Hardware Reports
describes two available hardware reports - Counters Overview and Counters Plot
The Hardware reports are available only if hardware counter information has been captured. There are two Hardware reports:
- Hardware Counters Overview
- Hardware Counters Plot
Hardware Counters Overview Report
The Hardware Counters Overview Report is a bar graph showing hardware counter activity by call and function, for both actual and derived PAPI metrics. While this report is displayed, options are:
- Hover the cursor over a call or function to display quantitative detail.
- Click the "arrowhead" toggles to show or hide more information.
Hardware Counters Plot
The Hardware Counters Plot displays hardware counter activity over time as a trend plot. Use this report to look for correlations between different kinds of activity. This report is most useful when there is interest in knowing when a change in activity happened rather than in knowing the precise quantity of the change.
Look for slopes, trends, and drastic changes across multiple counters. For example, a sudden decrease in floating point operations accompanied by a sudden increase in L1 cache activity may indicate a problem with caching or data locality. To zero-in on problem areas, use the calipers to narrow the focus to time-spans of interest on this graph, and then look at other reports to learn what is happening at these times.
To display the value of a specific data point, along with the maximum value, hover the cursor over the area of interest on the chart.