Collecting Data From mttest for Hardware Counter Profiling Tutorial - Oracle® Developer Studio 12.5: Performance Analyzer Tutorials

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Collecting Data From `mttest` for Hardware Counter Profiling Tutorial

The easiest way to collect the data is to run the following command in the mttest directory:

% make hwcperf

The hwcperf target of the Makefile launches a collect command and records an experiment.

Note - This tutorial might take a longer time compiling and collecting data than the previous introductory tutorials.

The experiment is named test.1.er by default and contains clock-profiling data and hardware counter profiling data for three counters: inst (instructions), cycles (cycles), and dcm (data-cache-misses).

If your system does not support a cycles counter or a dcm counter, the collect command will fail. In that case, edit the Makefile to move the # sign to the appropriate line to enable the HWC_OPT variable that specifies only those counters that are supported on your system. The experiment will not have the data from those counters that were omitted.

Tip - You can use the command collect -h to determine which counters your system does support. For information about the hardware counters, see Hardware Counter Lists in Oracle Developer Studio 12.5: Performance Analyzer.