On Fri, Jul 03, 2020 at 03:30:32PM +0900, Namhyung Kim wrote: > On Sat, Jun 27, 2020 at 10:38 PM Changbin Du <changbin...@gmail.com> wrote: > > > > This adds support to display call trace for function tracer. To do this, > > just specify a '--func-call-graph' option. > > What if it's used with -G option? Also it might be used only with > the -T option.. How about showing a warning if it's missing.. ? > All '--func-xxx' options are function tracer only. The warning message is a good idea.
> Thanks > Namhyung > > > > > $ sudo perf ftrace -T vfs_read --func-call-graph > > iio-sensor-prox-855 [003] 6168.369657: vfs_read <-ksys_read > > iio-sensor-prox-855 [003] 6168.369677: <stack trace> > > => vfs_read > > => ksys_read > > => __x64_sys_read > > => do_syscall_64 > > => entry_SYSCALL_64_after_hwframe > > ... > > > > Signed-off-by: Changbin Du <changbin...@gmail.com> -- Cheers, Changbin Du
