hi,
adding support for creating event groups based on the way they
are specified on the command line.
This patchset adds the '{}' style grammar to express event group,
allowing so far only the 'event modifier' as group modifier.
The sample/leader modifier changes are ready, but I'm getting
some weird numbers in tests, so I'll send it later. Meanwhile,
it'd be nice to have at least this patchset in.. ;)
Attached patches:
1/3 perf, tool: Add support to parse event group syntax
2/3 perf, tool: Enable grouping logic for parsed events
3/3 perf, test: Add automated tests for event group parsing