[Konsole-devel] konsole kpart

Giacomo delleceste at gmail.com
Thu Oct 4 07:32:37 UTC 2007 

2007/10/3, Giacomo <delleceste at gmail.com>:
Hi, I mean Konsole KDE3.x.
Tomorrow i will try the same program inside the Konsole provided by KDE4
and will let you know.

Thank you and good night.

---> Here i am!

At a first glance, Konsole on KDE4 seems to consume more CPU than
Konsole-KDE3.
This is a first point, which probably main affects the performance also in my
Konsole KPart.

If you think it is useful, i can attach the output of `top' for
instance for some
time, to provide you an example of the two loads.

Thank you and have a good day
giacomo


>
> 2007/10/3, Robert Knight < robertknight at gmail.com>:
> > > inside a KApplication and a KonsolePart, it runs much slower.
> >
> > When you are running the application in a console, do you mean
> > Konsole/KDE 4? or a different terminal program?
> >
> > Regards,
> > Robert.
> >
> > On 03/10/2007, Giacomo <delleceste at gmail.com> wrote:
> > > Well, my application is named "ipfire".
> > >
> > > If i launch it as
> > >
> > > ./ipfire
> > >
> > > in a console, it goes fast (low CPU usage).
> > >
> > > if i do
> > >
> > > konsole_part->startProgram("./ipfire");
> > >
> > > inside a KApplication and a KonsolePart, it runs much slower.
> > >
> > > Thank you very much!
> > >
> > > Giacomo
> > >
> > >
> > > 2007/10/3, Robert Knight < robertknight at gmail.com>:
> > > > > This is the reason why i was wondering why such a greater usage of
> > > > > CPU when i switched to a KonsolePart.
> > > >
> > > > Let me clarify, are you saying that you have two separate applications
> > > > here (one the console application and one the GUI application with an
> > > > embedded Konsole part)?  If so, are you saying the console app is
> > > > running slower or the GUI app is running slower?
> > > >
> > > > Regards,
> > > > Robert.
> > > >
> > > > On 03/10/2007, Giacomo < delleceste at gmail.com> wrote:
> > > > > 2007/10/3, Robert Knight <robertknight at gmail.com>:
> > > > > > > which does the same amout of printf() calls and
> > > > > > > has the same logic, consumes much more CPU (3,4,5% ).
> > > > > >
> > > > > > If you are printing a lot of messages to the terminal then there
> will
> > > > > > be a certain overhead caused by the output processing and text
> > > > > > rendering.  I would expect the overhead to be very low unless you
> are
> > > > > > printing a very large number of messages.
> > > > >
> > > > > Yes there is a lot of messages to print out on the console, but this
> application
> > > > > has not been changed when embedded into a KonsolePart.
> > > > > This is the reason why i was wondering why such a greater usage of
> CPU when
> > > > > i switched to a KonsolePart.
> > > > > I mean, the application i monitor on the konsole KPart is the same i
> ran into
> > > > > a console Konsole alone, i.e. the same executable started with
> > > > >
> > > > > konsole_part->startProgram("program_name");
> > > > >
> > > > > Thank you anyway,
> > > > >
> > > > > Giacomo
> > > > >
> > > > >
> > > > > >
> > > > > > What exactly are these messages in any case?
> > > > > >
> > > > > > > Is this an issue related to overload caused by embedding Konsole
> in a KPart?
> > > > > > > Can i improve the performance of my Application?
>  > > > > >
> > > > > > Please don't try and guess where your application's performance
> > > > > > problems lie.  Use a profiling tool.  I recommend callgrind, which
> is
> > > > > > part of the valgrind suite.  kcachegrind can then be used to view
> and
> > > > > > analyse the results.  After installing valgrind, it can be used
> like
> > > > > > so:
> > > > > >
> > > > > > valgrind --tool=calllgrind yourapplication 2> logfile.out
> > > > > >
> > > > > > ... use your application as normal for a short while and then
> close it ...
> > > > > >
> > > > > > kcachegrind logfile.out
> > > > > >
> > > > > > This will give you a much more detailed analysis of where your
> > > > > > application is spending its CPU cycles.  If it turns out that a
> lot of
> > > > > > time is being spent in the Konsole part then please post the
> callgrind
> > > > > > log to this list.  It might be too large to post as an attachment
> > > > > > however.
> > > > > >
> > > > > > Regards,
> > > > > > Robert.
> > > > > >
> > > > > > On 03/10/2007, Giacomo < delleceste at gmail.com> wrote:
> > > > > > > Good morning to all.
> > > > > > >
> > > > > > > I used to have a program running on the console (konsole) and
> now i am
> > > > > > > porting it to a Qt4 (KDE4) application.
> > > > > > > The part of the program which used to print out messages on the
> console,
> > > > > > > has been embedded in a Konsole KPart.
> > > > > > >
> > > > > > > The issue is that, while when it was a console application it
> used to consume
> > > > > > > a little percentage of the CPU (< 1% on the peaks of the
> printf() calls ),
> > > > > > > now the _same_ application, which does the same amout of
> printf() calls and
> > > > > > > has the same logic, consumes much more CPU (3,4,5% ).
> > > > > > >
> > > > > > > Is this an issue related to overload caused by embedding Konsole
> in a KPart?
> > > > > > > Can i improve the performance of my Application?
> > > > > > > Or is it a price to pay to embed a console application into a
> Konsole KPart?
> > > > > > > Or is it because i have a alpha version of KDE4?
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > Thank you for any advice.
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --
> > > > > > > Giacomo S.
> > > > > > > http://www.giacomos.it
> > > > > > >
> > > > > > > - - - - - - - - - - - - - - - - - - - - - -
> > > > > > >
> > > > > > > IPFIREwall ( http://www.giacomos.it/ipfire) viene presentato
> > > > > > > all'Universita` degli Studi di Udine, il 28 ottobre, in
> occasione del
> > > > > > > Linux Day 2006:
> > > > > > > http://iglu.cc.uniud.it/linuxday
> > > > > > >
> > > > > > > - - - - - - - - - - - - - - - - - - - - - -
> > > > > > >
> > > > > > >  . ''  `.
> > > > > > > :   :'    :
> > > > > > >  `.  ` '
> > > > > > >     `- Debian GNU/Linux -- The power of freedom
> > > > > > >         http://www.debian.org
> > > > > > > _______________________________________________
> > > > > > > konsole-devel mailing list
> > > > > > > konsole-devel at kde.org
> > > > > > >
> https://mail.kde.org/mailman/listinfo/konsole-devel
> > > > > > >
> > > > > > _______________________________________________
> > > > > > konsole-devel mailing list
> > > > > > konsole-devel at kde.org
> > > > > >
> https://mail.kde.org/mailman/listinfo/konsole-devel
> > > > > >
> > > > >
> > > > >
> > > > > --
> > > > > Giacomo S.
> > > > > http://www.giacomos.it
> > > > >
> > > > > - - - - - - - - - - - - - - - - - - - - - -
> > > > >
> > > > > IPFIREwall (http://www.giacomos.it/ipfire) viene presentato
> > > > > all'Universita` degli Studi di Udine, il 28 ottobre, in occasione
> del
> > > > > Linux Day 2006:
> > > > > http://iglu.cc.uniud.it/linuxday
> > > > >
> > > > > - - - - - - - - - - - - - - - - - - - - - -
> > > > >
> > > > >  . ''  `.
> > > > > :   :'    :
> > > > >  `.  ` '
> > > > >     `- Debian GNU/Linux -- The power of freedom
> > > > >         http://www.debian.org
> > > > > _______________________________________________
> > > > > konsole-devel mailing list
> > > > > konsole-devel at kde.org
> > > > > https://mail.kde.org/mailman/listinfo/konsole-devel
> > > > >
> > > > _______________________________________________
> > > > konsole-devel mailing list
> > > > konsole-devel at kde.org
> > > > https://mail.kde.org/mailman/listinfo/konsole-devel
> > > >
> > >
> > >
> > > --
> > > Giacomo S.
> > > http://www.giacomos.it
> > >
> > > - - - - - - - - - - - - - - - - - - - - - -
> > >
> > > IPFIREwall (http://www.giacomos.it/ipfire) viene presentato
> > > all'Universita` degli Studi di Udine, il 28 ottobre, in occasione del
>  > > Linux Day 2006:
> > > http://iglu.cc.uniud.it/linuxday
> > >
> > > - - - - - - - - - - - - - - - - - - - - - -
> > >
> > >  . ''  `.
> > > :   :'    :
> > >  `.  ` '
> > >     `- Debian GNU/Linux -- The power of freedom
> > >         http://www.debian.org
> > > _______________________________________________
> > > konsole-devel mailing list
> > > konsole-devel at kde.org
> > > https://mail.kde.org/mailman/listinfo/konsole-devel
> > >
> > _______________________________________________
> > konsole-devel mailing list
> > konsole-devel at kde.org
> > https://mail.kde.org/mailman/listinfo/konsole-devel
> >
>
>
> --
>
> Giacomo S.
> http://www.giacomos.it
>
> - - - - - - - - - - - - - - - - - - - - - -
>
> IPFIREwall ( http://www.giacomos.it/ipfire) viene presentato
> all'Universita` degli Studi di Udine, il 28 ottobre, in occasione del
> Linux Day 2006:
>  http://iglu.cc.uniud.it/linuxday
>
> - - - - - - - - - - - - - - - - - - - - - -
>
> . ''  `.
> :   :'    :
> `.  ` '
>     `- Debian GNU/Linux -- The power of freedom
>          http://www.debian.org
>


-- 
Giacomo S.
http://www.giacomos.it

- - - - - - - - - - - - - - - - - - - - - -

IPFIREwall (http://www.giacomos.it/ipfire) viene presentato
all'Universita` degli Studi di Udine, il 28 ottobre, in occasione del
Linux Day 2006:
http://iglu.cc.uniud.it/linuxday

- - - - - - - - - - - - - - - - - - - - - -

 . ''  `.
:   :'    :
 `.  ` '
    `- Debian GNU/Linux -- The power of freedom
        http://www.debian.org

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