RE: [PATCH 0/10] af_unix: add multicast and filtering features toAF_UNIX

[Eric Dumazet]

Le jeudi 01 mars 2012 Ã 13:50 +0100, Rodrigo Moya a Ãcrit :
> 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.



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