rt_throttle_2proc_test.sh

#!/bin/bash

function cleanup {
    echo "Exiting script, killing child processes..."
    kill $pid1 $pid2
    exit 1
}

trap cleanup EXIT

while true; do
    # Spawn first process with real-time priority and pin to CPU 2
    taskset -c 2 chrt -f 99 sh -c 'while true; do :; done' &

    # Get the process ID of the first process
    pid1=$!

    # Set real-time priority for first process
    chrt -f -p 99 $pid1

    # Spawn second process with real-time priority and pin to CPU 2
    taskset -c 2 chrt -f 99 sh -c 'while true; do :; done' &

    # Get the process ID of the second process
    pid2=$!

    # Set real-time priority for second process
    chrt -f -p 99 $pid2

    # Wait for a few seconds to let the processes run
    sleep 5

    # Check if each process used at most 90% of CPU time
    cpu_usage1=$(ps -p $pid1 -o %cpu | awk 'NR>1 {print $1}')
    cpu_usage2=$(ps -p $pid2 -o %cpu | awk 'NR>1 {print $1}')
    if (( $(echo "$cpu_usage1 <= 96.0" | bc -l) )) && (( $(echo "$cpu_usage2 <= 96.0" | bc -l) )); then
        echo "Success: Process 1 CPU usage = $cpu_usage1%, Process 2 CPU usage = $cpu_usage2%"
    else
        echo "Error: Process 1 CPU usage = $cpu_usage1%, Process 2 CPU usage = $cpu_usage2%"
    fi

    # Kill both processes and start over
    kill $pid1 $pid2
done