SINGLE_KEY        218 tools/perf/builtin-lock.c SINGLE_KEY(nr_contended)
SINGLE_KEY        219 tools/perf/builtin-lock.c SINGLE_KEY(avg_wait_time)
SINGLE_KEY        220 tools/perf/builtin-lock.c SINGLE_KEY(wait_time_total)
SINGLE_KEY        221 tools/perf/builtin-lock.c SINGLE_KEY(wait_time_max)