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From: Masami Hiramatsu <mhiramat@kernel.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>, Shuah Khan <shuah@kernel.org>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Tom Zanussi <tom.zanussi@linux.intel.com>,
	Hiraku Toyooka <hiraku.toyooka@cybertrust.co.jp>,
	linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: [PATCH 3/3] selftests/ftrace: Add snapshot and tracing_on test case
Date: Sat, 14 Jul 2018 01:28:44 +0900
Message-ID: <153149932412.11274.15289227592627901488.stgit@devbox> (raw)
In-Reply-To: <153149923649.11274.14970833360963898112.stgit@devbox>

Add a testcase for checking snapshot and tracing_on
relationship. This ensures that the snapshotting doesn't
affect current tracing on/off settings.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: linux-kselftest@vger.kernel.org
---
 .../selftests/ftrace/test.d/00basic/snapshot.tc    |   28 ++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 tools/testing/selftests/ftrace/test.d/00basic/snapshot.tc

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


      parent reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-13 16:27 [PATCH 0/3] tracing: Fix bugs on snapshot feature Masami Hiramatsu
2018-07-13 16:27 ` [PATCH 1/3] [BUGFIX] tracing: Fix double free of event_trigger_data Masami Hiramatsu
2018-07-24  2:10   ` Steven Rostedt
2018-07-24 15:09     ` Masami Hiramatsu
2018-07-24 20:49       ` Steven Rostedt
2018-07-24 21:30         ` Steven Rostedt
2018-07-24 23:13           ` Steven Rostedt
2018-07-25  1:16             ` Masami Hiramatsu
2018-07-25  2:41               ` Steven Rostedt
2018-07-25 14:14                 ` Masami Hiramatsu
2018-07-25 16:01           ` Tom Zanussi
2018-07-25 16:09             ` Steven Rostedt
2018-07-25  1:05         ` Masami Hiramatsu
2018-07-13 16:28 ` [PATCH 2/3] [BUGFIX] ring_buffer: tracing: Inherit the tracing setting to next ring buffer Masami Hiramatsu
2018-07-24  2:25   ` Steven Rostedt
2018-07-24 14:30     ` Masami Hiramatsu
2018-07-13 16:28 ` Masami Hiramatsu [this message]

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