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* score: Improve scheduler helping protocolSebastian Huber2017-02-031-3/+1
| | | | | | | | | | | 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.
* score: Simplify yield and unblock scheduler opsSebastian Huber2016-11-021-2/+2
| | | | Update #2556.
* score: Pass scheduler node to yield operationSebastian Huber2016-11-021-3/+7
| | | | | | Changed for consistency with other scheduler operations. Update #2556.
* score: Update _Thread_Heir only if necessarySebastian Huber2015-03-051-10/+2
| | | | | | | | | | | | | | | | | | | | 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.
* score: Need for help indicator for scheduler opsSebastian Huber2014-07-081-1/+3
| | | | | | | | | | | | | 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.
* score: Rename *_Node_get() to *_Thread_get_node()Sebastian Huber2014-07-081-1/+1
| | | | | | 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.
* score: PR2181: Add _Thread_Yield()Sebastian Huber2014-06-121-14/+9
| | | | | | | | | | | | | | | | | | | The _Scheduler_Yield() was called by the executing thread with thread dispatching disabled and interrupts enabled. The rtems_task_suspend() is explicitly allowed in ISRs: http://rtems.org/onlinedocs/doc-current/share/rtems/html/c_user/Interrupt-Manager-Directives-Allowed-from-an-ISR.html#Interrupt-Manager-Directives-Allowed-from-an-ISR Unlike the other scheduler operations the locking was performed inside the operation. This lead to the following race condition. Suppose a ISR suspends the executing thread right before the yield scheduler operation. Now the executing thread is not longer in the set of ready threads. The typical scheduler operations did not check the thread state and will now extract the thread again and enqueue it. This corrupted data structures. Add _Thread_Yield() and do the scheduler yield operation with interrupts disabled. This has a negligible effect on the interrupt latency.
* score: Introduce scheduler nodesSebastian Huber2014-05-141-3/+2
| | | | | | | | | | | | 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.
* score: Static scheduler configurationSebastian Huber2014-04-151-3/+3
| | | | | | Do not allocate the scheduler control structures from the workspace. This is a preparation step for configuration of clustered/partitioned schedulers on SMP.
* score: Add scheduler control to scheduler opsSebastian Huber2014-04-041-6/+11
| | | | | Scheduler operations must be free of a global scheduler context to enable partitioned/clustered scheduling.
* Change all references of rtems.com to rtems.org.Chris Johns2014-03-211-1/+1
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* score: Add _Scheduler_priority_Get_scheduler_infoSebastian Huber2013-08-201-8/+7
| | | | Add and use _Scheduler_priority_Get_scheduler_info().
* score: Create thread implementation headerSebastian Huber2013-07-261-0/+1
| | | | | | | | 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.
* score: Create schedulerpriority impl headerSebastian Huber2013-07-261-4/+1
| | | | | | | | | | | | | 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.
* scheduler: Specify thread of yield operationSebastian Huber2013-06-141-8/+6
| | | | | | The yielding thread of the yield operation is now specified by a parameter. The tick operation may be performed for each executing thread in a SMP configuration.
* score misc: Score misc: Clean up Doxygen #5Alex Ivanov2012-11-291-8/+7
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* Remove All CVS Id Strings Possible Using a ScriptJoel Sherrill2012-05-111-2/+0
| | | | | | | | | | | | 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.
* 2011-02-18 Joel Sherrill <joel.sherrill@oarcorp.com>Joel Sherrill2011-02-181-17/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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.
* 2011-02-17 Joel Sherrill <joel.sherrill@oarcorp.com>Joel Sherrill2011-02-171-17/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | * 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.
* 2011-01-28 Joel Sherrill <joel.sherrilL@OARcorp.com>Joel Sherrill2011-01-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | * 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.
* 2010-11-25 Sebastian Huber <sebastian.huber@embedded-brains.de>Sebastian Huber2010-11-251-1/+1
| | | | | | | | | | | | * sapi/include/confdefs.h, score/include/rtems/score/scheduler.h, score/inline/rtems/score/scheduler.inl, score/inline/rtems/score/schedulerpriority.inl, score/src/schedulerpriority.c, score/src/schedulerprioritythreadschedulerallocate.c, score/src/schedulerprioritythreadschedulerfree.c, score/src/schedulerprioritythreadschedulerupdate.c, score/src/schedulerpriorityyield.c: Added attribute unused. Renamed types and fields to follow the Score naming conventions.
* 2010-11-25 Sebastian Huber <sebastian.huber@embedded-brains.de>Sebastian Huber2010-11-251-1/+1
| | | | | | | | | | | | | | | | | | * libfs/src/dosfs/fat_file.c, libfs/src/imfs/imfs_debug.c, libfs/src/imfs/imfs_directory.c, libfs/src/imfs/imfs_getchild.c, posix/src/killinfo.c, score/inline/rtems/score/schedulerpriority.inl, score/inline/rtems/score/watchdog.inl, score/src/apiext.c, score/src/chain.c, score/src/coremsgflushsupp.c, score/src/coremsginsert.c, score/src/objectshrinkinformation.c, score/src/schedulerpriorityyield.c, score/src/threadqdequeuepriority.c, score/src/threadqenqueuepriority.c, score/src/threadqextractpriority.c, score/src/threadqfirstfifo.c, score/src/threadqfirstpriority.c, score/src/threadyieldprocessor.c, score/src/userextthreadbegin.c, score/src/userextthreadcreate.c, score/src/userextthreaddelete.c, score/src/userextthreadrestart.c, score/src/userextthreadstart.c, score/src/userextthreadswitch.c, score/src/watchdogreportchain.c: Avoid chain API violations.
* 2010-11-24 Gedare Bloom <giddyup44@yahoo.com>Joel Sherrill2010-11-241-0/+77
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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