playbook/ors: disable hyperthreading

playbook/roles/ors/files/configure-grub

 #!/bin/bash
 CONF="/etc/default/grub"
 BAK="/tmp/default.grub"
+N_CORE="$(($(lscpu | sed -n 's/^Core.*: *\([0-9]*\)/\1/gp') * $(lscpu | sed -n 's/^Socket.*: *\([0-9]*\)/\1/gp')))"
 cp $CONF $BAK;
-if ! grep -q idle=halt /proc/cmdline; then
+if ! (grep -q idle=halt /proc/cmdline && grep -q "maxcpus=$N_CORE" /proc/cmdline); then
   sed -i 's/^\(GRUB_CMDLINE_LINUX_DEFAULT.*\)idle=[a-z]* *\(.*\)/\1\2/g' $CONF;
   sed -i 's/^\(GRUB_CMDLINE_LINUX_DEFAULT.*\)"/\1 idle=halt"/g' $CONF;
+  sed -i 's/^\(GRUB_CMDLINE_LINUX_DEFAULT.*\)maxcpus=[0-9]* *\(.*\)/\1\2/g' $CONF;
+  sed -i 's/^\(GRUB_CMDLINE_LINUX_DEFAULT.*\)"/\1 maxcpus='"$N_CORE"'"/g' $CONF;
   if ! update-grub; then
     cp $BAK $CONF;
     update-grub;

playbook/sha256sum

-2f6f68fd28b5bae04559ee19b2ecf926b4dbe929d13200a214d1287ec2cd3d32  -
+fc085ff3a6ec4b99b7baff843ace3c10d82bbdd70297ad86a45a31f24fa3fc2b  -