rtems - RTEMS Kernel, file-systems, drivers, BSPs, samples, and testsuite.

	Commit message (Collapse)	Author	Age	Files	Lines
*	score: Fix scheduler helping protocol	Sebastian Huber	2015-05-11	1	-248/+256
\| \| \| \| \| \|	Account for priority changes of threads executing in a foreign partition. Exchange idle threads in case a victim node uses an idle thread and the new scheduled node needs an idle thread.
*	smp: Fix timeout for MrsP semaphores	Sebastian Huber	2014-12-18	1	-0/+5
\| \| \| \| \| \| \| \|	The previous timeout handling was flawed. In case a waiting thread helped out the owner could use the scheduler node indefinitely long. Update the resource tree in _MRSP_Timeout() to avoid this issue. Bug reported by Luca Bonato.
*	smp: Fix scheduler helping protocol	Sebastian Huber	2014-11-27	1	-1/+21
\| \| \| \| \| \| \|	Ensure that scheduler nodes in the SCHEDULER_HELP_ACTIVE_OWNER or SCHEDULER_HELP_ACTIVE_RIVAL helping state are always SCHEDULER_SMP_NODE_READY or SCHEDULER_SMP_NODE_SCHEDULED to ensure the MrsP protocol properties.
*	smp: Fix scheduler helping protocol	Luca Bonato	2014-11-24	1	-0/+1
\| \| \| \| \| \| \| \| \| \| \| \|	New test case for smptests/smpmrsp01. Fix _Scheduler_Block_node() in case the node is in the SCHEDULER_HELP_ACTIVE_RIVAL helping state. For example a rtems_task_suspend() on a task waiting for a MrsP semaphore. Fix _Scheduler_Unblock_node() in case the node is in the SCHEDULER_SMP_NODE_READY state. For example a rtems_task_resume() on a task owning or waiting for a MrsP semaphore.
*	score: Fix scheduler helping implementation	Sebastian Huber	2014-07-10	1	-241/+241
\| \| \| \| \|	Do not extract the idle threads from the ready set so that there is always a thread available for comparison.
*	smptests/smpmrsp01: Add and update test cases	Sebastian Huber	2014-07-09	1	-140/+337
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*	score: Multiprocessor Resource Sharing Protocol	Sebastian Huber	2014-05-28	1	-0/+147
	Add basic support for the Multiprocessor Resource Sharing Protocol (MrsP). The Multiprocessor Resource Sharing Protocol (MrsP) is defined in A. Burns and A.J. Wellings, A Schedulability Compatible Multiprocessor Resource Sharing Protocol - MrsP, Proceedings of the 25th Euromicro Conference on Real-Time Systems (ECRTS 2013), July 2013. It is a generalization of the Priority Ceiling Protocol to SMP systems. Each MrsP semaphore uses a ceiling priority per scheduler instance. These ceiling priorities can be specified with rtems_semaphore_set_priority(). A task obtaining or owning a MrsP semaphore will execute with the ceiling priority for its scheduler instance as specified by the MrsP semaphore object. Tasks waiting to get ownership of a MrsP semaphore will not relinquish the processor voluntarily. In case the owner of a MrsP semaphore gets preempted it can ask all tasks waiting for this semaphore to help out and temporarily borrow the right to execute on one of their assigned processors. The help out feature is not implemented with this patch.