Both the normal conformance and regression tests and the supplemental performance tests work.

To run the conformance and regression tests with the parallel mode active,

 make check-parallel
 

The log and summary files for conformance testing are in the testsuite/parallel directory.

To run the performance tests with the parallel mode active,

 make check-performance-parallel
 

The result file for performance testing are in the testsuite directory, in the file libstdc++_performance.sum. In addition, the policy-based containers have their own visualizations, which have additional software dependencies than the usual bare-boned text file, and can be generated by using the make doc-performance rule in the testsuite's Makefile.