Histogram

lower portion of the GPU Time Line report

The lower portion of the GPU Time Line report window shows the histogram and related controls.

Kern, In, Out, Wait

The radio buttons to the left of the histogram select what information is displayed in the histogram and are mutually exclusive. Wait displays an aggregate of CPU functions that wait for something else to complete. Kern, In, and Out are GPU-related and quantify where time on the GPU is spent. Each histogram shows how much time was spent in the selected category during the specified interval. The measurements are in percent, with the full height of the window representing 100%.

PE, TH

The PE and TH entry boxes enable filtering of what is displayed by PE and thread. These are set to zero by default.

time line, Zoom

By default, the time line below the histogram represents the entire duration of the program execution, unless the Zoom control is used to change the scale. The red vertical bar is the center-point of the current display. The horizontal scroll bar below the histogram is generally inactive, unless the Zoom control is used to zoom-in on some activity.