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- #!/bin/bash
- # usage ./functions.sh
- #################################################################################
- # Copyright (c) International Business Machines Corp., 2008 #
- # #
- # 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 #
- # #
- #################################################################################
- # Name Of File: myfunctions.sh #
- # #
- # Description: This file has functions for the setup for testing memory #
- # controller. setup includes creating controller device, #
- # mounting it with cgroup filesystem with option memory and #
- # creating groups in it. #
- # #
- # Functions: setup(): creaes /dev/memctl, mounts cgroup fs on it, creates #
- # groups in that etc. #
- # setmemlimits(): Sets up memory limits for different groups #
- # usage(): Shows the usage of this file. #
- # cleanup(): Does full system cleanup #
- # #
- # Author: Sudhir Kumar <skumar@linux.vnet.ibm.com> #
- # #
- # History: #
- # #
- # DATE NAME EMAIL DESC #
- # #
- # 15/03/08 Sudhir Kumar <skumar@linux.vnet.ibm.com> Created this test #
- # #
- #################################################################################
- # Write the cleanup function
- cleanup ()
- {
- echo "Cleanup called";
- rm -f memctl_task_* 2>/dev/null
- rmdir /dev/memctl/group* 2> /dev/null
- umount /dev/memctl 2> /dev/null
- rmdir /dev/memctl 2> /dev/null
- }
- # Create /dev/memctl & mount the cgroup file system with memory controller
- #clean any group created eralier (if any)
- setup ()
- {
- if [ -e /dev/memctl ]
- then
- echo "WARN:/dev/memctl already exist..overwriting";
- cleanup;
- mkdir /dev/memctl;
- else
- mkdir /dev/memctl
- fi
- mount -t cgroup -omemory cgroup /dev/memctl 2> /dev/null
- if [ $? -ne 0 ]
- then
- echo "ERROR: Could not mount cgroup filesystem on /dev/memctl..Exiting test";
- cleanup;
- exit -1;
- fi
- # Group created earlier may again be visible if not cleaned properly...so clean them
- if [ -e /dev/memctl/group_1 ]
- then
- rmdir /dev/memctl/group*
- echo "WARN: Earlier groups found and removed...";
- fi
- # Create different groups
- for i in $(seq 1 $NUM_GROUPS)
- do
- group=group_$i;
- mkdir /dev/memctl/$group;# 2>/dev/null
- if [ $? -ne 0 ]
- then
- echo "ERROR: Can't create $group...Check your permissions..Exiting test";
- cleanup;
- exit -1;
- fi
- done
- }
- # The usage of the script file
- usage()
- {
- echo "Could not start memory controller test";
- echo "usage: run_memctl_test.sh test_num";
- echo "Skipping the memory controller test...";
- }
- # Function to set memory limits for different groups
- setmemlimits()
- {
- for i in $(seq 1 $NUM_GROUPS)
- do
- limit=MEMLIMIT_GROUP_${i};
- eval limit=\$$limit;
- echo -n $limit >/dev/memctl/group_$i/memory.limit_in_bytes;
- if [ $? -ne 0 ]
- then
- echo "Error in setting the memory limits for group_$i"
- cleanup;
- exit -1;
- fi;
- done
- }
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