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MISC-TN-009: Characterizing the RAM bandwidth of Mito8M SoM

1,918 bytes added, 13:58, 21 January 2020
Running
====Running====
=====ARM core clock = 800 MHz=====
<pre class="board-terminal">
armbian@Mito8M:~/devel/STREAM$ ./stream_c.exe
Add: 5263.5 0.046008 0.045597 0.046230
Triad: 4820.0 0.050297 0.049793 0.050723
-------------------------------------------------------------
Solution Validates: avg error less than 1.000000e-13 on all three arrays
-------------------------------------------------------------
</pre>
 
=====ARM core clock = 1300 MHz=====
<pre class="board-terminal">
armbian@Mito8M:~/devel/STREAM$ ./stream_c.exe
-------------------------------------------------------------
STREAM version $Revision: 5.10 $
-------------------------------------------------------------
This system uses 8 bytes per array element.
-------------------------------------------------------------
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.
-------------------------------------------------------------
Number of Threads requested = 4
Number of Threads counted = 4
-------------------------------------------------------------
Your clock granularity/precision appears to be 1 microseconds.
Each test below will take on the order of 43743 microseconds.
(= 43743 clock ticks)
Increase the size of the arrays if this shows that
you are not getting at least 20 clock ticks per test.
-------------------------------------------------------------
WARNING -- The above is only a rough guideline.
For best results, please be sure you know the
precision of your system timer.
-------------------------------------------------------------
Function Best Rate MB/s Avg time Min time Max time
Copy: 7124.7 0.022597 0.022457 0.022866
Scale: 7501.5 0.022730 0.021329 0.024132
Add: 6761.7 0.035827 0.035494 0.036168
Triad: 6354.1 0.038171 0.037771 0.038644
-------------------------------------------------------------
Solution Validates: avg error less than 1.000000e-13 on all three arrays
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