#!/bin/bash

#

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# set_host_configuration.sh - set Huge Pages parameters required for memkind tests

set -e

MEMKIND_HUGE_PAGES_NO=3000

MEMKIND_OVERCOMMIT_HUGEPAGES_NO=128

# find out current configuration

MEMKIND_HUGE_PAGES_FOUND=$(cat /proc/sys/vm/nr_hugepages)

MEMKIND_OVERCOMMIT_HUGEPAGES_FOUND=$(cat /proc/sys/vm/nr_overcommit_hugepages)

# set expected configuration

if [ "$MEMKIND_HUGE_PAGES_FOUND" != "$MEMKIND_HUGE_PAGES_NO" ]; then

    echo "Setting number of hugepages to ${MEMKIND_HUGE_PAGES_NO}."

    sudo sysctl vm.nr_hugepages="$MEMKIND_HUGE_PAGES_NO"

fi

if [ "$MEMKIND_OVERCOMMIT_HUGEPAGES_FOUND" != "$MEMKIND_OVERCOMMIT_HUGEPAGES_NO" ]; then

    echo "Setting number of overcommit hugepages to ${MEMKIND_OVERCOMMIT_HUGEPAGES_NO}."

    sudo sysctl vm.nr_overcommit_hugepages="$MEMKIND_OVERCOMMIT_HUGEPAGES_NO"

fi