Safety timings w/ Configurable parallel mode

sources/src/main/java/co/aikar/timings/TimingData.java

@@ -0,0 +1,127 @@
+/*
+ * This file is licensed under the MIT License (MIT).
+ *
+ * Copyright (c) 2014 Daniel Ennis <http://aikar.co>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package co.aikar.timings;
+
+import java.util.List;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.LongAdder;
+
+import static co.aikar.util.JSONUtil.toArray;
+
+/**
+ * Akarin Changes Note
+ * 1) Thread safe timing (safety)
+ */
+/**
+ * <p>Lightweight object for tracking timing data</p>
+ *
+ * This is broken out to reduce memory usage
+ */
+class TimingData {
+    private final int id;
+    private int count = 0;
+    private int lagCount = 0;
+    private long totalTime = 0;
+    private long lagTotalTime = 0;
+    private AtomicInteger curTickCount = new AtomicInteger(); // Akarin
+    private LongAdder curTickTotal = new LongAdder(); // Akarin
+
+    TimingData(int id) {
+        this.id = id;
+    }
+
+    private TimingData(TimingData data) {
+        this.id = data.id;
+        this.totalTime = data.totalTime;
+        this.lagTotalTime = data.lagTotalTime;
+        this.count = data.count;
+        this.lagCount = data.lagCount;
+    }
+
+    void add(long diff) {
+        curTickCount.incrementAndGet();
+        curTickTotal.add(diff);
+    }
+
+    void processTick(boolean violated) {
+        totalTime += curTickTotal.sum();
+        count += curTickCount.get();
+        if (violated) {
+            lagTotalTime += curTickTotal.sum();
+            lagCount += curTickCount.get();
+        }
+        curTickTotal.reset();
+        curTickCount.set(0);
+    }
+
+    void reset() {
+        count = 0;
+        lagCount = 0;
+        curTickTotal.reset();
+        curTickCount.set(0);
+        totalTime = 0;
+        lagTotalTime = 0;
+    }
+
+    protected TimingData clone() {
+        return new TimingData(this);
+    }
+
+    List<Object> export() {
+        List<Object> list = toArray(
+            id,
+            count,
+            totalTime);
+        if (lagCount > 0) {
+            list.add(lagCount);
+            list.add(lagTotalTime);
+        }
+        return list;
+    }
+
+    boolean hasData() {
+        return count > 0;
+    }
+
+    long getTotalTime() {
+        return totalTime;
+    }
+
+    int getCurTickCount() {
+        return curTickCount.get();
+    }
+
+    void setCurTickCount(int curTickCount) {
+        this.curTickCount.getAndSet(curTickCount);
+    }
+
+    long getCurTickTotal() {
+        return curTickTotal.sum();
+    }
+
+    void setCurTickTotal(long curTickTotal) {
+        this.curTickTotal.reset();
+        this.curTickTotal.add(curTickTotal);
+    }
+}

sources/src/main/java/co/aikar/timings/TimingHandler.java

@@ -24,17 +24,20 @@
 package co.aikar.timings;
 
 import co.aikar.util.LoadingIntMap;
+import io.akarin.api.internal.Akari;
 import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
+
 import org.bukkit.Bukkit;
 
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
 import java.util.logging.Level;
 
 /**
  * Akarin Changes Note
- * 1) Make class public (compatibility)
+ * 1) Thread safe timing (safety)
- * 2) Add stopTiming method that accept given start time (compatibility)
  */
-public class TimingHandler implements Timing { // Akarin
+class TimingHandler implements Timing {
 
     private static int idPool = 1;
     final int id = idPool++;
@@ -47,12 +50,12 @@ public class TimingHandler implements Timing { // Akarin
     final TimingData record;
     private final TimingHandler groupHandler;
 
-    private long start = 0;
+    private AtomicLong start = new AtomicLong(); // Akarin
-    private int timingDepth = 0;
+    private AtomicInteger timingDepth = new AtomicInteger(); // Akarin
-    private boolean added;
+    private volatile boolean added; // Akarin
     private boolean timed;
     private boolean enabled;
-    private TimingHandler parent;
+    private volatile TimingHandler parent; // Akarin
 
     TimingHandler(TimingIdentifier id) {
         if (id.name.startsWith("##")) {
@@ -75,16 +78,18 @@ public class TimingHandler implements Timing { // Akarin
     }
 
     void processTick(boolean violated) {
-        if (timingDepth != 0 || record.getCurTickCount() == 0) {
+        if (timingDepth.get() != 0 || record.getCurTickCount() == 0) {
-            timingDepth = 0;
+            timingDepth.set(0);
-            start = 0;
+            start.set(0);
             return;
         }
 
         record.processTick(violated);
+        Akari.timingsLock.lock(); // Akarin
         for (TimingData handler : children.values()) {
             handler.processTick(violated);
         }
+        Akari.timingsLock.unlock(); // Akarin
     }
 
     @Override
@@ -102,42 +107,32 @@ public class TimingHandler implements Timing { // Akarin
         }
     }
 
-    @Override
     public Timing startTiming() {
-        if (enabled && ++timingDepth == 1) {
+        if (enabled && timingDepth.incrementAndGet() == 1) {
-            start = System.nanoTime();
+            start.getAndSet(System.nanoTime());
             parent = TimingsManager.CURRENT;
             TimingsManager.CURRENT = this;
         }
         return this;
     }
 
-    @Override
     public void stopTiming() {
-        if (enabled && --timingDepth == 0 && start != 0) {
+        if (enabled && timingDepth.decrementAndGet() == 0 && start.get() != 0) {
             if (!Bukkit.isPrimaryThread()) {
                 Bukkit.getLogger().log(Level.SEVERE, "stopTiming called async for " + name);
                 new Throwable().printStackTrace();
-                start = 0;
+                start.getAndSet(0);
                 return;
             }
-            addDiff(System.nanoTime() - start);
+            long prev = start.getAndSet(0); // Akarin
-            start = 0;
+            addDiff(System.nanoTime() - prev); // Akarin
         }
     }
 
-    // Akarin start
-    public void stopTiming(long start) {
-        if (enabled && --timingDepth == 0 && start != 0) {
-            addDiff(System.nanoTime() - start);
-        }
-    }
-    // Akarin end
-
     @Override
     public void abort() {
-        if (enabled && timingDepth > 0) {
+        if (enabled && timingDepth.get() > 0) {
-            start = 0;
+            start.getAndSet(0);
         }
     }
 
@@ -145,18 +140,24 @@ public class TimingHandler implements Timing { // Akarin
         if (TimingsManager.CURRENT == this) {
             TimingsManager.CURRENT = parent;
             if (parent != null) {
+                Akari.timingsLock.lock(); // Akarin
                 parent.children.get(id).add(diff);
+                Akari.timingsLock.unlock(); // Akarin
             }
         }
         record.add(diff);
         if (!added) {
             added = true;
             timed = true;
+            Akari.timingsLock.lock(); // Akarin
             TimingsManager.HANDLERS.add(this);
+            Akari.timingsLock.unlock(); // Akarin
         }
         if (groupHandler != null) {
             groupHandler.addDiff(diff);
+            Akari.timingsLock.lock(); // Akarin
             groupHandler.children.get(id).add(diff);
+            Akari.timingsLock.unlock(); // Akarin
         }
     }
 
@@ -170,10 +171,12 @@ public class TimingHandler implements Timing { // Akarin
         if (full) {
             timed = false;
         }
-        start = 0;
+        start.set(0);
-        timingDepth = 0;
+        timingDepth.set(0);
         added = false;
+        Akari.timingsLock.lock(); // Akarin
         children.clear();
+        Akari.timingsLock.unlock(); // Akarin
         checkEnabled();
     }
 
@@ -214,11 +217,13 @@ public class TimingHandler implements Timing { // Akarin
     }
 
     TimingData[] cloneChildren() {
-        final TimingData[] clonedChildren = new TimingData[children.size()];
         int i = 0;
+        Akari.timingsLock.lock(); // Akarin
+        final TimingData[] clonedChildren = new TimingData[children.size()];
         for (TimingData child : children.values()) {
             clonedChildren[i++] = child.clone();
         }
+        Akari.timingsLock.unlock(); // Akarin
         return clonedChildren;
     }
 }

sources/src/main/java/co/aikar/timings/TimingHistory.java

@@ -0,0 +1,355 @@
+/*
+ * This file is licensed under the MIT License (MIT).
+ *
+ * Copyright (c) 2014 Daniel Ennis <http://aikar.co>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package co.aikar.timings;
+
+import co.aikar.timings.TimingHistory.RegionData.RegionId;
+import co.aikar.util.JSONUtil;
+import com.google.common.base.Function;
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+import org.bukkit.Bukkit;
+import org.bukkit.Chunk;
+import org.bukkit.Material;
+import org.bukkit.World;
+import org.bukkit.block.BlockState;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.EntityType;
+import org.bukkit.entity.Player;
+import co.aikar.util.LoadingMap;
+import co.aikar.util.MRUMapCache;
+import io.akarin.api.internal.Akari;
+
+import java.lang.management.ManagementFactory;
+import java.util.Collection;
+import java.util.EnumMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import static co.aikar.timings.TimingsManager.FULL_SERVER_TICK;
+import static co.aikar.timings.TimingsManager.MINUTE_REPORTS;
+import static co.aikar.util.JSONUtil.*;
+
+@SuppressWarnings({"deprecation", "SuppressionAnnotation", "Convert2Lambda", "Anonymous2MethodRef"})
+public class TimingHistory {
+    public static long lastMinuteTime;
+    public static long timedTicks;
+    public static long playerTicks;
+    public static long entityTicks;
+    public static long tileEntityTicks;
+    public static long activatedEntityTicks;
+    private static int worldIdPool = 1;
+    static Map<String, Integer> worldMap = LoadingMap.newHashMap(new Function<String, Integer>() {
+        @Override
+        public Integer apply(String input) {
+            return worldIdPool++;
+        }
+    });
+    private final long endTime;
+    private final long startTime;
+    private final long totalTicks;
+    private final long totalTime; // Represents all time spent running the server this history
+    private final MinuteReport[] minuteReports;
+
+    private final TimingHistoryEntry[] entries;
+    final Set<Material> tileEntityTypeSet = Sets.newHashSet();
+    final Set<EntityType> entityTypeSet = Sets.newHashSet();
+    private final Map<Object, Object> worlds;
+
+    TimingHistory() {
+        this.endTime = System.currentTimeMillis() / 1000;
+        this.startTime = TimingsManager.historyStart / 1000;
+        if (timedTicks % 1200 != 0 || MINUTE_REPORTS.isEmpty()) {
+            this.minuteReports = MINUTE_REPORTS.toArray(new MinuteReport[MINUTE_REPORTS.size() + 1]);
+            this.minuteReports[this.minuteReports.length - 1] = new MinuteReport();
+        } else {
+            this.minuteReports = MINUTE_REPORTS.toArray(new MinuteReport[MINUTE_REPORTS.size()]);
+        }
+        long ticks = 0;
+        for (MinuteReport mp : this.minuteReports) {
+            ticks += mp.ticksRecord.timed;
+        }
+        this.totalTicks = ticks;
+        this.totalTime = FULL_SERVER_TICK.record.getTotalTime();
+        Akari.timingsLock.lock(); // Akarin
+        this.entries = new TimingHistoryEntry[TimingsManager.HANDLERS.size()];
+
+        int i = 0;
+        for (TimingHandler handler : TimingsManager.HANDLERS) {
+            entries[i++] = new TimingHistoryEntry(handler);
+        }
+        Akari.timingsLock.unlock(); // Akarin
+
+
+        // Information about all loaded chunks/entities
+        //noinspection unchecked
+        this.worlds = toObjectMapper(Bukkit.getWorlds(), new Function<World, JSONPair>() {
+            @Override
+            public JSONPair apply(World world) {
+                Map<RegionId, RegionData> regions = LoadingMap.newHashMap(RegionData.LOADER);
+
+                for (Chunk chunk : world.getLoadedChunks()) {
+                    RegionData data = regions.get(new RegionId(chunk.getX(), chunk.getZ()));
+
+                    for (Entity entity : chunk.getEntities()) {
+                        if (entity == null) {
+                            Bukkit.getLogger().warning("Null entity detected in chunk at position x: " + chunk.getX() + ", z: " + chunk.getZ());
+                            continue;
+                        }
+
+                        data.entityCounts.get(entity.getType()).increment();
+                    }
+
+                    for (BlockState tileEntity : chunk.getTileEntities()) {
+                        if (tileEntity == null) {
+                            Bukkit.getLogger().warning("Null tileentity detected in chunk at position x: " + chunk.getX() + ", z: " + chunk.getZ());
+                            continue;
+                        }
+
+                        data.tileEntityCounts.get(tileEntity.getBlock().getType()).increment();
+                    }
+                }
+                return pair(
+                    worldMap.get(world.getName()),
+                    toArrayMapper(regions.values(),new Function<RegionData, Object>() {
+                        @Override
+                        public Object apply(RegionData input) {
+                            return toArray(
+                                input.regionId.x,
+                                input.regionId.z,
+                                toObjectMapper(input.entityCounts.entrySet(),
+                                    new Function<Map.Entry<EntityType, Counter>, JSONPair>() {
+                                        @Override
+                                        public JSONPair apply(Map.Entry<EntityType, Counter> entry) {
+                                            entityTypeSet.add(entry.getKey());
+                                            return pair(
+                                                    String.valueOf(entry.getKey().getTypeId()),
+                                                    entry.getValue().count()
+                                            );
+                                        }
+                                    }
+                                ),
+                                toObjectMapper(input.tileEntityCounts.entrySet(),
+                                    new Function<Map.Entry<Material, Counter>, JSONPair>() {
+                                        @Override
+                                        public JSONPair apply(Map.Entry<Material, Counter> entry) {
+                                            tileEntityTypeSet.add(entry.getKey());
+                                            return pair(
+                                                    String.valueOf(entry.getKey().getId()),
+                                                    entry.getValue().count()
+                                            );
+                                        }
+                                    }
+                                )
+                            );
+                        }
+                    })
+                );
+            }
+        });
+    }
+    static class RegionData {
+        final RegionId regionId;
+        @SuppressWarnings("Guava")
+        static Function<RegionId, RegionData> LOADER = new Function<RegionId, RegionData>() {
+            @Override
+            public RegionData apply(RegionId id) {
+                return new RegionData(id);
+            }
+        };
+        RegionData(RegionId id) {
+            this.regionId = id;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) {
+                return true;
+            }
+            if (o == null || getClass() != o.getClass()) {
+                return false;
+            }
+
+            RegionData that = (RegionData) o;
+
+            return regionId.equals(that.regionId);
+
+        }
+
+        @Override
+        public int hashCode() {
+            return regionId.hashCode();
+        }
+
+        @SuppressWarnings("unchecked")
+        final Map<EntityType, Counter> entityCounts = MRUMapCache.of(LoadingMap.of(
+                new EnumMap<EntityType, Counter>(EntityType.class), Counter.LOADER
+        ));
+        @SuppressWarnings("unchecked")
+        final Map<Material, Counter> tileEntityCounts = MRUMapCache.of(LoadingMap.of(
+                new EnumMap<Material, Counter>(Material.class), Counter.LOADER
+        ));
+
+        static class RegionId {
+            final int x, z;
+            final long regionId;
+            RegionId(int x, int z) {
+                this.x = x >> 5 << 5;
+                this.z = z >> 5 << 5;
+                this.regionId = ((long) (this.x) << 32) + (this.z >> 5 << 5) - Integer.MIN_VALUE;
+            }
+
+            @Override
+            public boolean equals(Object o) {
+                if (this == o) return true;
+                if (o == null || getClass() != o.getClass()) return false;
+
+                RegionId regionId1 = (RegionId) o;
+
+                return regionId == regionId1.regionId;
+
+            }
+
+            @Override
+            public int hashCode() {
+                return (int) (regionId ^ (regionId >>> 32));
+            }
+        }
+    }
+    static void resetTicks(boolean fullReset) {
+        if (fullReset) {
+            // Non full is simply for 1 minute reports
+            timedTicks = 0;
+        }
+        lastMinuteTime = System.nanoTime();
+        playerTicks = 0;
+        tileEntityTicks = 0;
+        entityTicks = 0;
+        activatedEntityTicks = 0;
+    }
+
+    Object export() {
+        return createObject(
+            pair("s", startTime),
+            pair("e", endTime),
+            pair("tk", totalTicks),
+            pair("tm", totalTime),
+            pair("w", worlds),
+            pair("h", toArrayMapper(entries, new Function<TimingHistoryEntry, Object>() {
+                @Override
+                public Object apply(TimingHistoryEntry entry) {
+                    TimingData record = entry.data;
+                    if (!record.hasData()) {
+                        return null;
+                    }
+                    return entry.export();
+                }
+            })),
+            pair("mp", toArrayMapper(minuteReports, new Function<MinuteReport, Object>() {
+                @Override
+                public Object apply(MinuteReport input) {
+                    return input.export();
+                }
+            }))
+        );
+    }
+
+    static class MinuteReport {
+        final long time = System.currentTimeMillis() / 1000;
+
+        final TicksRecord ticksRecord = new TicksRecord();
+        final PingRecord pingRecord = new PingRecord();
+        final TimingData fst = TimingsManager.FULL_SERVER_TICK.minuteData.clone();
+        final double tps = 1E9 / ( System.nanoTime() - lastMinuteTime ) * ticksRecord.timed;
+        final double usedMemory = TimingsManager.FULL_SERVER_TICK.avgUsedMemory;
+        final double freeMemory = TimingsManager.FULL_SERVER_TICK.avgFreeMemory;
+        final double loadAvg = ManagementFactory.getOperatingSystemMXBean().getSystemLoadAverage();
+
+        List<Object> export() {
+            return toArray(
+                time,
+                Math.round(tps * 100D) / 100D,
+                Math.round(pingRecord.avg * 100D) / 100D,
+                fst.export(),
+                toArray(ticksRecord.timed,
+                    ticksRecord.player,
+                    ticksRecord.entity,
+                    ticksRecord.activatedEntity,
+                    ticksRecord.tileEntity
+                ),
+                usedMemory,
+                freeMemory,
+                loadAvg
+            );
+        }
+    }
+
+    private static class TicksRecord {
+        final long timed;
+        final long player;
+        final long entity;
+        final long tileEntity;
+        final long activatedEntity;
+
+        TicksRecord() {
+            timed = timedTicks - (TimingsManager.MINUTE_REPORTS.size() * 1200);
+            player = playerTicks;
+            entity = entityTicks;
+            tileEntity = tileEntityTicks;
+            activatedEntity = activatedEntityTicks;
+        }
+
+    }
+
+    private static class PingRecord {
+        final double avg;
+
+        PingRecord() {
+            final Collection<? extends Player> onlinePlayers = Bukkit.getOnlinePlayers();
+            int totalPing = 0;
+            for (Player player : onlinePlayers) {
+                totalPing += player.spigot().getPing();
+            }
+            avg = onlinePlayers.isEmpty() ? 0 : totalPing / onlinePlayers.size();
+        }
+    }
+
+
+    private static class Counter {
+        private int count = 0;
+        @SuppressWarnings({"rawtypes", "SuppressionAnnotation", "Guava"})
+        static Function LOADER = new LoadingMap.Feeder<Counter>() {
+            @Override
+            public Counter apply() {
+                return new Counter();
+            }
+        };
+        public int increment() {
+            return ++count;
+        }
+        public int count() {
+            return count;
+        }
+    }
+}

sources/src/main/java/co/aikar/timings/TimingsManager.java

@@ -0,0 +1,207 @@
+/*
+ * This file is licensed under the MIT License (MIT).
+ *
+ * Copyright (c) 2014 Daniel Ennis <http://aikar.co>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package co.aikar.timings;
+
+import com.google.common.base.Function;
+import com.google.common.collect.EvictingQueue;
+import org.bukkit.Bukkit;
+import org.bukkit.Server;
+import org.bukkit.command.Command;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.java.PluginClassLoader;
+import co.aikar.util.LoadingMap;
+import io.akarin.api.internal.Akari;
+
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.logging.Level;
+
+/**
+ * Akarin Changes Note
+ * 1) Thread safe timing (safety)
+ */
+public final class TimingsManager {
+    static final Map<TimingIdentifier, TimingHandler> TIMING_MAP =
+        Collections.synchronizedMap(LoadingMap.newHashMap(
+            new Function<TimingIdentifier, TimingHandler>() {
+                @Override
+                public TimingHandler apply(TimingIdentifier id) {
+                    return (id.protect ?
+                        new UnsafeTimingHandler(id) :
+                        new TimingHandler(id)
+                    );
+                }
+            },
+            256, .5F
+        ));
+    public static final FullServerTickHandler FULL_SERVER_TICK = new FullServerTickHandler();
+    public static final TimingHandler TIMINGS_TICK = Timings.ofSafe("Timings Tick", FULL_SERVER_TICK);
+    public static final Timing PLUGIN_GROUP_HANDLER = Timings.ofSafe("Plugins");
+    public static List<String> hiddenConfigs = new ArrayList<String>();
+    public static boolean privacy = false;
+
+    static final Collection<TimingHandler> HANDLERS = new ArrayDeque<TimingHandler>();
+    static final ArrayDeque<TimingHistory.MinuteReport> MINUTE_REPORTS = new ArrayDeque<TimingHistory.MinuteReport>();
+
+    static EvictingQueue<TimingHistory> HISTORY = EvictingQueue.create(12);
+    static TimingHandler CURRENT;
+    static long timingStart = 0;
+    static long historyStart = 0;
+    static boolean needsFullReset = false;
+    static boolean needsRecheckEnabled = false;
+
+    private TimingsManager() {}
+
+    /**
+     * Resets all timing data on the next tick
+     */
+    static void reset() {
+        needsFullReset = true;
+    }
+
+    /**
+     * Ticked every tick by CraftBukkit to count the number of times a timer
+     * caused TPS loss.
+     */
+    static void tick() {
+        if (Timings.timingsEnabled) {
+            boolean violated = FULL_SERVER_TICK.isViolated();
+
+            Akari.timingsLock.lock(); // Akarin
+            for (TimingHandler handler : HANDLERS) {
+                if (handler.isSpecial()) {
+                    // We manually call this
+                    continue;
+                }
+                handler.processTick(violated);
+            }
+            Akari.timingsLock.unlock(); // Akarin
+
+            TimingHistory.playerTicks += Bukkit.getOnlinePlayers().size();
+            TimingHistory.timedTicks++;
+            // Generate TPS/Ping/Tick reports every minute
+        }
+    }
+    static void stopServer() {
+        Timings.timingsEnabled = false;
+        recheckEnabled();
+    }
+    static void recheckEnabled() {
+        synchronized (TIMING_MAP) {
+            for (TimingHandler timings : TIMING_MAP.values()) {
+                timings.checkEnabled();
+            }
+        }
+        needsRecheckEnabled = false;
+    }
+    static void resetTimings() {
+        if (needsFullReset) {
+            // Full resets need to re-check every handlers enabled state
+            // Timing map can be modified from async so we must sync on it.
+            synchronized (TIMING_MAP) {
+                for (TimingHandler timings : TIMING_MAP.values()) {
+                    timings.reset(true);
+                }
+            }
+            Bukkit.getLogger().log(Level.INFO, "Timings Reset");
+            HISTORY.clear();
+            needsFullReset = false;
+            needsRecheckEnabled = false;
+            timingStart = System.currentTimeMillis();
+        } else {
+            // Soft resets only need to act on timings that have done something
+            // Handlers can only be modified on main thread.
+            Akari.timingsLock.lock(); // Akarin
+            for (TimingHandler timings : HANDLERS) {
+                timings.reset(false);
+            }
+            Akari.timingsLock.unlock(); // Akarin
+        }
+
+        Akari.timingsLock.lock(); // Akarin
+        HANDLERS.clear();
+        Akari.timingsLock.unlock(); // Akarin
+        MINUTE_REPORTS.clear();
+
+        TimingHistory.resetTicks(true);
+        historyStart = System.currentTimeMillis();
+    }
+
+    static TimingHandler getHandler(String group, String name, Timing parent, boolean protect) {
+        return TIMING_MAP.get(new TimingIdentifier(group, name, parent, protect));
+    }
+
+
+    /**
+     * <p>Due to access restrictions, we need a helper method to get a Command TimingHandler with String group</p>
+     *
+     * Plugins should never call this
+     *
+     * @param pluginName Plugin this command is associated with
+     * @param command    Command to get timings for
+     * @return TimingHandler
+     */
+    public static Timing getCommandTiming(String pluginName, Command command) {
+        Plugin plugin = null;
+        final Server server = Bukkit.getServer();
+        if (!(  server == null || pluginName == null ||
+                "minecraft".equals(pluginName) || "bukkit".equals(pluginName) ||
+                "spigot".equalsIgnoreCase(pluginName) || "paper".equals(pluginName)
+        )) {
+            plugin = server.getPluginManager().getPlugin(pluginName);
+        }
+        if (plugin == null) {
+            // Plugin is passing custom fallback prefix, try to look up by class loader
+            plugin = getPluginByClassloader(command.getClass());
+        }
+        if (plugin == null) {
+            return Timings.ofSafe("Command: " + pluginName + ":" + command.getTimingName());
+        }
+
+        return Timings.ofSafe(plugin, "Command: " + pluginName + ":" + command.getTimingName());
+    }
+
+    /**
+     * Looks up the class loader for the specified class, and if it is a PluginClassLoader, return the
+     * Plugin that created this class.
+     *
+     * @param clazz Class to check
+     * @return Plugin if created by a plugin
+     */
+    public static Plugin getPluginByClassloader(Class<?> clazz) {
+        if (clazz == null) {
+            return null;
+        }
+        final ClassLoader classLoader = clazz.getClassLoader();
+        if (classLoader instanceof PluginClassLoader) {
+            PluginClassLoader pluginClassLoader = (PluginClassLoader) classLoader;
+            return pluginClassLoader.getPlugin();
+        }
+        return null;
+    }
+}

sources/src/main/java/io/akarin/api/internal/Akari.java

@@ -4,7 +4,9 @@ import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 import java.util.Queue;
 import java.util.concurrent.ExecutorCompletionService;
+import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.TimeUnit;
 
 import org.apache.commons.lang3.StringUtils;
 import org.apache.logging.log4j.LogManager;
@@ -14,8 +16,14 @@ import com.google.common.util.concurrent.ThreadFactoryBuilder;
 
 import co.aikar.timings.Timing;
 import co.aikar.timings.Timings;
+import io.akarin.api.internal.Akari.AssignableFactory;
+import io.akarin.api.internal.Akari.TimingSignal;
+import io.akarin.api.internal.utils.ReentrantSpinningLock;
+import io.akarin.api.internal.utils.thread.SuspendableExecutorCompletionService;
+import io.akarin.api.internal.utils.thread.SuspendableThreadPoolExecutor;
 import io.akarin.server.core.AkarinGlobalConfig;
 import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.World;
 import net.minecraft.server.WorldServer;
 
 @SuppressWarnings("restriction")
@@ -61,8 +69,43 @@ public abstract class Akari {
         }
     }
     
-    public static ExecutorCompletionService<WorldServer> STAGE_ENTITY_TICK;
+    public static class TimingSignal {
-    public static ExecutorCompletionService<WorldServer> STAGE_WORLD_TICK;
+        public final World tickedWorld;
+        public final boolean isEntities;
+        
+        public TimingSignal(World world, boolean entities) {
+            tickedWorld = world;
+            isEntities = entities;
+        }
+    }
+    
+    public static SuspendableExecutorCompletionService<TimingSignal> STAGE_TICK;
+    
+    static {
+        resizeTickExecutors(3);
+    }
+    
+    public static void resizeTickExecutors(int worlds) {
+        int parallelism;
+        switch (AkarinGlobalConfig.parallelMode) {
+            case -1:
+                return;
+            case 0:
+                parallelism = 2;
+                break;
+            case 1:
+                parallelism = worlds + 1;
+                break;
+            case 2:
+            default:
+                parallelism = worlds * 2;
+                break;
+        }
+        STAGE_TICK = new SuspendableExecutorCompletionService<>(new SuspendableThreadPoolExecutor(parallelism, parallelism,
+                0L, TimeUnit.MILLISECONDS,
+                new LinkedBlockingQueue<Runnable>(),
+                new AssignableFactory("Akarin Parallel Ticking Thread - $")));
+    }
     
     public static boolean isPrimaryThread() {
         return isPrimaryThread(true);
@@ -97,6 +140,8 @@ public abstract class Akari {
         return serverVersion + " (MC: " + MinecraftServer.getServer().getVersion() + ")";
     }
     
+    public static final ReentrantSpinningLock timingsLock = new ReentrantSpinningLock();
+    
     /*
      * Timings
      */

sources/src/main/java/io/akarin/api/internal/utils/ReentrantSpinningLock.java

@@ -0,0 +1,98 @@
+package io.akarin.api.internal.utils;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class ReentrantSpinningLock {
+    /*
+     * Impl Note:
+     * A write lock can reentrant as a read lock, while a
+     * read lock is not allowed to reentrant as a write lock.
+     */
+    private final AtomicBoolean writeLocked = new AtomicBoolean(false);
+    
+    // --------- Thread local restricted fields ---------
+    private long heldThreadId = 0;
+    private int reentrantLocks = 0;
+    
+    /**
+     * Lock as a typical write lock
+     */
+    public void lock() {
+        long currentThreadId = Thread.currentThread().getId();
+        if (heldThreadId == currentThreadId) {
+            reentrantLocks++;
+        } else {
+            while (!writeLocked.compareAndSet(false, true)) ; // In case acquire one lock concurrently
+            heldThreadId = currentThreadId;
+        }
+    }
+    
+    public void unlock() {
+        if (reentrantLocks == 0) {
+            heldThreadId = 0;
+            if (readerThreads.get() == 0 || readerThreads.getAndDecrement() == 1) { // Micro-optimization: this saves one subtract
+                writeLocked.set(false);
+            }
+        } else {
+            --reentrantLocks;
+        }
+    }
+    
+    private final AtomicInteger readerThreads = new AtomicInteger(0);
+    
+    /**
+     * Lock as a typical read lock
+     */
+    public void lockWeak() {
+        long currentThreadId = Thread.currentThread().getId();
+        if (heldThreadId == currentThreadId) {
+            reentrantLocks++;
+        } else {
+            if (readerThreads.get() == 0) {
+                while (!writeLocked.compareAndSet(false, true)) ; // Block future write lock
+            }
+            heldThreadId = currentThreadId;
+            readerThreads.getAndIncrement(); // Micro-optimization: this saves one plus
+        }
+    }
+    
+    public void unlockWeak() {
+        if (reentrantLocks == 0) {
+            heldThreadId = 0;
+            writeLocked.set(false);
+        } else {
+            --reentrantLocks;
+        }
+    }
+    
+    // --------- Wrappers to allow typical usages ---------
+    private SpinningWriteLock wrappedWriteLock = new SpinningWriteLock();
+    private SpinningReadLock wrappedReadLock = new SpinningReadLock();
+    
+    public class SpinningWriteLock {
+        public void lock() {
+            lock();
+        }
+        public void unlock() {
+            unlock();
+        }
+    }
+    
+    public class SpinningReadLock {
+        public void lock() {
+            lockWeak();
+        }
+        public void unlock() {
+            unlockWeak();
+        }
+    }
+    
+    public SpinningWriteLock writeLock() {
+        return wrappedWriteLock;
+    }
+    
+    public SpinningReadLock readLocked() {
+        return wrappedReadLock;
+    }
+}

sources/src/main/java/io/akarin/api/internal/utils/thread/OpenExecutionException.java

@@ -0,0 +1,7 @@
+package io.akarin.api.internal.utils.thread;
+
+import java.util.concurrent.ExecutionException;
+
+public class OpenExecutionException extends ExecutionException {
+    private static final long serialVersionUID = 7830266012832686185L;
+}

sources/src/main/java/io/akarin/api/internal/utils/thread/SuspendableExecutorCompletionService.java

@@ -0,0 +1,142 @@
+/*
+ * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ */
+
+/*
+ *
+ *
+ *
+ *
+ *
+ * Written by Doug Lea with assistance from members of JCP JSR-166
+ * Expert Group and released to the public domain, as explained at
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+package io.akarin.api.internal.utils.thread;
+
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.Callable;
+import java.util.concurrent.CompletionService;
+import java.util.concurrent.Future;
+import java.util.concurrent.FutureTask;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.RunnableFuture;
+import java.util.concurrent.TimeUnit;
+
+public class SuspendableExecutorCompletionService<V> implements CompletionService<V> {
+    private final SuspendableThreadPoolExecutor executor;
+    private final BlockingQueue<Future<V>> completionQueue;
+    
+    public void suspend() {
+        executor.suspend();
+    }
+    
+    public void resume() {
+        executor.resume();
+    }
+
+    /**
+     * FutureTask extension to enqueue upon completion
+     */
+    private class QueueingFuture extends FutureTask<Void> {
+        QueueingFuture(RunnableFuture<V> task) {
+            super(task, null);
+            this.task = task;
+        }
+        protected void done() { completionQueue.add(task); }
+        private final Future<V> task;
+    }
+
+    private RunnableFuture<V> newTaskFor(Callable<V> task) {
+        return new FutureTask<V>(task);
+    }
+
+    private RunnableFuture<V> newTaskFor(Runnable task, V result) {
+        return new FutureTask<V>(task, result);
+    }
+
+    /**
+     * Creates an ExecutorCompletionService using the supplied
+     * executor for base task execution and a
+     * {@link LinkedBlockingQueue} as a completion queue.
+     *
+     * @param executor the executor to use
+     * @throws NullPointerException if executor is {@code null}
+     */
+    public SuspendableExecutorCompletionService(SuspendableThreadPoolExecutor executor) {
+        if (executor == null)
+            throw new NullPointerException();
+        this.executor = executor;
+        this.completionQueue = new LinkedBlockingQueue<Future<V>>();
+    }
+
+    /**
+     * Creates an ExecutorCompletionService using the supplied
+     * executor for base task execution and the supplied queue as its
+     * completion queue.
+     *
+     * @param executor the executor to use
+     * @param completionQueue the queue to use as the completion queue
+     *        normally one dedicated for use by this service. This
+     *        queue is treated as unbounded -- failed attempted
+     *        {@code Queue.add} operations for completed tasks cause
+     *        them not to be retrievable.
+     * @throws NullPointerException if executor or completionQueue are {@code null}
+     */
+    public SuspendableExecutorCompletionService(SuspendableThreadPoolExecutor executor,
+                                     BlockingQueue<Future<V>> completionQueue) {
+        if (executor == null || completionQueue == null)
+            throw new NullPointerException();
+        this.executor = executor;
+        this.completionQueue = completionQueue;
+    }
+
+    public Future<V> submit(Callable<V> task) {
+        if (task == null) throw new NullPointerException();
+        RunnableFuture<V> f = newTaskFor(task);
+        executor.execute(new QueueingFuture(f));
+        return f;
+    }
+
+    public Future<V> submit(Runnable task, V result) {
+        if (task == null) throw new NullPointerException();
+        RunnableFuture<V> f = newTaskFor(task, result);
+        executor.execute(new QueueingFuture(f));
+        return f;
+    }
+
+    public Future<V> take() throws InterruptedException {
+        return completionQueue.take();
+    }
+
+    public Future<V> poll() {
+        return completionQueue.poll();
+    }
+
+    public Future<V> poll(long timeout, TimeUnit unit)
+            throws InterruptedException {
+        return completionQueue.poll(timeout, unit);
+    }
+
+}

sources/src/main/java/io/akarin/server/core/AkarinGlobalConfig.java

@@ -160,11 +160,6 @@ public class AkarinGlobalConfig {
         playersPerIOThread = getInt("core.players-per-chunk-io-thread", 50);
     }
     
-    public static boolean silentAsyncTimings;
-    private static void silentAsyncTimings() {
-        silentAsyncTimings = getBoolean("core.always-silent-async-timing", false);
-    }
-    
     public static long timeUpdateInterval;
     private static void timeUpdateInterval() {
         timeUpdateInterval = getSeconds(getString("core.tick-rate.world-time-update-interval", "1s")) * 10;
@@ -257,4 +252,9 @@ public class AkarinGlobalConfig {
     private static void fileIOThreads() {
         fileIOThreads = getInt("core.chunk-save-threads", 2);
     }
+    
+    public static int parallelMode;
+    private static void parallelMode() {
+        parallelMode = getInt("core.parallel-mode", 1);
+    }
 }

sources/src/main/java/io/akarin/server/mixin/core/MixinMinecraftServer.java

@@ -60,11 +60,9 @@ public abstract class MixinMinecraftServer {
             shift = At.Shift.BEFORE
     ))
     private void prerun(CallbackInfo info) {
-        Akari.STAGE_ENTITY_TICK = new ExecutorCompletionService<>(Executors.newFixedThreadPool((cachedWorldSize = worlds.size()), new AssignableFactory("Akarin Parallel Entity Ticking Thread - $")));
-        Akari.STAGE_WORLD_TICK = new ExecutorCompletionService<>(Executors.newFixedThreadPool(cachedWorldSize - 1, new AssignableFactory("Akarin Parallel World Ticking Thread - $")));
-		
         primaryThread.setPriority(AkarinGlobalConfig.primaryThreadPriority < Thread.NORM_PRIORITY ? Thread.NORM_PRIORITY :
             (AkarinGlobalConfig.primaryThreadPriority > Thread.MAX_PRIORITY ? 10 : AkarinGlobalConfig.primaryThreadPriority));
+        Akari.resizeTickExecutors((cachedWorldSize = worlds.size()));
         
         for (int i = 0; i < worlds.size(); ++i) {
             WorldServer world = worlds.get(i);
@@ -157,7 +155,11 @@ public abstract class MixinMinecraftServer {
     
     private boolean tickEntities(WorldServer world) {
         try {
+            world.timings.tickEntities.startTiming();
             world.tickEntities();
+            world.timings.tickEntities.stopTiming();
+            world.getTracker().updatePlayers();
+            world.explosionDensityCache.clear(); // Paper - Optimize explosions
         } catch (Throwable throwable) {
             CrashReport crashreport;
             try {
@@ -173,7 +175,9 @@ public abstract class MixinMinecraftServer {
     
     private void tickWorld(WorldServer world) {
         try {
+            world.timings.doTick.startTiming();
             world.doTick();
+            world.timings.doTick.stopTiming();
         } catch (Throwable throwable) {
             CrashReport crashreport;
             try {
@@ -213,70 +217,87 @@ public abstract class MixinMinecraftServer {
         ChunkIOExecutor.tick();
         MinecraftTimings.chunkIOTickTimer.stopTiming();
         
-        Akari.worldTiming.startTiming();
+        if (cachedWorldSize != worlds.size()) Akari.resizeTickExecutors((cachedWorldSize = worlds.size()));
-        // Resize
+        switch (AkarinGlobalConfig.parallelMode) {
-        if (cachedWorldSize != worlds.size()) {
+            case 1:
-            Akari.STAGE_ENTITY_TICK = new ExecutorCompletionService<>(Executors.newFixedThreadPool(cachedWorldSize = worlds.size(), new AssignableFactory("Akarin Parallel Entity Ticking Thread - $")));
+            case 2:
-            Akari.STAGE_WORLD_TICK = new ExecutorCompletionService<>(Executors.newFixedThreadPool(cachedWorldSize - 1, new AssignableFactory("Akarin Parallel World Ticking Thread - $")));
+            default:
-        }
-        tickedPrimaryEntities = false;
                 // Never tick one world concurrently!
-        int worldSize = worlds.size();
+                for (int i = 0; i < cachedWorldSize; i++) {
-        for (int i = 0; i < worldSize; i++) {
                     // Impl Note:
-            // Entities ticking: index 2 -> ... -> 0 -> 1 (parallel)
+                    // Entities ticking: index 1 -> ... -> 0 (parallel)
-            //   World  ticking: index 1 -> ... (parallel) | 0 (main thread)
+                    //   World  ticking: index 0 -> ... (parallel)
-            int interlaceEntity = i + 2;
+                    int interlace = i + 1;
-            WorldServer entityWorld = null;
+                    WorldServer entityWorld = worlds.get(interlace < cachedWorldSize ? interlace : 0);
-            if (interlaceEntity < worldSize) {
+                    Akari.STAGE_TICK.submit(() -> {
-                entityWorld = worlds.get(interlaceEntity);
+                        synchronized (((IMixinWorldServer) entityWorld).lock()) {
-            } else {
+                            tickEntities(entityWorld);
-                if (tickedPrimaryEntities) {
-                    entityWorld = worlds.get(1);
-                } else {
-                    entityWorld = worlds.get(0);
-                    tickedPrimaryEntities = true;
                         }
-            }
+                    }, null/*new TimingSignal(entityWorld, true)*/);
-            entityWorld.timings.tickEntities.startTiming();
-            WorldServer fEntityWorld = entityWorld;
-			Akari.STAGE_ENTITY_TICK.submit(() -> {
-				synchronized (((IMixinWorldServer) fEntityWorld).lock()) {
-					tickEntities(fEntityWorld);
-					fEntityWorld.getTracker().updatePlayers();
-					fEntityWorld.explosionDensityCache.clear(); // Paper - Optimize explosions
-				}
-			}, entityWorld);
                     
-			int interlaceWorld = i + 1;
+                    if (AkarinGlobalConfig.parallelMode != 1) {
-			if (interlaceWorld < worldSize) {
+                        int fi = i;
-                WorldServer world = worlds.get(interlaceWorld);
+                        Akari.STAGE_TICK.submit(() -> {
-                world.timings.doTick.startTiming();
+                            WorldServer world = worlds.get(fi);
-                Akari.STAGE_WORLD_TICK.submit(() -> {
                             synchronized (((IMixinWorldServer) world).lock()) {
                                 tickWorld(world);
                             }
-                }, world);
+                        }, null);
                     }
                 }
                 
-        WorldServer primaryWorld = worlds.get(0);
+                if (AkarinGlobalConfig.parallelMode == 1)
-        primaryWorld.timings.doTick.startTiming();
+                Akari.STAGE_TICK.submit(() -> {
-        synchronized (((IMixinWorldServer) primaryWorld).lock()) {
+                    for (int i = 0; i < cachedWorldSize; i++) {
-            tickWorld(primaryWorld);
-        }
-        primaryWorld.timings.doTick.stopTiming();
-        
-        for (int i = 0; i < worldSize; i++) {
                         WorldServer world = worlds.get(i);
+                        synchronized (((IMixinWorldServer) world).lock()) {
+                            tickWorld(world);
+                        }
+                    }
+                }, null);
+                
+                for (int i = (AkarinGlobalConfig.parallelMode == 1 ? cachedWorldSize + 1 : cachedWorldSize * 2); i --> 0 ;) {
+                    Akari.STAGE_TICK.take();
+                }
+                
+                /* for (int i = (AkarinGlobalConfig.parallelMode == 1 ? cachedWorldSize : cachedWorldSize * 2); i --> 0 ;) {
                     long startTiming = System.nanoTime();
-            if (i != 0) {
+                    TimingSignal signal = Akari.STAGE_TICK.take().get();
-                ((TimingHandler) Akari.STAGE_WORLD_TICK.take().get().timings.doTick).stopTiming(startTiming);
+                    IMixinTimingHandler timing = (IMixinTimingHandler) (signal.isEntities ? signal.tickedWorld.timings.tickEntities : signal.tickedWorld.timings.doTick);
-                startTiming = System.nanoTime();
+                    timing.stopTiming(startTiming); // The overlap will be ignored
+                } */
+                
+                break;
+            case 0:
+                Akari.STAGE_TICK.submit(() -> {
+                    for (int i = 1; i <= cachedWorldSize; ++i) {
+                        WorldServer world = worlds.get(i < cachedWorldSize ? i : 0);
+                        synchronized (((IMixinWorldServer) world).lock()) {
+                            tickEntities(world);
                         }
-            ((TimingHandler) Akari.STAGE_ENTITY_TICK.take().get().timings.tickEntities).stopTiming(startTiming);
                     }
-        Akari.worldTiming.stopTiming();
+                }, null);
+                
+                Akari.STAGE_TICK.submit(() -> {
+                    for (int i = 0; i < cachedWorldSize; ++i) {
+                        WorldServer world = worlds.get(i);
+                        synchronized (((IMixinWorldServer) world).lock()) {
+                            tickWorld(world);
+                        }
+                    }
+                }, null);
+                
+                Akari.STAGE_TICK.take();
+                Akari.STAGE_TICK.take();
+                break;
+            case -1:
+                for (int i = 0; i < cachedWorldSize; ++i) {
+                    WorldServer world = worlds.get(i);
+                    tickWorld(world);
+                    tickEntities(world);
+                }
+                break;
+        }
         
         Akari.callbackTiming.startTiming();
         while ((runnable = Akari.callbackQueue.poll()) != null) runnable.run();

sources/src/main/java/io/akarin/server/mixin/core/MixinTimingHandler.java

@@ -1,52 +1,35 @@
 package io.akarin.server.mixin.core;
 
-import java.util.logging.Level;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
 
-import org.bukkit.Bukkit;
 import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Overwrite;
 import org.spongepowered.asm.mixin.Shadow;
-import org.spongepowered.asm.mixin.injection.At;
-import org.spongepowered.asm.mixin.injection.Inject;
-import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
-
 import co.aikar.timings.Timing;
-import co.aikar.timings.TimingHandler;
-import io.akarin.api.internal.Akari;
-import io.akarin.api.internal.Akari.AssignableThread;
-import io.akarin.server.core.AkarinGlobalConfig;
-import net.minecraft.server.MinecraftServer;
 
-@Mixin(value = TimingHandler.class, remap = false)
+@Mixin(targets = "co.aikar.timings.TimingHandler", remap = false)
 public abstract class MixinTimingHandler {
     @Shadow @Final String name;
     @Shadow private boolean enabled;
-    @Shadow private volatile long start;
+    @Shadow private AtomicLong start;
-    @Shadow private volatile int timingDepth;
+    @Shadow private AtomicInteger timingDepth;
     
     @Shadow abstract void addDiff(long diff);
     @Shadow public abstract Timing startTiming();
     
     @Overwrite
     public Timing startTimingIfSync() {
-        if (Akari.isPrimaryThread(false)) {
         startTiming();
-        }
         return (Timing) this;
     }
     
-    @SuppressWarnings({"rawtypes", "unchecked"})
-    @Inject(method = "startTiming", at = @At("HEAD"), cancellable = true)
-    public void onStartTiming(CallbackInfoReturnable cir) {
-        if (!Akari.isPrimaryThread(false)) cir.setReturnValue(this); // Avoid modify any field
-    }
-    
     @Overwrite
     public void stopTimingIfSync() {
-        if (Akari.isPrimaryThread(false)) {
+        //if (Akari.isPrimaryThread(false)) {
             stopTiming(true); // Avoid twice thread check
-        }
+        //}
     }
     
     @Overwrite
@@ -54,20 +37,26 @@ public abstract class MixinTimingHandler {
         stopTiming(false);
     }
     
-    public void stopTiming(boolean alreadySync) {
+    public void stopTiming(long start) {
-        Thread curThread = Thread.currentThread();
+        if (enabled) addDiff(System.nanoTime() - start);
-        if (!enabled || curThread instanceof AssignableThread) return;
+    }
-        if (!alreadySync && curThread != MinecraftServer.getServer().primaryThread) {
-            if (AkarinGlobalConfig.silentAsyncTimings) return;
     
+    public void stopTiming(boolean alreadySync) {
+        if (!enabled || timingDepth.decrementAndGet() != 0 || start.get() == 0) return;
+        /*if (!alreadySync) {
+            Thread curThread = Thread.currentThread();
+            if (curThread != MinecraftServer.getServer().primaryThread) {
+                if (false && !AkarinGlobalConfig.silentAsyncTimings) {
                     Bukkit.getLogger().log(Level.SEVERE, "stopTiming called async for " + name);
                     Thread.dumpStack();
                 }
-        
-        // Main thread ensured
-        if (--timingDepth == 0 && start != 0) {
-            addDiff(System.nanoTime() - start);
                 start = 0;
+                return;
             }
+        }*/
+        
+        // Safety ensured
+        long prev = start.getAndSet(0); // Akarin
+        addDiff(System.nanoTime() - prev); // Akarin
     }
 }