函数逻辑报告

函数名称：State based event timekeeping...* The basic idea is to use event->state to determine which (if any) time* fields to increment with the current delta. This means we only need to* update timestamps when we change state or when they are explicitly requested

函数原型：static __always_inline enum perf_event_state __perf_effective_state(struct perf_event *event)

返回类型：enum perf_event_state

参数：