imlock :
I dont understand the "unevenness" graph. Is there any explanation of it in another article?
We break down all of our data capture and analysis here: http://www.tomshardware.com/reviews/presentmon-performance-directx-opengl-vulkan,4740.html
Page 3 has some explanation of smoothness and how we reach these metrics. Since publishing that piece, we've switched to presenting the information in the bar graph that you see (rather than the line graphs on page 3 of our PresentMon overview). For unevenness, then, we are looking at the frame to frame differences -- so the percentage of the frame to frame differences within each threshold up to 10 ms.