stream

Stream测试是内存测试中业界公认的内存带宽性能测试基准工具。

安装 stream：

apt install -y stream

ICE-EVB 开发板测试：

root@thead-910:~# stream
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STREAM version $Revision: 5.10 $
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This system uses 8 bytes per array element.
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Array size = 10000000 (elements), Offset = 0 (elements)
Memory per array = 76.3 MiB (= 0.1 GiB).
Total memory required = 228.9 MiB (= 0.2 GiB).
Each kernel will be executed 10 times.
 The *best* time for each kernel (excluding the first iteration)
 will be used to compute the reported bandwidth.
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Your clock granularity/precision appears to be 1 microseconds.
Each test below will take on the order of 30088 microseconds.
   (= 30088 clock ticks)
Increase the size of the arrays if this shows that
you are not getting at least 20 clock ticks per test.
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WARNING -- The above is only a rough guideline.
For best results, please be sure you know the
precision of your system timer.
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Function    Best Rate MB/s  Avg time     Min time     Max time
Copy:            6965.0     0.022986     0.022972     0.023003
Scale:           7020.0     0.022831     0.022792     0.022890
Add:             6095.7     0.039484     0.039372     0.039601
Triad:           6105.9     0.040019     0.039306     0.042522
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Solution Validates: avg error less than 1.000000e-13 on all three arrays
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