Unix how many cores

You can use one of the following command to find the number of physical CPU cores including all cores on Linux:. We can get the number of physical and logical CPU cores using lscpu command in Linux as follows. In the above example, the computer has 2 CPU sockets. Each CPU socket has 8 physical cores. Hence, the computer has 16 physical cores in total. Select the Performance tab to see how many cores and logical processors your PC has.

To see the total amount of physical RAM installed, you can run sudo lshw -c memory which will show you each individual bank of RAM you have installed, as well as the total size for the System Memory. This will likely presented as GiB value, which you can again multiply by to get the MiB value. You are commenting using your Facebook account. Notify me of new comments via email.

Notify me of new posts via email. Physical cores are just that, physical cores within the CPU. Logical cores are the abilities of a single core to do 2 or more things simultaneously through the use of hyper-threading We can get the number of physical and logical CPU cores using lscpu command in Linux as follows.

Socket s : 2 Each CPU socket has 8 physical cores. So please read on and let us know if you other options we can share. I had a recent email from one of my customers. His organization was about ready to go through some licensing true-ups and he was in a bit of a pickle. He had a few 3rd-party products they needed to do some accounting on and each product was licensed using a different model.

Sadly they did not have any type of CMDB in place to help Configuration Management Database - something very handy to have when it comes to looking at your server inventory. So we worked on a few simple commands that can be used to produce this data. First we tried this:. At this command's "core" [ha ha, pun intended] we got exactly what my pal Tom wanted, and then some. Not only can we see how many sockets he was using which is what he was reporting for but we also found out how many cores there were in each socket.

This told us exactly how many sockets we had. And then for fun Tom is nothing if not fun we wondered how you could account for if something was hyperthreaded or not so he whipped out this:. These commands worked from RHEL6 back to RHEL4 so most everyone should be able to use them, So if you're interested in giving these a whirl, there are also a few official knowledge solutions produced by our esteemed Ryan Sawhill you may want to review too:. And far and away the best hidden nugget from the older article was a tool that I use very often here during my day helping support customers: xsos.

You can get xsos here:. Yum repo available for xsos -- a tool for sysadmins. How to determine number of CPU sockets on a system. Difference between physical cpus, cpu cores, and logical cpus. So what do you think? Is this useful stuff? Will this save you any time or even help you start off your own CMDB?

We'd love to hear from you! Update the version of xsos you have on that lab system. It's insaaaaaaaanely out of date. See: Yum repo available for xsos -- a tool for sysadmins. Amusingly, I was having to do this just the other day. Had a dual quad-core server that was showing up as 16 CPUs because of hyperthreading. Speaking of which: when using performance tools that show CPU data and those tools aren't terribly MP-aware, what's the best way to normalize your data?

Generally speaking, six cores is usually considered optimal for gaming in Four cores can still cut it but would hardly be a future-proof solution. Eight or more cores might provide performance improvement, but all this depends mainly on how a particular game is coded and what GPU the CPU would be paired with it. Many late-model desktop Core i5 and Core i7 chips have six cores, and a few ultra-high-end gaming PCs come with eight-core Core i7s.

In the old days, every processor had just one core that could focus on one task at a time. Today, CPUs have been two and 18 cores, each of which can work on a different task. Skip to content Android Windows Linux Apple. Home » Other.