Paper/patches/server/0699-Fix-GameProfileCache-concurrency.patch
Nassim Jahnke 20503beee5
Remove guardian beam render issue workaround
Messing with game time sent to the client isn't worth the trouble whenever it may be used by the client now and in the future for such a small issue. Mojang, plz fix
2022-12-15 14:19:09 +01:00

129 lines
6.2 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Sat, 11 Jul 2020 05:09:28 -0700
Subject: [PATCH] Fix GameProfileCache concurrency
Separate lookup and state access locks prevent lookups
from stalling simple state access/write calls
diff --git a/src/main/java/net/minecraft/server/players/GameProfileCache.java b/src/main/java/net/minecraft/server/players/GameProfileCache.java
index 2456edc11b29a92b1648937cd3dd6a9a05706803..b48650c38751a925b83fb4c19ac02f87cb1bef6e 100644
--- a/src/main/java/net/minecraft/server/players/GameProfileCache.java
+++ b/src/main/java/net/minecraft/server/players/GameProfileCache.java
@@ -62,6 +62,11 @@ public class GameProfileCache {
@Nullable
private Executor executor;
+ // Paper start
+ protected final java.util.concurrent.locks.ReentrantLock stateLock = new java.util.concurrent.locks.ReentrantLock();
+ protected final java.util.concurrent.locks.ReentrantLock lookupLock = new java.util.concurrent.locks.ReentrantLock();
+ // Paper end
+
public GameProfileCache(GameProfileRepository profileRepository, File cacheFile) {
this.profileRepository = profileRepository;
this.file = cacheFile;
@@ -69,6 +74,7 @@ public class GameProfileCache {
}
private void safeAdd(GameProfileCache.GameProfileInfo entry) {
+ try { this.stateLock.lock(); // Paper - allow better concurrency
GameProfile gameprofile = entry.getProfile();
entry.setLastAccess(this.getNextOperation());
@@ -83,6 +89,7 @@ public class GameProfileCache {
if (uuid != null) {
this.profilesByUUID.put(uuid, entry);
}
+ } finally { this.stateLock.unlock(); } // Paper - allow better concurrency
}
@@ -138,17 +145,20 @@ public class GameProfileCache {
// Paper start
public @Nullable GameProfile getProfileIfCached(String name) {
+ try { this.stateLock.lock(); // Paper - allow better concurrency
GameProfileCache.GameProfileInfo entry = this.profilesByName.get(name.toLowerCase(Locale.ROOT));
if (entry == null) {
return null;
}
entry.setLastAccess(this.getNextOperation());
return entry.getProfile();
+ } finally { this.stateLock.unlock(); } // Paper - allow better concurrency
}
// Paper end
public Optional<GameProfile> get(String name) {
String s1 = name.toLowerCase(Locale.ROOT);
+ boolean stateLocked = true; try { this.stateLock.lock(); // Paper - allow better concurrency
GameProfileCache.GameProfileInfo usercache_usercacheentry = (GameProfileCache.GameProfileInfo) this.profilesByName.get(s1);
boolean flag = false;
@@ -164,8 +174,12 @@ public class GameProfileCache {
if (usercache_usercacheentry != null) {
usercache_usercacheentry.setLastAccess(this.getNextOperation());
optional = Optional.of(usercache_usercacheentry.getProfile());
+ stateLocked = false; this.stateLock.unlock(); // Paper - allow better concurrency
} else {
+ stateLocked = false; this.stateLock.unlock(); // Paper - allow better concurrency
+ try { this.lookupLock.lock(); // Paper - allow better concurrency
optional = GameProfileCache.lookupGameProfile(this.profileRepository, name); // Spigot - use correct case for offline players
+ } finally { this.lookupLock.unlock(); } // Paper - allow better concurrency
if (optional.isPresent()) {
this.add((GameProfile) optional.get());
flag = false;
@@ -177,6 +191,7 @@ public class GameProfileCache {
}
return optional;
+ } finally { if (stateLocked) { this.stateLock.unlock(); } } // Paper - allow better concurrency
}
public void getAsync(String username, Consumer<Optional<GameProfile>> consumer) {
@@ -203,6 +218,7 @@ public class GameProfileCache {
}
public Optional<GameProfile> get(UUID uuid) {
+ try { this.stateLock.lock(); // Paper - allow better concurrency
GameProfileCache.GameProfileInfo usercache_usercacheentry = (GameProfileCache.GameProfileInfo) this.profilesByUUID.get(uuid);
if (usercache_usercacheentry == null) {
@@ -211,6 +227,7 @@ public class GameProfileCache {
usercache_usercacheentry.setLastAccess(this.getNextOperation());
return Optional.of(usercache_usercacheentry.getProfile());
}
+ } finally { this.stateLock.unlock(); } // Paper - allow better concurrency
}
public void setExecutor(Executor executor) {
@@ -291,7 +308,7 @@ public class GameProfileCache {
JsonArray jsonarray = new JsonArray();
DateFormat dateformat = GameProfileCache.createDateFormat();
- this.getTopMRUProfiles(org.spigotmc.SpigotConfig.userCacheCap).forEach((usercache_usercacheentry) -> { // Spigot
+ this.listTopMRUProfiles(org.spigotmc.SpigotConfig.userCacheCap).forEach((usercache_usercacheentry) -> { // Spigot // Paper - allow better concurrency
jsonarray.add(GameProfileCache.writeGameProfile(usercache_usercacheentry, dateformat));
});
String s = this.gson.toJson(jsonarray);
@@ -332,8 +349,19 @@ public class GameProfileCache {
}
private Stream<GameProfileCache.GameProfileInfo> getTopMRUProfiles(int limit) {
- return ImmutableList.copyOf(this.profilesByUUID.values()).stream().sorted(Comparator.comparing(GameProfileCache.GameProfileInfo::getLastAccess).reversed()).limit((long) limit);
+ // Paper start - allow better concurrency
+ return this.listTopMRUProfiles(limit).stream();
+ }
+
+ private List<GameProfileCache.GameProfileInfo> listTopMRUProfiles(int limit) {
+ try {
+ this.stateLock.lock();
+ return this.profilesByUUID.values().stream().sorted(Comparator.comparing(GameProfileCache.GameProfileInfo::getLastAccess).reversed()).limit(limit).toList();
+ } finally {
+ this.stateLock.unlock();
+ }
}
+ // Paper end
private static JsonElement writeGameProfile(GameProfileCache.GameProfileInfo entry, DateFormat dateFormat) {
JsonObject jsonobject = new JsonObject();