How to Use Linux lscpu Command Tutorial

1. What does Lscpu command do in Linux?
2. How do you read Lscpu output?
3. What is Lscpu?
4. How do you read Lscpu?
5. What is on line CPU's list?
6. What is stepping in Lscpu?
7. What does cores per socket mean?
8. What is CPU MHz in Proc Cpuinfo?
9. How is L1 cache size calculated?

What does Lscpu command do in Linux?

lscpu gathers CPU architecture information from sysfs and /proc/cpuinfo. The command output can be optimized for parsing or for easy readability by humans. The information includes, for example, the number of CPUs, threads, cores, sockets, and Non-Uniform Memory Access (NUMA) nodes.

How do you read Lscpu output?

“CPU(s): 56” represents the number of logical cores, which equals “Thread(s) per core” × “Core(s) per socket” × “Socket(s)”. One socket is one physical CPU package (which occupies one socket on the motherboard); each socket hosts a number of physical cores, and each core can run one or more threads.

What is Lscpu?

DESCRIPTION top. lscpu gathers CPU architecture information from sysfs, /proc/cpuinfo and any applicable architecture-specific libraries (e.g. librtas on Powerpc). The command output can be optimized for parsing or for easy readability by humans.

How do you read Lscpu?

1 Answer. “CPU(s): 56” represents the number of logical cores, which equals “Thread(s) per core” × “Core(s) per socket” × “Socket(s)”. One socket is one physical CPU package (which occupies one socket on the motherboard); each socket hosts a number of physical cores, and each core can run one or more threads.

What is on line CPU's list?

2 Answers. ONLINE : Indicator that shows whether the Linux instance currently makes use of the CPU. This is in line with your sample output provided, it means that of the 8 CPUS you have, cores 0 to 6 are online (making a total of 7 CPUs online), one is offline, however, your linux instance isn't making use of that one ...

What is stepping in Lscpu?

It is a version number. The processor design is tweaked or fixed over the course of the product lifetime, and the stepping number identifies how old (or new) it is. See also: Stepping level on Wikipedia.

What does cores per socket mean?

A socket is the physical socket where the physical CPU capsules are placed. A normal PC only have one socket. Cores are the number of CPU-cores per CPU capsule. A modern standard CPU for a standard PC usually have two or four cores. And some CPUs can run more than one parallel thread per CPU-core.

What is CPU MHz in Proc Cpuinfo?

/proc/cpuinfo has a separate MHz entry for every logical core. grep MHz /proc/cpuinfo is one way to monitor the clock speeds of your cores. There is no "single value". –

How is L1 cache size calculated?

On the Task Manager screen, click on the Performance tab > click on CPU in the left pane. In the right-pane, you will see L1, L2 and L3 Cache sizes listed under “Virtualization” section. As you can see in the image above, the CPU in this case has very small L1, L2 and L3 Cache size.