It is Ubuntu 16.04

$ uname -a
Linux m-x170 4.4.0-42-generic #62-Ubuntu SMP Fri Oct 7 23:11:45 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

The processor used is Xeon E3 1245 v5 that is spec'ed as quad core 8 threads per core.

dmidecode -t processor shows

Core Count: 4
Core Enabled: 4
Thread Count: 8
    64-bit capable
    Hardware Thread
    Execute Protection
    Enhanced Virtualization
    Power/Performance Control
And lscpu shows

$ lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    2
Core(s) per socket:    4
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 94
Model name:            Intel(R) Xeon(R) CPU E3-1245 v5 @ 3.50GHz

And when queried about HTT, it is there too.

$ sudo dmidecode | grep HTT
        HTT (Multi-threading)

The question is: Why is lscpu showing 2 threads per core where as the dmidecode reports 8 threads (meaning 8 per core)?

2 Answers 2


You have 4 CPU cores, with Hyper Threading (HTT) support you have one additional logical core per CPU.

So you have:

  • 4 physical cores
  • 8 logical cores

and the results of the commands are correct.


No, dmidecode reports 8 threads in total, which means 2 threads on each of the 4 cores.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.