Linux how many threads

No, you have two. It's showing two online CPU. You didn't include the rest of the lscpu info to determine that. You are showing 2 CPUs configured in 2 sockets.

Each socket has 1 core and each core has 1 thread. When you create your VM you configure how many total cores you want to present to the VM and how many sockets to emulate as this may have an impact on mostly Microsoft licensing if something is licensed per-core or per-socket. It's virtualized. I'm Skip to content Android Windows Linux Apple.

Home » Linux. See also How do I open an so file in Linux? See also How do I partition a Linux terminal? See also How does a Linux system boot? Like this post? Please share to your friends:. Lastly I hope the steps from the article to show threads per process, check thread count per process, check number of threads allowed on Linux was helpful.

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Table of Contents. In real time production environment it is always recommended to also create and release a man page for every script or tool we develop. Related Posts. If you multiply these numbers you will get the number of CPUs on your system.

The output of nproc corresponds to the CPU count from lscpu. For the desktop machine above this should match the 8 CPU s reported by lscpu :. For the desktop machine above this should match the 4 Core s per socket reported by lscpu:. To specifically answer your question you tell how many cores you have by multiplying the number of cores you have per socket by the number of sockets you have.

Another useful utility is dmidecode which outputs per socket information. In the case of the server system listed above we expect to see 8 cores per socket and 16 threads per socket:. The lscpu command has a number of useful options that you may like to check out, for example:. You have to look at sockets and cores per socket. In this case you have 1 physical CPU socket which has 4 cores cores per socket.

You can get this information by nproc 1 command. For the answer not to be confusing, you need to understand a couple of simple computer architecture concepts:. There are different types of instructions. The decision logic inside a CPU will dispatch the different instructions to different hardware units. A core refers to a set of actual execution hardware i. A socket is the physical slot on the motherboard into which a chip is inserted.

This chip has a certain number of cores on it. Two physical sockets, each containing a chip with 4 physical cores, making 8 cores total. The first machine can be executing precisely four instructions at any given time, period.

The second machine can execute between 8 and 16 instructions at any given time: 16 will be achieved only when each pair of CPUs is executing different types of instructions and so can share a core without waiting. Each chunk starts with this info:.

Cores are numbered starting from 0, so if the last chunk says processor : 3 as in this case, your machine has 4 cores.

That's all you need. It is the number of core online, regardless if hyperthreading is on or off. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. How to know number of cores of a system in Linux? Ask Question. Asked 6 years, 3 months ago.