![]() Model name : Intel(R) Xeon(R) CPU E5-2430 v2 2.50GHzįlags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase smep ermsĪddress sizes : 46 bits physical, 48 bits virtualĭmidecode is also useful for determining what hardware a Linux system is running on. Here, the CPU (s) value indicates the number of logical cores, which is equal to 8 in our output. So an OS will report that a Core 2 Duo, for example, has 1 physical and 2 logical CPUs and an Intel P4 with hyper-threads will be reported exactly the same way even though 2 hyper-threads vs. On Intel CPUs this means HyperThreading is enabled and there are 6 physical cores. CPU cores are often not considered physical cores by the OS unless they have their own package or die. We have checked how we can find the number of cores. It shows the CPU has 6 cores but 12 "siblings". System processors can be dual-core, quad-core (4 cores), and even the latest generation can have 18 cores. grep core id /proc/cpuinfo core id : 16 core id : 0 core id : 17 core id : 1 core id : 25 core id : 9 core id : 26 core id : 10 Displays the number of sibling CPUs on the same physical CPU for architectures which use hyper-threading. The example below is from a 2 socket machine. But use this command it shows there are only 8 cores totally. How many cores does the laptop have All related (33). Model name : Intel(R) Core(TM)2 Duo CPU T5670 1.To add to the existing answers, you can determine information about Intel's HyperThreading by looking at the "siblings" line in /proc/cpuinfo. The output of the command cat /proc/cpuinfo is :CPU cores: 2, but on the laptop its written corei3. ![]() ![]() 2 processors with different physical id). So, for example, if your physical machine has 1 Quad core CPU, and your VM is configured to report 2 single core CPUs, you'll see 2 single core CPUs in cpuinfo (i.e. For example, on the x86 processor family, this number is the processor chip number (e.g., 586 ). ![]() This number varies with the CPU architecture. Its members include: cpu A number that represents the type of CPU. Model name : Intel(R) Core(TM)2 Duo CPU T5670 1.80GHzįlags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm lahf_lm ida dtsĪddress sizes : 36 bits physical, 48 bits virtual 2 Answers Sorted by: 21 Yes, a multi-core processor is a single piece of hardware ('one processor') that provides several cores than can work concurrently. Notice that if you're on a VM, you cannot know anything about the actual hardware (CPU, etc), all you know is what the VM tells you. The cpuinfoentry structure is automatically filled in by the startup library function initcpuinfo (). What do "processor" and "cpu cores" mean here? cat /proc/cpuinfo CPU-Z is a freeware that gathers information on some of the main devices of your system : Processor name and number, codename, process, package, cache levels. ![]()
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