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c6c93242 SRRH |
1 | #!/bin/sh |
2 | # description: ftrace - function profiler with function tracing | |
3 | ||
4 | # There was a bug after a rewrite of the ftrace infrastructure that | |
5 | # caused the function_profiler not to be able to run with the function | |
6 | # tracer, because the function_profiler used the function_graph tracer | |
7 | # and it was assumed the two could not run simultaneously. | |
8 | # | |
9 | # There was another related bug where the solution to the first bug | |
10 | # broke the way filtering of the function tracer worked. | |
11 | # | |
12 | # This test triggers those bugs on those kernels. | |
13 | # | |
14 | # We need function_graph and profiling to to run this test | |
15 | if ! grep -q function_graph available_tracers; then | |
16 | echo "no function graph tracer configured" | |
17 | exit_unsupported; | |
18 | fi | |
19 | ||
20 | if [ ! -f set_ftrace_filter ]; then | |
21 | echo "set_ftrace_filter not found? Is dynamic ftrace not set?" | |
22 | exit_unsupported | |
23 | fi | |
24 | ||
25 | if [ ! -f function_profile_enabled ]; then | |
26 | echo "function_profile_enabled not found, function profiling enabled?" | |
27 | exit_unsupported | |
28 | fi | |
29 | ||
30 | fail() { # mesg | |
31 | reset_tracer | |
32 | echo > set_ftrace_filter | |
33 | echo $1 | |
44164c4b | 34 | exit $FAIL |
c6c93242 SRRH |
35 | } |
36 | ||
37 | echo "Testing function tracer with profiler:" | |
38 | echo "enable function tracer" | |
39 | echo function > current_tracer | |
40 | echo "enable profiler" | |
41 | echo 1 > function_profile_enabled | |
42 | ||
43 | sleep 1 | |
44 | ||
45 | echo "Now filter on just schedule" | |
46 | echo '*schedule' > set_ftrace_filter | |
47 | clear_trace | |
48 | ||
49 | echo "Now disable function profiler" | |
50 | echo 0 > function_profile_enabled | |
51 | ||
52 | sleep 1 | |
53 | ||
54 | # make sure only schedule functions exist | |
55 | ||
56 | echo "testing if only schedule is being traced" | |
57 | if grep -v -e '^#' -e 'schedule' trace; then | |
58 | fail "more than schedule was found" | |
59 | fi | |
60 | ||
61 | echo "Make sure schedule was traced" | |
62 | if ! grep -e 'schedule' trace > /dev/null; then | |
63 | cat trace | |
64 | fail "can not find schedule in trace" | |
65 | fi | |
66 | ||
67 | echo > set_ftrace_filter | |
68 | clear_trace | |
69 | ||
70 | sleep 1 | |
71 | ||
72 | echo "make sure something other than scheduler is being traced" | |
73 | if ! grep -v -e '^#' -e 'schedule' trace > /dev/null; then | |
74 | cat trace | |
75 | fail "no other functions besides schedule was found" | |
76 | fi | |
77 | ||
78 | reset_tracer | |
79 | ||
80 | exit 0 |