How to get all CPU cache information without root access

Question

I am trying to find out the cache mapping scheme for all the levels of class of a Linux server, including associativity, however I do not have root access. I would just use dmidecode for this but you need root access. Is there another way of getting the same information without root?

Answer 1

lscpu, in util-linux, describes the cache layout without requiring root:

[...]
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              8192K

The files in /sys/devices/system/cpu/cpu*/cache/ should contain all the information you’re looking for, including associativity, and are readable without being root, but they’re a little harder to parse:

grep . /sys/devices/system/cpu/cpu*/cache/index*/*

(I got this from Where is the L1 memory cache of Intel x86 processors documented?)