One of the maintainers here -- it should work on Broadwell if you're not super keen on the tens-of-nanoseconds timing precision and are okay with microsecond precision (i.e. only want accurate callstacks),

  grep intel_pt /proc/cpuinfo

should do the trick.

Thank you! I was really disappointed none of the readme actually said what the extension name was.....

You may also be interested in this wiki page: <https://github.com/janestreet/magic-trace/wiki/Supported-pla...>

Intel PT has a bunch of rough edges that we've tried to paper over in magic-trace, but the gritty caveats are documented in the wiki.