On Mon, 2009-04-06 at 23:17 +0900, GeunSik Lim wrote: > 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" What's the chrt for? -- 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
