useful for testing "streaming" file writes and watching cpu usage in htop

test-writes.sh

#!/bin/bash
#
# `msleep` is available at https://github.com/coolaj86/msleep-commandline

SIZE=${1}
LOCATION=${2}
DATFILE=~/data.tmp
if [ ! -n "${SIZE}" ]
then
  SIZE=512K
fi
if [ ! -n "${LOCATION}" ]
then
  LOCATION=/dev/shm
fi

dd if=/dev/zero of=${DATFILE} bs=${SIZE} count=1
while true
do
  msleep 128
  cp ${DATFILE} ${LOCATION}
done