Is there a way to know the size of L1, L2, L3 cache and RAM in Ubuntu?

Is there a way to know the size of the L1, L2, L3 caches and RAM in Ubuntu?

Is there a terminal command or files I could look into?

Solution 1:

CPU information

Use the lscpu command:

$ lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                2
On-line CPU(s) list:   0,1
Thread(s) per core:    1
Core(s) per socket:    2
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            15
Model:                 6
Stepping:              5
CPU MHz:               2400.000
BogoMIPS:              6000.33
L1d cache:             16K
L2 cache:              2048K
NUMA node0 CPU(s):     0,1

Listed information is per CPU-core.

Memory information

There is the free command (-h gives results in human readable form, i.e. GiB rather then bytes):

$ free -h
             total       used       free     shared    buffers     cached
Mem:          2.0G       390M       1.6G        10M        15M       160M
-/+ buffers/cache:       215M       1.7G
Swap:         2.0G         0B       2.0G

Solution 2:

This will give you your cache information. Socket Designation will tell you which cache is being referred to in the section.

sudo dmidecode -t cache

For RAM there are a couple things to look at but meminfo should do it. I used grep here to only show total/free but you could use less or cat to see the whole thing. It shows a lot more information on memory size and usage than just size.

grep Mem /proc/meminfo

Solution 3:

Based on jkabrams answer with following command and filtering "cache" from it, each cache item you have be shown.

lscpu | grep cache

and RAM:

free -h

For more information about RAM, processes and so on you can use htop on your distro. Install it like this on ubuntu.

sudo apt-get install htop