完整 Dhrystone 测试流程

下载标准代码：

bash

wget http://www.roylongbottom.org.uk/dhrystone/dhry2.c

编译并运行（无优化）：

bash

gcc -O0 dhry2.c -o dhrystone

./dhrystone 10000000 # 手动指定循环次数10,000,000

输出示例：

Dhrystone Benchmark, Version 2.1 (Language: C)
Optimisation Opt 3
Number of runs 10000000
Microseconds for one run: 0.200
Dhrystones per Second: 5000000

VAX MIPS rating = 2845.53

DMIPS：5000000 / 1757 ≈ 2845.53。
KDMIPS：2845.53 / 1000 ≈ 2.85。