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Diffstat (limited to '')
| -rw-r--r-- | doc/user/schedule.t | 45 |
1 files changed, 1 insertions, 44 deletions
diff --git a/doc/user/schedule.t b/doc/user/schedule.t index 80317082b4..aa187afb13 100644 --- a/doc/user/schedule.t +++ b/doc/user/schedule.t @@ -11,21 +11,8 @@ @c Figure 17-1 RTEMS Task State Transitions @c -@ifinfo -@node Scheduling Concepts, Scheduling Concepts Introduction, FATAL_ERROR_OCCURRED - Invoke the fatal error handler, Top -@end ifinfo @chapter Scheduling Concepts -@ifinfo -@menu -* Scheduling Concepts Introduction:: -* Scheduling Concepts Scheduling Mechanisms:: -* Scheduling Concepts Task State Transitions:: -@end menu -@end ifinfo - -@ifinfo -@node Scheduling Concepts Introduction, Scheduling Concepts Scheduling Mechanisms, Scheduling Concepts, Scheduling Concepts -@end ifinfo + @section Introduction The concept of scheduling in real-time systems @@ -60,19 +47,7 @@ chain is allocated the processor. RTEMS schedules tasks using the second method to guarantee faster response times to external events. -@ifinfo -@node Scheduling Concepts Scheduling Mechanisms, Task Priority and Scheduling, Scheduling Concepts Introduction, Scheduling Concepts -@end ifinfo @section Scheduling Mechanisms -@ifinfo -@menu -* Task Priority and Scheduling:: -* Preemption:: -* Timeslicing:: -* Manual Round-Robin:: -* Dispatching Tasks:: -@end menu -@end ifinfo RTEMS provides four mechanisms which allow the user to impact the task scheduling process: @@ -97,9 +72,6 @@ preemption (if enabled) of a task by higher priority tasks will occur as required, overriding the other factors presented in the description. -@ifinfo -@node Task Priority and Scheduling, Preemption, Scheduling Concepts Scheduling Mechanisms, Scheduling Concepts Scheduling Mechanisms -@end ifinfo @subsection Task Priority and Scheduling The most significant of these mechanisms is the @@ -121,9 +93,6 @@ priority task that is ready to run when allocating the processor to a task.} @end itemize -@ifinfo -@node Preemption, Timeslicing, Task Priority and Scheduling, Scheduling Concepts Scheduling Mechanisms -@end ifinfo @subsection Preemption Another way the user can alter the basic scheduling @@ -137,9 +106,6 @@ Note that the preemption setting has no effect on the manner in which a task is scheduled. It only applies once a task has control of the processor. -@ifinfo -@node Timeslicing, Manual Round-Robin, Preemption, Scheduling Concepts Scheduling Mechanisms -@end ifinfo @subsection Timeslicing Timeslicing or round-robin scheduling is an @@ -159,9 +125,6 @@ task will preempt the task (unless preemption is disabled) as soon as it is ready to run, even if the task has not used up its entire timeslice. -@ifinfo -@node Manual Round-Robin, Dispatching Tasks, Timeslicing, Scheduling Concepts Scheduling Mechanisms -@end ifinfo @subsection Manual Round-Robin The final mechanism for altering the RTEMS scheduling @@ -174,9 +137,6 @@ end of its priority group. If no other tasks of the same priority are ready to run, then the task does not lose control of the processor. -@ifinfo -@node Dispatching Tasks, Scheduling Concepts Task State Transitions, Manual Round-Robin, Scheduling Concepts Scheduling Mechanisms -@end ifinfo @subsection Dispatching Tasks The dispatcher is the RTEMS component responsible for @@ -205,9 +165,6 @@ operations, the state of the numeric coprocessor is only saved when a @code{@value{RPREFIX}FLOATING_POINT} task is dispatched and that task was not the last task to utilize the coprocessor. -@ifinfo -@node Scheduling Concepts Task State Transitions, Rate Monotonic Manager, Dispatching Tasks, Scheduling Concepts -@end ifinfo @section Task State Transitions Tasks in an RTEMS system must always be in one of the |