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 check_filter_file set_ftrace_filter
16 if [ -e /proc/sys/kernel/stack_tracer_enabled ]; then
17 echo 0 > /proc/sys/kernel/stack_tracer_enabled
30 # filter something, schedule is always good
31 if ! echo "schedule" > set_ftrace_filter; then
33 if ! echo ".schedule" > set_ftrace_filter; then
34 fail "can not enable schedule filter"
38 echo function_graph > current_tracer
40 if [ ! -f stack_trace ]; then
41 echo "Stack tracer not configured"
46 echo "Now testing with stack tracer"
48 echo 1 > /proc/sys/kernel/stack_tracer_enabled
55 count=`cat trace | grep '()' | grep -v schedule | wc -l`
57 if [ $count -ne 0 ]; then
58 fail "Graph filtering not working with stack tracer?"
61 # Make sure we did find something
62 count=`cat trace | grep 'schedule()' | wc -l`
63 if [ $count -eq 0 ]; then
64 fail "No schedule traces found?"
67 echo 0 > /proc/sys/kernel/stack_tracer_enabled
72 count=`cat trace | grep '()' | grep -v schedule | wc -l`
74 if [ $count -ne 0 ]; then
75 fail "Graph filtering not working after stack tracer disabled?"
78 count=`cat trace | grep 'schedule()' | wc -l`
79 if [ $count -eq 0 ]; then
80 fail "No schedule traces found?"