2 # description: ftrace - function graph filters with stack tracer
4 # Make sure that function graph filtering works, and is not
5 # affected by other tracers enabled (like stack tracer)
7 if ! grep -q function_graph available_tracers; then
8 echo "no function graph tracer configured"
12 if [ ! -f set_ftrace_filter ]; then
13 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
24 echo > set_ftrace_filter
36 # filter something, schedule is always good
37 if ! echo "schedule" > set_ftrace_filter; then
39 if ! echo ".schedule" > set_ftrace_filter; then
40 fail "can not enable schedule filter"
44 echo function_graph > current_tracer
46 if [ ! -f stack_trace ]; then
47 echo "Stack tracer not configured"
52 echo "Now testing with stack tracer"
54 echo 1 > /proc/sys/kernel/stack_tracer_enabled
61 count=`cat trace | grep '()' | grep -v schedule | wc -l`
63 if [ $count -ne 0 ]; then
64 fail "Graph filtering not working with stack tracer?"
67 # Make sure we did find something
68 count=`cat trace | grep 'schedule()' | wc -l`
69 if [ $count -eq 0 ]; then
70 fail "No schedule traces found?"
73 echo 0 > /proc/sys/kernel/stack_tracer_enabled
78 count=`cat trace | grep '()' | grep -v schedule | wc -l`
80 if [ $count -ne 0 ]; then
81 fail "Graph filtering not working after stack tracer disabled?"
84 count=`cat trace | grep 'schedule()' | wc -l`
85 if [ $count -eq 0 ]; then
86 fail "No schedule traces found?"