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List: kde-core-devel
Subject: Re: D-BUS required changes in KDE 4
From: Ralf Habacker <ralf.habacker () freenet ! de>
Date: 2006-05-29 15:58:29
Message-ID: 447B1A25.1050306 () freenet ! de
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Thiago Macieira schrieb:
> Olivier Goffart wrote:
>> But I think (I'm absolutely not sure) that D-Bus can automatically start
>> service when they are required. Maybe we can play with that.
>
> Right now, it can't.
>
> The proposed solution would work on Unix/X11 only and would be dependent
> on the X server being active.
>
> I have no idea how a similar solution would be on Windows. If it has
> auto-startable services, it's a possibility. The great problem is finding
> out the address of the bus server: if it isn't well-known (as is the case
> of the Unix session daemon), it would be a problem.
The unix dbus daemon has build in default settings for the system and
session bus. This could be done similar under windows. Tor Lillquist's
dbus patches for windows uses tcp for the transport. It uses a random
tcp port, but save it into into a file, which could have a well known
path similar to the unix domain socket protocol.
Ralf
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To: cygwin@cygwin.com
From: Torfinn Ottesen <Torfinn.Ottesen@gmail.com>
Subject: Re: "fork problem" debugging
Date: Mon, 29 May 2006 15:40:54 +0000 (UTC)
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Peter Ekberg <peda <at> lysator.liu.se> writes:
>
> On Sun, May 28, 2006 at 10:40:34PM +0000, Torfinn Ottesen wrote:
> > <heavily snipped content>
> <snipping some more>
>
> > I did this for three programs, prog1 (commercial, external),
> > prog2 (inhouse, compiled on Cygwin) and native cygwin prog3:
> > "echo". I claim that I saw increased increase memory usage
> > for prog1 and prog2 - but not for the "echo" program.
>
> Did you really fork for echo, or did you use a shell builtin by mistake?
>
> /bin/echo is your friend...
>
> Cheers,
> Peter
>
>
Hm -
$ which echo # give me: /usr/bin/echo whereas
$ type echo # tells that it is a builtin
... thanks for the question, I am now sure that that it was
the builtin by mistake. I repeated this right now with an
interesting result:
-------
for i in $(seq 1000)
do
/usr/bin/echo $i
done
Finding, reading off total commit charge in "Task Manager"
- prior to execting loop three times: 357 400 kb
- after 3 loops (3000 forks) : 370 550 kb
After 3000 forks of /usr/bin/echo - about 13.2 MB memory increase.
The value appears to be reasonable constant while writing this.
-------------------
Exiting from my xterm, result : down to about 360 800 kb
Exiting from Cygwin/X wmanager: down to about 342 600 kb
---------------
Starting Cygwin/X with one xterm similar to situation prior to loop:
up to 367 400 kb. About 10 MB more than before looping it three times,
have lost about 10 MB somewhere.
-----
Shutting down Cygwin/X, down to 343 100 kb, starting again,
up to: 367 900 kb. (about the same as above)
------
Does 3000 forks, up to : 380 400 kb
Shutting down Cygwin/X and up again, up to: 380 800 kb.
----
Well, it is repeatable here - memory is lost for each fork. The situation
(lost memory) appears to be unaffected by shutting down and restarting
Cygwin/X (doing this by X-ing).
--------
Because of similarity with previous incidences I believe now that
even this little "/usr/bin/echo" loop can bring down my PC if
running long enough.
----
It would be interesting to see if someone else can reproduce
this - I'll ask my collegue to try this one tomorrow.
Regards
Torfinn Ottesen
(Cygwin on MS Win XP Pro Service Pack 1)
PS:
For what it is worth, I have a slightly modified Cygwin/X:
C:\cygwin\usr\X11R6\bin\startxwin.bat
%RUN% XWin -clipboard -silent-dup-error
%RUN% xterm -bg FloralWhite -sb -rightbar -e /usr/bin/bash -l
%RUN% wmaker
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