linux-kernel - Re: [GIT PULL] kdbus for 4.1-rc1

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Message-ID: <CALCETrW+erTbMBHnN5zv_noP38Gznm4E0U7qk+uxOvM+a=NvCg@mail.gmail.com>
Date:	Mon, 27 Apr 2015 14:40:02 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Lukasz Skalski <l.skalski@...sung.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Tom Gundersen <teg@...m.no>, Jiri Kosina <jkosina@...e.cz>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Daniel Mack <daniel@...que.org>,
	David Herrmann <dh.herrmann@...il.com>,
	Djalal Harouni <tixxdz@...ndz.org>
Subject: Re: [GIT PULL] kdbus for 4.1-rc1

On Mon, Apr 27, 2015 at 2:32 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
> On Fri, Apr 24, 2015 at 6:50 AM, Lukasz Skalski <l.skalski@...sung.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*.

Change "USER" to "SESSION".  Build with:

gcc -Wall -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -o
client client.c -lglib-2.0 -ldbus-glib-1 -ldbus-1 -lgobject-2.0
-lglib-2.0 -ldbus-1 -lgio-2.0

The again with s/client/server/

For all I know, the USER vs SESSION distinction matters, but I can't
imagine why.

>
> 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.

Whee!  I'm typing this email on a potato!

--Andy
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