ubuntu hyperthreading changes

Author: anoopna

playbooks/roles/hyperthreading/files/control_hyperthreading_ubuntu.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+if [ `id -u` -ne 0 ]
+then
+        echo $0: you need to be root
+        exit 1
+fi
+disable_ht() {
+        echo -n $0: disabling
+        echo off | sudo tee /sys/devices/system/cpu/smt/control
+}
+
+enable_ht() {
+        echo -n $0: enabling
+        echo on | sudo tee /sys/devices/system/cpu/smt/control
+}
+
+case "$1" in
+"1"|"on")
+        enable_ht
+        ;;
+"0"|"off")
+        disable_ht
+        ;;
+"show")
+        ;;
+*)
+        echo $0: wrong argument "$1"
+        exit 2
+        ;;
+esac
+
+echo ''
+lscpu | egrep "On-line|Off-line"
+
+exit 0

playbooks/roles/hyperthreading/files/disable-hyperthreading_ubuntu.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=Start this service to disable Hyperthreading, stop it to enable Hyperthreading.
+After=syslog.target irqbalance.service
+
+[Service]
+Type=oneshot
+RemainAfterExit=true
+ExecStart=/opt/oci-hpc/sbin/control_hyperthreading_ubuntu.sh off
+ExecStop=/opt/oci-hpc/sbin/control_hyperthreading_ubuntu.sh on
+
+[Install]
+WantedBy=multi-user.target