It has 2 cores and 4 CPUs. Usually when a linux duffer asks how many cores they mean how many logical threads are available. Technically speaking, linux is wrong to call hardware threads 'cpus'.
There's a huge amount of ambiguity in what CPUs and Cores mean as a result. But I get what you meant now, ty. Wil yea I call this out in my answer above: "You need to be careful of the term CPU as it means different things in different contexts". Personally I don't equate "cores" to logical processing units but to physical cores in the processor ie the physical processing units. Show 3 more comments.
For the answer not to be confusing, you need to understand a couple of simple computer architecture concepts: You run processes "programs" on your linux system. Each process consists of one or more threads Each thread is a separate sequence of instructions.
Two threads can be executed in parallel. Each instruction is given to a CPU to be executed. A CPU has logic that figures out what the bits of an instruction mean and decides what to do with it. You can have multiple CPUs that share one core - this is called hyperthreading. The idea: thread A is currently doing arithmetic, while thread B is loading something from memory. When that's true, threads A and B can efficiently share a single core without getting in each other's way A uses the ALU, B uses the memory unit.
Of course, sometimes both programs will want the ALU, and then they have to wait for each other Not wrong just confusing I want to say. I believe what I say here is consistent with the output of the lscpu command which the OP referenced. I have now 4 CPUs. I have one "quadcore processor", the vendor tells me on the box. Confusing, because I can easily say I have "a CPU that can run 8 threads" at a time yes, with hyperthreading, so it is more 5 or 6 threads' equivalent.
Before, you had 8 CPUs: eight pieces of hardware that could accept instructions to be run but with only 4 full sets of execution hardware. You are certainly correct that it is a little confusing. Thanks this command describing the information in detail.
Similar to unix. That's slightly different and useful for some needs. It's the number of processors that are online now i. It may be less than the total number of CPUs if one or more have been taken offline e. You can get the value of both these macros inside of a C source code too, by using the sysconf function. Type in man sysconf for more information. HalosGhost 4, 10 10 gold badges 30 30 silver badges 40 40 bronze badges.
This is simple, but I'm not sure it's accurate to the question. He asked for the number of cores: cores! My system has 24 cores: 48 cpus when hyper-threaded. What's the t 4 do for dmidecode? Does your example show 2 cores, or 6, or 12, or 24, or some other number? Xen 4 is processor , see linux. But using 4 as argument is a bad practice. Serge Roussak Serge Roussak 2 2 silver badges 9 9 bronze badges. Install and run neofetch in the CLI.
WM: Mutter Muffin :o. Jeremy Boden Jeremy Boden 1, 7 7 silver badges 17 17 bronze badges. Initially, CPUs use to come with single core, but manufacturers added more cores to increase performance, which is why the core came into the picture. See the following details for better understanding of this in real-time. This is the sample data I took from my system.
It contains useful information like CPU architecture, vendor name, model name. You can only get a number of CPUs by using the grep command as follows.
It prints the number of processing units available for the current process. The hwinfo command is a hardware information tool that is used to analyze the hardware on a computer and to display detailed information about the variety of hardware components in a human readable format. It reports information about CPU, RAM, keyboard, mouse, graphics card, sound, storage, network interface, disk, partition, bios, and bridge, etc,.
The top command provides a dynamic real-time view of the running system processes and a list of tasks currently managed by the Linux kernel. The Htop command is an open source ncurses-based process viewer for Linux. Note that you can choose the hardware info category to be generated. Once you have generated the report in html format, you can view it from a web browser as shown below. To display info about your CPU, use the --cpu.
You can share with us additional ways of extracting CPU information in Linux via the feedback form below. TecMint is the fastest growing and most trusted community site for any kind of Linux Articles, Guides and Books on the web. Millions of people visit TecMint! If you like what you are reading, please consider buying us a coffee or 2 as a token of appreciation. We are thankful for your never ending support. The CPU information includes details about the processor, like the architecture, vendor name, model, number of cores, a speed of each core etc.
There are quite a few commands on Linux to get those details about the CPU hardware, and here is about some of the commands.
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