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Add hit-miss metric

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Lukas Rieger (Blue) 2022-08-06 08:46:52 +02:00
parent bddd455581
commit f50a86d5e1
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GPG Key ID: 2D09EC5ED2687FF2
1 changed files with 48 additions and 1 deletions
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49
BlueMapCore/src/main/java/de/bluecolored/bluemap/core/mca/MCAWorld.java
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@ -30,6 +30,7 @@
import com.github.benmanes.caffeine.cache.LoadingCache;
import de.bluecolored.bluemap.core.BlueMap;
import de.bluecolored.bluemap.api.debug.DebugDump;
import de.bluecolored.bluemap.core.debug.StateDumper;
import de.bluecolored.bluemap.core.logger.Logger;
import de.bluecolored.bluemap.core.world.Grid;
import de.bluecolored.bluemap.core.world.World;
@ -46,6 +47,7 @@
import java.util.Collections;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
@DebugDump
public class MCAWorld implements World {
@ -291,14 +293,59 @@ private static Path resolveLevelFile(Path worldFolder) throws IOException {
private static final int VEC_2I_CACHE_SIZE = 0x4000;
private static final int VEC_2I_CACHE_MASK = VEC_2I_CACHE_SIZE - 1;
private static final Vector2i[] VEC_2I_CACHE = new Vector2i[VEC_2I_CACHE_SIZE];
private static final HitMissMetric HIT_MISS_METRIC = new HitMissMetric();
static {
StateDumper.global().register(HIT_MISS_METRIC);
}
private static Vector2i vec2i(int x, int y) {
int cacheIndex = (x * 1456 ^ y * 948375892) & VEC_2I_CACHE_MASK;
Vector2i possibleMatch = VEC_2I_CACHE[cacheIndex];
if (possibleMatch != null && possibleMatch.getX() == x && possibleMatch.getY() == y)
if (possibleMatch != null && possibleMatch.getX() == x && possibleMatch.getY() == y) {
HIT_MISS_METRIC.hit();
return possibleMatch;
}
HIT_MISS_METRIC.miss();
return VEC_2I_CACHE[cacheIndex] = new Vector2i(x, y);
}
@DebugDump
private static class HitMissMetric {
private final AtomicLong
hits = new AtomicLong(),
misses = new AtomicLong();
public void hit() {
hits.incrementAndGet();
}
public void miss() {
misses.incrementAndGet();
}
public long getHits() {
return hits.get();
}
public long getMisses() {
return misses.get();
}
@DebugDump
public long getSum() {
return hits.get() + misses.get();
}
@DebugDump
public double getHitRate() {
long hits = getHits();
long misses = getMisses();
return (double) hits / (hits + misses);
}
}
}