147   trace_options:
157 	trace option (also in trace_options). Options may also be set
968 trace_options  section in ftrace - Function Tracer
971 The trace_options file (or the options directory) is used to control
975   cat trace_options
1007   echo noprint-parent > trace_options
1011   echo sym-offset > trace_options
2457 	- hide: echo nofuncgraph-cpu > trace_options
2458 	- show: echo funcgraph-cpu > trace_options
2465 	- hide: echo nofuncgraph-duration > trace_options
2466 	- show: echo funcgraph-duration > trace_options
2471 	- hide: echo nofuncgraph-overhead > trace_options
2472 	- show: echo funcgraph-overhead > trace_options
2528 	- hide: echo nofuncgraph-proc > trace_options
2529 	- show: echo funcgraph-proc > trace_options
2552 	- hide: echo nofuncgraph-abstime > trace_options
2553 	- show: echo funcgraph-abstime > trace_options
2584 	- hide: echo nofuncgraph-tail > trace_options
2585 	- show: echo funcgraph-tail > trace_options
3320   set_event  snapshot  trace  trace_clock  trace_marker  trace_options
3331 affect the main buffer with the exception of trace_options. Currently,
3332 the trace_options affect all instances and the top level buffer