Re: [GIT PULL] kdbus for 4.1-rc1

From: David Lang
Date: Tue Apr 28 2015 - 13:20:03 EST

On Tue, 28 Apr 2015, Havoc Pennington wrote:

btw if I can make a suggestion, it's quite confusing to talk about
"dbus" unqualified when we are talking about implementation issues,
since it muddles bus daemon vs. clients, and also since there are lots
of implementations of the client bindings:

For the bus daemon, the only two implementations I know of are the
original one (which uses libdbus as its binding) and kdbus, though.

I would expect there's no question the bus daemon can be faster, maybe
say 1.5x raw sockets instead of 2.5x, or whatever - something on that
order. Should probably simply stipulate this for discussion purposes:
"someone could optimize the crap out of the bus daemon". The kdbus
question is about whether to eliminate this daemon entirely.

As I'm seeing things, we aren't talking about 1.5x vs 2.5x, we're talking about 1000x

If the examples that are being used to show the performance advantage of kdbus vs normal dbus are doing the wrong thing, then we need to get some other examples available to people who don't live and breath dbus that 'so things right' so that the kernel developers can see what you think is the real problem and how kdbus addresses it.

So far, this 'wrong' example is the only thing that's been posted to show the performance advantage of kdbus.

David Lang
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