| Commit message (Collapse) | Author | Age | Files | Lines |
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Only register ask for help requests in the scheduler unblock and yield
operations. The actual ask for help operation is carried out during
_Thread_Do_dispatch() on a processor related to the thread. This yields
a better separation of scheduler instances. A thread of one scheduler
instance should not be forced to carry out too much work for threads on
other scheduler instances.
Update #2556.
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Update #2556.
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Changed for consistency with other scheduler operations.
Update #2556.
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Avoid direct access to thread internal data fields.
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A 32-bit Priority_Control limits the uptime to 49 days with a 1ms clock
tick in case the EDF scheduler is used. Increase it to 64-bit to enable
proper operation of the EDF scheduler,
Close 2173.
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The thread priority is manifest in two independent areas. One area is
the user visible thread priority along with a potential thread queue.
The other is the scheduler. Currently, a thread priority update via
_Thread_Change_priority() first updates the user visble thread priority
and the thread queue, then the scheduler is notified if necessary. The
priority is passed to the scheduler via a local variable. A generation
counter ensures that the scheduler discards out-of-date priorities.
This use of a local variable ties the update in these two areas close
together. For later enhancements and the OMIP locking protocol
implementation we need more flexibility. Add a thread priority
information block to Scheduler_Node and synchronize priority value
updates via a sequence lock on SMP configurations.
Update #2556.
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Previously, the _Thread_Heir was updated unconditionally in case a new
heir was determined. The _Thread_Dispatch_necessary was only updated in
case the executing thread was preemptible or an internal thread was
unblocked. Change this to update the _Thread_Heir and
_Thread_Dispatch_necessary only in case the currently selected heir
thread is preemptible or a dispatch is forced. Move the schedule
decision into the change priority operation and use the schedule
operation only in rtems_task_mode() in case preemption is enabled or an
ASR dispatch is necessary. This is a behaviour change. Previously, the
RTEMS_NO_PREEMPT also prevented signal delivery in certain cases (not
always). Now, signal delivery is no longer influenced by
RTEMS_NO_PREEMPT. Since the currently selected heir thread is used to
determine if a new heir is chosen, non-preemptible heir threads
currently not executing now prevent a new heir. This may have an
application impact, see change test tm04. Document this change in sp04.
Update #2273.
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Return a thread in need for help for the following scheduler operations
- unblock,
- change priority, and
- yield.
A thread in need for help is a thread that encounters a scheduler state
change from scheduled to ready or a thread that cannot be scheduled in
an unblock operation. Such a thread can ask threads which depend on
resources owned by this thread for help.
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This emphasizes that the scheduler node of a thread is returned and this
is not a function working with scheduler nodes like the other *_Node_*()
functions.
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This reduces the API to the minimum data structures to maximize the
re-usability.
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Rename scheduler per-thread information into scheduler nodes using
Scheduler_Node as the base type. Use inheritance for specialized
schedulers.
Move the scheduler specific states from the thread control block into
the scheduler node structure.
Validate the SMP scheduler node state transitions in case RTEMS_DEBUG is
defined.
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Do not allocate the scheduler control structures from the workspace.
This is a preparation step for configuration of clustered/partitioned
schedulers on SMP.
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Scheduler operations must be free of a global scheduler context to
enable partitioned/clustered scheduling.
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Delete global variables _Priority_Major_bit_map and _Priority_Bit_map.
This makes it possible to use multiple priority scheduler instances for
example with clustered/partitioned scheduling on SMP.
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Move implementation specific parts of schedulerpriority.h and
schedulerpriority.inl into new header file schedulerpriorityimpl.h. The
schedulerpriority.h contains now only the application visible API.
Add missing includes. Remove superfluous includes.
Move declaration of _Priority_Bit_map to prioritybitmap.inl since this
variable is used only here.
Remove second declaration of _Priority_Major_bit_map.
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This patch is a task from GCI 2012 which improves the Doxygen
comments in the RTEMS source.
http://www.google-melange.com/gci/task/view/google/gci2012/7982215
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Script does what is expected and tries to do it as
smartly as possible.
+ remove occurrences of two blank comment lines
next to each other after Id string line removed.
+ remove entire comment blocks which only exited to
contain CVS Ids
+ If the processing left a blank line at the top of
a file, it was removed.
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* sapi/include/confdefs.h, score/Makefile.am,
score/include/rtems/score/scheduler.h,
score/include/rtems/score/schedulerpriority.h,
score/include/rtems/score/thread.h,
score/inline/rtems/score/scheduler.inl,
score/inline/rtems/score/schedulerpriority.inl,
score/src/scheduler.c, score/src/schedulerpriority.c,
score/src/schedulerpriorityblock.c,
score/src/schedulerpriorityschedule.c,
score/src/schedulerpriorityunblock.c,
score/src/schedulerpriorityyield.c, score/src/threadchangepriority.c,
score/src/threadclose.c, score/src/threadinitialize.c,
score/src/threadsetpriority.c, score/src/threadsettransient.c:
Significant clean up on Scheduler Plugin Interface. Names were
shortened. Missing operations added. Many scheduler files had
unneeded includes removed. Made pointer to scheduler information in
Thread_Control and Scheduler_Control a void * pointer because the
thread and scheduler wrapper should be unaware of scheduler types AND
this is broken for user provided schedulers.
* score/src/schedulerpriorityallocate.c,
score/src/schedulerpriorityenqueue.c,
score/src/schedulerpriorityenqueuefirst.c,
score/src/schedulerpriorityextract.c,
score/src/schedulerpriorityfree.c,
score/src/schedulerpriorityupdate.c: New files.
* score/src/schedulerprioritythreadschedulerallocate.c,
score/src/schedulerprioritythreadschedulerfree.c,
score/src/schedulerprioritythreadschedulerupdate.c: Removed.
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* sapi/include/confdefs.h, sapi/include/rtems/config.h,
score/include/rtems/score/scheduler.h,
score/include/rtems/score/schedulerpriority.h,
score/inline/rtems/score/scheduler.inl,
score/inline/rtems/score/schedulerpriority.inl,
score/src/scheduler.c, score/src/schedulerpriority.c,
score/src/schedulerpriorityblock.c,
score/src/schedulerpriorityschedule.c,
score/src/schedulerprioritythreadschedulerallocate.c,
score/src/schedulerprioritythreadschedulerfree.c,
score/src/schedulerprioritythreadschedulerupdate.c,
score/src/schedulerpriorityunblock.c,
score/src/schedulerpriorityyield.c, score/src/threadchangepriority.c,
score/src/threadclearstate.c, score/src/threadclose.c,
score/src/threadinitialize.c, score/src/threadready.c,
score/src/threadresume.c, score/src/threadsetpriority.c,
score/src/threadsetstate.c, score/src/threadsuspend.c: Simplify the
pluggable scheduler interface. Its configuration made a table
of available schedulers and set a pointer to one of the.
This was heavy handed since you can only use one scheduler
in an application. This configuration mechanism resulted in a
scheduler pointer being passed around when you could put all
scheduler configuration in an initialized structure.
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* include/rtems/bspIo.h, include/rtems/concat.h, include/rtems/irq.h,
score/cpu/i386/rtems/score/idtr.h,
score/cpu/powerpc/rtems/powerpc/registers.h,
score/src/objectidtoname.c, score/src/schedulerpriorityblock.c,
score/src/schedulerpriorityschedule.c,
score/src/schedulerpriorityunblock.c,
score/src/schedulerpriorityyield.c, score/src/thread.c,
score/src/threadchangepriority.c, score/src/threadclearstate.c,
score/src/threadclose.c, score/src/threadcreateidle.c,
score/src/threaddelayended.c, score/src/threaddispatch.c,
score/src/threadget.c, score/src/threadhandler.c,
score/src/threadinitialize.c, score/src/threadloadenv.c,
score/src/threadready.c, score/src/threadreset.c,
score/src/threadrestart.c, score/src/threadresume.c,
score/src/threadsetpriority.c, score/src/threadsetstate.c,
score/src/threadsettransient.c, score/src/threadstackallocate.c,
score/src/threadstackfree.c, score/src/threadstart.c,
score/src/threadstartmultitasking.c, score/src/threadsuspend.c,
score/src/threadtickletimeslice.c, score/src/threadyieldprocessor.c:
Fix typo where license said found in found in.
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PR 1647/cpukit
* posix/src/nanosleep.c, posix/src/sched_yield.c,
rtems/src/taskwakeafter.c, sapi/include/confdefs.h,
sapi/include/rtems/config.h, sapi/src/exinit.c, score/Makefile.am,
score/preinstall.am, score/include/rtems/score/prioritybitmap.h,
score/include/rtems/score/thread.h,
score/inline/rtems/score/thread.inl, score/src/thread.c,
score/src/threadchangepriority.c, score/src/threadclearstate.c,
score/src/threadclose.c, score/src/threadinitialize.c,
score/src/threadready.c, score/src/threadresume.c,
score/src/threadsetpriority.c, score/src/threadsetstate.c,
score/src/threadsettransient.c, score/src/threadsuspend.c,
score/src/threadtickletimeslice.c: Refactor scheduler out of thread
handler to facilitate alternate scheduler implementations.
* score/src/threadyieldprocessor.c: Removed.
* score/src/schedulerprioritythreadschedulerupdate.c,
score/src/schedulerprioritythreadschedulerfree.c,
score/src/schedulerpriorityblock.c, score/src/scheduler.c,
score/src/schedulerprioritythreadschedulerallocate.c,
score/src/schedulerpriorityunblock.c,
score/src/schedulerpriority.c, score/src/schedulerpriorityyield.c,
score/include/rtems/score/schedulerpriority.h,
score/include/rtems/score/scheduler.h,
score/inline/rtems/score/scheduler.inl,
score/inline/rtems/score/schedulerpriority.inl: New files.
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