Sample Countwindow to analyze the actual number of samples collected for a processor event.
Sample Countpane attributes the
Hardware Event Sample Count by Hardware Event Typeto program units. The
Hardware Event Sample Countmetric provides the actual number of samples collected for an event.
By default, the data in the grid is sorted by the Instruction Retired event.
The list of hardware events depends on the analysis type. You may right-click an event column and select the
What's This Columncontext menu option to open the description of the selected event.
When you explore the hardware events statistics for a result, you may drag and drop the columns in the grid for your convenience.
VTuneautomatically saves your preferences and keeps the columns order for subsequent result views.
The Timeline pane is synchronized with the
Sample Countpane. The
Threadarea of the
Timelinepane shows the number of samples collected for the selected event (INST_RETIRED.ANY in the example below) while a thread was running. You may use the
Hardware Event Sample Countdrop-down menu in the legend area to choose a different event.
Hardware Event Typearea shows the application-level performance per each event.
If you selected the
Collect stacksoption for the hardware event-based sampling analysis, the
VTuneprovides the Call Stack pane. Use this pane to navigate between stacks and analyze the distribution of the sample count for the object selected in the
Sample Countpane. For the example below, you select the Instructions Retired to see stacks leading to the
grid_intersectfunction and contributing to this event. You can use this data to identify the most performance-critical stacks with the highest contribution to the object's Instructions Retired value.