Advanced IO outline

Blocking ： Dead eye ,

Non blocking : Try to do ;        

Advantages and disadvantages ：

advantage :

Blocking is suspending a program , hand over cpu resources , therefore CPU The occupancy rate of is very low ;

shortcoming ：

Blocking IO Cannot realize single thread concurrent reading ,

 

1.   Non blocking is not dead waiting compared to blocking , Here we mainly supplement finite state machine programming , Suitable for complex processes , The advantage is not afraid of Party A's demand ;
2. IO Multiplex , Master at least two functions ;