From 8fcafdd553f3a564ecb5ab5093d01b29971418da Mon Sep 17 00:00:00 2001 From: Sebastian Huber Date: Wed, 21 May 2014 10:33:43 +0200 Subject: score: Multiprocessor Resource Sharing Protocol 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. --- cpukit/rtems/Makefile.am | 1 + 1 file changed, 1 insertion(+) (limited to 'cpukit/rtems/Makefile.am') diff --git a/cpukit/rtems/Makefile.am b/cpukit/rtems/Makefile.am index 4b84fa1343..eb9b16ee04 100644 --- a/cpukit/rtems/Makefile.am +++ b/cpukit/rtems/Makefile.am @@ -206,6 +206,7 @@ librtems_a_SOURCES += src/semrelease.c librtems_a_SOURCES += src/semflush.c librtems_a_SOURCES += src/semtranslatereturncode.c librtems_a_SOURCES += src/semdata.c +librtems_a_SOURCES += src/semsetpriority.c ## EVENT_C_FILES librtems_a_SOURCES += src/event.c -- cgit v1.2.3