Intel Westmere

Intel Xeon X5650 (Westmere-EP)

Intel Xeon X5650 (Westmere-EP), 32 nm, 6 cores, 1.17 B transistros, 248 mm2. LGA-1366, 95 W

1 GB pages mode (64-bit Linux)

  Size        Latency       Increase   Description

  32 K     4                           
  64 K     7                       3   + 6 (L2)        
 128 K     9                       2   
 256 K     9                       0
 512 K    26                      17   + 30 (L3)
   1 M    33                       7
   2 M    37                       4
   4 M    38                       1   
   8 M    39                       1
  16 M    40 + 15 ns       1 + 15 ns   + 67 ns (RAM)
  32 M    40 + 44 ns         + 29 ns
  64 M    40 + 54 ns         + 12 ns
 128 M    52 + 61 ns      12 +  7 ns   + 23 (TLB miss)
 256 M    58 + 64 ns       6 +  3 ns    
 512 M    61 + 66 ns       3 +  2 ns
1024 M    63 + 67 ns       2 +  1 ns

2 MB pages mode (64-bit Linux)

4 KB pages mode (64-bit Linux)

  Size        Latency       Increase   Description

  32 K     4                           
  64 K     7                       3   + 6 (L2)        
 128 K     9                       2   
 256 K    12                       3
 512 K    31                      19   + 30 (L3) +7 (L1 TLB miss)
   1 M    41                      10
   2 M    45                       4
   4 M    52                       7   + 9 (L2 TLB miss)
   8 M    55 + 1 ns        3 +  1 ns
  16 M    56 + 19 ns       1 + 18 ns   + 67 ns (RAM)
  32 M    56 + 44 ns           25 ns
  64 M    66 + 54 ns      10 + 10 ns
 128 M    76 + 61 ns      10 +  7 ns   + 10 (PDE cache miss) + 30 (Page walk to L3)
 256 M    86 + 65 ns      10 +  4 ns    
 512 M    91 + 66 ns       5 +  1 ns
1024 M    94 + 67 ns       3 +  1 ns
2048 M    96 + 75 ns       2 +  8 ns   
4096 M    96 + 91 ns           16 ns   + ? ns (Page walk to RAM)

Intel i5

Intel i5-650, Clarkdale, Westmere, 32 nm, 81 mm2, 382 M Transistors + GPU / RAM controller (45 nm, 177 M Transistors, 114 mm2).

GIGABYTE H55M-S2, Intel H55 (IbexPeak DH), Dual-Channel, 2 * 2048 MB PC3-10600 666.7 MHz DDR3 Kingston, 9-9-9-24, External Graphic Card.

4 KB pages mode (64-bit Windows, 64-bit soft)

Links

Westmere at Wikipedia