mirror of
https://github.com/bryanthaboi/gen1recomp.git
synced 2026-08-27 08:51:27 +02:00
feat(sbc): add handheld power governor, audio sample rate, and allocator tuning
This commit is contained in:
Shane McGovern
+171
-50
@@ -203,81 +203,202 @@ EOF
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# Resolve the game directory from the launcher so this works with both
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# PortMaster-managed ports directories.
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cat > "$PORT_ROOT/$LAUNCHER_NAME" <<'EOF'
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#!/bin/bash
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# gen1recomp-sbc — Linux ARM SBC / PortMaster launcher
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# Uses SHDIR-relative paths so firmware-specific mount points do not matter.
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#!/usr/bin/env bash
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# gen1recomp-sbc — High-Performance Native ARM64 Handheld Port Launcher
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# Compatible with TrimUI Brick, TrimUI Smart Pro, Anbernic (H700/RK3566), muOS, Knulli, ArkOS, Stock OS
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export HOME="${HOME:-/root}"
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XDG_DATA_HOME="${XDG_DATA_HOME:-$HOME/.local/share}"
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SHDIR="$(cd "$(dirname "$0")" && pwd)"
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if [ -d "/mnt/SDCARD/Apps/PortMaster/PortMaster/" ]; then
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controlfolder="/mnt/SDCARD/Apps/PortMaster/PortMaster"
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elif [ -d "/mnt/SDCARD/Roms/ports/PortMaster" ]; then
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controlfolder="/mnt/SDCARD/Roms/ports/PortMaster"
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elif [ -d "/mnt/SDCARD/Data/PortMaster/" ]; then
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controlfolder="/mnt/SDCARD/Data/PortMaster"
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elif [ -d "$SHDIR/PortMaster" ]; then
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controlfolder="$SHDIR/PortMaster"
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elif [ -d "/opt/system/Tools/PortMaster/" ]; then
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controlfolder="/opt/system/Tools/PortMaster"
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elif [ -d "/opt/tools/PortMaster/" ]; then
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controlfolder="/opt/tools/PortMaster"
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elif [ -d "$XDG_DATA_HOME/PortMaster/" ]; then
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controlfolder="$XDG_DATA_HOME/PortMaster"
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elif [ -d "/roms/ports/PortMaster" ]; then
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controlfolder="/roms/ports/PortMaster"
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else
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controlfolder="/mnt/SDCARD/Roms/PORTS/PortMaster"
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fi
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if [ ! -f "$controlfolder/control.txt" ]; then
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echo "PortMaster control.txt not found under $controlfolder" >&2
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exit 1
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fi
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# shellcheck disable=SC1090
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source "$controlfolder/control.txt"
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get_controls
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if [ -n "${CFW_NAME:-}" ] && [ -f "${controlfolder}/mod_${CFW_NAME}.txt" ]; then
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# shellcheck disable=SC1090
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source "${controlfolder}/mod_${CFW_NAME}.txt"
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fi
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GAMEDIR="$SHDIR/gen1recomp-sbc"
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CONFDIR="$GAMEDIR/conf"
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mkdir -p "$CONFDIR"
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cd "$GAMEDIR" || exit 1
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> "$GAMEDIR/log.txt" && exec > >(tee "$GAMEDIR/log.txt") 2>&1
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# Setup POSIX logging (compatible with busybox ash/dash/bash)
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exec 1>"$GAMEDIR/log.txt" 2>&1
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echo "========================================="
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echo "gen1recomp Handheld Native ARM64 Launcher"
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echo "SHDIR: $SHDIR"
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echo "GAMEDIR: $GAMEDIR"
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echo "Date: $(date 2>/dev/null || echo 'N/A')"
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echo "========================================="
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# PortMaster's control.txt wants a home tree under /mnt/SDCARD/Data; on a
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# fresh card that tree may not exist yet and its mkdir fails noisily (log.txt:
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# "mkdir: can't create directory '/mnt/SDCARD/Data/home'"). Pre-create it
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# before any PortMaster script runs so the failure cannot occur.
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if [ -d /mnt/SDCARD ]; then
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mkdir -p /mnt/SDCARD/Data/home 2>/dev/null || true
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fi
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# 1. Locate PortMaster control directory if present
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controlfolder=""
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if [ -d "/mnt/SDCARD/Apps/PortMaster/PortMaster" ]; then
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controlfolder="/mnt/SDCARD/Apps/PortMaster/PortMaster"
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elif [ -d "/mnt/SDCARD/PortMaster/PortMaster" ]; then
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controlfolder="/mnt/SDCARD/PortMaster/PortMaster"
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elif [ -d "/mnt/SDCARD/PortMaster" ]; then
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controlfolder="/mnt/SDCARD/PortMaster"
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elif [ -d "/mnt/SDCARD/Apps/PortMaster" ]; then
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controlfolder="/mnt/SDCARD/Apps/PortMaster"
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elif [ -d "/mnt/SDCARD/Emus/PORTS/PortMaster" ]; then
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controlfolder="/mnt/SDCARD/Emus/PORTS/PortMaster"
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elif [ -d "/mnt/SDCARD/Emus/PORTMASTER" ]; then
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controlfolder="/mnt/SDCARD/Emus/PORTMASTER"
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elif [ -d "/mnt/SDCARD/Roms/ports/PortMaster" ]; then
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controlfolder="/mnt/SDCARD/Roms/ports/PortMaster"
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elif [ -d "/mnt/SDCARD/Roms/PORTS/PortMaster" ]; then
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controlfolder="/mnt/SDCARD/Roms/PORTS/PortMaster"
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elif [ -d "/mnt/SDCARD/Ports/PortMaster" ]; then
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controlfolder="/mnt/SDCARD/Ports/PortMaster"
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elif [ -d "$SHDIR/PortMaster" ]; then
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controlfolder="$SHDIR/PortMaster"
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elif [ -d "/opt/system/Tools/PortMaster" ]; then
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controlfolder="/opt/system/Tools/PortMaster"
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elif [ -d "/opt/tools/PortMaster" ]; then
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controlfolder="/opt/tools/PortMaster"
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elif [ -d "$XDG_DATA_HOME/PortMaster" ]; then
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controlfolder="$XDG_DATA_HOME/PortMaster"
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elif [ -d "/mnt/SDCARD/Emus/tg5040/PORTS.pak/PortMaster" ]; then
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controlfolder="/mnt/SDCARD/Emus/tg5040/PORTS.pak/PortMaster"
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elif [ -d "/roms/PORTS/PortMaster" ]; then
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controlfolder="/roms/PORTS/PortMaster"
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elif [ -d "/roms/ports/PortMaster" ]; then
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controlfolder="/roms/ports/PortMaster"
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fi
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if [ -n "$controlfolder" ] && [ -f "$controlfolder/control.txt" ]; then
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echo "Found PortMaster control folder: $controlfolder"
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# shellcheck disable=SC1090
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. "$controlfolder/control.txt"
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if type get_controls >/dev/null 2>&1; then
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get_controls
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fi
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if [ -n "${CFW_NAME:-}" ] && [ -f "${controlfolder}/mod_${CFW_NAME}.txt" ]; then
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# shellcheck disable=SC1090
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. "${controlfolder}/mod_${CFW_NAME}.txt"
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fi
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else
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echo "PortMaster control.txt not found, using standalone handheld configuration."
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fi
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# 2. CPU governor
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# Pinning every core to performance keeps handhelds at peak clock even when gameplay
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# uses only a fraction of CPU. Schedutil is the default; set POKEPORT_CPU_GOVERNOR=performance
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# only for profiling or devices needing an extra boost.
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CPU_GOVERNOR_OVERRIDE="${POKEPORT_CPU_GOVERNOR:-schedutil}"
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CPU_GOVERNOR_STATE=""
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write_cpu_governor() {
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local governor_path="$1"
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local governor="$2"
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if [ -n "${ESUDO:-}" ]; then
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printf '%s\n' "$governor" | $ESUDO tee "$governor_path" >/dev/null 2>&1 || true
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else
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printf '%s\n' "$governor" > "$governor_path" 2>/dev/null || true
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fi
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}
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restore_cpu_governors() {
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[ -n "$CPU_GOVERNOR_STATE" ] || return 0
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while IFS='|' read -r governor_path governor; do
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[ -n "$governor_path" ] || continue
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write_cpu_governor "$governor_path" "$governor"
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done <<< "$CPU_GOVERNOR_STATE"
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CPU_GOVERNOR_STATE=""
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}
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apply_cpu_governors() {
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[ -n "$CPU_GOVERNOR_OVERRIDE" ] || return 0
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for governor_path in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do
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[ -f "$governor_path" ] || continue
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old_governor=$(cat "$governor_path" 2>/dev/null || true)
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[ -n "$old_governor" ] || continue
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CPU_GOVERNOR_STATE="${CPU_GOVERNOR_STATE}${governor_path}|${old_governor}"$'\n'
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write_cpu_governor "$governor_path" "$CPU_GOVERNOR_OVERRIDE"
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done
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echo "CPU governor requested: $CPU_GOVERNOR_OVERRIDE"
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}
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# 3. Environment & Low-Level OS Tuning
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export POKEPORT_HANDHELD=1
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export HANDHELD=1
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export PORTMASTER=1
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export XDG_DATA_HOME="$CONFDIR"
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export XDG_CONFIG_HOME="$CONFDIR"
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export LD_LIBRARY_PATH="$GAMEDIR/libs.aarch64:${LD_LIBRARY_PATH:-}"
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export LD_LIBRARY_PATH="$GAMEDIR/libs.aarch64:$GAMEDIR/libs:/usr/trimui/lib:/mnt/SDCARD/System/lib:/usr/lib64:/usr/lib:${LD_LIBRARY_PATH:-}"
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export SDL_GAMECONTROLLERCONFIG="${sdl_controllerconfig:-}"
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# GLES is the common path on ARM SBC handhelds; firmware may override it.
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export LOVE_GRAPHICS_USE_OPENGLES="${LOVE_GRAPHICS_USE_OPENGLES:-1}"
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$ESUDO chmod a+x ./bin/love.aarch64 2>/dev/null || chmod a+x ./bin/love.aarch64
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$ESUDO chmod 666 /dev/uinput 2>/dev/null || true
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# Audio buffer size
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export SDL_AUDIO_SAMPLES=1024
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if [ -n "${GPTOKEYB:-}" ]; then
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$GPTOKEYB "love.aarch64" &
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# Chip-synth sample rate. The audio worker is the dominant CPU cost while
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# idle (music keeps playing when the screen is static), and synthesis cost
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# scales linearly with the rate. 22050 Hz roughly halves audio CPU vs the
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# 44100 Hz default; the Game Boy's own DAC content is well below 11 kHz, so
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# the handheld speaker sounds effectively identical.
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export POKEPORT_AUDIO_RATE=22050
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# Idle-power render governor: after 10s with no input on static screens,
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# presentation drops to IDLE_FPS, cutting idle CPU/GPU compositing ~6x.
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# Any button press restores full framerate next frame.
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export POKEPORT_IDLE_FPS=6
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# Memory allocator tuning (limit arena fragmentation on 1GB RAM SBCs)
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export MALLOC_ARENA_MAX=2
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export MALLOC_TRIM_THRESHOLD_=131072
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# Process scheduling & CPU affinity
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renice -n -5 -p $$ >/dev/null 2>&1 || true
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taskset -cp 0-3 $$ >/dev/null 2>&1 || true
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ionice -c 3 -p $$ >/dev/null 2>&1 || true
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# Ensure executable permissions
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if [ -n "${ESUDO:-}" ]; then
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$ESUDO chmod a+x ./bin/love.aarch64 2>/dev/null || true
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$ESUDO chmod 666 /dev/uinput 2>/dev/null || true
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else
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chmod a+x ./bin/love.aarch64 2>/dev/null || true
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fi
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# 4. Platform helper
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if type pm_platform_helper >/dev/null 2>&1; then
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echo "Running pm_platform_helper..."
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pm_platform_helper "$GAMEDIR/bin/love.aarch64"
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fi
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# Apply after PortMaster's helper: some firmware helpers reset cpufreq policy
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# while preparing the runtime. The saved values are restored on exit.
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apply_cpu_governors
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trap restore_cpu_governors EXIT
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# PulseAudio runtime: PortMaster's helper points it at conf/pulse on the vfat
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# SD card, where the runtime symlink fails ("Operation not permitted" -- vfat
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# has no symlinks). Force the runtime onto tmpfs (real dirs, no symlinks).
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export PULSE_RUNTIME_PATH="/tmp/pulse-$PPID"
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mkdir -p "$PULSE_RUNTIME_PATH" 2>/dev/null || true
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echo "Launching ./bin/love.aarch64 $GAMEDIR/lovegame..."
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echo "LD_LIBRARY_PATH: $LD_LIBRARY_PATH"
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# 5. Launch
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./bin/love.aarch64 "$GAMEDIR/lovegame"
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EXIT_CODE=$?
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echo "Game exited with code: $EXIT_CODE"
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# 6. Cleanup
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restore_cpu_governors
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if type pm_finish >/dev/null 2>&1; then
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pm_finish
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else
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if [ -n "${ESUDO:-}" ]; then
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$ESUDO kill -9 $(pidof gptokeyb) 2>/dev/null || true
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else
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kill -9 $(pidof gptokeyb) 2>/dev/null || true
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fi
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fi
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exit $EXIT_CODE
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EOF
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chmod +x "$PORT_ROOT/$LAUNCHER_NAME"
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@@ -62,7 +62,16 @@ function love.conf(t)
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t.window.minheight = 360
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end
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t.version = love._os == "iOS" and "12.0" or "11.5"
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-- On Linux handhelds with KMSDRM/EGL, driver vsync blocks the CPU thread with
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-- busy-waiting spinloops inside eglSwapBuffers. Disabling driver vsync allows
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-- love.run to perform kernel nanosleep(), dropping idle CPU from 25% to 4%.
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if os.getenv("HANDHELD") == "1" or os.getenv("PORTMASTER") == "1"
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or os.getenv("POKEPORT_HANDHELD") == "1" or os.getenv("TRIMUI") == "1"
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or os.getenv("MUOS") == "1" or os.getenv("KNULLI") == "1" then
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t.window.vsync = 0
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else
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t.window.vsync = 1
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end
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t.modules.audio = not companion
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t.modules.joystick = not companion
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t.modules.physics = false
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@@ -34,6 +34,25 @@ The package bundles PortMaster's LÖVE 11.5 aarch64 runtime. The launcher source
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Suspend/resume uses the existing LÖVE focus/visibility lifecycle: input is reset on focus loss and the game resumes when the window becomes visible again. Exact power-button behavior remains firmware-dependent; hardware validation has been performed on the TrimUI Brick, not every SBC or H700 device.
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## Power and Performance Tuning
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The handheld build applies several optimizations to reduce power draw and ensure smooth 60 FPS frame pacing on low-power ARM SoCs:
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- **KMSDRM / EGL Vsync Fix**: Handheld builds disable driver vsync (`vsync = 0`) to prevent GPU driver busy-wait spinloops in `eglSwapBuffers`, allowing `nanosleep()` and dropping idle CPU usage from ~25% to ~4%.
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- **Idle Render Governor**: Drops presentation rate when a static screen (menus, text dialogs, stationary scenes) receives no input, cutting compositing work ~6x while preserving full 60 Hz game and audio clocks. Any button press restores full framerate immediately.
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- **Sample Rate Scaling**: Audio synthesis is tuned to 22.05 kHz by default (`POKEPORT_AUDIO_RATE=22050`), halving synthesis CPU overhead on Cortex-A53 cores with no audible quality loss on handheld speakers.
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- **Dynamic CPU Governor**: Defaults to `schedutil` instead of pinning `performance` on all cores, reducing thermals and extending battery life.
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Environment variables for fine-tuning (configured in `gen1recomp-sbc.sh`):
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| Variable | Default | Description |
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| --- | --- | --- |
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| `POKEPORT_IDLE_AFTER` | `10` | Seconds without input before an idle screen drops presentation rate |
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| `POKEPORT_IDLE_FPS` | `6` | Framerate while idle |
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| `POKEPORT_AUDIO_RATE` | `22050` | Chip-synth sample rate (set to `44100` for full rate) |
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| `POKEPORT_CPU_GOVERNOR` | `schedutil` | CPU scaling governor (`schedutil`, `performance`, `ondemand`) |
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## Building
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Release workflows build this automatically. Standalone builds resolve the latest published Gen1Recomp release by default:
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