Re: [tracecompass-dev] TimeGraphView Visualization Bug

[Aleix Roca Nonell <aleix.rocanonell@xxxxxx>]

Hello Patrick,

Ok, I see. If this is an expected behaviour, nothing to report then.

Thank you for your time!

On Fri, May 25, 2018 at 04:51:47PM -0400, Patrick Tasse wrote:
> Hi Aleix,
> 
> Sorry for the late reply:
> 
> The view samples the state system at regular intervals (roughly once per
> pixel, so the time of these samples depend on the zoom level).
> 
> When two consecutive states don't 'touch' each other, that means there is a
> gap and we don't know the state(s) in that gap, so we just fill it with a
> single transparent 'grey' state, as a kind of placeholder.
> 
> By slightly changing the window range or the zoom level, the samples change
> and they could hit on a 'green' state.
> 
> When you zoom in sufficiently, there are no more gaps in the sampling and
> you only see the real state colors.
> 
> Patrick
> 
> On Thu, May 17, 2018 at 10:52 AM, Aleix Roca Nonell <aleix.rocanonell@xxxxxx
> > wrote:
> 
> > Hi Patrick!
> >
> > I have just downloaded and compiled tracecompass from the eclipse git
> > repo (I have seen that your patch is merged now) and the problem is
> > now solved! Now I both see the black dots and stable states.
> >
> > Now I can perfectly analyze my application! A minor stetic issue
> > remains though. Sometimes I see small grey states, I zoom a bit, the
> > state turns green, I zoom a bit, the state turns grey again, I zoom a
> > bit, the state turns green and repeats until the colors ramains green.
> >
> > Thank you (and also tahini and TheMatthew who helped me on IRC)!!
> >
> > On Wed, May 16, 2018 at 01:15:14PM -0400, Patrick Tasse wrote:
> > > Hi Aleix,
> > >
> > > I think it's because XML Time Graph views do not draw sampling gaps at
> > all.
> > >
> > > I wrote a bug to track this [1]. Can you check if the patch [2] fixes
> > your
> > > issue?
> > >
> > > Thanks,
> > > Patrick
> > >
> > > [1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=534773
> > > [2] https://git.eclipse.org/r/122806
> > >
> > >
> > > On Wed, May 16, 2018 at 12:48 PM, Aleix Roca Nonell <
> > aleix.rocanonell@xxxxxx
> > > > wrote:
> > >
> > > > Sorry, I forgot to mention that this happens on a custom XML Time Graph
> > > > View.
> > > > I'm attaching the custom view that I'm using and an example trace
> > > > (2GiB when uncompressed).
> > > >
> > > > https://mega.nz/#!yZIi2awZ!GkWbwnQb080YfDILVaKTEHM8k1YeLY8eh6YEyqrAFsk
> > > >
> > > > I also confirm that the problem persists on the latest Trace Compass
> > night
> > > > build.
> > > >
> > > > On Wed, May 16, 2018 at 05:23:17PM +0200, Aleix Roca Nonell wrote:
> > > > > Hello list!
> > > > >
> > > > > I'm having eye ache analyzing an application with Trace Compass due
> > to
> > > > > a visualization bug which has been in mainstream for some time. I
> > have
> > > > > detected two problems:
> > > > >
> > > > >  - The fist one is missing "small black dots" that highlight events
> > > > >    not being drawn on screen because of having a too high zoom out.
> > > > >  - The second appears as I'm zooming in little by little. I see how
> > > > >    small events appear and disappear i.e. in zoom A an event (small
> > > > >    rectangle) is being drawn, but in zoom A+1 this event has
> > > > >    completely disappeared. The process repeats until events
> > > > >    "stabilize".
> > > > >
> > > > > Please, take a look at the following sequence of screenshots which
> > try
> > > > > to better ilustrate the problem. Each screenshot increases by one the
> > > > > zoom level with respect to the previous image. The correct ordering
> > is
> > > > > the timestamp in the image name (just sort it by name if downloaded).
> > > > >
> > > > > https://drive.google.com/open?id=12AcE0G33F-SIB2fDprE84eSENMGFIBqZ
> > > > >
> > > > > I'm using the last stable release of Trace Compass 3.3.0.
> > > > >
> > > > > Could you try to fix it? It's hard to find specific events if they
> > > > > only apprear when zooming in the area.
> > > > >
> > > > > Thank you!
> > > > >
> > > > > http://bsc.es/disclaimer
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