#!/bin/sh

mount -t debugfs nodev /sys/kernel/debug/

pagesize=$(( $(LD_SHOW_AUXV=1 /bin/true | awk '/PAGESZ/{print $2}') / 1024 ))
extfrag_threshold=$(cat /proc/sys/vm/extfrag_threshold)

get_extfrag_info() {
    nowtime=$(date +%Y-%m-%d\ %H:%M:%S)
    echo "$nowtime  extfrag_threshold: $extfrag_threshold "
    buddyinfo=$(cat /proc/buddyinfo)
    mb0=$(echo $buddyinfo | awk '{print $5}')
    mb1=$(echo $buddyinfo | awk '{print $6}')
    mb2=$(echo $buddyinfo | awk '{print $7}')
    mb3=$(echo $buddyinfo | awk '{print $8}')
    mb4=$(echo $buddyinfo | awk '{print $9}')
    mb5=$(echo $buddyinfo | awk '{print $10}')
    mb6=$(echo $buddyinfo | awk '{print $11}')
    mb7=$(echo $buddyinfo | awk '{print $12}')
    mb8=$(echo $buddyinfo | awk '{print $13}')
    mb9=$(echo $buddyinfo | awk '{print $14}')
    mb10=$(echo $buddyinfo | awk '{print $15}')
    printf "%-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s\n" \
        "$(((2 << 0) * $pagesize))KB($mb0)" \
        "$(((2 << 1) * $pagesize))KB($mb1)" \
        "$(((2 << 2) * $pagesize))KB($mb2)" \
        "$(((2 << 3) * $pagesize))KB($mb3)" \
        "$(((2 << 4) * $pagesize))KB($mb4)" \
        "$(((2 << 5) * $pagesize))KB($mb5)" \
        "$(((2 << 6) * $pagesize))KB($mb6)" \
        "$(((2 << 7) * $pagesize))KB($mb7)" \
        "$(((2 << 8) * $pagesize))KB($mb8)" \
        "$(((2 << 9) * $pagesize))KB($mb9)" \
        "$(((2 << 10) * $pagesize))KB($mb10)" \

    extfrag_index=$(cat /sys/kernel/debug/extfrag/extfrag_index)
    mi0=$(echo $extfrag_index | awk '{print $5}')
    mi1=$(echo $extfrag_index | awk '{print $6}')
    mi2=$(echo $extfrag_index | awk '{print $7}')
    mi3=$(echo $extfrag_index | awk '{print $8}')
    mi4=$(echo $extfrag_index | awk '{print $9}')
    mi5=$(echo $extfrag_index | awk '{print $10}')
    mi6=$(echo $extfrag_index | awk '{print $11}')
    mi7=$(echo $extfrag_index | awk '{print $12}')
    mi8=$(echo $extfrag_index | awk '{print $13}')
    mi9=$(echo $extfrag_index | awk '{print $14}')
    mi10=$(echo $extfrag_index | awk '{print $15}')
    printf "%-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s\n" \
        $(awk -v mi0=$mi0 'BEGIN{print mi0 * 1000}') \
        $(awk -v mi1=$mi1 'BEGIN{print mi1 * 1000}') \
        $(awk -v mi2=$mi2 'BEGIN{print mi2 * 1000}') \
        $(awk -v mi3=$mi3 'BEGIN{print mi3 * 1000}') \
        $(awk -v mi4=$mi4 'BEGIN{print mi4 * 1000}') \
        $(awk -v mi5=$mi5 'BEGIN{print mi5 * 1000}') \
        $(awk -v mi6=$mi6 'BEGIN{print mi6 * 1000}') \
        $(awk -v mi7=$mi7 'BEGIN{print mi7 * 1000}') \
        $(awk -v mi8=$mi8 'BEGIN{print mi8 * 1000}') \
        $(awk -v mi9=$mi9 'BEGIN{print mi9 * 1000}') \
        $(awk -v mi10=$mi10 'BEGIN{print mi10 * 1000}')
}

while true; do
    get_extfrag_info
    sleep 1
done