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| author |   Masami Hiramatsu <mhiramat@kernel.org> | 2018-08-30 23:21:53 +0900 |
|---|---|---|
| committer |   Shuah Khan (Samsung OSG) <shuah@kernel.org> | 2018-10-24 14:49:36 -0600 |
| commit | c21ceceae94dc22f5b42c8174efa4597a0c990de (patch) | |
| tree | 6a1e29a8f20770b7b664ea51a4864ef3cdc3885c /tools/testing/selftests/ftrace | |
| parent | selftests/ftrace: Add trace_printk sample module test (diff) | |
| download | linux-dev-c21ceceae94dc22f5b42c8174efa4597a0c990de.tar.xz linux-dev-c21ceceae94dc22f5b42c8174efa4597a0c990de.zip | |
selftests/ftrace: Add ringbuffer size changing testcase
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>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
Diffstat (limited to 'tools/testing/selftests/ftrace')
| -rw-r--r-- | tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_size.tc | 22 |
1 files changed, 22 insertions, 0 deletions
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..ab70f0077c35 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_size.tc @@ -0,0 +1,22 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Change the ringbuffer size +# flags: instance + +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 |