AMD Ryzen 7900x3D DDR5 6000 - ssvb/tinymembench GitHub Wiki

 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                                     :  48321.7 MB/s (18.8%)                                      
 C copy backwards (32 byte blocks)                    :  47628.1 MB/s (0.3%)                                       
 C copy backwards (64 byte blocks)                    :  47885.9 MB/s                                              
 C copy                                               :  48211.4 MB/s (0.1%)                                       
 C copy prefetched (32 bytes step)                    :  47304.3 MB/s                                              
 C copy prefetched (64 bytes step)                    :  50757.6 MB/s                                              
 C 2-pass copy                                        :  25137.1 MB/s (0.5%)                                       
 C 2-pass copy prefetched (32 bytes step)             :  23931.1 MB/s                                              
 C 2-pass copy prefetched (64 bytes step)             :  25435.1 MB/s (0.2%)                                       
 C fill                                               :  75265.3 MB/s                                              
 C fill (shuffle within 16 byte blocks)               :  76294.6 MB/s (0.2%)                                       
 C fill (shuffle within 32 byte blocks)               :  76073.8 MB/s                                              
 C fill (shuffle within 64 byte blocks)               :  62570.5 MB/s                                              
 ---                                                                                                               
 standard memcpy                                      :  31184.8 MB/s                                              
 standard memset                                      :  31158.8 MB/s                                              
 ---                                                                                                               
 MOVSB copy                                           :  31211.1 MB/s                                              
 MOVSD copy                                           :  31211.9 MB/s                                              
 SSE2 copy                                            :  57494.7 MB/s (0.2%)                                       
 SSE2 nontemporal copy                                :  31169.8 MB/s                                              
 SSE2 copy prefetched (32 bytes step)                 :  56528.2 MB/s                                              
 SSE2 copy prefetched (64 bytes step)                 :  56897.5 MB/s (0.1%)                                       
 SSE2 nontemporal copy prefetched (32 bytes step)     :  31195.8 MB/s                                              
 SSE2 nontemporal copy prefetched (64 bytes step)     :  31197.4 MB/s                                              
 SSE2 2-pass copy                                     :  37280.4 MB/s (0.3%)                                       
 SSE2 2-pass copy prefetched (32 bytes step)          :  36950.4 MB/s (0.3%)                                       
 SSE2 2-pass copy prefetched (64 bytes step)          :  36885.6 MB/s (0.8%)                                       
 SSE2 2-pass nontemporal copy                         :   5190.9 MB/s (0.3%)                                       
 SSE2 fill                                            :  78373.8 MB/s                                              
 SSE2 nontemporal fill                                :  31131.0 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, [MADV_NOHUGEPAGE]                                              
      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 :    0.0 ns          /     0.0 ns                                                                       
     65536 :    1.0 ns          /     1.4 ns                                                                       
    131072 :    1.5 ns          /     1.8 ns                                                                       
    262144 :    1.7 ns          /     1.9 ns                                                                       
    524288 :    2.5 ns          /     2.9 ns                                                                       
   1048576 :    3.0 ns          /     3.4 ns                                                                       
   2097152 :    7.1 ns          /     9.3 ns                                                                       
   4194304 :    9.2 ns          /    11.0 ns                                                                       
   8388608 :   10.2 ns          /    11.6 ns                                                                       
  16777216 :   11.9 ns          /    13.6 ns                                                                       
  33554432 :   13.9 ns          /    15.7 ns                                                                       
  67108864 :   15.2 ns          /    16.9 ns                                                                       

block size : single random read / dual random read, [MADV_HUGEPAGE]                                                
      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 :    0.0 ns          /     0.0 ns                                                                       
     65536 :    1.0 ns          /     1.4 ns                                                                       
    131072 :    1.5 ns          /     1.8 ns                                                                       
    262144 :    1.7 ns          /     1.9 ns                                                                       
    524288 :    1.9 ns          /     2.0 ns                                                                       
   1048576 :    2.0 ns          /     2.0 ns                                                                       
   2097152 :    5.9 ns          /     7.9 ns                                                                       
   4194304 :    7.7 ns          /     9.6 ns                                                                       
   8388608 :    8.7 ns          /    10.1 ns                                                                       
  16777216 :    9.2 ns          /    10.3 ns                                                                       
  33554432 :    9.4 ns          /    10.4 ns                                                                       
  67108864 :    9.6 ns          /    10.4 ns