When optimizing performance of a game or some other program, the most important thing is to get hard data first – to profile it using some tools, to see what is happening and where to focus attention. There are many profiling tools available. When talking about graphics, we realize that GPU is really a co-processor that can execute submitted work at its own pace, therefore GPU profiling tools offer a specific type of graph to visualize it. In this article, I will explain how to read this type of graph.

Original article:
https://asawicki.info/news_1747_understanding_graphs_in_gpuview_and_rgp