- trace (e.g. any perf counter, pid, ppid, tid, comm name, etc).
- basically, all the extra information fields to be collected with
- events are optional, specified on a per-tracing-session basis
- (except for timestamp and event id, which are mandatory).
+ trace (e.g. any PMU counter, pid, ppid, tid, comm name, etc).
+ All the extra information fields to be collected with events are
+ optional, specified on a per-tracing-session basis (except for
+ timestamp and event id, which are mandatory).