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#!/bin/bash
##############################################################################
## Copyright (c) 2015 Intel Corp.
##
## All rights reserved. This program and the accompanying materials
## are made available under the terms of the Apache License, Version 2.0
## which accompanies this distribution, and is available at
## http://www.apache.org/licenses/LICENSE-2.0
###############################################################################
source host-config
rpmdir=${1:-"/root/workspace/rpm/"}
rpmpat="kernel-4.1*.rpm"
config_grub () {
key=$1
val=$2
if grep '[" ]'${key} /etc/default/grub > /dev/null ; then
sed -i 's/\([" ]\)'${key}'=[^ "]*/\1'${key}'='${val}'/' /etc/default/grub
else
sed -i 's/GRUB_CMDLINE_LINUX="\(.*\)"/GRUB_CMDLINE_LINUX="\1 '${key}'='${val}'"/' /etc/default/grub
fi
}
# The script's caller should passing the rpm directory that is built out from
# build.sh. The default rpmdir is the one used by yardstick scripts.
install_kernel () {
# Install the kernel rpm
filenum=`ls -l ${rpmdir}/${rpmpat} |wc -l`
if [ $filenum -eq 0 ]
then
echo "No kernel rpm found in workspace/rpm"
exit 1
elif [ $filenum -gt 1 ]
then
echo "Multiple kernel rpm found in workspace/rpm"
exit 1
else
krpm=`find "${rpmdir}" -name "${rpmpat}"`
rpm -ihv $krpm
fi
}
# Isolate CPUs from the general scheduler
config_grub 'isolcpus' ${host_isolcpus}
# Stop timer ticks on isolated CPUs whenever possible
config_grub 'nohz_full' ${host_isolcpus}
# Do not call RCU callbacks on isolated CPUs
config_grub 'rcu_nocbs' ${host_isolcpus}
# Enable intel iommu driver and disable DMA translation for devices
config_grub 'iommu' 'pt'
config_grub 'intel_iommu' 'on'
# Set HugeTLB pages to 1GB
config_grub 'default_hugepagesz' '1G'
config_grub 'hugepagesz' '1G'
# Disable machine check
config_grub 'mce' 'off'
## Use polling idle loop to improve performance
config_grub 'idle' 'poll'
## Disable clocksource verification at runtime
config_grub 'tsc' 'reliable'
sed -i s/GRUB_DEFAULT=saved/GRUB_DEFAULT=0/ /etc/default/grub
grub2-mkconfig -o /boot/grub2/grub.cfg
install_kernel
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