On Mon, 2009-04-06 at 23:02 +0900, GeunSik Lim wrote: > 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" > ; > Actually Nikanth sent a similar patch a month ago, but somehow it slipped under the radar. I'll be picking that one up instead. http://lkml.org/lkml/2009/3/23/24 But thanks anyway. -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
