CPU number of cores seems not correct

As the image shows number of processors are 4.

But intel i5-4210U has only 2 cores as shown below. (Intel's own specs.)

So, if i5-4210U has only 2 cores than what is "4" indicating in the 1st pic?

lscpu gives this result:

Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 2
Core(s) per socket: 2
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 69
Stepping: 1
CPU MHz: 989.531
BogoMIPS: 4788.74
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 3072K
NUMA node0 CPU(s): 0-3

3 Answers

Your CPU has only 2 cores, but supports 4 concurrent threads.

This is achieved by Intel's Hyper-Threading technology that allows to run two separate threads in parallel at the same time on one single core.

So 2 cores x 2 threads per core means 4 threads per CPU.

As you can see in the image you provided from Intel, the number of Threads is 4.

So I would say that Ubuntu is showing the number of Threads and not of the Cores

In i5-4210 processor of Intel there are 2 physical cores which are further split into 2 logical cores; these logical cores are achieved by Intel's hyper threading technology. Thus making it a total of 4 cores as shown in the pic. This info is also given in the other pic.