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jforbes pushed a commit to branch master
in repository kernel-tests.
commit 59821e8afb643d3413a85b081d8c3d509db29b7e
Author: Josh Boyer <jwboyer@xxxxxxxxxx>
Date: Wed Jun 13 14:04:25 2012 -0400
Add cachedrop test
Adapted from a similar test originally authored by Zhouping Liu
---
default/cachedrop/drop_caches.sh | 123 +++++++++++++++++++++++++++++++++++++++
default/cachedrop/runtest.sh | 16 +++++
2 files changed, 139 insertions(+)
diff --git a/default/cachedrop/drop_caches.sh b/default/cachedrop/drop_caches.sh
new file mode 100755
index 0000000..b6f0bf5
--- /dev/null
+++ b/default/cachedrop/drop_caches.sh
@@ -0,0 +1,123 @@
+#!/bin/sh
+
+# Copyright (c) 2011 Red Hat, Inc. All rights reserved. This copyrighted material
+# is made available to anyone wishing to use, modify, copy, or
+# redistribute it subject to the terms and conditions of the GNU General
+# Public License v.2.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE. See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# Author: Zhouping Liu <zliu@xxxxxxxxxx>
+
+TMP_FILE=`mktemp /tmp/drop_XXXXXX`
+TUNE_FILE=/proc/sys/vm/drop_caches
+
+function verify_tune_value()
+{
+ if [ $# -ne 2 ]; then
+ echo "Usage: verify_tune [TUNE_FILE] [TUNE_VALUE]"
+ exit -1;
+ fi
+
+ TUNE_FILE=$1
+ TUNE_VALUE=$2
+
+ TEST_TUNE=`cat ${TUNE_FILE}`
+ if [ ${TEST_TUNE} -ne ${TUNE_VALUE} ]; then
+ echo "TestError: Set value to ${TUNE_FILE} Failed"
+ exit -1
+ fi
+}
+
+function free_pagecache()
+{
+ dd if=/dev/zero of=${TMP_FILE} bs=1024k count=100 > /dev/null
+ sleep 1
+ original_cache=`vmstat | awk '{print $6}'| sed -n '3p'`
+
+ sync
+ echo 1 > ${TUNE_FILE}
+ verify_tune_value ${TUNE_FILE} 1
+
+ sleep 1
+ new_pagecache=`vmstat | awk '{print $6}'| sed -n '3p'`
+ if [ ${new_pagecache} -gt ${original_cache} ]; then
+ echo "TestError: Can't free pagecache"
+ echo "${new_cache} ${original_cache}"
+ exit -1
+ fi
+
+ rm -rf ${TMP_FILE}
+}
+
+function free_dentries_inodes()
+{
+ for X in `seq 1 20`; do
+ touch ${TMP_FILE}$X
+ echo "TEST" > ${TMP_FILE}$X
+ done
+ sleep 2
+ original_cache=`vmstat | awk '{print $6}'| sed -n '3p'`
+
+ sync
+ echo 2 > ${TUNE_FILE}
+ verify_tune_value ${TUNE_FILE} 2
+ sleep 2
+
+ new_cache=`vmstat | awk '{print $6}'| sed -n '3p'`
+ if [ ${new_cache} -gt ${original_cache} ]; then
+ echo "TestError: Can't free dentries and inodes"
+ echo "${new_cache} ${original_cache}"
+ exit -1
+ fi
+
+ rm -rf ${TMP_FILE}*
+}
+
+function free_pagecache_dentries_inodes()
+{
+ dd if=/dev/zero of=${TMP_FILE} bs=1024k count=10 > /dev/null
+ for X in `seq 1 10`; do
+ touch ${TMP_FILE}$X
+ echo "TEST" > ${TMP_FILE}$X
+ done
+ sleep 2
+
+ original_cache=`vmstat | awk '{print $6}'| sed -n '3p'`
+
+ sync
+ echo 3 > ${TUNE_FILE}
+ verify_tune_value ${TUNE_FILE} 3
+ sleep 1
+
+ new_cache=`vmstat | awk '{print $6}'| sed -n '3p'`
+ if [ ${new_cache} -gt ${original_cache} ]; then
+ echo "TestError: Can't free dentries and inodes and pagecache"
+ echo "${new_cache} ${original_cache}"
+ exit -1
+ fi
+
+ rm -rf ${TMP_FILE}*
+}
+
+function main()
+{
+ if ! [ -f ${TUNE_FILE} ]; then
+ echo "Could not locate ${TUNE_FILE}"
+ exit -1
+ fi
+
+ free_pagecache
+ free_dentries_inodes
+ free_pagecache_dentries_inodes
+
+ echo "TestPASS: ${TUNE_FILE} PASS"
+}
+
+main
diff --git a/default/cachedrop/runtest.sh b/default/cachedrop/runtest.sh
new file mode 100755
index 0000000..e565dea
--- /dev/null
+++ b/default/cachedrop/runtest.sh
@@ -0,0 +1,16 @@
+#!/bin/sh
+
+source ../../utils/root-check.sh
+
+check_root
+is_root=$?
+if [ "$is_root" -ne "0" ]; then
+ exit 3
+fi
+
+# Run
+./drop_caches.sh
+if [ "$?" -ne "0" ]; then
+ echo "Could not run tests"
+ exit -1
+fi
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