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 echo 0 > /proc/sys/kernel/stack_tracer_enabled
22 echo > set_ftrace_filter
34 # filter something, schedule is always good
35 if ! echo "schedule" > set_ftrace_filter; then
37 if ! echo ".schedule" > set_ftrace_filter; then
38 fail "can not enable schedule filter"
42 echo function_graph > current_tracer
44 if [ ! -f stack_trace ]; then
45 echo "Stack tracer not configured"
50 echo "Now testing with stack tracer"
52 echo 1 > /proc/sys/kernel/stack_tracer_enabled
59 count=`cat trace | grep '()' | grep -v schedule | wc -l`
61 if [ $count -ne 0 ]; then
62 fail "Graph filtering not working with stack tracer?"
65 # Make sure we did find something
66 count=`cat trace | grep 'schedule()' | wc -l`
67 if [ $count -eq 0 ]; then
68 fail "No schedule traces found?"
71 echo 0 > /proc/sys/kernel/stack_tracer_enabled
76 count=`cat trace | grep '()' | grep -v schedule | wc -l`
78 if [ $count -ne 0 ]; then
79 fail "Graph filtering not working after stack tracer disabled?"
82 count=`cat trace | grep 'schedule()' | wc -l`
83 if [ $count -eq 0 ]; then
84 fail "No schedule traces found?"