摘要
在一般的嵌入式实时操作系统中,时钟中断服务程序在每个时钟节拍工作。在实际应用中,并不是每个时钟节拍都有任务调度,所以有很多时钟中断服务程序的工作是多余的,浪费了CPU资源。为了提高性能,文章提出了一种方法来改变这种情况。
In most RTOS, the timer interrupt service routine(ISR) executes at every time tick. In most practical application, context switch doesn't happen at some time tick , so sometime the execution of timer ISR is useless and wastes CPU time. In this paper, a new method is proposed to prevent useless execution of the timer ISR.
出处
《计算机工程》
CAS
CSCD
北大核心
2003年第6期79-81,共3页
Computer Engineering