tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
tracing/selftest: Add test to test hist trigger between kernel event and trace_marker
Add a test that tests a trigger that is initiated by a kernel event
(sched_waking) and compared to a write to the trace_marker.
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
+68
+68
tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-synthetic-kernel.tc
+68
tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-synthetic-kernel.tc
···
1
+
#!/bin/sh
2
+
# SPDX-License-Identifier: GPL-2.0
3
+
# description: trace_marker trigger - test histogram with synthetic event against kernel event
4
+
# flags:
5
+
6
+
do_reset() {
7
+
reset_trigger
8
+
echo > set_event
9
+
echo > synthetic_events
10
+
clear_trace
11
+
}
12
+
13
+
fail() { #msg
14
+
do_reset
15
+
echo $1
16
+
exit_fail
17
+
}
18
+
19
+
if [ ! -f set_event ]; then
20
+
echo "event tracing is not supported"
21
+
exit_unsupported
22
+
fi
23
+
24
+
if [ ! -f synthetic_events ]; then
25
+
echo "synthetic events not supported"
26
+
exit_unsupported
27
+
fi
28
+
29
+
if [ ! -d events/ftrace/print ]; then
30
+
echo "event trace_marker is not supported"
31
+
exit_unsupported
32
+
fi
33
+
34
+
if [ ! -d events/sched/sched_waking ]; then
35
+
echo "event sched_waking is not supported"
36
+
exit_unsupported
37
+
fi
38
+
39
+
if [ ! -f events/ftrace/print/trigger ]; then
40
+
echo "event trigger is not supported"
41
+
exit_unsupported
42
+
fi
43
+
44
+
if [ ! -f events/ftrace/print/hist ]; then
45
+
echo "hist trigger is not supported"
46
+
exit_unsupported
47
+
fi
48
+
49
+
do_reset
50
+
51
+
echo "Test histogram kernel event to trace_marker latency histogram trigger"
52
+
53
+
echo 'latency u64 lat' > synthetic_events
54
+
echo 'hist:keys=pid:ts0=common_timestamp.usecs' > events/sched/sched_waking/trigger
55
+
echo 'hist:keys=common_pid:lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_waking).latency($lat)' > events/ftrace/print/trigger
56
+
echo 'hist:keys=common_pid,lat:sort=lat' > events/synthetic/latency/trigger
57
+
sleep 1
58
+
echo "hello" > trace_marker
59
+
60
+
grep 'hitcount: *1$' events/ftrace/print/hist > /dev/null || \
61
+
fail "hist trigger did not trigger correct times on trace_marker"
62
+
63
+
grep 'hitcount: *1$' events/synthetic/latency/hist > /dev/null || \
64
+
fail "hist trigger did not trigger "
65
+
66
+
do_reset
67
+
68
+
exit 0