WIP FPC-III support
[linux/fpc-iii.git] / tools / testing / selftests / zram / zram01.sh
blob114863d9fb8768c906732d7ce780e3f6ea73e44c
1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0-or-later
3 # Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
5 # Test creates several zram devices with different filesystems on them.
6 # It fills each device with zeros and checks that compression works.
8 # Author: Alexey Kodanev <alexey.kodanev@oracle.com>
9 # Modified: Naresh Kamboju <naresh.kamboju@linaro.org>
11 TCID="zram01"
12 ERR_CODE=0
14 . ./zram_lib.sh
16 # Test will create the following number of zram devices:
17 dev_num=1
18 # This is a list of parameters for zram devices.
19 # Number of items must be equal to 'dev_num' parameter.
20 zram_max_streams="2"
22 # The zram sysfs node 'disksize' value can be either in bytes,
23 # or you can use mem suffixes. But in some old kernels, mem
24 # suffixes are not supported, for example, in RHEL6.6GA's kernel
25 # layer, it uses strict_strtoull() to parse disksize which does
26 # not support mem suffixes, in some newer kernels, they use
27 # memparse() which supports mem suffixes. So here we just use
28 # bytes to make sure everything works correctly.
29 zram_sizes="2097152" # 2MB
30 zram_mem_limits="2M"
31 zram_filesystems="ext4"
32 zram_algs="lzo"
34 zram_fill_fs()
36 local mem_free0=$(free -m | awk 'NR==2 {print $4}')
38 for i in $(seq 0 $(($dev_num - 1))); do
39 echo "fill zram$i..."
40 local b=0
41 while [ true ]; do
42 dd conv=notrunc if=/dev/zero of=zram${i}/file \
43 oflag=append count=1 bs=1024 status=none \
44 > /dev/null 2>&1 || break
45 b=$(($b + 1))
46 done
47 echo "zram$i can be filled with '$b' KB"
48 done
50 local mem_free1=$(free -m | awk 'NR==2 {print $4}')
51 local used_mem=$(($mem_free0 - $mem_free1))
53 local total_size=0
54 for sm in $zram_sizes; do
55 local s=$(echo $sm | sed 's/M//')
56 total_size=$(($total_size + $s))
57 done
59 echo "zram used ${used_mem}M, zram disk sizes ${total_size}M"
61 local v=$((100 * $total_size / $used_mem))
63 if [ "$v" -lt 100 ]; then
64 echo "FAIL compression ratio: 0.$v:1"
65 ERR_CODE=-1
66 zram_cleanup
67 return
70 echo "zram compression ratio: $(echo "scale=2; $v / 100 " | bc):1: OK"
73 check_prereqs
74 zram_load
75 zram_max_streams
76 zram_compress_alg
77 zram_set_disksizes
78 zram_set_memlimit
79 zram_makefs
80 zram_mount
82 zram_fill_fs
83 zram_cleanup
84 zram_unload
86 if [ $ERR_CODE -ne 0 ]; then
87 echo "$TCID : [FAIL]"
88 else
89 echo "$TCID : [PASS]"