Linux下查询CPU 缓存的工具-白红宇

Linux下查询CPU 缓存的工具

阅读量：6976 次

发布时间：2019-06-27

本文共 1540 字，大约阅读时间需要 5 分钟。

在Linux下能够使用例如以下工具查询CPU缓存:

方式１:

$　lscpu

L1d cache:             32K　	(一级数据缓存)L1i cache:             32K　	(一级指令缓存)L2 cache:              256K　	(二级缓存)L3 cache:              8192K	(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

可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 Information	Socket Designation: CPU Internal L1	Configuration: Enabled, Not Socketed, Level 1	Operational Mode: Write Back	Location: Internal	Installed Size: 256 kB	Maximum Size: 256 kBHandle 0x003C, DMI type 7, 19 bytesCache Information	Socket Designation: CPU Internal L2	Configuration: Enabled, Not Socketed, Level 2	Operational Mode: Write Back	Location: Internal	Installed Size: 1024 kB	Maximum Size: 1024 kBHandle 0x003D, DMI type 7, 19 bytesCache Information	Socket Designation: CPU Internal L3	Configuration: Enabled, Not Socketed, Level 3	Operational Mode: Write Back	Location: Internal	Installed Size: 8192 kB	Maximum Size: 8192 kB

方式4:

$ cat /proc/cpuinfo