perf-event-open-sys2 is used at run time in 3 crates (of which 1 optionally). It is a direct run-time dependency in 2 crates. It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) perf-event-open-sys2 version
600 1 perf-event-data ^5.0.3
550 1 perf-event2 ^5.0.4