I attached patch file again because no-operation is changed from "none"word to "nop" word. for example, - "wakeup preemptirqsoff preemptoff irqsoff ftrace sched_switch none\n\n" + "wakeup preemptirqsoff preemptoff irqsoff function sched_switch nop\n\n" ./trace_nop.c:struct tracer nop_trace __read_mostly = .name = "nop", .init = nop_trace_init, .reset = nop_trace_reset, .selftest = trace_selftest_startup_nop, .flags = &nop_flags, .set_flag = nop_set_flag 2009/4/6 GeunSik Lim <leemgs1@xxxxxxxxx>: > Dear Steven, > > The author of ftrace(Internal kernel Function Tracer) feature > renamed the ftrace tracer > to function to avoid further confusion between the ftrace > infrastructure and the > function tracer on Oct-20, 2008. > > But, Update of Mini-HOWTO document are still not working > . > Most of the developers often utilize "/debug/tracing/README" file > as Mini-HOWTO. > They will confuse definition and usage about ftrace between > README(ftrace) file > and available_tracers(function) file after linux-2.6.27 like me. > And, I want you to append "chrt -f 5 sleep 1" command as simple > example for latency. > > Signed-off-by: GeunSik Lim <leemgs1@xxxxxxxxx> > Signed-off-by: Steven Rostedt <srostedt@xxxxxxxxxx> > Signed-off-by: Ingo Molnar <mingo@xxxxxxx> > --- > kernel/trace/trace.c | 3 ++- > 1 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[] = > "# mkdir /debug\n" > "# mount -t debugfs nodev /debug\n\n" > "# cat /debug/tracing/available_tracers\n" > - "wakeup preemptirqsoff preemptoff irqsoff ftrace sched_switch none\n\n" > + "wakeup preemptirqsoff preemptoff irqsoff function > sched_switch none\n\n" > "# cat /debug/tracing/current_tracer\n" > "none\n" > "# echo sched_switch > /debug/tracing/current_tracer\n" > @@ -2368,6 +2368,7 @@ static const char readme_msg[] = > "noprint-parent nosym-offset nosym-addr noverbose\n" > "# echo print-parent > /debug/tracing/trace_options\n" > "# echo 1 > /debug/tracing/tracing_enabled\n" > + "# chrt -f 5 sleep 1\n" > "# cat /debug/tracing/trace > /tmp/trace.txt\n" > "echo 0 > /debug/tracing/tracing_enabled\n" > ; > > > > -- > Regards, > GeunSik Lim > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- Regards, GeunSik Lim -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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update-minihowto-ftrace-nop.patch
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