ted-wq-x

#!/usr/bin/env bash

CMD=java

JAVA_VER=$(java -version 2>&1 | grep -i version | sed 's/.*version ".*\.\(.*\)\..*"/\1/; 1q')
if [ ${JAVA_VER} -lt 8 ]; then
    echo "JDK版本过低，请使用1.8及以上版本"
    exit 1
fi

ted-wq-x

public class CacheLineEffect {
    //考虑一般缓存行大小是64字节，一个 long 类型占8字节
    static  long[][] arr;
 
    public static void main(String[] args) {
        arr = new long[1024 * 1024][];
        for (int i = 0; i < 1024 * 1024; i++) {
            arr[i] = new long[8];
            for (int j = 0; j < 8; j++) {
                arr[i][j] = 0L;