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Subject: Re: perf report warnings on tracepoint events hidden by ui
To: Steven Rostedt <rostedt@goodmis.org>
References: <CALcN6miCRD329i_4UNjhVHOpnxgG6j8L_giLtFc5nmSGn_JQhw@mail.gmail.com>
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Cc: David Carrillo-Cisneros <davidcc@google.com>,
        Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
        Arnaldo Carvalho de Melo <acme@redhat.com>,
        Andi Kleen <andi@firstfloor.org>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Peter Zijlstra <peterz@infradead.org>, Wang Nan <wangnan0@huawei.com>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Stephane Eranian <eranian@google.com>
From: David Ahern <dsahern@gmail.com>
Message-ID: <044380c5-fce2-3327-d947-af19a33e3087@gmail.com>
Date: Thu, 27 Apr 2017 20:51:28 -0600
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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?