User Guide

Contents

Hardware Event Count

Hardware Event Count
is a performance metric used by the
Intel® VTune™
Profiler
when interpreting event-based sampling analysis results. The Hardware Event Count metric shows the event count for all collected processor events. While the Hardware Sample Count metric provides the actual number of samples collected for an event, Hardware Event Counts metric estimates the number of times this event occurred during the collection (see Sample After Value).
To view the Hardware Event Count data, choose the Hardware Events viewpoint. Both grid and timeline views display Hardware Event Count by Hardware Event Type. Use the
Hardware Event Count
drop-down menu in the Timeline legend area to select an event of interest for the
Thread
area. The default event varies for different analysis types.
VTune
Profiler
shows the number of times this event occurred during the thread execution. Hover over a bar to see hardware event count at each moment of time. The
Hardware Event Type
area shows the event count distribution during the target execution for each event.
In the example above, graphs in the
Thread
area show event count for the INST_RETIRED.ANY event, while the
Hardware Event Type
area shows graphs with application-level performance per event.

Product and Performance Information

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Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.