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Re: my notes from the tracing workshop
- From: Andrew Cagney <cagney at redhat dot com>
- To: William Cohen <wcohen at redhat dot com>
- Cc: systemtap at sourceware dot org, frysk <frysk at sourceware dot org>
- Date: Mon, 03 Mar 2008 11:56:58 -0500
- Subject: Re: my notes from the tracing workshop
- References: <47A34AA2.5070404@redhat.com> <47A8C8F4.4060704@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