On Mon, Dec 17, 2018 at 09:52:04AM +0530, Amit Daniel Kachhap wrote:

There is no error message or crash but no useful output like below,

/sys/kernel/tracing # echo wake_up_process > set_graph_function
/sys/kernel/tracing # echo function_graph > current_tracer
/sys/kernel/tracing # cat trace
# tracer: function_graph
#
# CPU  DURATION                  FUNCTION CALLS
# |     |   |                     |   |   |   |

Confirmed. The graph tracer self-test passes, but when used, there is no
output.

	Torsten


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