优先级继承

优先级继承是实时计算中去除优先级翻转的一种方法。进程调度算法对获取到临界资源的进程(A)增加其优先级为所有等待该资源的进程中的最高优先级。 一旦进程(A)释放了该资源，就恢复到原来的优先级。

例子
考虑下例:

假定L获取到共享资源后，H申请该资源不得而被阻塞。优先级继承协议把L的优先级升级到H的级别。M将不能抢先L因而M被阻塞。当L释放资源后，恢复到低优先级并唤醒H。H有高优先级因而抢先了L的执行权。随后M、L依次恢复执行。

参考文献

• "[https://web.archive.org/web/20070706071045/http://www.linuxdevices.com/articles/AT5698775833.html Priority Inheritance: The Real Story]" by
• "[https://web.archive.org/web/20070706071207/http://www.linuxdevices.com/articles/AT7168794919.html Against Priority Inheritance]" by
• "[http://rtdoc.cs.uri.edu/downloads/wohlever_thesis.pdf Implementing Concurrency Control With Priority Inheritance in Real-Time CORBA] " by , and Russell Johnston
• "[http://citeseer.ist.psu.edu/108383.html Priority Inheritance Spin Locks for Multiprocessor Real-Time Systems]" by , and
• "[http://doi.ieeecomputersociety.org/10.1109/REAL.2003.1253271 Hardware Support for Priority Inheritance]" by , , and