The Profiler Control Panel

Regardless of which profiling task you choose, the IDE will display the Profiler Control Panel (shown in Figure 15-3).

Figure 15-3. Profiler Control Panel

Each section of the Profiler Control Panel can be expanded or hidden by clicking the arrow icon next to the name of the section.

Controls

See Table 15-1 for an explanation of the buttons in the Profiler Control Panel Controls section.

Table 15-1. Profiler Control Panel Controls

Component	Description
	ReRun Last Profiling (Ctrl-Shift-F2) Run the last profiling command again.
	Stop Stops the current profiling command. Also stops the target application if the application was started by the profiler.
	Reset Collected Results Discards the already accumulated profiling results.
	Run GC Runs garbage collection.
	Modify Profiling (Alt-Shift-F2) Opens the Modify Profiling Task dialog box and allows you to run a new profiling command without stopping the target application.
	VM Telemetry Opens the VM Telemetry Overview in the Output window of the IDE, displaying smaller versions of the telemetry graphs.

Status

See Table 15-2 for an explanation of the entries in the Profiler Control Panel Status section.

Table 15-2. Profiler Control Panel Status

Component	Description
Type	The type of profiling: Monitor, CPU, or Memory
Configuration	Indicates whether the profiler was started with one of its preset configurations
Status	Running or Inactive

Profiling Results

See Table 15-3 for an explanation of the entries in the Profiler Control Panel Profiling Results section.

Table 15-3. Profiler Control Panel Profiling Results

Component	Description
	Take Snapshot Displays a static snapshot of the profiling results accumulated thus far
	Live Results Displays the current results of the profiling task
	Reset Collected Results Discards the already accumulated profiling results

Saved Snapshots

Enables you to manage the profiling snapshots associated with your project. When you select an open project in the combo box, the saved snapshots associated with that project are displayed. Double-clicking the name of the snapshot opens the snapshot in the Source Editor window.

View

See Table 15-4 for an explanation of the entries in the Profiler Control Panel View section.

Table 15-4. Profiler Control Panel View

Component	Description
	VM Telemetry Opens the VM Telemetry tab. The VM Telemetry tab displays high-level data on thread activity and memory heap and garbage collection in the JVM.
	Threads Opens the Threads tab. When Enable Threads Monitoring is selected in the Select Profiling Task dialog box, application thread activity is displayed in the Threads tab.

Basic Telemetry

See Table 15-5 for an explanation of the entries in the Profiler Control Panel Basic Telemetry section. You can see the graphic presentation of some of this information by clicking the VM Telemetry and Threads buttons in the View section.

Table 15-5. Profiler Control Panel Basic Telemetry

Component	Description
Instrumented	When doing memory profiling, the number of classes with profiler instrumentation; when doing CPU performance profiling, the number of methods with profiler instrumentation.
Filter	Type of filter (if any) that was specified.
Threads	Number of active threads.
Total Memory	Allocated size of the heap.
Used Memory	Portion of the heap that is in use.
Time Spent in GC	Percentage of time spent performing garbage collection.