Hyper threading não está funcionando no Ubuntu 16.04 [closed]

Question

Estou executando o Ubuntu 16.04.4 LTS como principal e único SO no meu Intel Xeon E5-2666 v3 , e a CPU suporta hyper-threading (HTT). No entanto, eu posso ver que o hyper-threading está desativado quando eu uso o

sudo dmidecode -t processor shows

dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 3.0.0 present. 
Invalid entry length (16). Fixed up to 11. 
Handle 0x0065, 
DMI type 4, 42 bytes
Processor Information
Socket Designation: SOCKET 0
Type: Central Processor
Family: Xeon
Manufacturer: Intel
ID: F2 06 03 00 FF FB EB BF
Signature: Type 0, Family 6, Model 63, Stepping 2
Flags:
    FPU (Floating-point unit on-chip)
    VME (Virtual mode extension)
    DE (Debugging extension)
    PSE (Page size extension)
    TSC (Time stamp counter)
    MSR (Model specific registers)
    PAE (Physical address extension)
    MCE (Machine check exception)
    CX8 (CMPXCHG8 instruction supported)
    APIC (On-chip APIC hardware supported)
    SEP (Fast system call)
    MTRR (Memory type range registers)
    PGE (Page global enable)
    MCA (Machine check architecture)
    CMOV (Conditional move instruction supported)
    PAT (Page attribute table)
    PSE-36 (36-bit page size extension)
    CLFSH (CLFLUSH instruction supported)
    DS (Debug store)
    ACPI (ACPI supported)
    MMX (MMX technology supported)
    FXSR (FXSAVE and FXSTOR instructions supported)
    SSE (Streaming SIMD extensions)
    SSE2 (Streaming SIMD extensions 2)
    SS (Self-snoop)
    HTT (Multi-threading)
    TM (Thermal monitor supported)
    PBE (Pending break enabled)

Version: Genuine Intel(R) CPU @ 2.90GHz
Voltage: 0.0 V

External Clock: 100 MHz
Max Speed: 8000 MHz
Current Speed: 3300 MHz
Status: Populated, Enabled
Upgrade: Socket LGA2011-3
L1 Cache Handle: 0x0062
L2 Cache Handle: 0x0063
L3 Cache Handle: 0x0064

Serial Number: Not Specified
Asset Tag: Not Specified
Part Number: Not Specified

Core Count: 10
Core Enabled: 10
Thread Count: 10

Characteristics:
    64-bit capable
    Multi-Core
    Execute Protection
    Enhanced Virtualization
    Power/Performance Control

...

lscpu | grep -e Model -e Step -e ^CPU\(s\) -e Thread
CPU(s):                10
Thread(s) per core:    1
Model:                 63
Model name:            Genuine Intel(R) CPU @ 2.90GHz 
Stepping:              2

e o monitor do sistema mostra

Por favor, me ajude a ativar o HTT permanentemente, porque eu procuro por toda parte sem uma resposta ou resposta real da comunidade.