ODROID-GO-ADVANCE 2.0 开源掌机 BSP 说明

msh />tinymemnench 
tinymembench v0.4 (simple benchmark for memory throughput and latency)

==========================================================================
== Memory bandwidth tests                                               ==
==                                                                      ==
== Note 1: 1MB = 1000000 bytes                                          ==
== Note 2: Results for 'copy' tests show how many bytes can be          ==
==         copied per second (adding together read and writen           ==
==         bytes would have provided twice higher numbers)              ==
== Note 3: 2-pass copy means that we are using a small temporary buffer ==
==         to first fetch data into it, and only then write it to the   ==
==         destination (source -> L1 cache, L1 cache -> destination)    ==
== Note 4: If sample standard deviation exceeds 0.1%, it is shown in    ==
==         brackets                                                     ==
==========================================================================

 C copy backwards                                     :    851.6 MB/s
 C copy backwards (32 byte blocks)                    :    850.2 MB/s
 C copy backwards (64 byte blocks)                    :    829.2 MB/s
 C copy                                               :    833.3 MB/s
 C copy prefetched (32 bytes step)                    :    881.5 MB/s
 C copy prefetched (64 bytes step)                    :    875.3 MB/s
 C 2-pass copy                                        :    740.2 MB/s
 C 2-pass copy prefetched (32 bytes step)             :    762.6 MB/s
 C 2-pass copy prefetched (64 bytes step)             :    762.6 MB/s
 C fill                                               :   2472.4 MB/s
 C fill (shuffle within 16 byte blocks)               :   2475.3 MB/s
 C fill (shuffle within 32 byte blocks)               :   2472.4 MB/s
 C fill (shuffle within 64 byte blocks)               :   2472.4 MB/s
 ---
 standard memcpy                                      :    854.5 MB/s
 standard memset                                      :   2472.4 MB/s
 ---
 NEON LDP/STP copy                                    :    900.4 MB/s
 NEON LD1/ST1 copy                                    :    883.0 MB/s
 NEON STP fill                                        :   2475.3 MB/s
 NEON STNP fill                                       :   2441.0 MB/s
 ARM LDP/STP copy                                     :    867.8 MB/s
 ARM STP fill                                         :   2472.4 MB/s
 ARM STNP fill                                        :   2443.8 MB/s

==========================================================================
== Memory latency test                                                  ==
==                                                                      ==
== Average time is measured for random memory accesses in the buffers   ==
== of different sizes. The larger is the buffer, the more significant   ==
== are relative contributions of TLB, L1/L2 cache misses and SDRAM      ==
== accesses. For extremely large buffer sizes we are expecting to see   ==
== page table walk with several requests to SDRAM for almost every      ==
== memory access (though 64MiB is not nearly large enough to experience ==
== this effect to its fullest).                                         ==
==                                                                      ==
== Note 1: All the numbers are representing extra time, which needs to  ==
==         be added to L1 cache latency. The cycle timings for L1 cache ==
==         latency can be usually found in the processor documentation. ==
== Note 2: Dual random read means that we are simultaneously performing ==
==         two independent memory accesses at a time. In the case if    ==
==         the memory subsystem can't handle multiple outstanding       ==
==         requests, dual random read has the same timings as two       ==
==         single reads performed one after another.                    ==
==========================================================================

block size : single random read / dual random read
      1024 :    0.0 ns          /     0.0 ns 
      2048 :    0.0 ns          /     0.0 ns 
      4096 :    0.0 ns          /     0.0 ns 
      8192 :    0.0 ns          /     0.0 ns 
     16384 :    0.0 ns          /     0.0 ns 
     32768 :    0.1 ns          /     0.1 ns 
     65536 :   11.4 ns          /    18.5 ns 
    131072 :   17.4 ns          /    25.6 ns 
    262144 :   21.6 ns          /    29.9 ns 
    524288 :  128.6 ns          /   196.1 ns 
   1048576 :  192.1 ns          /   256.5 ns 
   2097152 :  224.9 ns          /   276.6 ns 
   4194304 :  242.4 ns          /   283.3 ns 
   8388608 :  251.3 ns          /   286.0 ns 
  16777216 :  255.3 ns          /   287.3 ns 
  33554432 :  257.3 ns          /   287.9 ns 
  67108864 :  258.2 ns          /   288.3 ns