Commit c21cecea authored Aug 30, 2018 by Masami Hiramatsu Committed by Shuah Khan (Samsung OSG) Oct 24, 2018

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>

parent 4d23e9b4

tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_size.tc

0 → 100644

+22 −0

Original line number	Diff line number	Diff line
		#!/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

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