controllers/cpuacct: rewrote testcases

testcases/kernel/controllers/cpuacct/cpuacct.sh new file +49 -0

@@ -0,0 +1,221 @@
+#!/bin/bash
+
+################################################################################
+##                                                                            ##
+## Copyright (c) 2015 SUSE                                                    ##
+##                                                                            ##
+## This program is free software;  you can redistribute it and#or modify      ##
+## it under the terms of the GNU General Public License as published by       ##
+## the Free Software Foundation; either version 2 of the License, or          ##
+## (at your option) any later version.                                        ##
+##                                                                            ##
+## 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: Cedric Hnyda <[email protected]>                                     ##
+##                                                                            ##
+################################################################################
+
+# Usage
+# ./cpuacct.sh nbsubgroup nbprocess
+#
+# 1) nbsubgroup : number of subgroup to create
+# 2) nbprocess : number of process to attach to each subgroup
+#
+# Description
+#
+# 1) Find if cpuacct is mounted, if not mounted, cpuacct will be mounted
+# 2) Create a subgroup ltp_test in cpuacct
+# 3) Create nbsubgroup subgroup in ltp_test and attach them nbprocess process
+# 4) Check that every subgroup's tasks file is not empty (test1)
+# 5) Kill all created process
+# 6) Check that ltp_test/subgroup*/cpuacct.usage != 0 (test2)
+# 7) Check that sum ltp_test/subgroup*/cpuacct.usage = ltp_test/cpuacct.usage
+# (test3)
+# 8) cleanup
+
+
+mounted=1
+mount_point=""
+max=$1
+nbprocess=$2
+

testcases/kernel/controllers/cpuacct/cpuacct.sh new file +9 -0

+	if [ "$mounted" -eq "0" ]; then
+		do_mkdir $mount_point
+		mount_cpuacct
+	fi
+	do_mkdir $testpath
+	for i in `seq 1 $max`
+	do
+		do_mkdir $testpath/subgroup_$i
+	done

testcases/kernel/controllers/cpuacct/cpuacct.sh new file +5 -0

+}
+
+cleanup()
+{
+	tst_resm TINFO "removing created directories"

testcases/kernel/controllers/cpuacct/cpuacct.sh new file +9 -0

+setup;
+
+error=0
+tst_resm TINFO "killing created process"
+for j in `seq 1 $max`
+do
+	cat $testpath/subgroup_$j/tasks > $TMPFILE
+	nlines=`cat $TMPFILE | wc -l`
+	if [ "$nlines" -eq "0" ]; then

testcases/kernel/controllers/cpuacct/cpuacct.sh new file +8 -0

+## check that every subgroup has at least one process in tasks file
+if [ "$error" -eq "1" ]; then
+	tst_resm TFAIL "Some subgroup didn't have any pid in their tasks file"
+else
+	tst_resm TPASS "subgroups' tasks files are not empty"
+fi
+
+acc=0

testcases/kernel/controllers/cpuacct/cpuacct_task.sh new file +9 -0

new file mode 100755
index 0000000..54a9d65
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+################################################################################
+##                                                                            ##
+## Copyright (c) 2015 SUSE                                                    ##
+##                                                                            ##
+## This program is free software;  you can redistribute it and#or modify      ##
+## it under the terms of the GNU General Public License as published by       ##
+## the Free Software Foundation; either version 2 of the License, or          ##

testcases/kernel/controllers/cpuacct/cpuacct_task.sh new file +11 -0

+##                                                                            ##
+## Author: Cedric Hnyda <[email protected]>                                     ##
+##                                                                            ##
+################################################################################
+
+echo $$ > $1
+i=0
+while :
+do
+	i=$i
+done

testcases/kernel/controllers/cpuacct/cpuacct.sh line 86

Quoted 7 lines

testcases/kernel/controllers/cpuacct/cpuacct.sh new file +7 -0

+	fi
+}
+
+mount_cpuacct()
+{
+	mount -t cgroup -o cpuacct none $mount_point
+	verify_result $? 0 "Error occured while mounting cgroup"

Interesting idea. Maybe we should add such function to the test.sh library. Something that would call tst_brkm on non zero $?. Something as:

mount -t cgroup -o cpuacct none $mount_point tst_brkm_err TCONF "Failed to mount cgroup $mount_point"

and the test.sh would have:

tst_brkm_err()

{
	if [ $? -ne 0 ]; then
		tst_brkm $@
	fi
}

testcases/kernel/controllers/cpuacct/cpuacct.sh line 208

Quoted 7 lines

testcases/kernel/controllers/cpuacct/cpuacct.sh new file +7 -0

+## check that cpuacct.usage != 0 for every subgroup
+((TST_COUNT = TST_COUNT + 1))
+if [ "$error" -eq "1" ]; then
+	tst_resm TFAIL "cpuacct.usage should not be equal to 0"
+else
+	tst_resm TPASS "cpuacct.usage is not equal to 0 for every subgroup"
+fi

I'm not 100% sure that this assertion will always hold. I will have to look into this.