Re: [GIT PULL] kdbus for 4.1-rc1

Lukasz Skalski
2015-04-28T10:39:13Z

On 04/27/2015 11:32 PM, Linus Torvalds wrote:
> On Fri, Apr 24, 2015 at 6:50 AM, Lukasz Skalski <l.skalski@samsung.com> wrote:
>>
>> To perform tests I've created two simple apps:
>>
>> - server: http://fpaste.org/215157/
>> - client: http://fpaste.org/215156/
>
> So since Andy reported that dbus seems to be a few orders of magnitude
> too slow, I tried to build these apps to see what it even does.
>
> They don't buidl on F21. You seem to be using features that are too
> new to exist even in fairly modern distros:
>
> server.c:47:24: error: ‘G_BUS_TYPE_USER’ undeclared
>
> so I can't even see what dbus does *now*.
>

I've just explained it in my mail to Andy. As it was discussed some
time ago with GLib developers, we introduced two new bus
types called "user" (G_BUS_TYPE_USER) and "machine"
(G_BUS_TYPE_MACHINE). At this moment, these are only available on GLib
devel branch, so I should replace G_BUS_TYPE_USER with
G_BUS_TYPE_SESSION before I posted my benchmark apps - sorry for that.

> That said, either you're running your test on a potato, or dbus is
> seriously screwed up. No way should it take 4+ seconds to send a 1000b
> message to back and forth 20k times. But as mentioned, I can't even
> see what it's doing right now.
>
> Linus
>

--
Lukasz Skalski
Samsung R&D Institute Poland
Samsung Electronics
l.skalski@samsung.com