Linux下查看CPU Cache信息

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Linux下查看CPU Cache级数，每级大小

(1) 第一种方法:
dmesg | grep cache

(2) 第二种方法:

[root@gc15 ~]# ls /sys/devices/system/cpu/cpu0/cache/index
index0/ index1/ index2/ index3/

一级cache, Data cache

index0和Index1是一级cache中的data和instruction cache
[root@gc15 ~]# cat /sys/devices/system/cpu/cpu0/cache/index0/level
1
[root@gc15 ~]# cat /sys/devices/system/cpu/cpu0/cache/index0/type
Data
[root@gc15 ~]# cat /sys/devices/system/cpu/cpu0/cache/index0/size
32K
一级cache, Instruction cache
[root@gc15 ~]# cat /sys/devices/system/cpu/cpu0/cache/index1/level
1
[root@gc15 ~]# cat /sys/devices/system/cpu/cpu0/cache/index1/type
Instruction
[root@gc15 ~]# cat /sys/devices/system/cpu/cpu0/cache/index1/size
32K

二级cache，共享的
[root@gc15 ~]# cat /sys/devices/system/cpu/cpu0/cache/index2/level
2
[root@gc15 ~]# cat /sys/devices/system/cpu/cpu0/cache/index3/type
Unified
[root@gc15 ~]# cat /sys/devices/system/cpu/cpu0/cache/index2/size
256K

三级cache，共享的
[root@gc15 ~]# cat /sys/devices/system/cpu/cpu0/cache/index3/level
3
[root@gc15 ~]# cat /sys/devices/system/cpu/cpu0/cache/index3/type
Unified
[root@gc15 ~]# cat /sys/devices/system/cpu/cpu0/cache/index3/size
12288K