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  • 查看Processor Cache的6种方法 linux为主

    1. lscpu 
      1 [root@localhost home]# lscpu| grep cache
2 L1d cache: 32K
3 L1i cache: 32K
4 L2 cache: 1024K
5 L3 cache: 36608K

      可以看出FLC是64KB,MLC是1MB,LLC是35.75MB

    2. getconf 
       1 [root@localhost home]# getconf -a| grep CACHE
 2 LEVEL1_ICACHE_SIZE 32768
 3 LEVEL1_ICACHE_ASSOC 8
 4 LEVEL1_ICACHE_LINESIZE 64
 5 LEVEL1_DCACHE_SIZE 32768
 6 LEVEL1_DCACHE_ASSOC 8
 7 LEVEL1_DCACHE_LINESIZE 64
 8 LEVEL2_CACHE_SIZE 1048576
 9 LEVEL2_CACHE_ASSOC 16
10 LEVEL2_CACHE_LINESIZE 64
11 LEVEL3_CACHE_SIZE 37486592
12 LEVEL3_CACHE_ASSOC 11
13 LEVEL3_CACHE_LINESIZE 64
14 LEVEL4_CACHE_SIZE 0
15 LEVEL4_CACHE_ASSOC 0
16 LEVEL4_CACHE_LINESIZE 0

      可以看出FLC是8路组相连，MLC是16路组相连，LLC是11路组相连

    3. lstopo-no-graphics 
       1 [root@localhost home]# lstopo-no-graphics
 2 Package L#0 + L3 L#0 (36MB)
 3       L2 L#0 (1024KB) + L1d L#0 (32KB) + L1i L#0 (32KB) + Core L#0
 4         PU L#0 (P#0)
 5         PU L#1 (P#52)
 6       L2 L#1 (1024KB) + L1d L#1 (32KB) + L1i L#1 (32KB) + Core L#1
 7         PU L#2 (P#1)
 8         PU L#3 (P#53)
 9       L2 L#2 (1024KB) + L1d L#2 (32KB) + L1i L#2 (32KB) + Core L#2
10         PU L#4 (P#2)
11         PU L#5 (P#54)

      可以看出numa架构的关系和分布

    4. lshw 
       1 *-cache:0
 2           description: L1 cache
 3           physical id: 4d
 4           slot: L1-Cache
 5           size: 1664KiB
 6           capacity: 1664KiB
 7           capabilities: synchronous internal write-back instruction
 8           configuration: level=1
 9      *-cache:1
10           description: L2 cache
11           physical id: 4e
12           slot: L2-Cache
13           size: 26MiB
14           capacity: 26MiB
15           capabilities: synchronous internal varies unified
16           configuration: level=2
17      *-cache:2
18           description: L3 cache
19           physical id: 4f
20           slot: L3-Cache
21           size: 35MiB
22           capacity: 35MiB
23           capabilities: synchronous internal varies unified
24           configuration: level=3
25 *-cache:3
26           description: L1 cache
27           physical id: 51
28           slot: L1-Cache
29           size: 1664KiB
30           capacity: 1664KiB
31           capabilities: synchronous internal write-back instruction
32           configuration: level=1
33      *-cache:4
34           description: L2 cache
35           physical id: 52
36           slot: L2-Cache
37           size: 26MiB
38           capacity: 26MiB
39           capabilities: synchronous internal varies unified
40           configuration: level=2
41      *-cache:5
42           description: L3 cache
43           physical id: 53
44           slot: L3-Cache
45           size: 35MiB
46           capacity: 35MiB
47           capabilities: synchronous internal varies unified
48           configuration: level=3

      有一些属性可以参考

    5. dmidecode 
        1 [root@localhost hexo]# dmidecode -t cache
  2 # dmidecode 3.0
  3 Getting SMBIOS data from sysfs.
  4 SMBIOS 2.8 present.
  5 
  6 Handle 0x004D, DMI type 7, 19 bytes
  7 Cache Information
  8  Socket Designation: L1-Cache
  9  Configuration: Enabled, Not Socketed, Level 1
 10  Operational Mode: Write Back
 11  Location: Internal
 12  Installed Size: 1664 kB
 13  Maximum Size: 1664 kB
 14  Supported SRAM Types:
 15   Synchronous
 16  Installed SRAM Type: Synchronous
 17  Speed: Unknown
 18  Error Correction Type: Parity
 19  System Type: Instruction
 20  Associativity: 8-way Set-associative
 21 
 22 Handle 0x004E, DMI type 7, 19 bytes
 23 Cache Information
 24  Socket Designation: L2-Cache
 25  Configuration: Enabled, Not Socketed, Level 2
 26  Operational Mode: Varies With Memory Address
 27  Location: Internal
 28  Installed Size: 26624 kB
 29  Maximum Size: 26624 kB
 30  Supported SRAM Types:
 31   Synchronous
 32  Installed SRAM Type: Synchronous
 33  Speed: Unknown
 34  Error Correction Type: Single-bit ECC
 35  System Type: Unified
 36  Associativity: 16-way Set-associative
 37 
 38 Handle 0x004F, DMI type 7, 19 bytes
 39 Cache Information
 40  Socket Designation: L3-Cache
 41  Configuration: Enabled, Not Socketed, Level 3
 42  Operational Mode: Varies With Memory Address
 43  Location: Internal
 44  Installed Size: 36608 kB
 45  Maximum Size: 36608 kB
 46  Supported SRAM Types:
 47   Synchronous
 48  Installed SRAM Type: Synchronous
 49  Speed: Unknown
 50  Error Correction Type: Single-bit ECC
 51  System Type: Unified
 52  Associativity: Fully Associative
 53 
 54 Handle 0x0051, DMI type 7, 19 bytes
 55 Cache Information
 56  Socket Designation: L1-Cache
 57  Configuration: Enabled, Not Socketed, Level 1
 58  Operational Mode: Write Back
 59  Location: Internal
 60  Installed Size: 1664 kB
 61  Maximum Size: 1664 kB
 62  Supported SRAM Types:
 63   Synchronous
 64  Installed SRAM Type: Synchronous
 65  Speed: Unknown
 66  Error Correction Type: Parity
 67  System Type: Instruction
 68  Associativity: 8-way Set-associative
 69 
 70 Handle 0x0052, DMI type 7, 19 bytes
 71 Cache Information
 72  Socket Designation: L2-Cache
 73  Configuration: Enabled, Not Socketed, Level 2
 74  Operational Mode: Varies With Memory Address
 75  Location: Internal
 76  Installed Size: 26624 kB
 77  Maximum Size: 26624 kB
 78  Supported SRAM Types:
 79   Synchronous
 80  Installed SRAM Type: Synchronous
 81  Speed: Unknown
 82  Error Correction Type: Single-bit ECC
 83  System Type: Unified
 84  Associativity: 16-way Set-associative
 85 
 86 Handle 0x0053, DMI type 7, 19 bytes
 87 Cache Information
 88  Socket Designation: L3-Cache
 89  Configuration: Enabled, Not Socketed, Level 3
 90  Operational Mode: Varies With Memory Address
 91  Location: Internal
 92  Installed Size: 36608 kB
 93  Maximum Size: 36608 kB
 94  Supported SRAM Types:
 95   Synchronous
 96  Installed SRAM Type: Synchronous
 97  Speed: Unknown
 98  Error Correction Type: Single-bit ECC
 99  System Type: Unified
100  Associativity: Fully Associative

      这里面是最全面的，可以看出三级缓存是全相连。另外一级是奇偶校验的，二级和三级是ECC可以纠正一位错误的校验方式。

    6. dmesg

    　　

     1 [root@localhost home]# dmesg | grep cache
 2 [ 0.024720] Dentry cache hash table entries: 33554432 (order: 16, 268435456 bytes)
 3 [ 0.081708] Inode-cache hash table entries: 16777216 (order: 15, 134217728 bytes)
 4 [ 0.105769] Mount-cache hash table entries: 524288 (order: 10, 4194304 bytes)
 5 [ 0.106076] Mountpoint-cache hash table entries: 524288 (order: 10, 4194304 bytes)
 6 [ 2.743578] PCI: pci_cache_line_size set to 64 bytes
 7 [ 3.450593] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
 8 [ 3.559022] xhci_hcd 0000:00:14.0: cache line size of 64 is not supported
 9 [688870.188178] bash (322228): drop_caches: 3
10 [688886.365874] bash (322228): drop_caches: 2
11 [688894.903068] bash (322228): drop_caches: 1

    参考:

    https://superuser.com/questions/55776/how-to-find-the-l2-cache-size-in-linux/55777

    windows可以下载一个工具，coreinfo

     1 Logical Processor to Cache Map:
 2 **------------------------------------------------------  Data Cache          0, Level 1,   32 KB, Assoc   8, LineSize  64
 3 **------------------------------------------------------  Instruction Cache   0, Level 1,   32 KB, Assoc   8, LineSize  64
 4 **------------------------------------------------------  Unified Cache       0, Level 2,  256 KB, Assoc   8, LineSize  64
 5 ****************************----------------------------  Unified Cache       1, Level 3,   35 MB, Assoc  20, LineSize  64
 6 --**----------------------------------------------------  Data Cache          1, Level 1,   32 KB, Assoc   8, LineSize  64
 7 --**----------------------------------------------------  Instruction Cache   1, Level 1,   32 KB, Assoc   8, LineSize  64
 8 --**----------------------------------------------------  Unified Cache       2, Level 2,  256 KB, Assoc   8, LineSize  64
 9 ----**--------------------------------------------------  Data Cache          2, Level 1,   32 KB, Assoc   8, LineSize  64
10 ----**--------------------------------------------------  Instruction Cache   2, Level 1,   32 KB, Assoc   8, LineSize  64
11 ----**--------------------------------------------------  Unified Cache       3, Level 2,  256 KB, Assoc   8, LineSize  64
12 ------**------------------------------------------------  Data Cache          3, Level 1,   32 KB, Assoc   8, LineSize  64
13 ------**------------------------------------------------  Instruction Cache   3, Level 1,   32 KB, Assoc   8, LineSize  64
14 ------**------------------------------------------------  Unified Cache       4, Level 2,  256 KB, Assoc   8, LineSize  64
15 --------**----------------------------------------------  Data Cache          4, Level 1,   32 KB, Assoc   8, LineSize  64
16 --------**----------------------------------------------  Instruction Cache   4, Level 1,   32 KB, Assoc   8, LineSize  64
17 --------**----------------------------------------------  Unified Cache       5, Level 2,  256 KB, Assoc   8, LineSize  64
18 ----------**--------------------------------------------  Data Cache          5, Level 1,   32 KB, Assoc   8, LineSize  64
19 ----------**--------------------------------------------  Instruction Cache   5, Level 1,   32 KB, Assoc   8, LineSize  64
20 ----------**--------------------------------------------  Unified Cache       6, Level 2,  256 KB, Assoc   8, LineSize  64
21 ------------**------------------------------------------  Data Cache          6, Level 1,   32 KB, Assoc   8, LineSize  64
22 ------------**------------------------------------------  Instruction Cache   6, Level 1,   32 KB, Assoc   8, LineSize  64
23 ------------**------------------------------------------  Unified Cache       7, Level 2,  256 KB, Assoc   8, LineSize  64
24 --------------**----------------------------------------  Data Cache          7, Level 1,   32 KB, Assoc   8, LineSize  64
25 --------------**----------------------------------------  Instruction Cache   7, Level 1,   32 KB, Assoc   8, LineSize  64
26 --------------**----------------------------------------  Unified Cache       8, Level 2,  256 KB, Assoc   8, LineSize  64
27 ----------------**--------------------------------------  Data Cache          8, Level 1,   32 KB, Assoc   8, LineSize  64
28 ----------------**--------------------------------------  Instruction Cache   8, Level 1,   32 KB, Assoc   8, LineSize  64
29 ----------------**--------------------------------------  Unified Cache       9, Level 2,  256 KB, Assoc   8, LineSize  64
30 ------------------**------------------------------------  Data Cache          9, Level 1,   32 KB, Assoc   8, LineSize  64
31 ------------------**------------------------------------  Instruction Cache   9, Level 1,   32 KB, Assoc   8, LineSize  64
32 ------------------**------------------------------------  Unified Cache      10, Level 2,  256 KB, Assoc   8, LineSize  64
33 --------------------**----------------------------------  Data Cache         10, Level 1,   32 KB, Assoc   8, LineSize  64
34 --------------------**----------------------------------  Instruction Cache  10, Level 1,   32 KB, Assoc   8, LineSize  64
35 --------------------**----------------------------------  Unified Cache      11, Level 2,  256 KB, Assoc   8, LineSize  64
36 ----------------------**--------------------------------  Data Cache         11, Level 1,   32 KB, Assoc   8, LineSize  64
37 ----------------------**--------------------------------  Instruction Cache  11, Level 1,   32 KB, Assoc   8, LineSize  64
38 ----------------------**--------------------------------  Unified Cache      12, Level 2,  256 KB, Assoc   8, LineSize  64
39 ------------------------**------------------------------  Data Cache         12, Level 1,   32 KB, Assoc   8, LineSize  64
40 ------------------------**------------------------------  Instruction Cache  12, Level 1,   32 KB, Assoc   8, LineSize  64
41 ------------------------**------------------------------  Unified Cache      13, Level 2,  256 KB, Assoc   8, LineSize  64
42 --------------------------**----------------------------  Data Cache         13, Level 1,   32 KB, Assoc   8, LineSize  64
43 --------------------------**----------------------------  Instruction Cache  13, Level 1,   32 KB, Assoc   8, LineSize  64
44 --------------------------**----------------------------  Unified Cache      14, Level 2,  256 KB, Assoc   8, LineSize  64
45 ----------------------------**--------------------------  Data Cache         14, Level 1,   32 KB, Assoc   8, LineSize  64
46 ----------------------------**--------------------------  Instruction Cache  14, Level 1,   32 KB, Assoc   8, LineSize  64
47 ----------------------------**--------------------------  Unified Cache      15, Level 2,  256 KB, Assoc   8, LineSize  64
48 ----------------------------****************************  Unified Cache      16, Level 3,   35 MB, Assoc  20, LineSize  64
49 ------------------------------**------------------------  Data Cache         15, Level 1,   32 KB, Assoc   8, LineSize  64
50 ------------------------------**------------------------  Instruction Cache  15, Level 1,   32 KB, Assoc   8, LineSize  64
51 ------------------------------**------------------------  Unified Cache      17, Level 2,  256 KB, Assoc   8, LineSize  64
52 --------------------------------**----------------------  Data Cache         16, Level 1,   32 KB, Assoc   8, LineSize  64
53 --------------------------------**----------------------  Instruction Cache  16, Level 1,   32 KB, Assoc   8, LineSize  64
54 --------------------------------**----------------------  Unified Cache      18, Level 2,  256 KB, Assoc   8, LineSize  64
55 ----------------------------------**--------------------  Data Cache         17, Level 1,   32 KB, Assoc   8, LineSize  64
56 ----------------------------------**--------------------  Instruction Cache  17, Level 1,   32 KB, Assoc   8, LineSize  64
57 ----------------------------------**--------------------  Unified Cache      19, Level 2,  256 KB, Assoc   8, LineSize  64
58 ------------------------------------**------------------  Data Cache         18, Level 1,   32 KB, Assoc   8, LineSize  64
59 ------------------------------------**------------------  Instruction Cache  18, Level 1,   32 KB, Assoc   8, LineSize  64
60 ------------------------------------**------------------  Unified Cache      20, Level 2,  256 KB, Assoc   8, LineSize  64
61 --------------------------------------**----------------  Data Cache         19, Level 1,   32 KB, Assoc   8, LineSize  64
62 --------------------------------------**----------------  Instruction Cache  19, Level 1,   32 KB, Assoc   8, LineSize  64
63 --------------------------------------**----------------  Unified Cache      21, Level 2,  256 KB, Assoc   8, LineSize  64
64 ----------------------------------------**--------------  Data Cache         20, Level 1,   32 KB, Assoc   8, LineSize  64
65 ----------------------------------------**--------------  Instruction Cache  20, Level 1,   32 KB, Assoc   8, LineSize  64
66 ----------------------------------------**--------------  Unified Cache      22, Level 2,  256 KB, Assoc   8, LineSize  64
67 ------------------------------------------**------------  Data Cache         21, Level 1,   32 KB, Assoc   8, LineSize  64
68 ------------------------------------------**------------  Instruction Cache  21, Level 1,   32 KB, Assoc   8, LineSize  64
69 ------------------------------------------**------------  Unified Cache      23, Level 2,  256 KB, Assoc   8, LineSize  64
70 --------------------------------------------**----------  Data Cache         22, Level 1,   32 KB, Assoc   8, LineSize  64
71 --------------------------------------------**----------  Instruction Cache  22, Level 1,   32 KB, Assoc   8, LineSize  64
72 --------------------------------------------**----------  Unified Cache      24, Level 2,  256 KB, Assoc   8, LineSize  64
73 ----------------------------------------------**--------  Data Cache         23, Level 1,   32 KB, Assoc   8, LineSize  64
74 ----------------------------------------------**--------  Instruction Cache  23, Level 1,   32 KB, Assoc   8, LineSize  64
75 ----------------------------------------------**--------  Unified Cache      25, Level 2,  256 KB, Assoc   8, LineSize  64
76 ------------------------------------------------**------  Data Cache         24, Level 1,   32 KB, Assoc   8, LineSize  64
77 ------------------------------------------------**------  Instruction Cache  24, Level 1,   32 KB, Assoc   8, LineSize  64
78 ------------------------------------------------**------  Unified Cache      26, Level 2,  256 KB, Assoc   8, LineSize  64
79 --------------------------------------------------**----  Data Cache         25, Level 1,   32 KB, Assoc   8, LineSize  64
80 --------------------------------------------------**----  Instruction Cache  25, Level 1,   32 KB, Assoc   8, LineSize  64
81 --------------------------------------------------**----  Unified Cache      27, Level 2,  256 KB, Assoc   8, LineSize  64
82 ----------------------------------------------------**--  Data Cache         26, Level 1,   32 KB, Assoc   8, LineSize  64
83 ----------------------------------------------------**--  Instruction Cache  26, Level 1,   32 KB, Assoc   8, LineSize  64
84 ----------------------------------------------------**--  Unified Cache      28, Level 2,  256 KB, Assoc   8, LineSize  64
85 ------------------------------------------------------**  Data Cache         27, Level 1,   32 KB, Assoc   8, LineSize  64
86 ------------------------------------------------------**  Instruction Cache  27, Level 1,   32 KB, Assoc   8, LineSize  64
87 ------------------------------------------------------**  Unified Cache      29, Level 2,  256 KB, Assoc   8, LineSize  64

    参考：

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  • 原文地址：https://www.cnblogs.com/kongchung/p/9334782.html
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