基于抢占阈值的嵌入式实时数据库事务调度

Scheduling of embedded real-time database transactions based on preemption thre shold

提出了一种嵌入式实时数据库事务处理模型 ,把抢占阈值应用到固定优先级可抢占的实时事务调度之中 ,并提出了一种冲突避免的实时事务并发控制协议 ,使实时事务调度和并发控制高度集成 ,降低了系统的事务管理开销 .通过事务的可调度性分析 。

Based on transaction′s prior knowledge a real-time tr ansaction processing model was proposed. It integrates transaction scheduling wi th offline concurrency control by preemption threshold, and has many advantages such as low er overhead, bounded priority inversion and improving schedulability. Through th e schedulability analysis the conditions of feasible transaction scheduling and an algorithm of priority and preemption threshold assignment were presented.