projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 43bb45da | 1 | #!/bin/sh |
| b2441318 | 2 | # SPDX-License-Identifier: GPL-2.0 |
| 43bb45da | 3 | # description: ftrace - test for function event triggers |
| 6df0fee3 | 4 | # flags: instance |
| 43bb45da SRV |
5 | # |
| 6 | # Ftrace allows to add triggers to functions, such as enabling or disabling | |
| 7 | # tracing, enabling or disabling trace events, or recording a stack trace | |
| 8 | # within the ring buffer. | |
| 9 | # | |
| 10 | # This test is designed to test event triggers | |
| 11 | # | |
| 12 | ||
| 13 | # The triggers are set within the set_ftrace_filter file | |
| 14 | if [ ! -f set_ftrace_filter ]; then | |
| 15 | echo "set_ftrace_filter not found? Is dynamic ftrace not set?" | |
| 16 | exit_unsupported | |
| 17 | fi | |
| 18 | ||
| 19 | do_reset() { | |
| 20 | reset_ftrace_filter | |
| 21 | reset_tracer | |
| 22 | disable_events | |
| 23 | clear_trace | |
| 24 | enable_tracing | |
| 25 | } | |
| 26 | ||
| 27 | fail() { # mesg | |
| 28 | do_reset | |
| 29 | echo $1 | |
| 30 | exit $FAIL | |
| 31 | } | |
| 32 | ||
| 33 | SLEEP_TIME=".1" | |
| 34 | ||
| 35 | do_reset | |
| 36 | ||
| 37 | echo "Testing function probes with events:" | |
| 38 | ||
| 39 | EVENT="sched:sched_switch" | |
| 40 | EVENT_ENABLE="events/sched/sched_switch/enable" | |
| 41 | ||
| 42 | cnt_trace() { | |
| 43 | grep -v '^#' trace | wc -l | |
| 44 | } | |
| 45 | ||
| 46 | test_event_enabled() { | |
| 47 | val=$1 | |
| 48 | ||
| 49 | e=`cat $EVENT_ENABLE` | |
| 50 | if [ "$e" != $val ]; then | |
| 51 | echo "Expected $val but found $e" | |
| d2ffb8d3 | 52 | exit 1 |
| 43bb45da SRV |
53 | fi |
| 54 | } | |
| 55 | ||
| 56 | run_enable_disable() { | |
| 57 | enable=$1 # enable | |
| 58 | Enable=$2 # Enable | |
| 59 | check_disable=$3 # 0 | |
| 60 | check_enable_star=$4 # 1* | |
| 61 | check_disable_star=$5 # 0* | |
| 62 | ||
| 63 | cnt=`cnt_trace` | |
| 64 | if [ $cnt -ne 0 ]; then | |
| 65 | fail "Found junk in trace file" | |
| 66 | fi | |
| 67 | ||
| 68 | echo "$Enable event all the time" | |
| 69 | ||
| 70 | echo $check_disable > $EVENT_ENABLE | |
| 71 | sleep $SLEEP_TIME | |
| 72 | ||
| 73 | test_event_enabled $check_disable | |
| 74 | ||
| 75 | echo "schedule:${enable}_event:$EVENT" > set_ftrace_filter | |
| bc5f1598 MH |
76 | if [ -d ../../instances ]; then # Check instances |
| 77 | cur=`cat set_ftrace_filter` | |
| 78 | top=`cat ../../set_ftrace_filter` | |
| 79 | if [ "$cur" = "$top" ]; then | |
| 80 | echo "This kernel is too old to support per instance filter" | |
| 81 | reset_ftrace_filter | |
| 82 | exit_unsupported | |
| 83 | fi | |
| 84 | fi | |
| 43bb45da SRV |
85 | |
| 86 | echo " make sure it works 5 times" | |
| 87 | ||
| 88 | for i in `seq 5`; do | |
| 89 | sleep $SLEEP_TIME | |
| 90 | echo " test $i" | |
| 91 | test_event_enabled $check_enable_star | |
| 92 | ||
| 93 | echo $check_disable > $EVENT_ENABLE | |
| 94 | done | |
| 95 | sleep $SLEEP_TIME | |
| 96 | echo " make sure it's still works" | |
| 97 | test_event_enabled $check_enable_star | |
| 98 | ||
| 99 | reset_ftrace_filter | |
| 100 | ||
| 101 | echo " make sure it only works 3 times" | |
| 102 | ||
| 103 | echo $check_disable > $EVENT_ENABLE | |
| 104 | sleep $SLEEP_TIME | |
| 105 | ||
| 106 | echo "schedule:${enable}_event:$EVENT:3" > set_ftrace_filter | |
| 107 | ||
| 108 | for i in `seq 3`; do | |
| 109 | sleep $SLEEP_TIME | |
| 110 | echo " test $i" | |
| 111 | test_event_enabled $check_enable_star | |
| 112 | ||
| 113 | echo $check_disable > $EVENT_ENABLE | |
| 114 | done | |
| 115 | ||
| 116 | sleep $SLEEP_TIME | |
| 117 | echo " make sure it stop working" | |
| 118 | test_event_enabled $check_disable_star | |
| 119 | ||
| 120 | do_reset | |
| 121 | } | |
| 122 | ||
| 123 | run_enable_disable enable Enable 0 "1*" "0*" | |
| 124 | run_enable_disable disable Disable 1 "0*" "1*" |