Tinymembench Result For Ci20

tinymembench v0.4.9 (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                                     :    112.4 MB/s (1.1%)
 C copy backwards (32 byte blocks)                    :    112.7 MB/s                                                       
 C copy backwards (64 byte blocks)                    :    112.6 MB/s                                                       
 C copy                                               :    113.9 MB/s                                                       
 C copy prefetched (32 bytes step)                    :    113.9 MB/s                                                       
 C copy prefetched (64 bytes step)                    :    114.0 MB/s (0.1%)                                                
 C 2-pass copy                                        :    171.1 MB/s                                                       
 C 2-pass copy prefetched (32 bytes step)             :    171.1 MB/s (0.3%)                                                
 C 2-pass copy prefetched (64 bytes step)             :    170.9 MB/s                                                       
 C fill                                               :    378.3 MB/s (1.1%)                                                
 C fill (shuffle within 16 byte blocks)               :    378.4 MB/s (0.2%)                                                
 C fill (shuffle within 32 byte blocks)               :    375.4 MB/s                                                       
 C fill (shuffle within 64 byte blocks)               :    378.7 MB/s (0.6%)
 ---
 standard memcpy                                      :    113.1 MB/s
 standard memset                                      :    378.7 MB/s (0.6%)

==========================================================================
== 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 :    0.3 ns          /     0.4 ns 
     65536 :   12.0 ns          /    25.7 ns 
    131072 :   18.1 ns          /    41.3 ns 
    262144 :   24.8 ns          /    59.5 ns 
    524288 :   69.0 ns          /   144.9 ns 
   1048576 :  259.6 ns          /   526.1 ns 
   2097152 :  314.3 ns          /   634.3 ns 
   4194304 :  332.4 ns          /   670.8 ns 
   8388608 :  340.1 ns          /   689.6 ns 
  16777216 :  346.3 ns          /   712.7 ns 
  33554432 :  353.8 ns          /   729.3 ns 
  67108864 :  361.0 ns          /   742.7 ns