164 lines
3.5 KiB
Bash
Executable File
164 lines
3.5 KiB
Bash
Executable File
#!/bin/sh
|
|
# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
|
|
# Copyright (c) 2019-2022 Petr Vorel <pvorel@suse.cz>
|
|
# Author: Alexey Kodanev <alexey.kodanev@oracle.com>
|
|
#
|
|
# Test creates several zram devices with different filesystems on them.
|
|
# It fills each device with zeros and checks that compression works.
|
|
|
|
TST_CNT=7
|
|
TST_TESTFUNC="do_test"
|
|
TST_NEEDS_CMDS="awk bc dd"
|
|
TST_SETUP="setup"
|
|
|
|
check_space_for_fs()
|
|
{
|
|
local fs="$1"
|
|
local ram_size
|
|
|
|
ram_size=$(awk '/MemTotal:/ {print $2}' /proc/meminfo)
|
|
if [ "$ram_size" -lt 1048576 ]; then
|
|
tst_res TINFO "not enough space for $fs"
|
|
return 1
|
|
fi
|
|
return 0
|
|
}
|
|
|
|
# List of parameters for zram devices.
|
|
# For each number the test creates own zram device.
|
|
# NOTE about size:
|
|
# 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.
|
|
initialize_vars()
|
|
{
|
|
local fs limit size stream=-1
|
|
dev_num=0
|
|
|
|
for fs in $(tst_supported_fs -s tmpfs); do
|
|
size="26214400"
|
|
limit="25M"
|
|
|
|
if [ "$fs" = "btrfs" -o "$fs" = "xfs" ]; then
|
|
check_space_for_fs "$fs" || continue
|
|
|
|
if [ "$fs" = "btrfs" ]; then
|
|
size="402653184"
|
|
elif [ "$fs" = "xfs" ]; then
|
|
size=314572800
|
|
fi
|
|
limit="$((size/1024/1024))M"
|
|
fi
|
|
|
|
stream=$((stream+3))
|
|
dev_num=$((dev_num+1))
|
|
zram_filesystems="$zram_filesystems $fs"
|
|
zram_mem_limits="$zram_mem_limits $limit"
|
|
zram_sizes="$zram_sizes $size"
|
|
zram_max_streams="$zram_max_streams $stream"
|
|
done
|
|
|
|
[ $dev_num -eq 0 ] && \
|
|
tst_brk TCONF "no suitable filesystem"
|
|
}
|
|
|
|
setup()
|
|
{
|
|
initialize_vars
|
|
zram_load
|
|
}
|
|
|
|
zram_makefs()
|
|
{
|
|
local i=$dev_start
|
|
local fs
|
|
|
|
for fs in $zram_filesystems; do
|
|
tst_res TINFO "make $fs filesystem on /dev/zram$i"
|
|
mkfs.$fs /dev/zram$i > err.log 2>&1
|
|
if [ $? -ne 0 ]; then
|
|
cat err.log
|
|
tst_brk TFAIL "failed to make $fs on /dev/zram$i"
|
|
fi
|
|
|
|
i=$(($i + 1))
|
|
done
|
|
|
|
tst_res TPASS "zram_makefs succeeded"
|
|
}
|
|
|
|
zram_mount()
|
|
{
|
|
local i
|
|
|
|
for i in $(seq $dev_start $dev_end); do
|
|
tst_res TINFO "mount /dev/zram$i"
|
|
mkdir zram$i
|
|
ROD mount /dev/zram$i zram$i
|
|
dev_mounted=$i
|
|
done
|
|
|
|
tst_res TPASS "mount of zram device(s) succeeded"
|
|
}
|
|
|
|
zram_fill_fs()
|
|
{
|
|
local mem_used_total
|
|
local b i r v
|
|
|
|
for i in $(seq $dev_start $dev_end); do
|
|
tst_res TINFO "filling zram$i (it can take long time)"
|
|
b=0
|
|
while true; do
|
|
dd conv=notrunc if=/dev/zero of=zram${i}/file \
|
|
oflag=append count=1 bs=1024 status=none \
|
|
>/dev/null 2>err.txt || break
|
|
b=$(($b + 1))
|
|
done
|
|
if [ $b -eq 0 ]; then
|
|
[ -s err.txt ] && tst_res TWARN "dd error: $(cat err.txt)"
|
|
tst_brk TBROK "cannot fill zram $i"
|
|
fi
|
|
tst_res TPASS "zram$i was filled with '$b' KB"
|
|
|
|
if [ ! -f "/sys/block/zram$i/mm_stat" ]; then
|
|
if [ $i -eq 0 ]; then
|
|
tst_res TCONF "zram compression ratio test requires zram mm_stat sysfs file"
|
|
fi
|
|
|
|
continue
|
|
fi
|
|
|
|
mem_used_total=`awk '{print $3}' "/sys/block/zram$i/mm_stat"`
|
|
v=$((100 * 1024 * $b / $mem_used_total))
|
|
r=`echo "scale=2; $v / 100 " | bc`
|
|
|
|
if [ "$v" -lt 100 ]; then
|
|
tst_res TFAIL "compression ratio: $r:1"
|
|
break
|
|
fi
|
|
|
|
tst_res TPASS "compression ratio: $r:1"
|
|
done
|
|
}
|
|
|
|
do_test()
|
|
{
|
|
case $1 in
|
|
1) zram_max_streams;;
|
|
2) zram_compress_alg;;
|
|
3) zram_set_disksizes;;
|
|
4) zram_set_memlimit;;
|
|
5) zram_makefs;;
|
|
6) zram_mount;;
|
|
7) zram_fill_fs;;
|
|
esac
|
|
}
|
|
|
|
. zram_lib.sh
|
|
tst_run
|