system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-11-05 18:23:50 +00:00
Code Issues Projects Releases Packages Wiki Activity

selftests/ftrace: Add ringbuffer size changing testcase

Browse source 
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>
This commit is contained in:
Masami Hiramatsu 2018-08-30 23:21:53 +09:00 committed by Shuah Khan (Samsung OSG)
parent 4d23e9b4fd
commit c21ceceae9
1 changed files with 22 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_size.tc Normal file
View file

@ -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