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Update #3056.
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Add priority nodes which contribute to the overall thread priority.
The actual priority of a thread is now an aggregation of priority nodes.
The thread priority aggregation for the home scheduler instance of a
thread consists of at least one priority node, which is normally the
real priority of the thread. The locking protocols (e.g. priority
ceiling and priority inheritance), rate-monotonic period objects and the
POSIX sporadic server add, change and remove priority nodes.
A thread changes its priority now immediately, e.g. priority changes are
not deferred until the thread releases its last resource.
Replace the _Thread_Change_priority() function with
* _Thread_Priority_perform_actions(),
* _Thread_Priority_add(),
* _Thread_Priority_remove(),
* _Thread_Priority_change(), and
* _Thread_Priority_update().
Update #2412.
Update #2556.
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Avoid direct access to thread internal data fields.
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Split up the potential thread priority change in the scheduler
release/cancel job operation. Protect the rate monotonic period state
with a dedicated SMP lock. This avoids a race condition during
_Rate_monotonic_Timeout() while _Rate_monotonic_Cancel() is called on
another processor.
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Commit 21bdca49eea9213cc31a497072d01192eed8675e accidentally used a
function which may be added later.
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Do not use a deadline value of zero to indicate a job cancellation. Use
a dedicated scheduler operation for this.
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Use inline red-black tree insert. Do not use shifting priorities since
this is not supported by the thread queues. Due to the 32-bit
Priority_Control this currently limits the uptime to 49days with a 1ms
clock tick.
Update #2173.
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Pass the deadline in watchdog ticks to the scheduler.
Update #2173.
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Move the writes to Thread_Control::current_priority and
Thread_Control::real_priority into _Thread_Change_priority() under the
protection of the thread lock. Add a filter function to
_Thread_Change_priority() to enable specialized variants.
Avoid race conditions during a thread priority restore with the new
Thread_Control::priority_restore_hint for an important average case
optimizations used by priority inheritance mutexes.
Update #2273.
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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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Move implementation specific parts of thread.h and thread.inl into new
header file threadimpl.h. The thread.h contains now only the
application visible API.
Remove superfluous header file includes from various files.
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Move implementation specific parts of watchdog.h and watchdog.inl into
new header file watchdogimpl.h. The watchdog.h contains now only the
application visible API.
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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/gci2012/7970221
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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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PR 1896/cpukit
* sapi/include/confdefs.h, score/Makefile.am, score/preinstall.am: Add
Earliest Deadline First (EDF) Scheduling Algorithm implementation.
* score/include/rtems/score/scheduleredf.h, score/src/scheduleredf.c,
score/src/scheduleredfallocate.c, score/src/scheduleredfblock.c,
score/src/scheduleredfenqueue.c,
score/src/scheduleredfenqueuefirst.c,
score/src/scheduleredfextract.c, score/src/scheduleredffree.c,
score/src/scheduleredfprioritycompare.c,
score/src/scheduleredfreleasejob.c, score/src/scheduleredfschedule.c,
score/src/scheduleredfunblock.c, score/src/scheduleredfupdate.c,
score/src/scheduleredfyield.c: New files.
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