Отключение технологии Intel Hyper-Threading

Отключение технологии Intel Hyper-Threading 

1. Выключить в BIOS режим HT (Hyperthreading) процессора
2. Выключить в BIOS режимы энергосбережения процессора "Intel SpeedStep" и "C-State"

$ 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
....
....
$ lscpu --extended
CPU NODE SOCKET CORE L1d:L1i:L2:L3 ONLINE MAXMHZ    MINMHZ
0   0    0      0    0:0:0:0       yes    4200,0000 800,0000
1   0    0      1    1:1:1:0       yes    4200,0000 800,0000
2   0    0      2    2:2:2:0       yes    4200,0000 800,0000
3   0    0      3    3:3:3:0       yes    4200,0000 800,0000
4   0    0      0    0:0:0:0       yes    4200,0000 800,0000
5   0    0      1    1:1:1:0       yes    4200,0000 800,0000
6   0    0      2    2:2:2:0       yes    4200,0000 800,0000
7   0    0      3    3:3:3:0       yes    4200,0000 800,0000


$ nano htdisable.sh

Вставить текст:

#!/bin/bash
for cpunum in $(cat /sys/devices/system/cpu/cpu*/topology/thread_siblings_list | cut -s -d, -f2- | tr ',' '\n' | sort -un)
do
        echo 0 > /sys/devices/system/cpu/cpu$cpunum/online
done

Сохранить.

sudo sh htdisable.sh

$ lscpu --extended

CPU NODE SOCKET CORE L1d:L1i:L2:L3 ONLINE MAXMHZ    MINMHZ
0   0    0      0    0:0:0:0       yes    4200,0000 800,0000
1   0    0      1    1:1:1:0       yes    4200,0000 800,0000
2   0    0      2    2:2:2:0       yes    4200,0000 800,0000
3   0    0      3    3:3:3:0       yes    4200,0000 800,0000
4   -    -      -    :::           no     4200,0000 800,0000
5   -    -      -    :::           no     4200,0000 800,0000
6   -    -      -    :::           no     4200,0000 800,0000
7   -    -      -    :::           no     4200,0000 800,0000

$ lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-3
Off-line CPU(s) list:  4-7
Thread(s) per core:    1
Core(s) per socket:    4
Socket(s):             1
NUMA node(s):          1



Как отключить ядро ​​процессора на Ubuntu / Debian

$ cat /proc/cpuinfo

$ echo 0 | sudo tee /sys/devices/system/cpu/cpu3/online
$ echo 0 | sudo tee /sys/devices/system/cpu/cpu2/online
$ echo 0 | sudo tee /sys/devices/system/cpu/cpu1/online

$ echo 1 | sudo tee /sys/devices/system/cpu/cpu3/online
$ echo 2 | sudo tee /sys/devices/system/cpu/cpu2/online
$ echo 3 | sudo tee /sys/devices/system/cpu/cpu1/online