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# /etc/systemd/system/boot-performance-tuning.service
# run 'systemctl daemon-reload' after installing, then 'systemctl enable boot-performance-tuning'

[Unit]
Description=PBP Performance Tuning
After=basic.target

[Service]
Type=oneshot
ExecStart=/usr/local/sbin/performance-tuning.sh

[Install]
WantedBy=multi-user.target

#!/bin/bash
# /usr/local/sbin/performance-tuning.sh

# zfs-initramfs defaults to mounting the rootfs "relatime" regardless of dataset properties
mount -o remount,noatime /

echo 1 > /sys/devices/system/cpu/cpufreq/policy0/interactive/io_is_busy 
echo 1 > /sys/devices/system/cpu/cpufreq/policy4/interactive/io_is_busy 

# gpu & vop on cpu5 (big)
for i in $(awk -F':' '/gpu/{print $1}' </proc/interrupts | sed 's/\ //g'); do
    echo 5 >/proc/irq/$i/smp_affinity_list
done
for i in $(awk -F':' '/vop/{print $1}' </proc/interrupts | sed 's/\ //g'); do
    echo 5 >/proc/irq/$i/smp_affinity_list
done

# pcie on cpu4 (big)
for i in $(awk -F':' 'tolower($0) ~ /pcie/{print $1}' </proc/interrupts | sed 's/\ //g'); do
    echo 4 >/proc/irq/$i/smp_affinity_list
done

# mmc on cpu3
for i in $(awk -F':' '/mmc1/{print $1}' </proc/interrupts | sed 's/\ //g'); do
    echo 3 >/proc/irq/$i/smp_affinity_list
done
# usb3 on cpu3
for i in $(awk -F':' '/xhci/{print $1}' </proc/interrupts | sed 's/\ //g'); do
    echo 3 >/proc/irq/$i/smp_affinity_list
done
# dw-mci on cpu2
for i in $(awk -F':' '/dw-mci/{print $1}' </proc/interrupts | sed 's/\ //g'); do
    echo 2 >/proc/irq/$i/smp_affinity_list
done
# usb on cpu1
for i in $(awk -F':' '/ehci/{print $1}' </proc/interrupts | sed 's/\ //g'); do
    echo 1 >/proc/irq/$i/smp_affinity_list
done
for i in $(awk -F':' '/ohci/{print $1}' </proc/interrupts | sed 's/\ //g'); do
    echo 1 >/proc/irq/$i/smp_affinity_list
done

# everything else defaults to cpu0