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author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2014-07-04 14:34:23 +0200 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2014-07-09 10:05:17 +0200 |
commit | 5c3d2509593476869e791111cd3d93cc1e840b3a (patch) | |
tree | 2f642fcce66748460f0f823fbeb6f292267b8cd0 /cpukit/score/Makefile.am | |
parent | schedulerpriorityaffinitysmp.c: Add period at end of sentence (diff) | |
download | rtems-5c3d2509593476869e791111cd3d93cc1e840b3a.tar.bz2 |
score: Implement scheduler helping protocol
The following scheduler operations return a thread in need for help
- 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.
Add a new ask for help scheduler operation. This operation is used by
_Scheduler_Ask_for_help() to help threads in need for help returned by
the operations mentioned above. This operation is also used by
_Scheduler_Thread_change_resource_root() in case the root of a resource
sub-tree changes. A use case is the ownership change of a resource.
In case it is not possible to schedule a thread in need for help, then
the corresponding scheduler node will be placed into the set of ready
scheduler nodes of the scheduler instance. Once a state change from
ready to scheduled happens for this scheduler node it may be used to
schedule the thread in need for help.
Diffstat (limited to '')
-rw-r--r-- | cpukit/score/Makefile.am | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/cpukit/score/Makefile.am b/cpukit/score/Makefile.am index 6caefb5f10..e4c373c836 100644 --- a/cpukit/score/Makefile.am +++ b/cpukit/score/Makefile.am @@ -133,13 +133,15 @@ endif if HAS_SMP libscore_a_SOURCES += src/percpustatewait.c libscore_a_SOURCES += src/profilingsmplock.c -libscore_a_SOURCES += src/schedulersmpvalidstatechanges.c +libscore_a_SOURCES += src/schedulerchangeroot.c libscore_a_SOURCES += src/schedulerpriorityaffinitysmp.c libscore_a_SOURCES += src/schedulerprioritysmp.c libscore_a_SOURCES += src/schedulersimplesmp.c +libscore_a_SOURCES += src/schedulersmpdebug.c libscore_a_SOURCES += src/smp.c libscore_a_SOURCES += src/cpuset.c libscore_a_SOURCES += src/cpusetprintsupport.c +libscore_a_SOURCES += src/schedulerdefaultaskforhelp.c libscore_a_SOURCES += src/schedulerdefaultgetaffinity.c libscore_a_SOURCES += src/schedulerdefaultsetaffinity.c libscore_a_SOURCES += src/schedulersmpstartidle.c |