perf_hpp__append_sort_keys 1857 tools/perf/builtin-c2c.c 	perf_hpp__append_sort_keys(&hists->list);
perf_hpp__append_sort_keys  368 tools/perf/util/hist.h void perf_hpp__append_sort_keys(struct perf_hpp_list *list);
perf_hpp__append_sort_keys 3092 tools/perf/util/sort.c 	perf_hpp__append_sort_keys(&perf_hpp_list);