uksmstat-max

#!/bin/lksh
sleep=5
cycle=10
oldmemuse=0
if [ -f /dev/shm/uksm.maxmemuse ]; then
    read maxmemuse < /dev/shm/uksm.maxmemuse
else
    maxmemuse=0
fi
while : ; do
    read memuse < /sys/kernel/mm/uksm/pages_sharing
    while read -r line
	do
	    if [ "${line%:*}" = "KsmZeroPages" ]; then
		ksmzero=${line//[a-zA-Z:]/}
		break
	    fi
	done < /proc/meminfo
    shareplususe=$(($memuse * 4096 + ${ksmzero//[a-zA-Z:]/} * 1024 ))
    if [ $shareplususe -gt $maxmemuse ]; then
	maxmemuse=$shareplususe
	echo $maxmemuse > /dev/shm/uksm.maxmemuse
    fi
    if [ $cycle -eq 10 ] ; then
	memuse=$(numfmt --to=iec-i --suffix=B --padding=6 $shareplususe )
	if [ ! "$memuse" = "$oldmemuse" ]; then
	    read scanpages < /sys/kernel/mm/uksm/pages_scanned
	    scanpages=$(numfmt --to=si --padding=5 $scanpages )
	    maxmemuseb=$(numfmt --to=iec-i --suffix=B --padding=6 $maxmemuse)
	    echo `date +%T` "sharing+zero: $memuse ($maxmemuseb), pages_scanned:$scanpages"
	    oldmemuse=$memuse
	fi
	cycle=0
    fi
    sleep $sleep
    ((cycle++))
done