136   trace_pipe:
654   per_cpu/cpu0/trace_pipe
656 	This is similar to the "trace_pipe" file, and is a consuming
669 	Like trace_pipe, this is a consuming reader, where multiple
1099 	When set, reading trace_pipe will not block when polled.
1136 	trace,trace_pipe. Example::
3174 trace_pipe  section in ftrace - Function Tracer
3177 The trace_pipe outputs the same content as the trace file, but
3179 trace_pipe is consumed. This means that subsequent reads will be
3184   # cat trace_pipe > /tmp/trace.out &
3215 Note, reading the trace_pipe file will block until more input is
3218 prevent new entries from being added. The trace_pipe file does
3379   trace_pipe  tracing_on
3411   # cat trace_pipe
3426   # cat instances/foo/trace_pipe
3439   # cat instances/bar/trace_pipe