6.1. Result Notes

To visualize the information I've plotted two graphs for each test run:

1. A measurement/load graph

2. A histogram

For each of the measurement/load graphs:

• pink - is the maximum latency value recorded

• red - is each individual latency duration value plotted

• green - is the average latency

• dark blue - is the minimum latency value recorded

• light blue - is the loadavg

• yellow polygon - indicates the "busyness" of the target. The busyness is measured as: (1 - (total idle seconds / total seconds uptime)).

• The measurements (latency, max latency, min latency, average latency) use the Y-axis on the left of the graph. The loadavg uses the Y-axis on the right. The busyness uses neither axis, it is drawn in such a way so that the height of the box is always 100% busy.

It should be noted that there is a bug with enabling CONFIG_PREEMPT_RCU on a heavily loaded system, therefore when I had a choice I would not enable this option.