Response Time Comparison Graph (xls)

• It wasn't easy - three graphs on a single chart •

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This tool makes it easy to both numerically and graphically compare three different performance situations in a response time focused manner. Each of the three cases allows input for the arrival rate (workload), service time, and number of CPU cores or effective IO devices. All three cases are displayed on a single response time chart.

The numerical output for each case is the calculated utilization, queue time and response time. All three response time curves are color coded and combined into a single chart. Furthermore, the situation for each case is highlighted by a large data plot circle. This tool makes it very easy to show the current situation and two possible performance enhancing solutions.

Craig uses this tool when teaching and consulting because it's a great way to communicate the current situation and two "what if" scenarios.

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