有高手知道sched_yield是什么意思吗？

[springstart]

有高手知道sched_yield是什么意思吗？

送分100：）

[slone]

http://www-128.ibm.com/developerworks/cn/linux/sdk/rt/part8/index.html

[gaoxianfeng]

A process can relinquish the processor voluntarily without blocking by
calling sched_yield. The process will then be moved to the end of the
queue for its static priority and a new process gets to run.

Note: If the current process is the only process in the highest prior-
ity list at that time, this process will continue to run after a call
to sched_yield.

说的很清楚
就是主动放弃cpu 并排到调度队尾
如果在最高运行优先级队列里只有他一个 就继续运行