Re: my notes from the tracing workshop

[Andrew Cagney <cagney@redhat.com>]

[sorry missed this e-mail]

William Cohen wrote:
> Andrew Cagney wrote:
>
>> Visualization.
>>
>> Many visualization tools were presented (if I see another useless 
>> full-screen snap-shot in a slide I'll scream), most built on eclipse, 
>> but a few were not.  While this is a very crowded market, there 
>> seems, in mnsho, to still be a need for clear simple visualization 
>> tools backed by a databse.
>>
>> The quote of the day, in describing eclipse, has to be "icon diarrhea".
>
> Were the tools showing more than just a simple time line of logs? 
> Having just a time-line plot of when things happen is not that useful. 
> For example, LTT had some time-line graphing of events. There is 
> either too much data or too little data on the screen . When showing a 
> signficant portion the time line there is a massive clutter of items 
> in the time line in addition to the few events you are interested in. 
> When zooming in one only sees the single event, not the other 
> interesting event(s). Really want visualization tools declutter and 
> filter out as much as possible from the graphics.
>

Yes,

- two tools demonstrated some form of 3d visualization (I know there 
were at least two as that each project was doing their own SWT bindings 
to OpenGL came up as a topic :-) taking a high level view.  For instance 
a 3d graph of events vs process over time.

- tptp demonstrated (the 10 minute unintended demo was far more useful 
than the slides) zomming in/out using drag select to give that 
high-level view and then zoom in

Typically the UI was using SQL queries to extract/filter the data before 
visualizing it.

Andrew