selftests/zram: Adding zram tests
zram: Compressed RAM based block devices ---------------------------------------- The zram module creates RAM based block devices named /dev/zram<id> (<id> = 0, 1, ...). Pages written to these disks are compressed and stored in memory itself. These disks allow very fast I/O and compression provides good amounts of memory savings. Some of the usecases include /tmp storage, use as swap disks, various caches under /var and maybe many more :) Statistics for individual zram devices are exported through sysfs nodes at /sys/block/zram<id>/ This patch is to validate the zram functionality. Test interacts with block device /dev/zram<id> and sysfs nodes /sys/block/zram<id>/ zram.sh: sanity check of CONFIG_ZRAM and to run zram01 and zram02 tests zram01.sh: creates general purpose ram disks with different filesystems zram02.sh: creates block device for swap zram_lib.sh: create library with initialization/cleanup functions README: ZRAM introduction and Kconfig required. Makefile: To run zram tests zram test output ----------------- ./zram.sh -------------------- running zram tests -------------------- /dev/zram0 device file found: OK set max_comp_streams to zram device(s) /sys/block/zram0/max_comp_streams = '2' (1/1) zram max streams: OK test that we can set compression algorithm supported algs: [lzo] lz4 /sys/block/zram0/comp_algorithm = 'lzo' (1/1) zram set compression algorithm: OK set disk size to zram device(s) /sys/block/zram0/disksize = '2097152' (1/1) zram set disksizes: OK set memory limit to zram device(s) /sys/block/zram0/mem_limit = '2M' (1/1) zram set memory limit: OK make ext4 filesystem on /dev/zram0 zram mkfs.ext4: OK mount /dev/zram0 zram mount of zram device(s): OK fill zram0... zram0 can be filled with '1932' KB zram used 3M, zram disk sizes 2097152M zram compression ratio: 699050.66:1: OK zram cleanup zram01 : [PASS] /dev/zram0 device file found: OK set max_comp_streams to zram device(s) /sys/block/zram0/max_comp_streams = '2' (1/1) zram max streams: OK set disk size to zram device(s) /sys/block/zram0/disksize = '1048576' (1/1) zram set disksizes: OK set memory limit to zram device(s) /sys/block/zram0/mem_limit = '1M' (1/1) zram set memory limit: OK make swap with zram device(s) done with /dev/zram0 zram making zram mkswap and swapon: OK zram swapoff: OK zram cleanup zram02 : [PASS] CC: Shuah Khan <shuahkh@osg.samsung.com> CC: Tyler Baker <tyler.baker@linaro.org> CC: Milosz Wasilewski <milosz.wasilewski@linaro.org> CC: Alexey Kodanev <alexey.kodanev@oracle.com> Signed-off-by: Naresh Kamboju <naresh.kamboju@linaro.org> Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com> Reviewed-By: Tyler Baker <tyler.baker@linaro.org> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
This commit is contained in:
Naresh Kamboju
Shuah Khan
parent
d770e558e2
commit
f21fb798fe
|
|
@ -22,6 +22,7 @@ endif
|
|||
TARGETS += user
|
||||
TARGETS += vm
|
||||
TARGETS += x86
|
||||
TARGETS += zram
|
||||
#Please keep the TARGETS list alphabetically sorted
|
||||
# Run "make quicktest=1 run_tests" or
|
||||
# "make quicktest=1 kselftest from top level Makefile
|
||||
|
|
|
|||
|
|
@ -0,0 +1,12 @@
|
|||
all:
|
||||
|
||||
TEST_PROGS := zram.sh
|
||||
TEST_FILES := zram01.sh zram02.sh zram_lib.sh
|
||||
|
||||
include ../lib.mk
|
||||
|
||||
run_tests:
|
||||
@/bin/bash ./zram.sh
|
||||
|
||||
clean:
|
||||
$(RM) err.log
|
||||
|
|
@ -0,0 +1,40 @@
|
|||
zram: Compressed RAM based block devices
|
||||
----------------------------------------
|
||||
* Introduction
|
||||
|
||||
The zram module creates RAM based block devices named /dev/zram<id>
|
||||
(<id> = 0, 1, ...). Pages written to these disks are compressed and stored
|
||||
in memory itself. These disks allow very fast I/O and compression provides
|
||||
good amounts of memory savings. Some of the usecases include /tmp storage,
|
||||
use as swap disks, various caches under /var and maybe many more :)
|
||||
|
||||
Statistics for individual zram devices are exported through sysfs nodes at
|
||||
/sys/block/zram<id>/
|
||||
|
||||
Kconfig required:
|
||||
CONFIG_ZRAM=y
|
||||
CONFIG_ZRAM_LZ4_COMPRESS=y
|
||||
CONFIG_ZPOOL=y
|
||||
CONFIG_ZSMALLOC=y
|
||||
|
||||
ZRAM Testcases
|
||||
--------------
|
||||
zram_lib.sh: create library with initialization/cleanup functions
|
||||
zram.sh: For sanity check of CONFIG_ZRAM and to run zram01 and zram02
|
||||
|
||||
Two functional tests: zram01 and zram02:
|
||||
zram01.sh: creates general purpose ram disks with ext4 filesystems
|
||||
zram02.sh: creates block device for swap
|
||||
|
||||
Commands required for testing:
|
||||
- bc
|
||||
- dd
|
||||
- free
|
||||
- awk
|
||||
- mkswap
|
||||
- swapon
|
||||
- swapoff
|
||||
- mkfs/ mkfs.ext4
|
||||
|
||||
For more information please refer:
|
||||
kernel-source-tree/Documentation/blockdev/zram.txt
|
||||
|
|
@ -0,0 +1,23 @@
|
|||
#!/bin/bash
|
||||
TCID="zram.sh"
|
||||
|
||||
run_zram () {
|
||||
echo "--------------------"
|
||||
echo "running zram tests"
|
||||
echo "--------------------"
|
||||
./zram01.sh
|
||||
echo ""
|
||||
./zram02.sh
|
||||
}
|
||||
|
||||
# check zram module exists
|
||||
MODULE_PATH=/lib/modules/`uname -r`/kernel/drivers/block/zram/zram.ko
|
||||
if [ -f $MODULE_PATH ]; then
|
||||
run_zram
|
||||
elif [ -b /dev/zram0 ]; then
|
||||
run_zram
|
||||
else
|
||||
echo "$TCID : No zram.ko module or /dev/zram0 device file not found"
|
||||
echo "$TCID : CONFIG_ZRAM is not set"
|
||||
exit 1
|
||||
fi
|
||||
|
|
@ -0,0 +1,98 @@
|
|||
#!/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 <alexey.kodanev@oracle.com>
|
||||
# Modified: Naresh Kamboju <naresh.kamboju@linaro.org>
|
||||
|
||||
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"
|
||||
}
|
||||
|
||||
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
|
||||
|
|
@ -0,0 +1,53 @@
|
|||
#!/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 checks that we can create swap zram device.
|
||||
#
|
||||
# Author: Alexey Kodanev <alexey.kodanev@oracle.com>
|
||||
# Modified: Naresh Kamboju <naresh.kamboju@linaro.org>
|
||||
|
||||
TCID="zram02"
|
||||
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="1048576" # 1M
|
||||
zram_mem_limits="1M"
|
||||
|
||||
zram_load
|
||||
zram_max_streams
|
||||
zram_set_disksizes
|
||||
zram_set_memlimit
|
||||
zram_makeswap
|
||||
zram_swapoff
|
||||
zram_cleanup
|
||||
zram_unload
|
||||
|
||||
if [ $ERR_CODE -ne 0 ]; then
|
||||
echo "$TCID : [FAIL]"
|
||||
else
|
||||
echo "$TCID : [PASS]"
|
||||
fi
|
||||
|
|
@ -0,0 +1,222 @@
|
|||
#!/bin/sh
|
||||
# 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.
|
||||
#
|
||||
# Author: Alexey Kodanev <alexey.kodanev@oracle.com>
|
||||
# Modified: Naresh Kamboju <naresh.kamboju@linaro.org>
|
||||
|
||||
MODULE=0
|
||||
dev_makeswap=-1
|
||||
dev_mounted=-1
|
||||
|
||||
trap INT
|
||||
|
||||
zram_cleanup()
|
||||
{
|
||||
echo "zram cleanup"
|
||||
local i=
|
||||
for i in $(seq 0 $dev_makeswap); do
|
||||
swapoff /dev/zram$i
|
||||
done
|
||||
|
||||
for i in $(seq 0 $dev_mounted); do
|
||||
umount /dev/zram$i
|
||||
done
|
||||
|
||||
for i in $(seq 0 $(($dev_num - 1))); do
|
||||
echo 1 > /sys/block/zram${i}/reset
|
||||
rm -rf zram$i
|
||||
done
|
||||
|
||||
}
|
||||
|
||||
zram_unload()
|
||||
{
|
||||
if [ $MODULE -ne 0 ] ; then
|
||||
echo "zram rmmod zram"
|
||||
rmmod zram > /dev/null 2>&1
|
||||
fi
|
||||
}
|
||||
|
||||
zram_load()
|
||||
{
|
||||
# check zram module exists
|
||||
MODULE_PATH=/lib/modules/`uname -r`/kernel/drivers/block/zram/zram.ko
|
||||
if [ -f $MODULE_PATH ]; then
|
||||
MODULE=1
|
||||
echo "create '$dev_num' zram device(s)"
|
||||
modprobe zram num_devices=$dev_num
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "failed to insert zram module"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
dev_num_created=$(ls /dev/zram* | wc -w)
|
||||
|
||||
if [ "$dev_num_created" -ne "$dev_num" ]; then
|
||||
echo "unexpected num of devices: $dev_num_created"
|
||||
ERR_CODE=-1
|
||||
else
|
||||
echo "zram load module successful"
|
||||
fi
|
||||
elif [ -b /dev/zram0 ]; then
|
||||
echo "/dev/zram0 device file found: OK"
|
||||
else
|
||||
echo "ERROR: No zram.ko module or no /dev/zram0 device found"
|
||||
echo "$TCID : CONFIG_ZRAM is not set"
|
||||
exit 1
|
||||
fi
|
||||
}
|
||||
|
||||
zram_max_streams()
|
||||
{
|
||||
echo "set max_comp_streams to zram device(s)"
|
||||
|
||||
local i=0
|
||||
for max_s in $zram_max_streams; do
|
||||
local sys_path="/sys/block/zram${i}/max_comp_streams"
|
||||
echo $max_s > $sys_path || \
|
||||
echo "FAIL failed to set '$max_s' to $sys_path"
|
||||
sleep 1
|
||||
local max_streams=$(cat $sys_path)
|
||||
|
||||
[ "$max_s" -ne "$max_streams" ] && \
|
||||
echo "FAIL can't set max_streams '$max_s', get $max_stream"
|
||||
|
||||
i=$(($i + 1))
|
||||
echo "$sys_path = '$max_streams' ($i/$dev_num)"
|
||||
done
|
||||
|
||||
echo "zram max streams: OK"
|
||||
}
|
||||
|
||||
zram_compress_alg()
|
||||
{
|
||||
echo "test that we can set compression algorithm"
|
||||
|
||||
local algs=$(cat /sys/block/zram0/comp_algorithm)
|
||||
echo "supported algs: $algs"
|
||||
local i=0
|
||||
for alg in $zram_algs; do
|
||||
local sys_path="/sys/block/zram${i}/comp_algorithm"
|
||||
echo "$alg" > $sys_path || \
|
||||
echo "FAIL can't set '$alg' to $sys_path"
|
||||
i=$(($i + 1))
|
||||
echo "$sys_path = '$alg' ($i/$dev_num)"
|
||||
done
|
||||
|
||||
echo "zram set compression algorithm: OK"
|
||||
}
|
||||
|
||||
zram_set_disksizes()
|
||||
{
|
||||
echo "set disk size to zram device(s)"
|
||||
local i=0
|
||||
for ds in $zram_sizes; do
|
||||
local sys_path="/sys/block/zram${i}/disksize"
|
||||
echo "$ds" > $sys_path || \
|
||||
echo "FAIL can't set '$ds' to $sys_path"
|
||||
|
||||
i=$(($i + 1))
|
||||
echo "$sys_path = '$ds' ($i/$dev_num)"
|
||||
done
|
||||
|
||||
echo "zram set disksizes: OK"
|
||||
}
|
||||
|
||||
zram_set_memlimit()
|
||||
{
|
||||
echo "set memory limit to zram device(s)"
|
||||
|
||||
local i=0
|
||||
for ds in $zram_mem_limits; do
|
||||
local sys_path="/sys/block/zram${i}/mem_limit"
|
||||
echo "$ds" > $sys_path || \
|
||||
echo "FAIL can't set '$ds' to $sys_path"
|
||||
|
||||
i=$(($i + 1))
|
||||
echo "$sys_path = '$ds' ($i/$dev_num)"
|
||||
done
|
||||
|
||||
echo "zram set memory limit: OK"
|
||||
}
|
||||
|
||||
zram_makeswap()
|
||||
{
|
||||
echo "make swap with zram device(s)"
|
||||
local i=0
|
||||
for i in $(seq 0 $(($dev_num - 1))); do
|
||||
mkswap /dev/zram$i > err.log 2>&1
|
||||
if [ $? -ne 0 ]; then
|
||||
cat err.log
|
||||
echo "FAIL mkswap /dev/zram$1 failed"
|
||||
fi
|
||||
|
||||
swapon /dev/zram$i > err.log 2>&1
|
||||
if [ $? -ne 0 ]; then
|
||||
cat err.log
|
||||
echo "FAIL swapon /dev/zram$1 failed"
|
||||
fi
|
||||
|
||||
echo "done with /dev/zram$i"
|
||||
dev_makeswap=$i
|
||||
done
|
||||
|
||||
echo "zram making zram mkswap and swapon: OK"
|
||||
}
|
||||
|
||||
zram_swapoff()
|
||||
{
|
||||
local i=
|
||||
for i in $(seq 0 $dev_makeswap); do
|
||||
swapoff /dev/zram$i > err.log 2>&1
|
||||
if [ $? -ne 0 ]; then
|
||||
cat err.log
|
||||
echo "FAIL swapoff /dev/zram$i failed"
|
||||
fi
|
||||
done
|
||||
dev_makeswap=-1
|
||||
|
||||
echo "zram swapoff: OK"
|
||||
}
|
||||
|
||||
zram_makefs()
|
||||
{
|
||||
local i=0
|
||||
for fs in $zram_filesystems; do
|
||||
# if requested fs not supported default it to ext2
|
||||
which mkfs.$fs > /dev/null 2>&1 || fs=ext2
|
||||
|
||||
echo "make $fs filesystem on /dev/zram$i"
|
||||
mkfs.$fs /dev/zram$i > err.log 2>&1
|
||||
if [ $? -ne 0 ]; then
|
||||
cat err.log
|
||||
echo "FAIL failed to make $fs on /dev/zram$i"
|
||||
fi
|
||||
i=$(($i + 1))
|
||||
echo "zram mkfs.$fs: OK"
|
||||
done
|
||||
}
|
||||
|
||||
zram_mount()
|
||||
{
|
||||
local i=0
|
||||
for i in $(seq 0 $(($dev_num - 1))); do
|
||||
echo "mount /dev/zram$i"
|
||||
mkdir zram$i
|
||||
mount /dev/zram$i zram$i > /dev/null || \
|
||||
echo "FAIL mount /dev/zram$i failed"
|
||||
dev_mounted=$i
|
||||
done
|
||||
|
||||
echo "zram mount of zram device(s): OK"
|
||||
}
|
||||
Loading…
Reference in New Issue