :ref:`Deterministic Priority Scheduler
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<SchedulerPriority>` algorithm is made available to the application.
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NOTES:
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This scheduler configuration option is an advanced configuration option.
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Think twice before you use it.
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In case no explicit :ref:`clustered scheduler configuration
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<ConfigurationSchedulersClustered>` is present, then it is used as the
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scheduler for exactly one processor.
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This scheduler algorithm is the default when
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:ref:`CONFIGURE_MAXIMUM_PROCESSORS <CONFIGURE_MAXIMUM_PROCESSORS>` is
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exactly one.
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The memory allocated for this scheduler depends on the
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:ref:`CONFIGURE_MAXIMUM_PRIORITY` configuration option.
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.. index:: CONFIGURE_SCHEDULER_PRIORITY_AFFINITY_SMP
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.. _CONFIGURE_SCHEDULER_PRIORITY_AFFINITY_SMP:
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CONFIGURE_SCHEDULER_PRIORITY_AFFINITY_SMP
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-----------------------------------------
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CONSTANT:
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``CONFIGURE_SCHEDULER_PRIORITY_AFFINITY_SMP``
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DATA TYPE:
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Boolean feature macro.
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RANGE:
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Defined or undefined.
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DEFAULT VALUE:
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This is not defined by default.
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DESCRIPTION:
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If defined, then the :ref:`Arbitrary Processor Affinity SMP Scheduler
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<SchedulerSMPPriorityAffinity>` algorithm is made available to the
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application.
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NOTES:
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This scheduler configuration option is an advanced configuration option.
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Think twice before you use it.
|
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|
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This scheduler algorithm is only available when RTEMS is built with SMP
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support enabled.
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In case no explicit :ref:`clustered scheduler configuration
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<ConfigurationSchedulersClustered>` is present, then it is used as the
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scheduler for up to 32 processors.
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The memory allocated for this scheduler depends on the
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:ref:`CONFIGURE_MAXIMUM_PRIORITY` configuration option.
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.. index:: CONFIGURE_SCHEDULER_PRIORITY_SMP
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.. _CONFIGURE_SCHEDULER_PRIORITY_SMP:
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CONFIGURE_SCHEDULER_PRIORITY_SMP
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--------------------------------
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CONSTANT:
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``CONFIGURE_SCHEDULER_PRIORITY_SMP``
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DATA TYPE:
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Boolean feature macro.
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RANGE:
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Defined or undefined.
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DEFAULT VALUE:
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This is not defined by default.
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DESCRIPTION:
|
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If defined, then the :ref:`Deterministic Priority SMP Scheduler
|
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<SchedulerSMPPriority>` algorithm is made available to the application.
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|
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NOTES:
|
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This scheduler configuration option is an advanced configuration option.
|
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Think twice before you use it.
|
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|
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This scheduler algorithm is only available when RTEMS is built with SMP
|
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support enabled.
|
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|
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In case no explicit :ref:`clustered scheduler configuration
|
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<ConfigurationSchedulersClustered>` is present, then it is used as the
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scheduler for up to 32 processors.
|
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|
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The memory allocated for this scheduler depends on the
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:ref:`CONFIGURE_MAXIMUM_PRIORITY` configuration option.
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|
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.. index:: CONFIGURE_SCHEDULER_SIMPLE
|
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|
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.. _CONFIGURE_SCHEDULER_SIMPLE:
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|
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CONFIGURE_SCHEDULER_SIMPLE
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--------------------------
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|
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CONSTANT:
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``CONFIGURE_SCHEDULER_SIMPLE``
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|
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DATA TYPE:
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Boolean feature macro.
|
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|
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RANGE:
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Defined or undefined.
|
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|
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DEFAULT VALUE:
|
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This is not defined by default.
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|
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DESCRIPTION:
|
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If defined, then the :ref:`Simple Priority Scheduler
|
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<SchedulerPrioritySimple>` algorithm is made available to the application.
|
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|
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NOTES:
|
|
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This scheduler configuration option is an advanced configuration option.
|
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Think twice before you use it.
|
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|
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In case no explicit :ref:`clustered scheduler configuration
|
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<ConfigurationSchedulersClustered>` is present, then it is used as the
|
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scheduler for exactly one processor.
|
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|
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.. index:: CONFIGURE_SCHEDULER_SIMPLE_SMP
|
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|
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.. _CONFIGURE_SCHEDULER_SIMPLE_SMP:
|
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|
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CONFIGURE_SCHEDULER_SIMPLE_SMP
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------------------------------
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|
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CONSTANT:
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``CONFIGURE_SCHEDULER_SIMPLE_SMP``
|
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|
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DATA TYPE:
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Boolean feature macro.
|
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|
|
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RANGE:
|
|
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Defined or undefined.
|
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|
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DEFAULT VALUE:
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This is not defined by default.
|
|
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|
|
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DESCRIPTION:
|
|
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If defined, then the :ref:`Simple Priority SMP Scheduler
|
|
||||||
<SchedulerSMPPrioritySimple>` algorithm is made available to the
|
|
||||||
application.
|
|
||||||
|
|
||||||
NOTES:
|
|
||||||
This scheduler configuration option is an advanced configuration option.
|
|
||||||
Think twice before you use it.
|
|
||||||
|
|
||||||
This scheduler algorithm is only available when RTEMS is built with SMP
|
|
||||||
support enabled.
|
|
||||||
|
|
||||||
In case no explicit :ref:`clustered scheduler configuration
|
|
||||||
<ConfigurationSchedulersClustered>` is present, then it is used as the
|
|
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scheduler for up to 32 processors.
|
|
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|
|
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.. index:: CONFIGURE_SCHEDULER_USER
|
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|
|
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.. _CONFIGURE_SCHEDULER_USER:
|
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|
|
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CONFIGURE_SCHEDULER_USER
|
|
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------------------------
|
|
||||||
|
|
||||||
CONSTANT:
|
|
||||||
``CONFIGURE_SCHEDULER_USER``
|
|
||||||
|
|
||||||
DATA TYPE:
|
|
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Boolean feature macro.
|
|
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|
|
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RANGE:
|
|
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Defined or undefined.
|
|
||||||
|
|
||||||
DEFAULT VALUE:
|
|
||||||
This is not defined by default.
|
|
||||||
|
|
||||||
DESCRIPTION:
|
|
||||||
RTEMS allows the application to provide its own task/thread scheduling
|
|
||||||
algorithm. In order to do this, one must define
|
|
||||||
``CONFIGURE_SCHEDULER_USER`` to indicate the application provides its own
|
|
||||||
scheduling algorithm. If ``CONFIGURE_SCHEDULER_USER`` is defined then the
|
|
||||||
following additional macros must be defined:
|
|
||||||
|
|
||||||
- ``CONFIGURE_SCHEDULER`` must be defined to a static definition of
|
|
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the scheduler data structures of the user scheduler.
|
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|
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- ``CONFIGURE_SCHEDULER_TABLE_ENTRIES`` must be defined to a scheduler
|
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table entry initializer for the user scheduler.
|
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|
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- ``CONFIGURE_SCHEDULER_USER_PER_THREAD`` must be defined to the type of
|
|
||||||
the per-thread information of the user scheduler.
|
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||||||
|
|
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NOTES:
|
|
||||||
This scheduler configuration option is an advanced configuration option.
|
|
||||||
Think twice before you use it.
|
|
||||||
|
|
||||||
At this time, the mechanics and requirements for writing a new scheduler
|
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are evolving and not fully documented. It is recommended that you look at
|
|
||||||
the existing Deterministic Priority Scheduler in
|
|
||||||
``cpukit/score/src/schedulerpriority*.c`` for guidance. For guidance on
|
|
||||||
the configuration macros, please examine ``cpukit/sapi/include/confdefs.h``
|
|
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for how these are defined for the Deterministic Priority Scheduler.
|
|
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|
|
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.. _ConfigurationSchedulersClustered:
|
.. _ConfigurationSchedulersClustered:
|
||||||
|
|
||||||
|
|||||||
389
c-user/config/scheduler-general.rst
Normal file
389
c-user/config/scheduler-general.rst
Normal file
@ -0,0 +1,389 @@
|
|||||||
|
.. SPDX-License-Identifier: CC-BY-SA-4.0
|
||||||
|
|
||||||
|
.. Copyright (C) 2010 Gedare Bloom
|
||||||
|
.. Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
|
||||||
|
|
||||||
|
General Scheduler Configuration
|
||||||
|
===============================
|
||||||
|
|
||||||
|
This section defines the configuration parameters related to selecting a
|
||||||
|
scheduling algorithm for an application. A scheduler configuration is optional
|
||||||
|
and only necessary in very specific circumstances. A normal application
|
||||||
|
configuration does not need any of the configuration options described in this
|
||||||
|
section. By default, the :ref:`Deterministic Priority Scheduler
|
||||||
|
<SchedulerPriority>` algorithm is used in uniprocessor configurations. In case
|
||||||
|
SMP is enabled and the configured maximum processors
|
||||||
|
(:ref:`CONFIGURE_MAXIMUM_PROCESSORS <CONFIGURE_MAXIMUM_PROCESSORS>`) is greater
|
||||||
|
than one, then the :ref:`Earliest Deadline First (EDF) SMP Scheduler
|
||||||
|
<SchedulerSMPEDF>` is selected as the default scheduler algorithm.
|
||||||
|
|
||||||
|
For the :ref:`schedulers built into
|
||||||
|
RTEMS <SchedulingConcepts>`, the configuration is straightforward. All that is
|
||||||
|
required is to define the configuration macro which specifies which scheduler
|
||||||
|
you want for in your application.
|
||||||
|
|
||||||
|
The pluggable scheduler interface also enables the user to provide their own
|
||||||
|
scheduling algorithm. If you choose to do this, you must define multiple
|
||||||
|
configuration macros.
|
||||||
|
|
||||||
|
.. index:: CONFIGURE_SCHEDULER_CBS
|
||||||
|
|
||||||
|
.. _CONFIGURE_SCHEDULER_CBS:
|
||||||
|
|
||||||
|
CONFIGURE_SCHEDULER_CBS
|
||||||
|
-----------------------
|
||||||
|
|
||||||
|
CONSTANT:
|
||||||
|
``CONFIGURE_SCHEDULER_CBS``
|
||||||
|
|
||||||
|
DATA TYPE:
|
||||||
|
Boolean feature macro.
|
||||||
|
|
||||||
|
RANGE:
|
||||||
|
Defined or undefined.
|
||||||
|
|
||||||
|
DEFAULT VALUE:
|
||||||
|
This is not defined by default.
|
||||||
|
|
||||||
|
DESCRIPTION:
|
||||||
|
If defined, then the :ref:`Constant Bandwidth Server (CBS) Scheduler
|
||||||
|
<SchedulerCBS>` algorithm is made available to the application.
|
||||||
|
|
||||||
|
NOTES:
|
||||||
|
This scheduler configuration option is an advanced configuration option.
|
||||||
|
Think twice before you use it.
|
||||||
|
|
||||||
|
In case no explicit :ref:`clustered scheduler configuration
|
||||||
|
<ConfigurationSchedulersClustered>` is present, then it is used as the
|
||||||
|
scheduler for exactly one processor.
|
||||||
|
|
||||||
|
.. index:: CONFIGURE_SCHEDULER_EDF
|
||||||
|
|
||||||
|
.. _CONFIGURE_SCHEDULER_EDF:
|
||||||
|
|
||||||
|
CONFIGURE_SCHEDULER_EDF
|
||||||
|
-----------------------
|
||||||
|
|
||||||
|
CONSTANT:
|
||||||
|
``CONFIGURE_SCHEDULER_EDF``
|
||||||
|
|
||||||
|
DATA TYPE:
|
||||||
|
Boolean feature macro.
|
||||||
|
|
||||||
|
RANGE:
|
||||||
|
Defined or undefined.
|
||||||
|
|
||||||
|
DEFAULT VALUE:
|
||||||
|
This is not defined by default.
|
||||||
|
|
||||||
|
DESCRIPTION:
|
||||||
|
If defined, then the :ref:`Earliest Deadline First (EDF) Scheduler
|
||||||
|
<SchedulerEDF>` algorithm is made available to the application.
|
||||||
|
|
||||||
|
NOTES:
|
||||||
|
This scheduler configuration option is an advanced configuration option.
|
||||||
|
Think twice before you use it.
|
||||||
|
|
||||||
|
In case no explicit :ref:`clustered scheduler configuration
|
||||||
|
<ConfigurationSchedulersClustered>` is present, then it is used as the
|
||||||
|
scheduler for exactly one processor.
|
||||||
|
|
||||||
|
.. index:: CONFIGURE_SCHEDULER_EDF_SMP
|
||||||
|
|
||||||
|
.. _CONFIGURE_SCHEDULER_EDF_SMP:
|
||||||
|
|
||||||
|
CONFIGURE_SCHEDULER_EDF_SMP
|
||||||
|
---------------------------
|
||||||
|
|
||||||
|
CONSTANT:
|
||||||
|
``CONFIGURE_SCHEDULER_EDF_SMP``
|
||||||
|
|
||||||
|
DATA TYPE:
|
||||||
|
Boolean feature macro.
|
||||||
|
|
||||||
|
RANGE:
|
||||||
|
Defined or undefined.
|
||||||
|
|
||||||
|
DEFAULT VALUE:
|
||||||
|
This is not defined by default.
|
||||||
|
|
||||||
|
DESCRIPTION:
|
||||||
|
If defined, then the :ref:`Earliest Deadline First (EDF) SMP Scheduler
|
||||||
|
<SchedulerSMPEDF>` algorithm is made available to the application.
|
||||||
|
|
||||||
|
NOTES:
|
||||||
|
This scheduler configuration option is an advanced configuration option.
|
||||||
|
Think twice before you use it.
|
||||||
|
|
||||||
|
This scheduler algorithm is only available when RTEMS is built with SMP
|
||||||
|
support enabled.
|
||||||
|
|
||||||
|
In case no explicit :ref:`clustered scheduler configuration
|
||||||
|
<ConfigurationSchedulersClustered>` is present, then it is used as the
|
||||||
|
scheduler for up to 32 processors.
|
||||||
|
|
||||||
|
This scheduler algorithm is the default in SMP configurations if
|
||||||
|
:ref:`CONFIGURE_MAXIMUM_PROCESSORS <CONFIGURE_MAXIMUM_PROCESSORS>` is
|
||||||
|
greater than one.
|
||||||
|
|
||||||
|
.. index:: CONFIGURE_SCHEDULER_NAME
|
||||||
|
|
||||||
|
.. _CONFIGURE_SCHEDULER_NAME:
|
||||||
|
|
||||||
|
CONFIGURE_SCHEDULER_NAME
|
||||||
|
------------------------
|
||||||
|
|
||||||
|
CONSTANT:
|
||||||
|
``CONFIGURE_SCHEDULER_NAME``
|
||||||
|
|
||||||
|
DATA TYPE:
|
||||||
|
RTEMS Name (``rtems_name``).
|
||||||
|
|
||||||
|
RANGE:
|
||||||
|
Any value.
|
||||||
|
|
||||||
|
DEFAULT VALUE:
|
||||||
|
The default name is
|
||||||
|
|
||||||
|
- ``"MEDF"`` for the :ref:`EDF SMP Scheduler <SchedulerSMPEDF>`,
|
||||||
|
- ``"MPA "`` for the :ref:`Arbitrary Processor Affinity Priority SMP Scheduler <SchedulerSMPPriorityAffinity>`,
|
||||||
|
- ``"MPD "`` for the :ref:`Deterministic Priority SMP Scheduler <SchedulerSMPPriority>`,
|
||||||
|
- ``"MPS "`` for the :ref:`Simple Priority SMP Scheduler <SchedulerSMPPrioritySimple>`,
|
||||||
|
- ``"UCBS"`` for the :ref:`Uniprocessor CBS Scheduler <SchedulerCBS>`,
|
||||||
|
- ``"UEDF"`` for the :ref:`Uniprocessor EDF Scheduler <SchedulerEDF>`,
|
||||||
|
- ``"UPD "`` for the :ref:`Uniprocessor Deterministic Priority Scheduler <SchedulerPriority>`, and
|
||||||
|
- ``"UPS "`` for the :ref:`Uniprocessor Simple Priority Scheduler <SchedulerPrioritySimple>`.
|
||||||
|
|
||||||
|
DESCRIPTION:
|
||||||
|
Schedulers can be identified via ``rtems_scheduler_ident``. The name of
|
||||||
|
the scheduler is determined by the configuration.
|
||||||
|
|
||||||
|
NOTES:
|
||||||
|
This scheduler configuration option is an advanced configuration option.
|
||||||
|
Think twice before you use it.
|
||||||
|
|
||||||
|
.. index:: CONFIGURE_SCHEDULER_PRIORITY
|
||||||
|
|
||||||
|
.. _CONFIGURE_SCHEDULER_PRIORITY:
|
||||||
|
|
||||||
|
CONFIGURE_SCHEDULER_PRIORITY
|
||||||
|
----------------------------
|
||||||
|
|
||||||
|
CONSTANT:
|
||||||
|
``CONFIGURE_SCHEDULER_PRIORITY``
|
||||||
|
|
||||||
|
DATA TYPE:
|
||||||
|
Boolean feature macro.
|
||||||
|
|
||||||
|
RANGE:
|
||||||
|
Defined or undefined.
|
||||||
|
|
||||||
|
DEFAULT VALUE:
|
||||||
|
This is defined by default. This is the default scheduler and specifying
|
||||||
|
this configuration parameter is redundant.
|
||||||
|
|
||||||
|
DESCRIPTION:
|
||||||
|
If defined, then the :ref:`Deterministic Priority Scheduler
|
||||||
|
<SchedulerPriority>` algorithm is made available to the application.
|
||||||
|
|
||||||
|
NOTES:
|
||||||
|
This scheduler configuration option is an advanced configuration option.
|
||||||
|
Think twice before you use it.
|
||||||
|
|
||||||
|
In case no explicit :ref:`clustered scheduler configuration
|
||||||
|
<ConfigurationSchedulersClustered>` is present, then it is used as the
|
||||||
|
scheduler for exactly one processor.
|
||||||
|
|
||||||
|
This scheduler algorithm is the default when
|
||||||
|
:ref:`CONFIGURE_MAXIMUM_PROCESSORS <CONFIGURE_MAXIMUM_PROCESSORS>` is
|
||||||
|
exactly one.
|
||||||
|
|
||||||
|
The memory allocated for this scheduler depends on the
|
||||||
|
:ref:`CONFIGURE_MAXIMUM_PRIORITY` configuration option.
|
||||||
|
|
||||||
|
.. index:: CONFIGURE_SCHEDULER_PRIORITY_AFFINITY_SMP
|
||||||
|
|
||||||
|
.. _CONFIGURE_SCHEDULER_PRIORITY_AFFINITY_SMP:
|
||||||
|
|
||||||
|
CONFIGURE_SCHEDULER_PRIORITY_AFFINITY_SMP
|
||||||
|
-----------------------------------------
|
||||||
|
|
||||||
|
CONSTANT:
|
||||||
|
``CONFIGURE_SCHEDULER_PRIORITY_AFFINITY_SMP``
|
||||||
|
|
||||||
|
DATA TYPE:
|
||||||
|
Boolean feature macro.
|
||||||
|
|
||||||
|
RANGE:
|
||||||
|
Defined or undefined.
|
||||||
|
|
||||||
|
DEFAULT VALUE:
|
||||||
|
This is not defined by default.
|
||||||
|
|
||||||
|
DESCRIPTION:
|
||||||
|
If defined, then the :ref:`Arbitrary Processor Affinity SMP Scheduler
|
||||||
|
<SchedulerSMPPriorityAffinity>` algorithm is made available to the
|
||||||
|
application.
|
||||||
|
|
||||||
|
NOTES:
|
||||||
|
This scheduler configuration option is an advanced configuration option.
|
||||||
|
Think twice before you use it.
|
||||||
|
|
||||||
|
This scheduler algorithm is only available when RTEMS is built with SMP
|
||||||
|
support enabled.
|
||||||
|
|
||||||
|
In case no explicit :ref:`clustered scheduler configuration
|
||||||
|
<ConfigurationSchedulersClustered>` is present, then it is used as the
|
||||||
|
scheduler for up to 32 processors.
|
||||||
|
|
||||||
|
The memory allocated for this scheduler depends on the
|
||||||
|
:ref:`CONFIGURE_MAXIMUM_PRIORITY` configuration option.
|
||||||
|
|
||||||
|
.. index:: CONFIGURE_SCHEDULER_PRIORITY_SMP
|
||||||
|
|
||||||
|
.. _CONFIGURE_SCHEDULER_PRIORITY_SMP:
|
||||||
|
|
||||||
|
CONFIGURE_SCHEDULER_PRIORITY_SMP
|
||||||
|
--------------------------------
|
||||||
|
|
||||||
|
CONSTANT:
|
||||||
|
``CONFIGURE_SCHEDULER_PRIORITY_SMP``
|
||||||
|
|
||||||
|
DATA TYPE:
|
||||||
|
Boolean feature macro.
|
||||||
|
|
||||||
|
RANGE:
|
||||||
|
Defined or undefined.
|
||||||
|
|
||||||
|
DEFAULT VALUE:
|
||||||
|
This is not defined by default.
|
||||||
|
|
||||||
|
DESCRIPTION:
|
||||||
|
If defined, then the :ref:`Deterministic Priority SMP Scheduler
|
||||||
|
<SchedulerSMPPriority>` algorithm is made available to the application.
|
||||||
|
|
||||||
|
NOTES:
|
||||||
|
This scheduler configuration option is an advanced configuration option.
|
||||||
|
Think twice before you use it.
|
||||||
|
|
||||||
|
This scheduler algorithm is only available when RTEMS is built with SMP
|
||||||
|
support enabled.
|
||||||
|
|
||||||
|
In case no explicit :ref:`clustered scheduler configuration
|
||||||
|
<ConfigurationSchedulersClustered>` is present, then it is used as the
|
||||||
|
scheduler for up to 32 processors.
|
||||||
|
|
||||||
|
The memory allocated for this scheduler depends on the
|
||||||
|
:ref:`CONFIGURE_MAXIMUM_PRIORITY` configuration option.
|
||||||
|
|
||||||
|
.. index:: CONFIGURE_SCHEDULER_SIMPLE
|
||||||
|
|
||||||
|
.. _CONFIGURE_SCHEDULER_SIMPLE:
|
||||||
|
|
||||||
|
CONFIGURE_SCHEDULER_SIMPLE
|
||||||
|
--------------------------
|
||||||
|
|
||||||
|
CONSTANT:
|
||||||
|
``CONFIGURE_SCHEDULER_SIMPLE``
|
||||||
|
|
||||||
|
DATA TYPE:
|
||||||
|
Boolean feature macro.
|
||||||
|
|
||||||
|
RANGE:
|
||||||
|
Defined or undefined.
|
||||||
|
|
||||||
|
DEFAULT VALUE:
|
||||||
|
This is not defined by default.
|
||||||
|
|
||||||
|
DESCRIPTION:
|
||||||
|
If defined, then the :ref:`Simple Priority Scheduler
|
||||||
|
<SchedulerPrioritySimple>` algorithm is made available to the application.
|
||||||
|
|
||||||
|
NOTES:
|
||||||
|
This scheduler configuration option is an advanced configuration option.
|
||||||
|
Think twice before you use it.
|
||||||
|
|
||||||
|
In case no explicit :ref:`clustered scheduler configuration
|
||||||
|
<ConfigurationSchedulersClustered>` is present, then it is used as the
|
||||||
|
scheduler for exactly one processor.
|
||||||
|
|
||||||
|
.. index:: CONFIGURE_SCHEDULER_SIMPLE_SMP
|
||||||
|
|
||||||
|
.. _CONFIGURE_SCHEDULER_SIMPLE_SMP:
|
||||||
|
|
||||||
|
CONFIGURE_SCHEDULER_SIMPLE_SMP
|
||||||
|
------------------------------
|
||||||
|
|
||||||
|
CONSTANT:
|
||||||
|
``CONFIGURE_SCHEDULER_SIMPLE_SMP``
|
||||||
|
|
||||||
|
DATA TYPE:
|
||||||
|
Boolean feature macro.
|
||||||
|
|
||||||
|
RANGE:
|
||||||
|
Defined or undefined.
|
||||||
|
|
||||||
|
DEFAULT VALUE:
|
||||||
|
This is not defined by default.
|
||||||
|
|
||||||
|
DESCRIPTION:
|
||||||
|
If defined, then the :ref:`Simple Priority SMP Scheduler
|
||||||
|
<SchedulerSMPPrioritySimple>` algorithm is made available to the
|
||||||
|
application.
|
||||||
|
|
||||||
|
NOTES:
|
||||||
|
This scheduler configuration option is an advanced configuration option.
|
||||||
|
Think twice before you use it.
|
||||||
|
|
||||||
|
This scheduler algorithm is only available when RTEMS is built with SMP
|
||||||
|
support enabled.
|
||||||
|
|
||||||
|
In case no explicit :ref:`clustered scheduler configuration
|
||||||
|
<ConfigurationSchedulersClustered>` is present, then it is used as the
|
||||||
|
scheduler for up to 32 processors.
|
||||||
|
|
||||||
|
.. index:: CONFIGURE_SCHEDULER_USER
|
||||||
|
|
||||||
|
.. _CONFIGURE_SCHEDULER_USER:
|
||||||
|
|
||||||
|
CONFIGURE_SCHEDULER_USER
|
||||||
|
------------------------
|
||||||
|
|
||||||
|
CONSTANT:
|
||||||
|
``CONFIGURE_SCHEDULER_USER``
|
||||||
|
|
||||||
|
DATA TYPE:
|
||||||
|
Boolean feature macro.
|
||||||
|
|
||||||
|
RANGE:
|
||||||
|
Defined or undefined.
|
||||||
|
|
||||||
|
DEFAULT VALUE:
|
||||||
|
This is not defined by default.
|
||||||
|
|
||||||
|
DESCRIPTION:
|
||||||
|
RTEMS allows the application to provide its own task/thread scheduling
|
||||||
|
algorithm. In order to do this, one must define
|
||||||
|
``CONFIGURE_SCHEDULER_USER`` to indicate the application provides its own
|
||||||
|
scheduling algorithm. If ``CONFIGURE_SCHEDULER_USER`` is defined then the
|
||||||
|
following additional macros must be defined:
|
||||||
|
|
||||||
|
- ``CONFIGURE_SCHEDULER`` must be defined to a static definition of
|
||||||
|
the scheduler data structures of the user scheduler.
|
||||||
|
|
||||||
|
- ``CONFIGURE_SCHEDULER_TABLE_ENTRIES`` must be defined to a scheduler
|
||||||
|
table entry initializer for the user scheduler.
|
||||||
|
|
||||||
|
- ``CONFIGURE_SCHEDULER_USER_PER_THREAD`` must be defined to the type of
|
||||||
|
the per-thread information of the user scheduler.
|
||||||
|
|
||||||
|
NOTES:
|
||||||
|
This scheduler configuration option is an advanced configuration option.
|
||||||
|
Think twice before you use it.
|
||||||
|
|
||||||
|
At this time, the mechanics and requirements for writing a new scheduler
|
||||||
|
are evolving and not fully documented. It is recommended that you look at
|
||||||
|
the existing Deterministic Priority Scheduler in
|
||||||
|
``cpukit/score/src/schedulerpriority*.c`` for guidance. For guidance on
|
||||||
|
the configuration macros, please examine ``cpukit/sapi/include/confdefs.h``
|
||||||
|
for how these are defined for the Deterministic Priority Scheduler.
|
||||||
Loading…
x
Reference in New Issue
Block a user