Linux preempt-rt

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#!/bin/sh

busybox=../busybox

i=4000
echo "Before we started $i copies of '$busybox sleep 10':"
$busybox nmeter '%t %[pn] %m' | head -3

while test $i != 0; do
    $busybox sleep 10 &
    i=$((i-1))
done
sleep 1

echo "After:"
$busybox nmeter '%t %[pn] %m' | head -3