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| author |   Masami Hiramatsu <mhiramat@kernel.org> | 2018-07-14 01:28:44 +0900 |
|---|---|---|
| committer |   Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-07-25 10:29:42 -0400 |
| commit | 82f4f3e69c5c29bce940dd87a2c0f16c51d48d17 (patch) | |
| tree | 1bf77c0ee17dfb017ee32b09c341ee75a21771dc /tools/testing/selftests/ftrace | |
| parent | ring_buffer: tracing: Inherit the tracing setting to next ring buffer (diff) | |
| download | wireguard-linux-82f4f3e69c5c29bce940dd87a2c0f16c51d48d17.tar.xz wireguard-linux-82f4f3e69c5c29bce940dd87a2c0f16c51d48d17.zip | |
selftests/ftrace: Add snapshot and tracing_on test case
Add a testcase for checking snapshot and tracing_on
relationship. This ensures that the snapshotting doesn't
affect current tracing on/off settings.
Link: http://lkml.kernel.org/r/153149932412.11274.15289227592627901488.stgit@devbox
Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
Cc: Hiraku Toyooka <hiraku.toyooka@cybertrust.co.jp>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: linux-kselftest@vger.kernel.org
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'tools/testing/selftests/ftrace')
| -rw-r--r-- | tools/testing/selftests/ftrace/test.d/00basic/snapshot.tc | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tools/testing/selftests/ftrace/test.d/00basic/snapshot.tc b/tools/testing/selftests/ftrace/test.d/00basic/snapshot.tc new file mode 100644 index 000000000000..3b1f45e13a2e --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/00basic/snapshot.tc @@ -0,0 +1,28 @@ +#!/bin/sh +# description: Snapshot and tracing setting +# flags: instance + +[ ! -f snapshot ] && exit_unsupported + +echo "Set tracing off" +echo 0 > tracing_on + +echo "Allocate and take a snapshot" +echo 1 > snapshot + +# Since trace buffer is empty, snapshot is also empty, but allocated +grep -q "Snapshot is allocated" snapshot + +echo "Ensure keep tracing off" +test `cat tracing_on` -eq 0 + +echo "Set tracing on" +echo 1 > tracing_on + +echo "Take a snapshot again" +echo 1 > snapshot + +echo "Ensure keep tracing on" +test `cat tracing_on` -eq 1 + +exit 0 |