131   trace_pipe:
620   per_cpu/cpu0/trace_pipe
622 	This is similar to the "trace_pipe" file, and is a consuming
635 	Like trace_pipe, this is a consuming reader, where multiple
1065 	When set, reading trace_pipe will not block when polled.
1102 	trace,trace_pipe. Example::
3116 trace_pipe  section in ftrace - Function Tracer
3119 The trace_pipe outputs the same content as the trace file, but
3121 trace_pipe is consumed. This means that subsequent reads will be
3126   # cat trace_pipe > /tmp/trace.out &
3157 Note, reading the trace_pipe file will block until more input is
3160 prevent new entries from being added. The trace_pipe file does
3321   trace_pipe  tracing_on
3353   # cat trace_pipe
3368   # cat instances/foo/trace_pipe
3381   # cat instances/bar/trace_pipe