[lkml]   [2020]   [May]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [RFC] perf/core: allow ftrace for functions in kernel/event/core.c

> On May 26, 2020, at 2:39 PM, Peter Zijlstra <> 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?


 \ /
  Last update: 2020-05-26 23:48    [W:0.134 / U:1.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site