基于优先级的节拍轮转调度系统设计  

Design of RTOS Base Priority With Tick RR-scheduler

作　　者：庞吉耀 

机构地区：[1]南京磐能电力科技股份有限公司,江苏南京210032

出　　处：《工业控制计算机》2016年第2期17-19,共3页Industrial Control Computer

摘　　要：提出了一种新型基于节拍的多任务轮转调度策略,通过把任务分成32个优先级组,每个优先级组32个任务,在系统节拍的驱动下从高优先级组到低优先级组轮转调度各组中就绪任务,配合抢占式调度和紧凑的中断回调服务,使系统具有良好实时性和平衡性。同时介绍了系统内存管理、栈帧结构和API接口等技术,任务时序测试表明调度稳定可预测,现场批量使用也表明系统稳定可靠,完全达到设计目标。This paper presents a new RR-scheduler scheme based on system tick,tasks in this system are divided into32 priority groups,each priority group can contain 32 tasks,OS schedule each ready task from the highest level to the lowest level driven by system tick,cooperate with preemptive policy and compact interrupt callback service,make this OS achieve well real-time performance and well balance between task groups.At the same time introduces the structure of the system memory management, stack frame and API interface technology.

关 键 词：轮转调度 节拍 抢占 实时系统 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]