[Konsole-devel] konsole kpart

[Robert Knight]

> 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
>