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SubjectRe: perf report warnings on tracepoint events hidden by ui
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On 4/27/17 8:49 PM, Steven Rostedt wrote:
> On Thu, 27 Apr 2017 20:13:43 -0600
> David Ahern <dsahern@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 <davidcc@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?

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