memtester使用说明.docx

memtester使用2010-08-16 18:20:21|分类： linux之路 |字号订阅 抄录一段官方的解释：A userspace utility for testing the memory subsystem for faults. Its portable and should compile and work on any 32- or 64-bit Unix-like system. (Yes, even weird, proprietary Unices, and even Mac OS X.) For hardware developers, memtester can be told to test memory starting at a particular physical address as of memtester version 4.1.0.操作步骤如下：rootlocalhost # wget http:/pyropus.ca/software/memtester/old-versions/memtester-4.2.0.tar.gzrootlocalhost # tar -xvf memtester-4.2.0.tar.gzrootlocalhost # cd memtester-4.2.0rootlocalhost # make & make installrootlocalhost memtester-4.2.0# vi READMEUsing memtester Usage is simple for the basic case. As root, run the resulting memtester binary with the following commandline: memtester runs An optional -p physaddr argument available to cause memtester to test memory starting at a specific physical memory address (by mmaping /dev/mem starting at an offset of physaddr, which is given in hex).#以上是节选，直接跟要测试的内存的大小就可以，默认单位是M，也可以手动指定为B, K, M, or G; -p参数是指定内存物理地址的。 For example, if you want to test a bank of RAM or device which is 64kbytes in size and starts at physical address 0x0C0000, you would run memtester as follows: memtester -p 0x0c0000 64k runsrootlocalhost memtester-4.2.0# memtester 256 memtester version 4.2.0 (32-bit)Copyright (C) 2010 Charles Cazabon.Licensed under the GNU General Public License version 2 (only).pagesize is 4096pagesizemask is 0xfffff000want 256MB (268435456 bytes)got 256MB (268435456 bytes), trying mlock .locked.Loop 1: Stuck Address : ok Random Value : ok Compare XOR : ok Compare SUB : ok Compare MUL : ok Compare DIV : ok Compare OR : ok Compare AND : ok Sequential Increment: ok Solid Bits : ok Block Sequential : ok Checkerboard : ok Bit Spread : ok Bit Flip : ok Walking Ones : ok Walking Zeroes : ok 8-bit Writes : ok 16-bit Writes : ok注：测试结果仅仅截取了一部分。我测试的过程中，使用的机器内存为1G，swap分区为4G。首次测试时，将测试的内存大小指为1G，机器死机。个人认为是由于memtester将 内存全部占用导致的。运行memteste非常简单，作为root ./ memtester runs :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# Memory Tester Scripts# by Baif# version = dateVERSION=Fri Oct 19 11:56:57 CST 2007# trap for irruptionsMEMTESTER=$PWD/memtesterPPIDKILL=$SIDKILL=$trap pkill -9 -P $PPIDKILL;kill -9 $ INTtrap pkill -9 -P $PPIDKILL;kill -9 $ KILLcat &2Version: $VERSIONPID: $PPIDKILL: $PPIDKILLSIDKILL: $PPIDKILLEOF_vppsCORE_NUM=$(grep -i processor /proc/cpuinfo|wc -l)MEMTESTERCOPY=$CORE_NUMMEM_TOTAL_K=$(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=$(MEM_TOTAL_TOBETESTED/MEMTESTERCOPY)RUN_DURATION_TIME=0RUN_LOOPS=-1RUN_DURATION_TIME_FLAG=0RUN_LOOPS_FLAG=0DDPERCOPY_TIME=6sLOGDIR=/tmp/memtester-log-$mkdir -p $LOGDIRshow_help () cat &2Version: $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 0while getopts:c:m:t:l:r:p:hHVvx OPTIONdo 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. esacdone#exit 0 -eq $RUN_DURATION_TIME_FLAG & 0 -eq $RUN_LOOPS_FLAG & echo & echo Please specified which mode should we run. -t or -l & show_help & echo & exit 225MEM_PER_COPY=$(MEM_TOTAL_TOBETESTED/MEMTESTERCOPY)echo Mem total: $(MEM_TOTAL_K/1024) MBecho Core total: $CORE_NUMecho Memtester copys: $MEMTESTERCOPYecho Mem per copy: $MEM_PER_COPYecho Mem total to used: $MEM_TOTAL_TOBETESTED MBif $MEM_RESERVED -lt 1 ;then echo Mem reserved: - No more memory reserved.else echo Mem reserved: $MEM_RESERVED MBfi#exit# GOGOGOif 0 -ne $RUN_DURATION_TIME_FLAG ; thenecho Run within a duration: $RUN_DURATION_TIMEelif 0 -ne $RUN_LOOPS_FLAG ;thenecho Run within a loop: $RUN_LOOPSfiecho Working directory: $PWDecho Memtester: $MEMTESTERecho LOGs directory: $LOGDIRechoecho -n Jobs started at date: date #+%Y/%m/%d %H:%Mecho#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_COPYMB for each). if 0 -ne $RUN_DURATION_TIME_FLAG ;then echo -n For time: $RUN_DURATION_TIME fiif 0 -ne $RUN_LOOPS_FLAG ;then echo -n For loops: $RUN_LOOPS fiecho .while truedo 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