[Konsole-devel] konsole kpart

Robert Knight robertknight at gmail.com
Thu Oct 4 08:54:12 UTC 2007 

> At a first glance, Konsole on KDE4 seems to consume more CPU than
> Konsole-KDE3.

That is unexpected behaviour.  There is a buggy patch to Qt which does
cause a performance problem though which might be related.  If you are
compiling KDE 4 from SVN then try removing qt-copy patch #0182 (in
trunk/qt-copy/patches).  Otherwise you will have to ask the person who
packaged KDE 4 for you to do likewise.

Regards,
Robert.


On 04/10/2007, Giacomo <delleceste at gmail.com> wrote:
> 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
> _______________________________________________
> konsole-devel mailing list
> konsole-devel at kde.org
> https://mail.kde.org/mailman/listinfo/konsole-devel
>

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