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[kernel] Change grub cmdline to set c-states to 0 for "Intel" CPUs #6051

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merged 3 commits into from
Dec 7, 2020
Merged

[kernel] Change grub cmdline to set c-states to 0 for "Intel" CPUs #6051

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858434b
Change grub cmdline to set c-states to 0
Nov 15, 2020
b211331
Check if CPU vendor is Intel
Nov 30, 2020
48a0298
Update install.sh
shlomibitton Dec 3, 2020
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11 changes: 10 additions & 1 deletion installer/x86_64/install.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -535,8 +535,17 @@ trap_push "rm $grub_cfg || true"

[ -r ./platform.conf ] && . ./platform.conf

# Check if the CPU vendor is 'Intel' and disable c-states if True
CPUVENDOR=$(cat /proc/cpuinfo | grep -m 1 vendor_id | awk '{print $3}')
echo "Switch CPU vendor is: $CPUVENDOR"
if [[ $(echo $CPUVENDOR | grep -i "Intel") ]] ; then
CSTATES="intel_idle.max_cstate=0"
else
CSTATES=""
fi
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DEFAULT_GRUB_SERIAL_COMMAND="serial --port=${CONSOLE_PORT} --speed=${CONSOLE_SPEED} --word=8 --parity=no --stop=1"
DEFAULT_GRUB_CMDLINE_LINUX="console=tty0 console=ttyS${CONSOLE_DEV},${CONSOLE_SPEED}n8 quiet"
DEFAULT_GRUB_CMDLINE_LINUX="console=tty0 console=ttyS${CONSOLE_DEV},${CONSOLE_SPEED}n8 quiet $CSTATES"
GRUB_SERIAL_COMMAND=${GRUB_SERIAL_COMMAND:-"$DEFAULT_GRUB_SERIAL_COMMAND"}
GRUB_CMDLINE_LINUX=${GRUB_CMDLINE_LINUX:-"$DEFAULT_GRUB_CMDLINE_LINUX"}
export GRUB_SERIAL_COMMAND
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