Treemap Visualization for profiling output

[Alexander Rawass]

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Hi,

I got your email adress by 'gprof --help', and I'd like to talk to you about 
using my Treemap-Widget to display output from programs like gprof in a 'new 
way'.

I am the author of QTreeMap, a general Qt/KDE-Widget to display general 
hierarchies (that can be associated with a size) in from of a Treemap.

Treemaps are a 'new' way of displaying a hierarchical tree in a graphics area.
Each node in the tree is drawn as a rectangle, with its subnodes draws inside 
it, all drawn proportional to their size - so, large nodes get large areas on 
the screen and small ones small areas.
You can see the _whole_ hierarchy of the tree at _one_ glance as a 800x600 
painting.

Screenshots of my /usr/X11R6 filetree seen as a treemap:
http://kdirstat.sourceforge.net/kdirstat/treemaps/screenshots/sqr_bump_usr_x11r6.png
http://kdirstat.sourceforge.net/kdirstat/treemaps/screenshots/flat_usr_x11r6.png
http://kdirstat.sourceforge.net/kdirstat/treemaps/screenshots/dist_cushion_mono_usr_x11r6.png

The output of gprof can be seen as hierarchical data, where each element is a 
block of the program that has been accessed n times or for t seconds.
If profiling output would be displayed as a treemap, you could see at one 
glance which code-blocks use the most time - they are the rectangles with the 
largest size/area.

QTreeMap is currently part of KDirStat, a disk-usage utility.
QTreeMap is used to display the size of a directory and all its subdirs and 
their files at one glance - you can easliy pick out which are the largest 
files or dirs on your harddisk.

I am not familiar with gprof or profiling or the format of the profiling 
data, but I really think that a Treemap could display this profing data 
better than the normal ascii output.

So, I'm searching for people to help me, to write a new subclass of QTreeMap 
that can work on a tree with profiling data.

If've already tried to contact the author of KProf 
(address@hidden), a profiling data viewer with a traditional 
treeview, but he hasn't asnwered yet.

Do you know of other profile viewers for X,Gtk/Gnome or Qt that I could try 
to modify?
Or could I even use gprof itself as the basics for this viewer application?
In any way, I need help from those who are familiar with prof. output.


Links:

KDirStat         http://kdirstat.sourceforge.net/kdirstat/
QTreeMap         http://kdirstat.sourceforge.net/kdirstat/treemaps/index.html
KDirStat CVS:   http://sourceforge.net/cvs/?group_id=30290
SequoiaView, Treemap Viewer for Win32           
http://www.win.tue.nl/sequoiaview/
Home of the inventor of Treemaps:       http://www.cs.umd.edu/hcil/treemaps/


I hope to hear from you



Alex


- -- 
                   Alexander Rawass
          Email: address@hidden
     Project Homepage: http://tuxfleet.sourceforge.net
...but some day you'll be a STAR in somebody else's SKY...
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