Le jeudi 01 mars 2012 à 13:50 +0100, Rodrigo Moya a écrit :

the main problem in D-Bus we are trying to solve is the context
switches, since right now, there is a daemon, which listens on a UNIX
socket, and all traffic in the bus goes through it, and then the daemon
has to route the messages it gets on that socket to the corresponding
place(s). So, every time someone sends a message to D-Bus, since all
traffic goes through the daemon, dbus-daemon gets waked-up, which is one
of the biggest bottlenecks we are trying to fix.

That's why we are thinking about using multicast with socket filters, so
that the daemon only gets traffic it cares about and thus is not waked
up and context switches don't happen when not needed.

Using message queues, AFAICS, we would have the same problem, as the
daemon would create the message queue and would get all traffic, right?

This is why I mentioned extensions.

Anyway, if you think multicast sockets is the way to go, then you could
setup a virtual network just to be able to use AF_INET multicast.

Thats probably doable without kernel patching.