#!/bin/bash # Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved. # # 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 would 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. # # Test creates several zram devices with different filesystems on them. # It fills each device with zeros and checks that compression works. # # Author: Alexey Kodanev # Modified: Naresh Kamboju TCID="zram01" ERR_CODE=0 . ./zram_lib.sh # Test will create the following number of zram devices: dev_num=1 # This is a list of parameters for zram devices. # Number of items must be equal to 'dev_num' parameter. zram_max_streams="2" # The zram sysfs node 'disksize' value can be either in bytes, # or you can use mem suffixes. But in some old kernels, mem # suffixes are not supported, for example, in RHEL6.6GA's kernel # layer, it uses strict_strtoull() to parse disksize which does # not support mem suffixes, in some newer kernels, they use # memparse() which supports mem suffixes. So here we just use # bytes to make sure everything works correctly. zram_sizes="2097152" # 2MB zram_mem_limits="2M" zram_filesystems="ext4" zram_algs="lzo" zram_fill_fs() { local mem_free0=$(free -m | awk 'NR==2 {print $4}') for i in $(seq 0 $(($dev_num - 1))); do echo "fill zram$i..." local b=0 while [ true ]; do dd conv=notrunc if=/dev/zero of=zram${i}/file \ oflag=append count=1 bs=1024 status=none \ > /dev/null 2>&1 || break b=$(($b + 1)) done echo "zram$i can be filled with '$b' KB" done local mem_free1=$(free -m | awk 'NR==2 {print $4}') local used_mem=$(($mem_free0 - $mem_free1)) local total_size=0 for sm in $zram_sizes; do local s=$(echo $sm | sed 's/M//') total_size=$(($total_size + $s)) done echo "zram used ${used_mem}M, zram disk sizes ${total_size}M" local v=$((100 * $total_size / $used_mem)) if [ "$v" -lt 100 ]; then echo "FAIL compression ratio: 0.$v:1" ERR_CODE=-1 zram_cleanup return fi echo "zram compression ratio: $(echo "scale=2; $v / 100 " | bc):1: OK" } check_prereqs zram_load zram_max_streams zram_compress_alg zram_set_disksizes zram_set_memlimit zram_makefs zram_mount zram_fill_fs zram_cleanup zram_unload if [ $ERR_CODE -ne 0 ]; then echo "$TCID : [FAIL]" else echo "$TCID : [PASS]" fi tion value='range'>range

path: root/kernel/configs

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