[LAU] System Configuration: kernel, CPU frequency, hardware timers

Hi folks, Back in 2012 I scripted some post-installation customization for when I would build a new Linux machine. I suspect that all of what I did is no longer needed for today's systems. I'm writing to see if someone can confirm that. What I did came from these links: https://wiki.linuxaudio.org/wiki/system_configuration#the_kernel https://wiki.linuxaudio.org/wiki/system_configuration#cpu_frequency_scaling https://wiki.linuxaudio.org/wiki/system_configuration#hardware_timers My new system runs the 4.17.17 kernel along with the rest of Fedora-27. What do you think? Do I need to taylor the new machine in the above ways? Thanks! P.S.: My script is below, for the curious. #!/bin/sh # $Id: 36-linux_musicians,v 1.4 2012/11/16 05:56:14 kevinc Exp $ DATE=`date +%F-%T` # http://wiki.linuxmusicians.com/doku.php?id=system_configuration#the_kernel sudo cp /etc/default/grub /etc/default/grub-${DATE} sudo cp /boot/grub2/grub.cfg /boot/grub2/grub.cfg-${DATE} # cp /etc/default/grub grub sudo perl -p -i -e 's/(^GRUB_CMDLINE_LINUX=\"nomodeset.*rhgb) quiet$\"/$1 quiet threadirqs\"/' /etc/default/grub sudo /sbin/grub2-mkconfig -o /boot/grub2/grub.cfg # http://wiki.linuxmusicians.com/doku.php?id=system_configuration#cpu_frequen… # echo -n performance \ # | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor sudo touch /etc/rc.d/rc.local cp /etc/rc.d/rc.local rc.local_cpufreq cat << EOF >> rc.local_cpufreq #!/bin/sh for cpu in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor do echo -n performance > \$cpu done echo 3072 > /sys/class/rtc/rtc0/max_user_freq EOF sudo cp rc.local_cpufreq /etc/rc.d/rc.local sudo chmod 755 /etc/rc.d/rc.local # http://wiki.linuxmusicians.com/doku.php?id=system_configuration#hardware_ti… /bin/rm -f 40-timer-permissions.rules cat << EOF > 40-timer-permissions.rules KERNEL=="rtc0", GROUP="audio" KERNEL=="hpet", GROUP="audio" EOF sudo cp 40-timer-permissions.rules /etc/udev/rules.d/ sudo chmod 644 /etc/udev/rules.d/40-timer-permissions.rules cat << EOF > 60-max-user-freq.conf # High Precision Event Timer for performance audio/MIDI dev.hpet.max-user-freq=3072 EOF sudo cp 60-max-user-freq.conf /etc/sysctl.d/ sudo chmod 644 /etc/sysctl.d/60-max-user-freq.conf cat << EOF > 60-vm.swappiness.conf # Delay start of use of swap partitions vm.swappiness = 10 EOF sudo cp 60-vm.swappiness.conf /etc/sysctl.d/ sudo chmod 644 /etc/sysctl.d/60-vm.swappiness.conf cat << EOF > 93-audio_limits.conf # Increase priority of audio applications # # maximum realtime priority @audio - rtprio 90 # maximum locked-in-memory address space (KB) @audio - memlock 2000000 EOF sudo cp 93-audio_limits.conf /etc/security/limits.d/ sudo chmod 644 /etc/security/limits.d/93-audio_limits.conf exit