今天，給大家分享一個記憶體壓力測試的工具，memtester，首先需要我們下載相關原始碼：

下載地址如下：http://pyropus.ca/software/memtester/

把memtester解壓到Android/external/下（此文預設讀者已有Android SDK）

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移植：

1：分別把conf-ld和conf-cc檔案中的"cc"（一般在檔案首行）替換成“arm-linux-androideabi-gcc”

2：編寫Android.mk，程式碼如下：

Line 1：返回當前路徑；Line 2：清除LOCAL_XXX變數；Line 3：編譯模組原始碼檔案；

Line 4：模組輸出名字；Line 5：額外的C標頭檔案；Line 6：生成編譯模組的路徑；

Line 7 生產可執行檔案（亦可是庫，根據變數而定）。

Line 1 2 3 4 7是Android.mk最基本的模板。

到此移植完成！

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編譯：

cd android，source build/envsetup.sh，lunch對應的平臺

mmm  android/external/memtester-xxx （"xxx"為你的memtester版本）

最終在/system/bin生成可執行檔案memtester！

如何使用，大家可以蒐羅一下該工具傳引數使用的方法。下面提供一個指令碼配合上述porting工作

#!/bin/sh

# Memory Tester Scripts
# by KaKa
# 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))
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 <<HELPEOF >&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.
HELPEOF
    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

執行這個指令碼

sh memory.sh -c <number> -l <number> -m <memory>

-c:執行幾個memtester

-l:執行幾次

-m:測試多大的記憶體，直接填測試總數即可，程式會自動分配個平均值給每個memtester，這樣省去我們自己的計算，也不用多開幾個終端了，單位MB，例如我有一個四核CPU，32G 記憶體的機器，就可以這樣執行：

sh memory.sh -c 4 -l 1 -m 3100

大家可以看這個指令碼中還可以限定時間，例如我想執行24個小時

sh memory.sh -t 24h -c 4 -m 3100