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From: Masami Hiramatsu <mhiramat@kernel.org>
To: Shuah Khan <shuah@kernel.org>, Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 21/25] selftests/ftrace: Add ringbuffer size changing testcase
Date: Fri, 27 Jul 2018 21:19:51 +0900	[thread overview]
Message-ID: <153269399108.3084.13255857156285716199.stgit@devbox> (raw)
In-Reply-To: <153269339575.3084.16279591141931053689.stgit@devbox>

Add a testcase for changing ringbuffer size. This tests
not only ringbuffer size but also tests the imbalance
per-cpu buffer size change too.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
 .../ftrace/test.d/00basic/ringbuffer_size.tc       |   21 ++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_size.tc

diff --git a/tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_size.tc b/tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_size.tc
new file mode 100644
index 000000000000..9224f33b3194
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_size.tc
@@ -0,0 +1,21 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Change the ringbuffer size
+
+rb_size_test() {
+ORIG=`cat buffer_size_kb`
+
+expr $ORIG / 2 > buffer_size_kb
+
+expr $ORIG \* 2 > buffer_size_kb
+
+echo $ORIG > buffer_size_kb
+}
+
+rb_size_test
+
+: "If per-cpu buffer is supported, imbalance it"
+if [ -d per_cpu/cpu0 ]; then
+  cd per_cpu/cpu0
+  rb_size_test
+fi


  parent reply	other threads:[~2018-07-27 12:20 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-27 12:09 [PATCH 00/25] selftests/ftrace: Improve ftracetest with coverage check Masami Hiramatsu
2018-07-27 12:10 ` [PATCH 01/25] tracing: Allow gcov profiling on only ftrace subsystem Masami Hiramatsu
2018-07-27 12:10 ` [PATCH 02/25] selftests/ftrace: Add --stop-fail hidden option for debug Masami Hiramatsu
2018-07-27 12:11 ` [PATCH 03/25] selftests/ftrace: Add --console hidden option Masami Hiramatsu
2018-07-27 12:11 ` [PATCH 04/25] selftests/ftrace: Add case number prefix to logfile Masami Hiramatsu
2018-07-27 12:12 ` [PATCH 05/25] selftests/ftrace: More initialize features in initialize_ftrace Masami Hiramatsu
2018-07-27 12:12 ` [PATCH 06/25] selftests/ftrace: Cleanup ftrace after running test Masami Hiramatsu
2018-07-27 12:13 ` [PATCH 07/25] selftests/ftrace: Remove unneeded per-test init/cleanup ftrace Masami Hiramatsu
2018-07-27 12:13 ` [PATCH 08/25] selftests/ftrace: Fix to test kprobe $comm arg only if available Masami Hiramatsu
2018-07-27 12:14 ` [PATCH 09/25] selftests/ftrace: Fix checkbashisms errors Masami Hiramatsu
2018-07-27 12:14 ` [PATCH 10/25] selftests/ftrace: Use loopback address instead of localhost Masami Hiramatsu
2018-07-27 12:15 ` [PATCH 11/25] selftests/ftrace: Improve kprobe on module testcase to load/unload module Masami Hiramatsu
2018-08-02  1:02   ` Masami Hiramatsu
2018-08-02  7:22     ` Masami Hiramatsu
2018-07-27 12:15 ` [PATCH 12/25] selftests/ftrace: Improve kprobe testcase to check log data Masami Hiramatsu
2018-07-27 12:16 ` [PATCH 13/25] selftests/ftrace: Improve kretprobe " Masami Hiramatsu
2018-07-27 12:16 ` [PATCH 14/25] selftests/ftrace: Test kprobe-event argument with various bitsize Masami Hiramatsu
2018-07-27 12:17 ` [PATCH 15/25] selftests/ftrace: Check set_event_pid result Masami Hiramatsu
2018-07-27 12:17 ` [PATCH 16/25] selftests/ftrace: Add kprobe event with $comm argument testcase Masami Hiramatsu
2018-07-27 12:17 ` [PATCH 17/25] selftests/ftrace: Add kprobe profile testcase Masami Hiramatsu
2018-07-27 12:18 ` [PATCH 18/25] selftests/ftrace: Add a testcase for nop tracer Masami Hiramatsu
2018-07-27 12:18 ` [PATCH 19/25] selftests/ftrace: Add kprobe-event with symbol argument test Masami Hiramatsu
2018-07-27 12:19 ` [PATCH 20/25] selftests/ftrace: Add trace_printk sample module test Masami Hiramatsu
2018-07-27 12:19 ` Masami Hiramatsu [this message]
2018-07-27 12:20 ` [PATCH 22/25] selftests/ftrace: Add function profiling stat testcase Masami Hiramatsu
2018-07-27 12:20 ` [PATCH 23/25] selftests/ftrace: Add max stack tracer testcase Masami Hiramatsu
2018-08-03  5:24   ` Masami Hiramatsu
2018-07-27 12:21 ` [PATCH 24/25] selftests/ftrace: Add function filter on module testcase Masami Hiramatsu
2018-07-27 12:21 ` [PATCH 25/25] selftests/ftrace: Add trace_pipe testcase Masami Hiramatsu

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