change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/tools/perf/Documentation/perf-ftrace.txt
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@@ -24,15 +24,28 @@
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 -t::
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 --tracer=::
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-	Tracer to use: function_graph or function.
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+	Tracer to use when neither -G nor -F option is not
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+	specified: function_graph or function.
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 -v::
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 --verbose=::
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         Verbosity level.
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+-F::
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+--funcs::
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+        List available functions to trace. It accepts a pattern to
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+        only list interested functions.
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+
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 -p::
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 --pid=::
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 	Trace on existing process id (comma separated list).
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+
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+--tid=::
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+	Trace on existing thread id (comma separated list).
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+
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+-D::
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+--delay::
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+	Time (ms) to wait before starting tracing after program start.
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 -a::
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 --all-cpus::
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@@ -48,39 +61,58 @@
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 	Ranges of CPUs are specified with -: 0-2.
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 	Default is to trace on all online CPUs.
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+-m::
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+--buffer-size::
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+	Set the size of per-cpu tracing buffer, <size> is expected to
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+	be a number with appended unit character - B/K/M/G.
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+
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+--inherit::
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+	Trace children processes spawned by our target.
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+
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 -T::
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 --trace-funcs=::
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-	Only trace functions given by the argument.  Multiple functions
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-	can be given by using this option more than once.  The function
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-	argument also can be a glob pattern.  It will be passed to
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-	'set_ftrace_filter' in tracefs.
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+	Select function tracer and set function filter on the given
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+	function (or a glob pattern). Multiple functions can be given
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+	by using this option more than once. The function argument also
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+	can be a glob pattern. It will be passed to 'set_ftrace_filter'
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+	in tracefs.
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 -N::
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 --notrace-funcs=::
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-	Do not trace functions given by the argument.  Like -T option,
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-	this can be used more than once to specify multiple functions
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-	(or glob patterns).  It will be passed to 'set_ftrace_notrace'
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-	in tracefs.
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+	Select function tracer and do not trace functions given by the
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+	argument.  Like -T option, this can be used more than once to
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+	specify multiple functions (or glob patterns).  It will be
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+	passed to 'set_ftrace_notrace' in tracefs.
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+
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+--func-opts::
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+	List of options allowed to set:
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+	  call-graph - Display kernel stack trace for function tracer.
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+	  irq-info   - Display irq context info for function tracer.
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 -G::
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 --graph-funcs=::
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-	Set graph filter on the given function (or a glob pattern).
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-	This is useful for the function_graph tracer only and enables
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-	tracing for functions executed from the given function.
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-	This can be used more than once to specify multiple functions.
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-	It will be passed to 'set_graph_function' in tracefs.
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+	Select function_graph tracer and set graph filter on the given
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+	function (or a glob pattern). This is useful to trace for
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+	functions executed from the given function. This can be used more
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+	than once to specify multiple functions. It will be passed to
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+	'set_graph_function' in tracefs.
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 -g::
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 --nograph-funcs=::
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-	Set graph notrace filter on the given function (or a glob pattern).
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-	Like -G option, this is useful for the function_graph tracer only
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-	and disables tracing for function executed from the given function.
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-	This can be used more than once to specify multiple functions.
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-	It will be passed to 'set_graph_notrace' in tracefs.
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+	Select function_graph tracer and set graph notrace filter on the
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+	given function (or a glob pattern). Like -G option, this is useful
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+	for the function_graph tracer only and disables tracing for function
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+	executed from the given function. This can be used more than once to
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+	specify multiple functions. It will be passed to 'set_graph_notrace'
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+	in tracefs.
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--D::
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---graph-depth=::
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-	Set max depth for function graph tracer to follow
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+--graph-opts::
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+	List of options allowed to set:
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+	  nosleep-time - Measure on-CPU time only for function_graph tracer.
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+	  noirqs       - Ignore functions that happen inside interrupt.
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+	  verbose      - Show process names, PIDs, timestamps, etc.
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+	  thresh=<n>   - Setup trace duration threshold in microseconds.
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+	  depth=<n>    - Set max depth for function graph tracer to follow.
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 SEE ALSO
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