evsel__newtp
struct evsel *evsel = evsel__newtp("raw_syscalls", direction);
evsel = evsel__newtp("syscalls", direction);
struct evsel *evsel = evsel__newtp("sched", "sched_switch");
evsel = evsel__newtp("sched", "sched_wakeup");
evsels[i] = evsel__newtp("syscalls", name);
evsel = evsel__newtp("syscalls", "sys_enter_openat");
evsel = evsel__newtp("syscalls", "sys_enter_openat");
evsel = evsel__newtp("syscalls", "sys_enter_openat");
struct evsel *evsel = evsel__newtp(sys, name);