#!/usr/bin/env bash
# SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
# SPDX-License-Identifier: Apache-2.0

dnf -y --refresh install \
    tuned-utils \
    tuned-profiles-realtime

# Isolate half of the available cores by default
if [ -z "${ISOLATED_CORES}" ]; then
    PROC=$(nproc)
    ISOLATED_CORES=
    if ((PROC > 4)); then
        ISOLATED_CORES+=$(seq -s, $((PROC/2)) $((PROC-1)))
    fi
fi
echo isolated_cores=${ISOLATED_CORES} >> /etc/tuned/realtime-variables.conf

# Enable dynamic preemption
grubby --update-kernel=ALL --remove-args="preempt=full"

# Select real-time tuned profile
tuned-adm profile realtime