Jake Traynham wrote: > Wilfried, > >> >>> 3. Put a loop in my DataAvailable event that will do a Receive >>> until I get -1 back. This would probably be the easiest to >>> implement for me. >> >> No never do that. Don't set wsoReceiveLoop. If something is still (or >> again) in receiving winsock buffer when you leave OnDataAvailable >> then it will trigger again in a loop. >> > > If I don't set wsoNoReceiveLoop, then AsyncReceive loops > continually calling my OnDataAvailable event. This would be fine if > winsock did not put more FD_Read messages in the queue when I don't > receive all the data. The problem I'm facing is that on very large > transfers, winsock is flooding the queue with these FD_Read messages > which produce extra and pointless calls to OnDataAvailable. This is > what I'm trying to correct. > > So, the way I see it, I either have to set wsoNoReceiveLoop and let > each FD_Read message produce a single call to my OnDataAvailable > event, or I need to let AsyncRecieve loop and somehow tell winsock to > not produce the extra FD_Read messages. What produces the fastest > transfers and how would I set it up?
Maybe the following is a hint: "with either recv/WSARecv(..., MSG_PEEK) or ioctlsocket(FIONREAD, ...), to obtain the amount of data in the receive buffer is highly inefficient because the system must lock the data and count it." (http://support.microsoft.com/kb/192599/en) > >>> All in all, speed is my main interest here. I want to read in all >>> the data the server is sending me as fast as possible. >> >> - if possible move the data direcly where it belong, not copy it >> first in a buffer as you do now. If you have to buffer it in >> between for some reason make it as large as possible (make a >> little test case to see how large receiving packets will be in a >> real world test). - if you move direcly where it belong then you >> have to receive only what you need of course. but no worry >> OnDataAvailable will trigger again immediatly. > > I think you misunderstand me. My OnDataAvailable event is calling > Receive to read in the data and then that data is processed. The only > way I can process it is to read it in. I'm not saving this data to a > file on the hard drive or anything. So, I don't know what you mean by > "move the data directly where it belongs". I think Wilfried ment that frequent memory allocation/deallocation and moving data around in memory is slow. -- Arno Garrels > > > -- > Jake Traynham > Owner, CNS Plug-ins > http://www.cnsplug-ins.com/ -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
