modules-mem-test.sh

#!/bin/sh
# License: CC0

MODULESFILE="$1"

MODULESDIR="/lib/modules/4.4.102"
NUMRUNS=30

drop_caches() {
	/usr/lib/autoupdater/download.d/95drop_caches > /dev/null
}

get_normal_free() {
	free | grep "^Mem:" | awk '{ print $4 }'
}

get_caches_free() {
	free | grep "cache:" | awk '{ print $4 }'
}

[ ! -f "$MODULESFILE" ] && {
	echo "Modules file $MODULESFILE does not exist"
	exit 1
}

unload_modules() {
	while read m; do
		[ -z "$m" ] && continue

		rmmod "$MODULESDIR/$m.ko" || echo "Unloading $m failed" >&2
	done < $MODULESFILE
}

load_modules() {
	__tac "$MODULESFILE" | while read m; do
		[ -z "$m" ] && continue

		insmod "$MODULESDIR/$m.ko" || echo "Loading $m failed" >&2
	done
}

__tac() {
	awk '{a[i++]=$0} END {for (j=i-1; j>=0;) print a[j--] }' "$1"
}

run() {
	drop_caches
	sleep 10
	drop_caches
	startnf=`get_normal_free`
	startcf=`get_caches_free`

	unload_modules

	drop_caches
	sleep 10
	drop_caches
	unloadnf=`get_normal_free`
	unloadcf=`get_caches_free`

	load_modules	

	drop_caches
	sleep 10
	drop_caches
	loadnf=`get_normal_free`
	loadcf=`get_caches_free`

	diffnf1=$(($unloadnf-$startnf))
	diffnf2=$(($unloadnf-$loadnf))
	diffnf3=$((($diffnf1+$diffnf2)/2))

	diffcf1=$(($unloadcf-$startcf))
	diffcf2=$(($unloadcf-$loadcf))
	diffcf3=$((($diffcf1+$diffcf2)/2))

	diffsumnf=$(($diffsumnf+diffnf3))
	diffsumcf=$(($diffsumcf+diffcf3))

	echo "normal-free: $startnf $unloadnf $loadnf $diffnf1 $diffnf2 $diffnf3"
	echo "cache-free: $startcf $unloadcf $loadcf $diffcf1 $diffcf2 $diffcf3"
}


diffsumnf=0
diffsumcf=0
load_modules 2> /dev/null

echo "# normal-free|caches-free: start unload load (unload-start) (unload-load) (((unload-start)+(unload-load)) / 2)"
sleep 15

for i in `seq 1 $NUMRUNS`; do
	run
done

diffavenf=$(($diffsumnf/$NUMRUNS))
diffavecf=$(($diffsumcf/$NUMRUNS))

echo -e "\nAverage: $diffavenf/$diffavecf KB normal-free/caches-free diff"

net-to-unload.txt

ebt_802_3
ebt_among
ebt_arpreply
ebt_dnat
ebt_limit
ebt_mark
ebt_mark_m
ebt_pkttype
ebt_redirect
ebt_snat
ebt_stp
ebt_vlan
ebtable_broute

nf_conntrack_rtcache
nf_log_ipv4
nf_log_ipv6
nf_log_common

xt_CT
xt_LOG
xt_REDIRECT
xt_addrtype
xt_mac
xt_mark
xt_multiport
xt_physdev
xt_pkttype
xt_quota
xt_state
xt_time

nf_nat_redirect
br_netfilter
ip_tunnel
dummy

sch_codel
sch_dsmark
sch_fq
sch_gred
sch_hfsc
sch_htb
sch_ingress
sch_pie
sch_prio
sch_red
sch_sfq
sch_tbf
sch_teql

act_ipt
act_mirred
act_police
act_skbedit
cls_basic
cls_flow
cls_fw
cls_route
cls_tcindex
cls_u32
em_cmp
em_meta
em_nbyte
em_text
em_u32

usb-to-unload.txt

usb-storage
usbserial
usbnet
ledtrig-usbport
ehci-platform
ehci-hcd
usbcore
usb-common