On Mon, Jun 14, 2021 at 07:17:53AM +0000, nakamura.shun@fujitsu.com wrote:

Hello.

perf_evsel__open cannot create an event group because it set group_fd
to -1 when it ran perf_event_open.
Is there any reason why group_fd is fixed at -1?

hi,
there'no leader link on this level yet (in struct evsel)
so this is not implemented at the moment

jirka

Best Regards
Shunsuke