原文：https://blog.csdn.net/mpu_nice/article/details/106918188

實現思想：借鑑虛擬記憶體的思想，建立虛擬記憶體檔案系統，不斷寫入資料達到消耗記憶體的目的，需要清除記憶體時，刪除建立的虛擬記憶體目錄即可。

#使用虛擬記憶體構造記憶體消耗

mkdir /tmp/memory

mount -t tmpfs -o size=1024M tmpfs /tmp/memory

dd if=/dev/zero of=/tmp/memory/block

#釋放消耗的虛擬記憶體

rm /tmp/memory/block

umount /tmp/memory

rmdir /tmp/memory

下面的程式碼為自己平時在測試過程中需要構造linux記憶體使用率的場景記憶體測試：

#!/bin/bash
# Destription: testing memory usage
# Example : sh memory_usage.sh 500M | sh memory_usage.sh 1G | sh memory_usage.sh release

FILE_NAME=`basename $0`
memsize=$2
function usage()
{
echo "Usage:$FILE_NAME consume memory_size|release -----the value of memory_size like 100M 2G and etc"
echo "Example: $FILE_NAME consume 1G"
echo " $FILE_NAME release"
}
function consume()
{
if [ -d /tmp/memory ];then
echo "/tmp/memory already exists"
else
mkdir /tmp/memory
fi
mount -t tmpfs -o size=$1 tmpfs /tmp/memory
dd if=/dev/zero of=/tmp/memory/block

}

function release()
{
rm /tmp/memory/block;ret=$?
if [ $ret != 0 ]; then
echo "remove memory data failed"
return $ret
fi

umount /tmp/memory;ret=$?
if [ $ret != 0 ]; then
echo "umount memory filedir failed"
return $ret
fi

rmdir /tmp/memory;ret=$?
if [ $ret != 0 ]; then
echo "remove memory filedir failed"
return $ret
fi

}

function main()
{
case "$1" in
consume) consume $memsize;;
release) release;;
*) usage;exit 1;;
esac
}

main $*
測試結果：

————————————————
版權宣告：本文為CSDN博主「mBeNice」的原創文章，遵循CC 4.0 BY-SA版權協議，轉載請附上原文出處連結及本宣告。
原文連結：https://blog.csdn.net/mpu_nice/article/details/106918188