xref: /aosp_15_r20/external/ltp/testcases/kernel/tracing/ftrace_test/ftrace_stress/ftrace_ftrace_enabled.sh (revision 49cdfc7efb34551c7342be41a7384b9c40d7cab7) 
1#! /bin/sh
2
3###############################################################################
4#                                                                             #
5# Copyright (c) 2010 FUJITSU LIMITED                                          #
6#                                                                             #
7# This program is free software; you can redistribute it and/or modify it     #
8# under the terms of the GNU General Public License as published by the Free  #
9# Software Foundation; either version 2 of the License, or (at your option)   #
10# any later version.                                                          #
11#                                                                             #
12# Author: Li Zefan <[email protected]>                                      #
13#                                                                             #
14###############################################################################
15
16MAX_LOOP=1500
17count=0
18
19while true; do
20	count=$(( $count + 1 ))
21	i=0
22	while [ $i -lt $MAX_LOOP ]; do
23		echo 0 > /proc/sys/kernel/ftrace_enabled
24		echo 1 > /proc/sys/kernel/ftrace_enabled
25		i=$((i + 1))
26	done
27
28	enable=$(( $count % 3 ))
29
30	if [ $enable -eq 0 ]; then
31		echo 1 > /proc/sys/kernel/ftrace_enabled
32	else
33		echo 0 > /proc/sys/kernel/ftrace_enabled
34	fi
35
36	sleep 1
37done
38
39