memtester测试——Linux内存测试工具
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一、Memtester简单介绍
Memtester主要是捕获内存错误和一直处于很高或者很低的坏位, 其测试的主要项目有随机值,异或比较,减法,乘法,除法,与或运算等等. 通过给定测试内存的大小和次数, 可以对系统现有的内存进行上面项目的测试。
二、安装
- 在http://pyropus.ca/software/memtester/ 下载memtester-4.3.0.tar.gz；
- 执行以下命令，安装Memtester。
tar zxvf memtester-4.2.2.tar.gz
cd memtester-4.2.2
make && make install
三、 参数介绍
memtester [-p PHYSADDR] [ITERATIONS]
参数说明：
MEMORY 申请测试内存的数量，单位默认是megabytes(兆)，也可以是B K M G。
ITERATIONS 测试的次数，默认是无限
四、测试实例
开始测试，申请28G内存，测试一次。如下图：
可使用free -h命令查看内存使用情况。
===================================
运行memteste非常简单，作为root ./ memtester <memory> [runs] <memory>:内存大小，单位M [runs]:运行次数 这样我们就可以对单颗CPU的机器进行测试，查看内存是否足够稳定。 但如果我有多颗CPU和较大的memory呢？最简单的方法是多开几个终端，同时运行memtester，每个CPU分配同样大小的内存。 还有一种方法可以使用Baif编写的一个脚本memtester-multi.sh，位置放在memtester-4.0.7下就可以了。 这个脚本只在linux下有效！#!/bin/sh运行这个脚本
# Memory Tester Scripts
# by Baif
# version = date
VERSION="Fri Oct 19 11:56:57 CST 2007"
# trap for irruptions
MEMTESTER=${PWD}/memtester
PPIDKILL=$$
SIDKILL=$$
trap "pkill -9 -P ${PPIDKILL};kill -9 $$" INT
trap "pkill -9 -P ${PPIDKILL};kill -9 $$" KILL
cat <<-EOF_vpps >&2
Version: ${VERSION}
PID: $$
PPIDKILL: ${PPIDKILL}
SIDKILL: ${PPIDKILL}
EOF_vpps
CORE_NUM=$(grep -i ^processor /proc/cpuinfo|wc -l)
MEMTESTERCOPY=${CORE_NUM}
MEM_TOTAL_K=$(awk '/^MemTotal/{print $2}' /proc/meminfo)
MEM_RESERVE_PERCENTAGE=$((1000*50/1024)) # 95%
MEM_RESERVED=$((MEM_TOTAL_K/1024*MEM_RESERVE_PERCENTAGE/1000))
MEM_TOTAL_TOBETESTED=$((MEM_TOTAL_K/1024-MEM_RESERVED))
MEM_PER_COPY=$((MEM_TOTAL_TOBETESTED/MEMTESTERCOPY))
RUN_DURATION_TIME=0
RUN_LOOPS=-1
RUN_DURATION_TIME_FLAG=0
RUN_LOOPS_FLAG=0
DDPERCOPY_TIME=6s
LOGDIR=/tmp/memtester-log-${$}
mkdir -p ${LOGDIR}
show_help ()
{
cat <<-EOFshow_HELP >&2
Version: ${VERSION}
Usage: $(basename ${0})
-r Directory: the root location of memtester binary file
-c NUMBER: the copies of memtester should be run
-m NUMBER: how many memory should be tested totally (in MB)
-t TIME: duration mode, how long will the tests go
-l NUMBER: loops mode,how many loops will each memtester should go
The option -t and -l are exclusive, which means tests could work
only with 1. duration mode or 2. loops mode
RUN 4 copies memtester with in 24 hours, to test total 4000 MB memory:
$(basename ${0}) -t 24h -c 4 -m 4000
RUN 2 copies memtester with in 1 hours, to test total 4000 MB memory:
$(basename ${0}) -t 1h -c 4 -m 4000
RUN 4 copies memtester with in 2 loops, to test total 3600 MB memory:
$(basename ${0}) -l 2 -c 4 -m 3600
-V/-h/-H: show this info.
EOFshow_HELP
exit 0
}
while getopts :c:m:t:l:r:p:hHVvx OPTION
do
case ${OPTION} in
c)
#echo "-c ${OPTARG}"
MEMTESTERCOPY=${OPTARG}
;;
m)
#echo "-m ${OPTARG} MB"
MEM_TOTAL_TOBETESTED=${OPTARG}
MEM_RESERVED=$((MEM_TOTAL_K/1024-MEM_TOTAL_TOBETESTED))
;;
t)
#echo "-t ${OPTARG}"
[ 0 -ne ${RUN_LOOPS_FLAG} ] && echo "-t and -l are exclusive." && exit 222
RUN_DURATION_TIME=${OPTARG}
RUN_DURATION_TIME_FLAG=1
;;
l)
#echo "-l ${OPTARG}"
[ 0 -ne ${RUN_DURATION_TIME_FLAG} ] && echo && echo "-t and -l are exclusive." && show_help && echo && exit 223
RUN_LOOPS=${OPTARG};
RUN_LOOPS_FLAG=1
;;
d)
#echo "-r ${OPTARG}"
MEMTESTER=${OPTARG}/memtester
;;
p)
#echo "-p ${OPTARG}"
MEMTESTER=${OPTARG}
;;
V|h|H)
show_help
;;
v)
set -v
;;
x)
set -x
;;
?) echo "Error...";
echo "?Unknown args..."
exit 224
;;
*) #echo "*Unknown args..."
esac
done
#exit
[ 0 -eq ${RUN_DURATION_TIME_FLAG} ] && [ 0 -eq ${RUN_LOOPS_FLAG} ] && echo && echo "Please specified which mode should we run... -t or -l" && show_help && echo && exit 225
MEM_PER_COPY=$((MEM_TOTAL_TOBETESTED/MEMTESTERCOPY))
echo "Mem total: " $((MEM_TOTAL_K/1024)) MB
echo "Core total: "${CORE_NUM}
echo "Memtester copys: " ${MEMTESTERCOPY}
echo "Mem per copy: "${MEM_PER_COPY}
echo "Mem total to used: "${MEM_TOTAL_TOBETESTED} MB
if [ ${MEM_RESERVED} -lt 1 ];
then
echo "Mem reserved: -- No more memory reserved..."
else
echo "Mem reserved: "${MEM_RESERVED} MB
fi
#exit
# GOGOGO
if [ 0 -ne ${RUN_DURATION_TIME_FLAG} ]; then
echo "Run within a duration: ${RUN_DURATION_TIME}"
elif [ 0 -ne ${RUN_LOOPS_FLAG} ];
then
echo "Run within a loop: ${RUN_LOOPS}"
fi
echo "Working directory: " $PWD
echo "Memtester: " ${MEMTESTER}
echo "LOGs directory: " $LOGDIR
echo
echo -n "Jobs started at date: "
date #+%Y/%m/%d\ %H:%M
echo
#exit
########################
# Run testing within a duration time.
if [ 0 -ne ${RUN_DURATION_TIME_FLAG} ]
then
# prepareing the sleeping killers
sleep ${RUN_DURATION_TIME}
echo -n "End of testing(TIMEOUT)... "
echo "KILL CHILD" && kill -9 $(pgrep -P ${PPIDKILL} memtester) && echo "Childen processes - KILLED."
# attention to how the memtesters are forked...
echo "KILL PARENT" && kill $$ && echo "KILLED." &
echo "Finished the memtester"
echo -n "Jobs finished at date: "
date #+%Y/%m/%d\ %H:%M
fi &
echo -n "Waiting (PID: $$) for ${MEMTESTERCOPY} memtesters(${MEM_PER_COPY}MB for each). "
if [ 0 -ne ${RUN_DURATION_TIME_FLAG} ];
then
echo -n "For time: ${RUN_DURATION_TIME} "
fi
if [ 0 -ne ${RUN_LOOPS_FLAG} ];
then
echo -n "For loops: ${RUN_LOOPS} "
fi
echo "..."
while true
do
MEMTESTER_NUM=0
echo -n "{"
while [ ${MEMTESTER_NUM} -lt ${MEMTESTERCOPY} ]
do
echo -n " ${MEMTESTER_NUM} "
if [ 0 -ne ${RUN_DURATION_TIME_FLAG} ]
then
RUN_LOOPS=0
fi
${MEMTESTER} ${MEM_PER_COPY} ${RUN_LOOPS} 2>&1 >> ${LOGDIR}/${MEMTESTER_NUM}.log &
# set loops = 0 to make memtester run loop infinitely...
# .pogo version will run only one loop by default
sleep ${DDPERCOPY_TIME}
MEMTESTER_NUM=$(expr $MEMTESTER_NUM + 1)
done
echo -n "}"
wait
[ 0 -ne ${RUN_LOOPS_FLAG} ] && break
# memtesters' loops...
done
########################
echo
echo -n "End of testing(Excution ended)... "
pkill -9 -P ${PPIDKILL}
kill $$
echo "Finished the memtester"
echo -n "Jobs finished at date: "
date #+%Y/%m/%d\ %H:%M
sh memtester-multi.sh –c <number> -l <number> -m <memory>-c：运行几个memtester -l: 运行几次 -m:测试多大的内存，直接填测试总数即可，程序会自动分配个平均值给每个memtester，这样省去我们自己的计算，也不用多开几个终端了，单位MB
例如我有一个4颗CPU，32G内存的机器，我就可以这样运行
sh memtester-multi.sh –c 4 –l 1 –m 3100
大家可以看这个脚本中还可以限定时间，例如我想运行24个小时
sh memtester-multi.sh –t 24h -c 4 –m 3100
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