High Performance(1)Events Threads Actors

High Performance(1)Events Threads Actors

Stream can be file, socket, pipe. I/O, read and write.
Blocking IO
        One thread can only handle one IO, ask A and B to read and write through a buffer.
        If we plan to deal with more IO in the same time, we need multiple threads or multiple processes.
             RPC Model
               Process per Connection, apache 
          
             TPC Model
               Thread per Connection 

NON-Blocking IO
        Put all the IO in the chain, ask them one by one.
        while true {
               for i in stream[];{
                    if i has data
                    read until unavailable
               }
        }

        select and poll (proxy)
        If there is no IO event, thread/process sleep, once event happen, wake up the all streams and ask them one by one.
          while true {
               select(streams[])
               for i in streams[]{
                    if i has data
                    read until unavailable
               }
          }

                    select Model


                    poll Model

          event poll (proxy)
                It will tell us which events are having IO, we only need to wake up the active streams and ask them one by one.
                while true{
                    active_stream[] = epoll_wait(epollfd)
                    for i in active_stream[]{
                         read or write till unavailable
                    }
               }
                    Epoll Model

Actor Model
               Data + Behavior + Message
               Thread can not call behavior in the Model, it will only send the message to the Model. (Disruptor, LMAX)
          

References:
http://www.zhihu.com/question/20122137

http://sillycat.iteye.com/blog/1767866
http://sillycat.iteye.com/blog/2099267

http://www.jdon.com/45728