summaryrefslogtreecommitdiff
path: root/tools
diff options
context:
space:
mode:
authorMasami Hiramatsu <mhiramat@kernel.org>2018-07-14 01:28:44 +0900
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2018-07-25 10:29:42 -0400
commit82f4f3e69c5c29bce940dd87a2c0f16c51d48d17 (patch)
tree1bf77c0ee17dfb017ee32b09c341ee75a21771dc /tools
parent73c8d8945505acdcbae137c2e00a1232e0be709f (diff)
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')
-rw-r--r--tools/testing/selftests/ftrace/test.d/00basic/snapshot.tc28
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