2 # SPDX-License-Identifier: GPL-2.0
3 # description: ftrace - function graph filters with stack tracer
5 # Make sure that function graph filtering works, and is not
6 # affected by other tracers enabled (like stack tracer)
8 if ! grep -q function_graph available_tracers; then
9 echo "no function graph tracer configured"
13 if [ ! -f set_ftrace_filter ]; then
14 echo "set_ftrace_filter not found? Is dynamic ftrace not set?"
19 if [ -e /proc/sys/kernel/stack_tracer_enabled ]; then
20 echo 0 > /proc/sys/kernel/stack_tracer_enabled
33 # filter something, schedule is always good
34 if ! echo "schedule" > set_ftrace_filter; then
36 if ! echo ".schedule" > set_ftrace_filter; then
37 fail "can not enable schedule filter"
41 echo function_graph > current_tracer
43 if [ ! -f stack_trace ]; then
44 echo "Stack tracer not configured"
49 echo "Now testing with stack tracer"
51 echo 1 > /proc/sys/kernel/stack_tracer_enabled
58 count=`cat trace | grep '()' | grep -v schedule | wc -l`
60 if [ $count -ne 0 ]; then
61 fail "Graph filtering not working with stack tracer?"
64 # Make sure we did find something
65 count=`cat trace | grep 'schedule()' | wc -l`
66 if [ $count -eq 0 ]; then
67 fail "No schedule traces found?"
70 echo 0 > /proc/sys/kernel/stack_tracer_enabled
75 count=`cat trace | grep '()' | grep -v schedule | wc -l`
77 if [ $count -ne 0 ]; then
78 fail "Graph filtering not working after stack tracer disabled?"
81 count=`cat trace | grep 'schedule()' | wc -l`
82 if [ $count -eq 0 ]; then
83 fail "No schedule traces found?"