There haven't been many changes, but since we occasionally get a minor error that may've been fixed upstream, let's try updating first.
- Pull down some logs from https://performance.wikimedia.org/xenon/logs/.
- Convert them all to SVGs with current version we have in puppet, and see if we can reproduce the error.
- Convert them all to SVGs with the latest version from https://github.com/brendangregg/FlameGraph/, and verify that there are no new errors, and that the output looks good.
- Submit a bug report with repro case to https://github.com/brendangregg/FlameGraph/