mirror of
https://git.rtems.org/rtems-docs/
synced 2025-06-06 04:20:29 +08:00
Sebastian Huber
parent
38032b0cca
commit
275f4a049c
@ -1,6 +1,5 @@
|
||||
.. SPDX-License-Identifier: CC-BY-SA-4.0
|
||||
|
||||
.. Copyright (C) 2010 Gedare Bloom
|
||||
.. Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
|
||||
|
||||
.. index:: configuring a system
|
||||
@ -23,391 +22,7 @@ Configuring a System
|
||||
bdbuf
|
||||
bsp-related
|
||||
idle-task
|
||||
|
||||
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.
|
||||
scheduler-general
|
||||
|
||||
.. _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