though hdfs is stilled used in e, it can automatic stop when there are no more controls in activated state . 3 . fifo edges 通過純數(shù)據(jù)流調(diào)度器的自動關(guān)閉與事件激活機制,使得e語言可以在沒有數(shù)據(jù)可以處理的時候讓出cpu。
the " event triggered " has two meanings in e : one is the execution of thread control can be triggered by external event; the other is the hdfs ( homogeneous dataflow scheduler ) can be activated by other controls 這里的事件觸發(fā)有兩層含義:一是內(nèi)含線程的控件,其操作運行可以由外部事件觸發(fā);二是純數(shù)據(jù)流調(diào)度器可以由線程控件發(fā)出的事件激活。