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