QApitrace OpenGL profiling view

[José Fonseca]

Hi Alex,

Sorry for the delay.  James Benton wrote the Qt graph display for
profiling.  I was hoping he could comment, but forgot to star this ended up
forgetting to reply myself.

I didn't look at the code, but from what I can see from the screenshots it
looks great and I'm happy to get it commited.

Requiring Qt 5.3 is not an issue.  Visual Studio 2015 requires Qt 5.6
anyway.

Generally, I'd prefer to avoid depending on OpenGL, to avoid hitting issues
when debugging OpenGL drivers. But profiling view is OK -- were not
searhcing for bugs when using it.  And there's always the possibility of
falling back to llvmpipe for qapitrace.  Do you know if it works reasonably
well with llvmpipe?

Jose


On Wed, Aug 10, 2016 at 11:02 PM, Alex Tru <alxtry at gmail.com> wrote:

> Hi,
>
> I’m developing a new OpenGL profiling view for QApitrace. I’m pursuing
> several goals with that:
>
>     1) Support new profiling counters. Currently we have only CPU/GPU
> time histograms in the view. Last year, I contributed an abstraction
> for different OpenGL profiling backends which got merged, I’ve also
> added support for both the INTEL_perfquery and AMD_perfmon GL
> extensions. This allowed us to output CSV files containing the
> performance counters’ metrics when replaying traces with glretrace.
> The plan for this year’s project is to integrate it in QApitrace to
> make it easier to use and visualize the data.
>     2) Since I’m planning to display a lot of data in the view,
> there’s a need to provide graphing tools with reasonable performance.
> I’ve chosen to use a combination of raw OpenGL and QML for that. The
> performance is better than that of QPainter based, especially for
> large amounts of data (but it still can be laggy on some HW).
>     3) Improve user experience. Well, currently I haven’t improved a
> lot (if not anything). But I would like to collect opinions on this
> topic.
>
> My development tree is here: https://github.com/trtt/apitrace/tree/guiwip2
> I had to increase requirements up to Qt 5.3 and OpenGL 3.2. Do you
> think this is acceptable?
>
> Here are some screenshots, just in case:
> https://www.dropbox.com/sh/wntm6hk6fyhsr8j/AAANIoCyni1XqGez78K8Wo01a?dl=0
>
> It’s in a quite early state at the moment, but you can generally
> estimate what to expect. Compiling glretrace and qapitrace should be
> enough. New profiling view can be found in the menu (Trace -> Profile
> with backends). Old metrics are all available, new ones are most
> likely to be found on Mesa for Intel gen 5-8 and for some in Nouveau,
> also proprietary AMD drivers can feature some. You can expect to see
> timelines and plots for metrics chosen for different shader programs.
> Controls are a bit awkward now, but you can drag view to scroll and
> use <Ctrl+Wheel> to zoom.
>
> I am basically writing to know:
> 1) Do you think this new profiling view can find its place in QApitrace?
> 2) If yes, what features would you like to see in it?
>
> If you are interested, you can also check out my TODO list:
> https://trello.com/b/EY0CAw0b/prof-gui-apitrace
> _______________________________________________
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> apitrace at lists.freedesktop.org
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>
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