root@XYZ:~# rmmod ti_prueth
root@XYZ:~# rmmod pru_rproc
root@XYZ:~# cd /sys/kernel/debug/tracing/
root@XYZ:/sys/kernel/debug/tracing#  echo 0 > tracing_on
root@XYZ:/sys/kernel/debug/tracing# echo > trace
root@XYZ:/sys/kernel/debug/tracing# echo '*:mod:ti_prueth' > set_ftrace_filter
root@XYZ:/sys/kernel/debug/tracing# echo 'function_graph' > current_tracer
root@XYZ:/sys/kernel/debug/tracing# echo 1 > tracing_on
root@XYZ:/sys/kernel/debug/tracing# modprobe ti_prueth
root@XYZ:/sys/kernel/debug/tracing# cat trace
# tracer: function_graph
#
# CPU  DURATION                  FUNCTION CALLS
# |     |   |                     |   |   |   |
1)               |  prueth_driver_init [ti_prueth]() {
1)               |    prueth_probe [ti_prueth]() {
1)               |      prueth_netdev_init [ti_prueth]() {
1)   2.750 us    |        prueth_node_port [ti_prueth]();
1)   2.250 us    |        prueth_node_mac [ti_prueth]();
1) @ 840291.9 us |      }
1) @ 841038.1 us |    }
1) @ 841923.0 us |  }