Gaming with Steam on VENTUNO Q

1#!/bin/sh   
2# VENTUNO Q gaming mode.   
3#   sh gaming-mode.sh          play: set up swap, pin clocks, start Steam, restore on exit   
4#   sudo sh gaming-mode.sh setup   one-time: persistent zram swap   
5#   sudo sh gaming-mode.sh on      max CPU + GPU clocks only   
6#   sudo sh gaming-mode.sh off     normal governors   
7#   sh gaming-mode.sh status   
8set -e   
9GPU=/sys/class/devfreq/3d00000.gpu   
10SELF=$(readlink -f "$0")   
11START_STEAM=/mnt/ssd/fex/steam/start-steam   
12status() {   
13	   for p in /sys/devices/system/cpu/cpufreq/policy*; do   
14	       echo "CPU $(basename $p) [cpus $(cat $p/related_cpus)]: $(cat $p/scaling_governor)  $(($(cat $p/scaling_cur_freq)/1000)) MHz"   
15	   done   
16	   echo "GPU: $(cat $GPU/governor)  $(($(cat $GPU/cur_freq)/1000000)) MHz"   
17	   swapon --show 2>/dev/null || true   
18}   
19steam_running() { pgrep -u "$(id -u)" -f 'Steam/ubuntu12_32/steam( |$)' >/dev/null; }   
20RESTORED=   
21restore() {   
22	   [ -n "$RESTORED" ] && return 0; RESTORED=1   
23	   trap - INT TERM EXIT   
24	   echo "== Leaving gaming mode"   
25	   sudo sh "$SELF" off || echo "warning: run: sudo sh $SELF off"   
26}   
27MODE=${1:-play}; [ $# -gt 0 ] && shift   
28case "$MODE" in   
29play)   
30	   [ "$(id -u)" -eq 0 ] && { echo "Run without sudo"; exit 1; }   
31	   sudo -v   
32	   swapon --show=NAME --noheadings 2>/dev/null | grep -q zram || sudo sh "$SELF" setup   
33	   trap restore EXIT   
34	   trap 'restore; exit 130' INT TERM   
35	   sudo sh "$SELF" on   
36	   if steam_running; then echo "Steam already running."; else "$START_STEAM" "$@" || true; fi   
37	   while steam_running; do sleep 5; done   
38	   restore   
39	   ;;   
40setup)   
41	   apt-get install -y systemd-zram-generator   
42	   cat > /etc/systemd/zram-generator.conf <<'EOF'   
43[zram0]   
44zram-size = ram / 2   
45compression-algorithm = zstd   
46swap-priority = 100   
47EOF   
48	   echo 'vm.swappiness = 150' > /etc/sysctl.d/99-zram-swappiness.conf   
49	   sysctl -q -p /etc/sysctl.d/99-zram-swappiness.conf   
50	   systemctl daemon-reload   
51	   systemctl start systemd-zram-setup@zram0.service   
52	   status   
53	   ;;   
54on)   
55	   for p in /sys/devices/system/cpu/cpufreq/policy*; do echo performance > $p/scaling_governor; done   
56	   echo performance > $GPU/governor   
57	   status   
58	   ;;   
59off)   
60	   for p in /sys/devices/system/cpu/cpufreq/policy*; do echo schedutil > $p/scaling_governor; done   
61	   echo simple_ondemand > $GPU/governor   
62	   status   
63	   ;;   
64status) status ;;   
65*) exit 1 ;;   
66esac