Function setup_perf_events 

pub(crate) fn setup_perf_events(
    skel: &mut BpfSkel<'_>,
    cpu: i32,
    perf_config: u64,
    counter_idx: u32,
) -> Result<()>

Setup performance counter events for a specific CPU and counter index. counter_idx 0 = migration event (-e), 1 = sticky event (-y).