#!/bin/sh
#
# Print a message every few seconds indicating the number of cycles that
# were able to complete.  Most useful as a "nice -20" process so you can
# count how many CPU cycles are left over after "real" work gets done.
#
name=$1
mypid=$$
count=0

trap 'echo "${name:=spin}: $count"; count=0' USR1

while sleep 10; do
  kill -USR1 $mypid || exit 0
done &

while :; do
  count=$(($count + 1))
done