tools/testing/selftests/ftrace/test.d/instances/instance-event.tc

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: Test creation and deletion of trace instances while setting an event
   4
   5 if [ ! -d instances ] ; then
   6     echo "no instance directory with this kernel"
   7     exit_unsupported;
   8 fi
   9
  10 fail() { # mesg
  11     rmdir foo 2>/dev/null
  12     echo $1
  13     set -e
  14     exit_fail
  15 }
  16
  17 cd instances
  18
  19 # we don't want to fail on error
  20 set +e
  21
  22 mkdir x
  23 rmdir x
  24 result=$?
  25
  26 if [ $result -ne 0 ]; then
  27     echo "instance rmdir not supported"
  28     exit_unsupported
  29 fi
  30
  31 instance_slam() {
  32         while :; do
  33                 mkdir foo 2> /dev/null
  34                 rmdir foo 2> /dev/null
  35         done
  36 }
  37
  38 instance_read() {
  39         while :; do
  40                 cat foo/trace 1> /dev/null 2>&1
  41         done
  42 }
  43
  44 instance_set() {
  45         while :; do
  46                 echo 1 > foo/events/sched/sched_switch
  47         done 2> /dev/null
  48 }
  49
  50 instance_slam &
  51 p1=$!
  52 echo $p1
  53
  54 instance_set &
  55 p2=$!
  56 echo $p2
  57
  58 instance_read &
  59 p3=$!
  60 echo $p3
  61
  62 sleep 1
  63
  64 kill -1 $p3
  65 kill -1 $p2
  66 kill -1 $p1
  67
  68 echo "Wait for processes to finish"
  69 wait $p1 $p2 $p3
  70 echo "all processes finished, wait for cleanup"
  71 sleep 1
  72
  73 mkdir foo
  74 ls foo > /dev/null
  75 rmdir foo
  76 if [ -d foo ]; then
  77         fail "foo still exists"
  78 fi
  79
  80 mkdir foo
  81 echo "schedule:enable_event:sched:sched_switch" > foo/set_ftrace_filter
  82 rmdir foo
  83 if [ -d foo ]; then
  84         fail "foo still exists"
  85 fi
  86 if grep -q "schedule:enable_event:sched:sched_switch" ../set_ftrace_filter; then
  87         echo "Older kernel detected. Cleanup filter"
  88         echo '!schedule:enable_event:sched:sched_switch' > ../set_ftrace_filter
  89 fi
  90
  91 instance_slam() {
  92     while :; do
  93         mkdir x
  94         mkdir y
  95         mkdir z
  96         rmdir x
  97         rmdir y
  98         rmdir z
  99     done 2>/dev/null
 100 }
 101
 102 instance_slam &
 103 p1=$!
 104 echo $p1
 105
 106 instance_slam &
 107 p2=$!
 108 echo $p2
 109
 110 instance_slam &
 111 p3=$!
 112 echo $p3
 113
 114 instance_slam &
 115 p4=$!
 116 echo $p4
 117
 118 instance_slam &
 119 p5=$!
 120 echo $p5
 121
 122 ls -lR >/dev/null
 123 sleep 1
 124
 125 kill -1 $p1
 126 kill -1 $p2
 127 kill -1 $p3
 128 kill -1 $p4
 129 kill -1 $p5
 130
 131 echo "Wait for processes to finish"
 132 wait $p1 $p2 $p3 $p4 $p5
 133 echo "all processes finished, wait for cleanup"
 134
 135 mkdir x y z
 136 ls x y z
 137 rmdir x y z
 138 for d in x y z; do
 139         if [ -d $d ]; then
 140                 fail "instance $d still exists"
 141         fi
 142 done
 143
 144 set -e
 145
 146 exit 0