Em Fri, Jul 03, 2020 at 03:20:15PM +0900, Namhyung Kim escreveu: > On Sat, Jun 27, 2020 at 10:38 PM Changbin Du <changbin...@gmail.com> wrote: > > > > This makes perf-ftrace display column header before printing trace. > > > > $ sudo perf ftrace > > \# tracer: function > > \# > > \# entries-in-buffer/entries-written: 0/0 #P:8 > > \# > > \# TASK-PID CPU# TIMESTAMP FUNCTION > > \# | | | | | > > <...>-9246 [006] 10726.262760: mutex_unlock <-rb_simple_write > > <...>-9246 [006] 10726.262764: __fsnotify_parent <-vfs_write > > <...>-9246 [006] 10726.262765: fsnotify <-vfs_write > > <...>-9246 [006] 10726.262766: __sb_end_write <-vfs_write > > <...>-9246 [006] 10726.262767: fpregs_assert_state_consistent > > <-do_syscall_64 > > You'd better indent the example output by 2 spaces to prevent > the # signs commented out.
Yes, all examples need to be two spaces to the right, to avoid things like that. - Arnaldo > Thanks > Namhyung > > > > > > Signed-off-by: Changbin Du <changbin...@gmail.com> > > --- > > tools/perf/builtin-ftrace.c | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c > > index e45496012611..686d744d5025 100644 > > --- a/tools/perf/builtin-ftrace.c > > +++ b/tools/perf/builtin-ftrace.c > > @@ -430,6 +430,9 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace, int > > argc, const char **argv) > > fcntl(trace_fd, F_SETFL, O_NONBLOCK); > > pollfd.fd = trace_fd; > > > > + /* display column headers */ > > + read_tracing_file_to_stdout("trace"); > > + > > if (!ftrace->initial_delay) { > > if (write_tracing_file("tracing_on", "1") < 0) { > > pr_err("can't enable tracing\n"); > > -- > > 2.25.1 > > -- - Arnaldo