Author Archives: Owen

Frame Timing: the Simple Way

This is a follow-up to my post from last week; I wanted to look into why the different methods of frame timing looked different from each other. As a starting point, we can graph the position position of a moving object (like the ball) as displayed to the user versus it’s theoretical position (gray line): […]

What to do if you can’t do 60fps?

I’ve been working recently on figuring out application to compositor synchronization. One aspect of that is the timing information does the compositor need to send back to the application and how should the application use it. In the case where everything is lightly loaded and we can hit 60fps, it’s pretty obvious what we want […]

Benchmarking compositor performance

Recently Phoronix did an article about performance under different compositing and non-compositing window managers. GNOME Shell didn’t do that well, so lots of people pointed it out to me. Clearly there was a lot of work put into making measurements for the article, but what is measured is a wide range of 3D fullscreen games […]

What does the user see?

As a long-time GNOME module maintainer and as a team lead within Red Hat, I often get people coming to me for advice about some technical issue or another. And no matter the issue, there’s one question that I’ll almost always end up asking at some point: “what does the user see?” Code, APIs, protocols […]

Setting Goals for GNOME

Often in GNOME, we think of goal setting is something that we can leave up to the board, or up to the marketing team. An appearance of direction that we layer on top of the what we are really working on. This is obviously backwards … everybody in GNOME should consider the goals of GNOME […]


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