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## 原版介绍 MBW determines the "copy" memory bandwidth available to userspace programs. Its simplistic approach models that of real applications. It is not tuned to extremes and it is not aware of hardware architecture, just like your average software package. 2006, 2012 Andras.Horvath atnospam gmail.com 2013 j.m.slocum atnospam gmail.com 2022 Willian.Zhang http://github.com/raas/mbw https://github.com/Willian-Zhang/mbw 'mbw 1000' to run copy memory test on all methods with 1 GiB memory. 'mbw -h' for help watch out for swap usage (or turn off swap) ## 内存带宽测试 一、内存带宽测试工具-mbw 官网: [https://github.com/raas/mbw](https://github.com/raas/mbw) 1、定义︰ mbw是一个内存带宽测试工具（通常用来评估用户层应用程序进行内存拷贝操作所能够达到的带宽），可以测试在内存拷贝memcpy、字符串拷贝dumb、内存块拷贝mcblock三种不同方式下的内存拷贝速度。 ``` # 执行./mbw -q -n 10 256 0 Method: MEMCPY Elapsed: 0.40160 MiB: 256.00000 Copy: 637.445 MiB/s 1 Method: MEMCPY Elapsed: 0.40880 MiB: 256.00000 Copy: 626.220 MiB/s 2 Method: MEMCPY Elapsed: 0.40573 MiB: 256.00000 Copy: 630.958 MiB/s 3 Method: MEMCPY Elapsed: 0.40926 MiB: 256.00000 Copy: 625.515 MiB/s 4 Method: MEMCPY Elapsed: 0.40153 MiB: 256.00000 Copy: 637.557 MiB/s 5 Method: MEMCPY Elapsed: 0.40643 MiB: 256.00000 Copy: 629.876 MiB/s 6 Method: MEMCPY Elapsed: 0.40633 MiB: 256.00000 Copy: 630.033 MiB/s 7 Method: MEMCPY Elapsed: 0.39993 MiB: 256.00000 Copy: 640.107 MiB/s 8 Method: MEMCPY Elapsed: 0.40830 MiB: 256.00000 Copy: 626.990 MiB/s 9 Method: MEMCPY Elapsed: 0.40592 MiB: 256.00000 Copy: 630.658 MiB/s # 平均内存拷贝速率 AVG Method: MEMCPY Elapsed: 0.40538 MiB: 256.00000 Copy: 631.499 MiB/s 0 Method: DUMB Elapsed: 2.34952 MiB: 256.00000 Copy: 108.958 MiB/s 1 Method: DUMB Elapsed: 2.36435 MiB: 256.00000 Copy: 108.275 MiB/s 2 Method: DUMB Elapsed: 2.37933 MiB: 256.00000 Copy: 107.593 MiB/s 3 Method: DUMB Elapsed: 2.37711 MiB: 256.00000 Copy: 107.694 MiB/s 4 Method: DUMB Elapsed: 2.37978 MiB: 256.00000 Copy: 107.573 MiB/s 5 Method: DUMB Elapsed: 2.37809 MiB: 256.00000 Copy: 107.649 MiB/s 6 Method: DUMB Elapsed: 2.37918 MiB: 256.00000 Copy: 107.600 MiB/s 7 Method: DUMB Elapsed: 2.37318 MiB: 256.00000 Copy: 107.872 MiB/s 8 Method: DUMB Elapsed: 2.37923 MiB: 256.00000 Copy: 107.598 MiB/s 9 Method: DUMB Elapsed: 2.37884 MiB: 256.00000 Copy: 107.615 MiB/s # 平均字符串拷贝速率 AVG Method: DUMB Elapsed: 2.37386 MiB: 256.00000 Copy: 107.841 MiB/s 0 Method: MCBLOCK Elapsed: 0.40630 MiB: 256.00000 Copy: 630.073 MiB/s 1 Method: MCBLOCK Elapsed: 0.40481 MiB: 256.00000 Copy: 632.403 MiB/s 2 Method: MCBLOCK Elapsed: 0.40667 MiB: 256.00000 Copy: 629.506 MiB/s 3 Method: MCBLOCK Elapsed: 0.40812 MiB: 256.00000 Copy: 627.265 MiB/s 4 Method: MCBLOCK Elapsed: 0.40810 MiB: 256.00000 Copy: 627.302 MiB/s 5 Method: MCBLOCK Elapsed: 0.40398 MiB: 256.00000 Copy: 633.688 MiB/s 6 Method: MCBLOCK Elapsed: 0.40793 MiB: 256.00000 Copy: 627.560 MiB/s 7 Method: MCBLOCK Elapsed: 0.41343 MiB: 256.00000 Copy: 619.206 MiB/s 8 Method: MCBLOCK Elapsed: 0.40220 MiB: 256.00000 Copy: 636.496 MiB/s 9 Method: MCBLOCK Elapsed: 0.40724 MiB: 256.00000 Copy: 628.630 MiB/s # 平均内存块拷贝速率 AVG Method: MCBLOCK Elapsed: 0.40688 MiB: 256.00000 Copy: 629.182 MiB/s ```
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