You know the inet sockets in qemu: ... -net socket,vlan=1,connect=127.0.0.1:47654 ... Well, a bug I looked into lead me to code a very simple process doing a "cable" between two machines connected with this config. This setup gave surprising results and lead me to compare ping timings between this new inet sockets I made to reproduce the bug for Stefan Hajnoczi and my usual unix sockets I use in cloonix. My reason to use unix sockets is only not to use global machine resources such as tcp ports, it was not for performance at the time...
I noticed the very surprisingly long ping time (40ms!!!!) I looked for a bug in my "cable" for hours to see where time was spent, then I built the unix socket inside the same "cable" code. I now have to share the experiment with you. The associated file contains a README that will guide you through the experiment that shows the difference between unix socket carried pings: 0.7ms and inet carried pings: 40ms!!! Untar compile and test:) ... -net socket,vlan=1,connect=unix:/tmp/guest1.sock ... Regards Vincent Perrier
proof_of_unix_socket_superiority.tar.gz
Description: GNU Zip compressed data
