perf_header__write_pipe 1440 tools/perf/builtin-record.c 		err = perf_header__write_pipe(fd);
perf_header__write_pipe  536 tools/perf/builtin-stat.c 			err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
perf_header__write_pipe  122 tools/perf/util/header.h int perf_header__write_pipe(int fd);