Change Process scheduling to Realtime scheduler

chrt_helper.sh

#!/usr/bin/env bash

print_usage() {
        echo "Usage: $( basename $1 ) <process name> <SCHED_FIFO | SCHED_RR> <priority (1-99)>"
}

if [ $# != 3 ]; then
        print_usage $0
        exit 1
fi

process_name=$1
sched_policy=$2
let priority=$3

if [ "$sched_policy" == "SCHED_FIFO" ]; then
	sched_flag="-f"
elif [ "$sched_policy" == "SCHED_RR" ]; then
	sched_flag="-r"
else
        print_usage $0
	exit 2
fi

if [ $priority -lt 1 ] || [ $priority -gt 99 ]
then
        print_usage $0
	exit 3
fi

PIDS=$( ps -e | grep $process_name | grep -o '^[[:space:]]*[[:digit:]]\+\>' )

for i in $PIDS; do
	echo "$1 PID: $i"
	chrt $sched_flag -p $priority $i
done