Intel Bradwell

Intel i7-6900K (Bradwell), 4.0 GHz, 14 nm. RAM: 32 GB (unknown).

1 GB pages

  Size        Latency       Increase   Description

  32 K     4                           
  64 K     8                       4   + 8 (L2)        
 128 K    10                       2   
 256 K    11                       1
 512 K    37                      26   + 47 (L3)
   1 M    48                      11
   2 M    54                       6
   4 M    56                       2
   8 M    58                       2   
  16 M    59                       1   
  32 M    59 + 15 ns           15 ns   + 46 ns (RAM)
  64 M    59 + 31 ns           16 ns
 128 M    59 + 39 ns            8 ns   
 256 M    59 + 42 ns            3 ns
 512 M    59 + 44 ns            2 ns
1024 M    59 + 45 ns            1 ns

2 MB pages mode

  Size        Latency       Increase   Description

  32 K     4                           
  64 K     8                       4   + 8 (L2)        
 128 K    10                       2   
 256 K    11                       1
 512 K    37                      26   + 47 (L3)
   1 M    48                      11
   2 M    54                       6
   4 M    56                       2
   8 M    58                       2   
  16 M    59                       1   
  32 M    59 + 15 ns           15 ns   + 46 ns (RAM)
  64 M    59 + 31 ns           16 ns
 128 M    63 + 39 ns       4 +  8 ns   + 8 (TLB miss)
 256 M    65 + 42 ns       2 +  3 ns
 512 M    66 + 44 ns       1 +  2 ns
1024 M    67 + 45 ns       1 +  1 ns

4 KB pages mode (64-bit Windows)

  Size        Latency       Increase   Description

  32 K     4                           
  64 K     8                       4   + 8 (L2)        
 128 K    10                       2   
 256 K    11                       1
 512 K    41                      30   + 47 (L3) +8 (L1 TLB miss)
   1 M    54                      13
   2 M    61                       7   
   4 M    64                       3
   8 M    69 +                     5   + 14 (L2 TLB miss)
  16 M    80 +                    11   
  32 M    92 + 15 ns      12 + 15 ns   + 46 ns (RAM)
  64 M   104 + 31 ns      12 + 16 ns
 128 M   119 + 39 ns      15 +  8 ns   +  ? (PDE cache miss) + ? (Page walk to L3)
 256 M   133 + 42 ns      14 +  3 ns
 512 M   137 + 44 ns       4 +  2 ns
1024 M   140 + 45 ns       3 +  1 ns

MISC

Links

Broadwell at Wikipedia