On Thu, 27 Apr 2017 20:51:28 -0600 David Ahern <dsah...@gmail.com> wrote:
> On 4/27/17 8:49 PM, Steven Rostedt wrote: > > On Thu, 27 Apr 2017 20:13:43 -0600 > > David Ahern <dsah...@gmail.com> wrote: > > > >> On 4/27/17 7:41 PM, Steven Rostedt wrote: > >>> On Thu, 27 Apr 2017 19:31:12 -0500 > >>> David Carrillo-Cisneros <davi...@google.com> wrote: > >>> > >>>> When processing tracepoint events, perf report outputs warnings about > >>>> field not founds. The warnings are usually hidden by perf report UI > >>>> and appear when using the --stdio option. e.g. > >>>> > >>>> $ perf record -e syscalls:sys_enter_mmap some_load > >> > >> '-e syscalls' vs raw_syscalls suggests an older kernel -- like RHEL6. > > > > New kernels have both syscalls and raw_syscalls. The raw_syscalls are > > the true tracepoints that the syscalls use. His option works on > > 4.11-rc8. > > > What's old is new again? > > root@kenny-jessie4:~# uname -a > Linux kenny-jessie4 4.11.0-rc8+ #258 SMP Thu Apr 27 08:36:06 PDT 2017 > x86_64 GNU/Linux > > root@kenny-jessie4:~# perf list | grep syscalls > raw_syscalls:sys_enter [Tracepoint event] > raw_syscalls:sys_exit [Tracepoint event] > > > Is an option needed to enable syscalls vs raw_syscalls? Yep! CONFIG_FTRACE_SYSCALLS=y -- Steve
