1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0+ 3# 4# Start up the specified number of jitter.sh scripts in the background. 5# 6# Usage: . jitterstart.sh n jittering-dir duration [ sleepmax [ spinmax ] ] 7# 8# n: Number of jitter.sh scripts to start up. 9# jittering-dir: Directory in which to put "jittering" file. 10# duration: Time to run in seconds. 11# sleepmax: Maximum microseconds to sleep, defaults to one second. 12# spinmax: Maximum microseconds to spin, defaults to one millisecond. 13# 14# Copyright (C) 2021 Facebook, Inc. 15# 16# Authors: Paul E. McKenney <paulmck@kernel.org> 17 18jitter_n=$1 19if test -z "$jitter_n" 20then 21 echo jitterstart.sh: Missing count of jitter.sh scripts to start. 22 exit 33 23fi 24jittering_dir=$2 25if test -z "$jittering_dir" 26then 27 echo jitterstart.sh: Missing directory in which to place jittering file. 28 exit 34 29fi 30shift 31shift 32 33touch ${jittering_dir}/jittering 34for ((jitter_i = 1; jitter_i <= $jitter_n; jitter_i++)) 35do 36 jitter.sh $jitter_i "${jittering_dir}/jittering" "$@" & 37done 38