Memory Performance Testing

1. 介绍

这是一个运行在 RT-Thread 上的内存性能测试软件包，用于测试 ARM CPU 的 Memory 读写性能以及 Cache 性能。

1.1 目录结构

名称	说明
inc	头文件目录
src	源代码目录

1.2 许可证

MemoryPerf 软件包遵循 MIT 许可，详见 LICENSE 文件。

1.3 依赖

具有良好的移植性，无操作系统依赖。

2. 如何打开 MemoryPerf

说明：描述该 package 位于 menuconfig 的位置，并对与其相关的配置进行介绍

使用 MemoryPerf package 需要在 RT-Thread 的包管理器中选择它，具体路径如下：

RT-Thread online packages
    tools packages --->
        [*] MemoryPerf: Memory Performance Testing for ARM CPU.

然后让 RT-Thread 的包管理器自动更新，或者使用 pkgs --update 命令更新包到 BSP 中。

3. 使用 MemoryPerf

• 在 msh 中运行 <memory_perf 0x10100000 0x100000> 命令

3.1 测试示例一

测试环境 zynq7045 Cortex-A9 800M SDRAM uncached -O3 ：

msh />memory_perf 0x10100000 0x100000
Memory performance testing start...
address: 0x10100000, length: 0x100000
Data length : 209 MB.
--------------------------------------
8-bit write speed test begin.
Spend time : 7.480000 s.
8-bit write speed: 28.036793 M/s.
8-bit read speed test begin.
Spend time : 5.380000 s.
8-bit Read speed: 38.980518 M/s.
--------------------------------------
16-bit write speed test begin.
Spend time : 3.740000 s.
16-bit write speed: 56.073586 M/s.
16-bit read speed test begin.
Spend time : 2.690000 s.
16-bit Read speed: 77.961037 M/s.
--------------------------------------
32-bit write speed test begin.
Spend time : 1.870000 s.
32-bit Write speed: 112.147171 M/s.
32-bit read speed test begin.
Spend time : 1.350000 s.
32-bit Read speed: 155.344589 M/s.
Memory performance completed.

3.2 测试示例二

测试环境 zynq7045 Cortex-A9 800M SDRAM cached -O3 ：

msh />memory_perf 0x10100000 0x100000 # Testing with cache
Memory performance testing start...
address: 0x10100000, length: 0x100000
Data length : 209 MB.
--------------------------------------
8-bit write speed test begin.
Spend time : 0.290000 s.
8-bit write speed: 723.155884 M/s.    # Achieve the best write performance
8-bit read speed test begin.
Spend time : 0.490000 s.
8-bit Read speed: 427.990204 M/s.
--------------------------------------
16-bit write speed test begin.
Spend time : 0.290000 s.
16-bit write speed: 723.155884 M/s.   # Achieve the best write performance
16-bit read speed test begin.
Spend time : 0.410000 s.
16-bit Read speed: 511.500488 M/s.
--------------------------------------
32-bit write speed test begin.
Spend time : 0.290000 s.
32-bit Write speed: 723.155884 M/s.   # Achieve the best write performance
32-bit read speed test begin.
Spend time : 0.370000 s.
32-bit Read speed: 566.797852 M/s.
Memory performance completed.

3.3 测试示例三

测试环境 stm32f407-atk-explorer Cortex-M4 168M SRAM uncached -O3 ：

msh >memory_perf 0x20010000 0x10000
Memory performance testing start...
address: 0x20010000, length: 0x10000, iterations: 200
Data length : 13 MB.
--------------------------------------
8-bit write speed test begin.
Spend time : 0.139000 s.
8-bit write speed: 94.296402 M/s.
8-bit read speed test begin.
Spend time : 0.361000 s.
8-bit Read speed: 36.308033 M/s.
--------------------------------------
16-bit write speed test begin.
Spend time : 0.070000 s.
16-bit write speed: 187.245712 M/s.
16-bit read speed test begin.
Spend time : 0.180000 s.
16-bit Read speed: 72.817780 M/s.
--------------------------------------
32-bit write speed test begin.
Spend time : 0.035000 s.
32-bit Write speed: 374.491425 M/s.
32-bit read speed test begin.
Spend time : 0.090000 s.
32-bit Read speed: 145.635559 M/s.
Memory performance completed.

4、注意事项

• 检查内存测试地址与长度是否设置正确
• 测试内存性能时推荐对比打开 cache 与 关闭 cache 的测试结果

5、联系方式

• 维护：我夏了夏天 （SummerGift）
• 主页：https://github.com/SummerLife