Re: [PATCH] Update old Mini-HOWTO for ftrace

[GeunSik Lim]

Sorry,
I mistake because I don't understand how to submit patch exactly.
I just appended below "singned-off" contents for convenience.
Sorry again.

   Signed-off-by: GeunSik Lim <leemgs1@xxxxxxxxx>
   Signed-off-by: Steven Rostedt <srostedt@xxxxxxxxxx>
   Signed-off-by: Ingo Molnar <mingo@xxxxxxx>

2009/4/6 GeunSik Lim <leemgs1@xxxxxxxxx>:
> I attached patch file again because no-operation is changed
> from "none"word to "nop" word.
>
> for example,
> - Â Â Â "wakeup preemptirqsoff preemptoff irqsoff ftrace sched_switch none\n\n"
> + Â Â Â "wakeup preemptirqsoff preemptoff irqsoff function sched_switch nop\n\n"
>
> ./trace_nop.c:struct tracer nop_trace __read_mostly =
>    Â.name  = "nop",
>    Â.init      = nop_trace_init,
> Â Â Â Â.reset Â= nop_trace_reset,
>    Â.selftest    = trace_selftest_startup_nop,
> Â Â Â Â.flags Â= &nop_flags,
>    Â.set_flag    = nop_set_flag
>
>
>
> 2009/4/6 GeunSik Lim <leemgs1@xxxxxxxxx>:
>> Â Dear Steven,
>>
>> Â The author of ftrace(Internal kernel Function Tracer) feature
>> renamed the ftrace tracer
>> Â Âto function to avoid further confusion between the ftrace
>> infrastructure and the
>> Â Âfunction tracer on Oct-20, 2008.
>>
>> Â ÂBut, Update of Mini-HOWTO document are still not working
>> Â Â.
>> Â ÂMost of the developers often utilize "/debug/tracing/README" file
>> as Mini-HOWTO.
>> Â ÂThey will confuse definition and usage about ftrace Âbetween
>> README(ftrace) file
>> Â Âand available_tracers(function) file after linux-2.6.27 like me.
>> Â ÂAnd, I want you to append "chrt -f 5 sleep 1" command as simple
>> example for latency.
>>
>> Â ÂSigned-off-by: GeunSik Lim <leemgs1@xxxxxxxxx>
>> Â ÂSigned-off-by: Steven Rostedt <srostedt@xxxxxxxxxx>
>> Â ÂSigned-off-by: Ingo Molnar <mingo@xxxxxxx>
>> ---
>> Âkernel/trace/trace.c | Â Â3 ++-
>> Â1 files changed, 2 insertions(+), 1 deletions(-)
>>
>> diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
>> index a0174a4..15f0eec 100644
>> --- a/kernel/trace/trace.c
>> +++ b/kernel/trace/trace.c
>> @@ -2358,7 +2358,7 @@ static const char readme_msg[] =
>> Â Â Â Â"# mkdir /debug\n"
>> Â Â Â Â"# mount -t debugfs nodev /debug\n\n"
>> Â Â Â Â"# cat /debug/tracing/available_tracers\n"
>> - Â Â Â "wakeup preemptirqsoff preemptoff irqsoff ftrace sched_switch none\n\n"
>> + Â Â Â "wakeup preemptirqsoff preemptoff irqsoff function
>> sched_switch none\n\n"
>> Â Â Â Â"# cat /debug/tracing/current_tracer\n"
>> Â Â Â Â"none\n"
>> Â Â Â Â"# echo sched_switch > /debug/tracing/current_tracer\n"
>> @@ -2368,6 +2368,7 @@ static const char readme_msg[] =
>> Â Â Â Â"noprint-parent nosym-offset nosym-addr noverbose\n"
>> Â Â Â Â"# echo print-parent > /debug/tracing/trace_options\n"
>> Â Â Â Â"# echo 1 > /debug/tracing/tracing_enabled\n"
>> + Â Â Â "# chrt -f 5 sleep 1\n"
>> Â Â Â Â"# cat /debug/tracing/trace > /tmp/trace.txt\n"
>> Â Â Â Â"echo 0 > /debug/tracing/tracing_enabled\n"
>> Â;
>>
>>
>>
>> --
>> Regards,
>> GeunSik Lim
>> --
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>
>
>
> --
> Regards,
> GeunSik Lim
> --
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-- 
Regards,
GeunSik Lim
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