Linux下查询CPU 缓存的工具

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在Linux下可以使用如下工具查询CPU缓存:

方式１:

$　lscpu

L1d cache:             32K　<span style="white-space:pre"></span>(一级数据缓存)L1i cache:             32K　<span style="white-space:pre"></span><span style="font-family: Arial, Helvetica, sans-serif;">(一级指令缓存)</span>L2 cache:              256K　<span style="white-space:pre"></span>(二级缓存)L3 cache:              8192K<span style="white-space:pre"></span>(三级缓存)

方式２:

$ cat /sys/devices/system/cpu/cpu0/cache/index0/size32K

$ cat /sys/devices/system/cpu/cpu0/cache/index0/level1
$ cat /sys/devices/system/cpu/cpu0/cache/index1/size32K
$ cat /sys/devices/system/cpu/cpu0/cache/index1/level1

$ cat /sys/devices/system/cpu/cpu0/cache/index2/size256K$ cat /sys/devices/system/cpu/cpu0/cache/index2/level2
$ cat /sys/devices/system/cpu/cpu0/cache/index3/size8192K

$ cat /sys/devices/system/cpu/cpu0/cache/index3/level3

方式３:

$ sudo dmidecode -t cache

但是结果与上述的有出路, 显示的L1缓存是256kB, L2缓存是1024 kB, 算上8核, 也与实现不符.

可能程序自身有点问题, 不建议用dmidecode.

# dmidecode 2.12SMBIOS 2.7 present.Handle 0x003B, DMI type 7, 19 bytesCache InformationSocket Designation: CPU Internal L1Configuration: Enabled, Not Socketed, Level 1Operational Mode: Write BackLocation: InternalInstalled Size: 256 kBMaximum Size: 256 kBHandle 0x003C, DMI type 7, 19 bytesCache InformationSocket Designation: CPU Internal L2Configuration: Enabled, Not Socketed, Level 2Operational Mode: Write BackLocation: InternalInstalled Size: 1024 kBMaximum Size: 1024 kBHandle 0x003D, DMI type 7, 19 bytesCache InformationSocket Designation: CPU Internal L3Configuration: Enabled, Not Socketed, Level 3Operational Mode: Write BackLocation: InternalInstalled Size: 8192 kBMaximum Size: 8192 kB

方式4:

$ cat /proc/cpuinfo

cache size: 8192 KB

这个只是显示出 L3 cache的大小,　也并不准确.

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