busy waiting vs sleep
这样做的好处是,它的实现较简单,并且如果不等太久它在性能上会表现很好,因为避免了切换到其他线程的开销。坏处也很明显:把CPUcycle浪费在执行无任何价值的东西上。,Busy-waitingitselfcanbemademuchlesswastefulbyusingadelayfunction(e.g.,sleep())foundinmost...
What are trade offs for "busy wait" vs "sleep"?
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2009年7月10日—Blockingcallsarenotbusywaitingorspinlocks.Blockingcallsaresleepable--thatmeanstheCPUwouldworkonothertask,nocpuare ...
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