mirror of
https://github.com/PaperMC/Paper.git
synced 2024-11-22 15:17:17 +01:00
e6faa36eb9
Mojang precaches every single potential rewrite rule that could ever exist on server startup. This includes rules from all the way back to versions from 6+ years ago. This is the source of why the server hogs every CPU core at 100% every start. For anyone who hard resets for updates or has force upgraded their entire world, this results in completely wasted cpu cycles. This massive CPU usage also delays server startup time. We improve this by making "min version to precache" that defaults to a future version so that no rewrite rules are precached. someone who expects to be converting a lot chunks could theoretically set -DPaper.minPrecachedDatafixVersion=<dataVersionConvertingFrom> as a startup parameter and only build from that point on. However this will likely never be needed as the server will still run the same cache logic on demand when it's actually needed. The only cost would be some delay on the FIRST chunk conversion, but paper already runs chunk conversions on another thread so this will likely never be a concern for TPS. This patch will significantly reduce CPU use on startup, reduce memory usage, and improve server startup time.
120 lines
4 KiB
Bash
Executable file
120 lines
4 KiB
Bash
Executable file
#!/usr/bin/env bash
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(
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set -e
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nms="net/minecraft/server"
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export MODLOG=""
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PS1="$"
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basedir="$(cd "$1" && pwd -P)"
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source "$basedir/scripts/functions.sh"
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gitcmd="git -c commit.gpgsign=false"
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workdir="$basedir/work"
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minecraftversion=$(cat "$workdir/BuildData/info.json" | grep minecraftVersion | cut -d '"' -f 4)
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decompiledir="$workdir/Minecraft/$minecraftversion/forge"
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# replace for now
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decompiledir="$workdir/Minecraft/$minecraftversion/spigot"
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export importedmcdev=""
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function import {
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export importedmcdev="$importedmcdev $1"
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file="${1}.java"
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target="$workdir/Spigot/Spigot-Server/src/main/java/$nms/$file"
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base="$decompiledir/$nms/$file"
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if [[ ! -f "$target" ]]; then
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export MODLOG="$MODLOG Imported $file from mc-dev\n";
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#echo "Copying $base to $target"
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cp "$base" "$target" || exit 1
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else
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echo "UN-NEEDED IMPORT: $file"
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fi
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}
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function importLibrary {
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group=$1
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lib=$2
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prefix=$3
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shift 3
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for file in "$@"; do
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file="$prefix/$file"
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target="$workdir/Spigot/Spigot-Server/src/main/java/${file}"
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targetdir=$(dirname "$target")
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mkdir -p "${targetdir}"
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base="$workdir/Minecraft/$minecraftversion/libraries/${group}/${lib}/$file"
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if [ ! -f "$base" ]; then
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echo "Missing $base"
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exit 1
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fi
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export MODLOG="$MODLOG Imported $file from $lib\n";
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sed 's/\r$//' "$base" > "$target" || exit 1
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done
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}
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(
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cd "$workdir/Spigot/Spigot-Server/"
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lastlog=$($gitcmd log -1 --oneline)
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if [[ "$lastlog" = *"mc-dev Imports"* ]]; then
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$gitcmd reset --hard HEAD^
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fi
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)
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files=$(cat "$basedir/Spigot-Server-Patches/"* | grep "+++ b/src/main/java/net/minecraft/server/" | sort | uniq | sed 's/\+\+\+ b\/src\/main\/java\/net\/minecraft\/server\///g' | sed 's/.java//g')
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nonnms=$(grep -R "new file mode" -B 1 "$basedir/Spigot-Server-Patches/" | grep -v "new file mode" | grep -oE "net\/minecraft\/server\/.*.java" | grep -oE "[A-Za-z]+?.java$" --color=none | sed 's/.java//g')
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function containsElement {
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local e
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for e in "${@:2}"; do
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[[ "$e" == "$1" ]] && return 0;
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done
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return 1
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}
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set +e
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for f in $files; do
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containsElement "$f" ${nonnms[@]}
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if [ "$?" == "1" ]; then
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if [ ! -f "$workdir/Spigot/Spigot-Server/src/main/java/net/minecraft/server/$f.java" ]; then
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if [ ! -f "$decompiledir/$nms/$f.java" ]; then
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echo "$(color 1 31) ERROR!!! Missing NMS$(color 1 34) $f $(colorend)";
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else
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import $f
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fi
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fi
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fi
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done
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########################################################
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########################################################
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########################################################
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# NMS IMPORTS
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# Temporarily add new NMS dev imports here before you run paper patch
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# but after you have paper rb'd your changes, remove the line from this file before committing.
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# we do not need any lines added to this file for NMS
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# import FileName
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########################################################
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########################################################
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########################################################
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# LIBRARY IMPORTS
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# These must always be mapped manually, no automatic stuff
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#
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# # group # lib # prefix # many files
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# dont forget \ at end of each line but last
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importLibrary com.mojang authlib com/mojang/authlib yggdrasil/YggdrasilGameProfileRepository.java
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importLibrary com.mojang datafixerupper com/mojang/datafixers DataFixerBuilder.java
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importLibrary com.mojang datafixerupper com/mojang/datafixers/util Either.java
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importLibrary com.mojang datafixerupper com/mojang/serialization/codecs KeyDispatchCodec.java
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########################################################
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########################################################
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########################################################
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set -e
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cd "$workdir/Spigot/Spigot-Server/"
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rm -rf nms-patches applyPatches.sh makePatches.sh >/dev/null 2>&1
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$gitcmd add . -A >/dev/null 2>&1
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echo -e "mc-dev Imports\n\n$MODLOG" | $gitcmd commit . -F -
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)
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