Em Fri, Aug 14, 2020 at 08:56:55AM -0300, Arnaldo Carvalho de Melo escreveu: > Em Sat, Aug 08, 2020 at 10:31:28AM +0800, Changbin Du escreveu: > > 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 > > We have: > > # perf report -h header > > Usage: perf report [<options>] > > --header Show data header. > --header-only Show only data header. > > # > > So perhaps we should have those as well, in the 'ftrace' case one would > perhaps want to use --no-header, for instance, to do some scripting > parsing just the trace lines.
This as well can be done after I process this series, to make progress. Applied. - Arnaldo
