Taking advantage of TCP Loopback fast path in Windows

[Alan Bateman]

On 02/10/2014 11:17, Kirk Shoop (MS OPEN TECH) wrote:
> :
> 	
> We tried the suggestions in this thread and the result is a much smaller patch that works as well as the previous patch.
>
> https://openjdkcontrib.blob.core.windows.net/tcploopback/webrev-20141002.zip
>
> GetVersionEx is not used and the IOCTL is applied when the socket is constructed.
> 	
> Thanks for sending us back for another look,
>
This looks much better and I can sponsor this.

One that we need to decide on is the system property to enable this. You 
are currently using "windows.enableFastLocalTcpLoopback". In recent time 
we have been using "jdk.*" for JDK-specific properties. What would you 
think about renaming it to jdk.net.useFastLocalTcpLookack"?

Another thing that I meant to ask is whether we can skip this for UDP 
sockets. In Net.socket0 for example then I assume it should be "if 
(stream && fastLookback)".

-Alan
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