ftrace: sched_switch plugin is deprecated (1e42e83f) · Commits · 戴 / test

Actually, sched_switch function tracer is merged into wakeup/wakeup_rt Update 'mini-HOWTO' for ftrace(Kernel function tracer). If we want to trace "sched:sched_switch" to trace sched_switch func, We may utilize event option.(e.g: trace-cmd list -e | grep sched) This patch is based on Linux-3.3.rc2-SMP-PREEMPT Link: http://lkml.kernel.org/r/1328695537-15081-1-git-send-email-geunsik.lim@gmail.com Cc: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by:

Geunsik Lim <geunsik.lim@samsung.com> Signed-off-by:

Steven Rostedt <rostedt@goodmis.org>

kernel/trace/trace.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -2764,12 +2764,12 @@ static const char readme_msg[] =
		"tracing mini-HOWTO:\n\n"
		"# mount -t debugfs nodev /sys/kernel/debug\n\n"
		"# cat /sys/kernel/debug/tracing/available_tracers\n"
		"wakeup preemptirqsoff preemptoff irqsoff function sched_switch nop\n\n"
		"wakeup wakeup_rt preemptirqsoff preemptoff irqsoff function nop\n\n"
		"# cat /sys/kernel/debug/tracing/current_tracer\n"
		"nop\n"
		"# echo sched_switch > /sys/kernel/debug/tracing/current_tracer\n"
		"# echo wakeup > /sys/kernel/debug/tracing/current_tracer\n"
		"# cat /sys/kernel/debug/tracing/current_tracer\n"
		"sched_switch\n"
		"wakeup\n"
		"# cat /sys/kernel/debug/tracing/trace_options\n"
		"noprint-parent nosym-offset nosym-addr noverbose\n"
		"# echo print-parent > /sys/kernel/debug/tracing/trace_options\n"

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