Zram test script (quick & dirty)

#!/bin/bash
#modprobe zram

totalmem=$(free | grep -e "^Mem:" | sed -e 's/^Mem: *//' -e 's/  *.*//')
# use all available physical memory
zram_mem=$(( totalmem * 1024 ))
echo $zram_mem > /sys/block/zram0/disksize

mkfs.ext4 /dev/zram0
mkdir -p /mnt/zram-ext4-test
mount -o nobarrier /dev/zram0 /mnt/zram-ext4-test

# without "-s" bonnie++ will try to use files twice the size of RAM, we use 2/3 of that
# "-u root" is there because the mount above is writable only by root
# "-x 10" means running the bench 10 times; obviously tweakable
bonnie++ -s $((totalmem / 1024 * 2 / 3)) -r 0 -u root -x 10 -q -d /mnt/zram-ext4-test/