- 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
- 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
- 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
- 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
- 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。
- 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：