TRACE Resource-usage analysis

NOTE: Analysis is applied to the current filtered view

Claims on resources can be analyzed with the resource-usage analysis under the menu. It has two items: Resource-usage graph, and resource-usage histogram.

Resource-usage graph

The resource-usage graph analysis creates a continuous signal for the resource-usage of selected resources. The analysis has two parameters:

• Use resource amount: this boolean parameter indicates whether the range of the created signal is the amount of the resource that is claimed (true value), or the number of concurrent claims on that resource (false value).
• Window width (in seconds): indicates whether a sliding-window average of the instantaneous signal should be computed. A window width of 0 computes the instantaneous resource-usage signal. If the window width is larger than 0, then the average of the instantaneous signal in the specified window is used.

Figure 1 shows an example where two resource-usage signals are added for the memory resources in the trace. These describe the amount of memory used. Note that these extensions to the trace can be removed via the "clear filters or extensions" menu ().

Resource-usage histogram

The resource-usage histogram analysis creates a histogram of the % of time that there are a certain number of concurrent claims on the resource. This is useful to see, for instance, how much of the time there are more processes running on a CPU than there are cores. The histogram is shown in a separate view, see Figure 2 for example.