> On May 26, 2020, at 2:39 PM, Peter Zijlstra <pet...@infradead.org> wrote:
>
> On Tue, May 26, 2020 at 02:28:26PM -0700, Song Liu wrote:
>> It is useful to trace functions in kernel/event/core.c. Allow ftrace for
>> them by removing $(CC_FLAGS_FTRACE) from Makefile.
>
> Did you try using the ftrace event with perf with this on?
I have tried a few things, like
perf stat -e probe:perf_read -I 1000
perf record -e probe:__x64_sys_perf_event_open -aR
They all work fine.
Do you have some tricky functions that we should double check?
Thanks,
Song
