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

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