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/*
* Copyright (c) 2024, Google LLC and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.eclipse.jgit.internal.storage.dfs;
import static org.eclipse.jgit.internal.storage.dfs.DfsBlockCacheTable.BlockCacheStats;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertArrayEquals;
import java.util.List;
import org.eclipse.jgit.internal.storage.pack.PackExt;
import org.junit.Test;
public class AggregatedBlockCacheStatsTest {
@Test
public void getName() {
BlockCacheStats aggregatedBlockCacheStats = AggregatedBlockCacheStats
.fromStatsList(List.of());
assertThat(aggregatedBlockCacheStats.getName(),
equalTo(AggregatedBlockCacheStats.class.getName()));
}
@Test
public void getCurrentSize_aggregatesCurrentSizes() {
long[] currentSizes = createEmptyStatsArray();
DfsBlockCacheStats packStats = new DfsBlockCacheStats();
packStats.addToLiveBytes(new TestKey(PackExt.PACK), 5);
currentSizes[PackExt.PACK.getPosition()] = 5;
DfsBlockCacheStats bitmapStats = new DfsBlockCacheStats();
bitmapStats.addToLiveBytes(new TestKey(PackExt.BITMAP_INDEX), 6);
currentSizes[PackExt.BITMAP_INDEX.getPosition()] = 6;
DfsBlockCacheStats indexStats = new DfsBlockCacheStats();
indexStats.addToLiveBytes(new TestKey(PackExt.INDEX), 7);
currentSizes[PackExt.INDEX.getPosition()] = 7;
BlockCacheStats aggregatedBlockCacheStats = AggregatedBlockCacheStats
.fromStatsList(List.of(packStats, bitmapStats, indexStats));
assertArrayEquals(aggregatedBlockCacheStats.getCurrentSize(),
currentSizes);
}
@Test
public void getHitCount_aggregatesHitCounts() {
long[] hitCounts = createEmptyStatsArray();
DfsBlockCacheStats packStats = new DfsBlockCacheStats();
incrementCounter(5,
() -> packStats.incrementHit(new TestKey(PackExt.PACK)));
hitCounts[PackExt.PACK.getPosition()] = 5;
DfsBlockCacheStats bitmapStats = new DfsBlockCacheStats();
incrementCounter(6, () -> bitmapStats
.incrementHit(new TestKey(PackExt.BITMAP_INDEX)));
hitCounts[PackExt.BITMAP_INDEX.getPosition()] = 6;
DfsBlockCacheStats indexStats = new DfsBlockCacheStats();
incrementCounter(7,
() -> indexStats.incrementHit(new TestKey(PackExt.INDEX)));
hitCounts[PackExt.INDEX.getPosition()] = 7;
BlockCacheStats aggregatedBlockCacheStats = AggregatedBlockCacheStats
.fromStatsList(List.of(packStats, bitmapStats, indexStats));
assertArrayEquals(aggregatedBlockCacheStats.getHitCount(), hitCounts);
}
@Test
public void getMissCount_aggregatesMissCounts() {
long[] missCounts = createEmptyStatsArray();
DfsBlockCacheStats packStats = new DfsBlockCacheStats();
incrementCounter(5,
() -> packStats.incrementMiss(new TestKey(PackExt.PACK)));
missCounts[PackExt.PACK.getPosition()] = 5;
DfsBlockCacheStats bitmapStats = new DfsBlockCacheStats();
incrementCounter(6, () -> bitmapStats
.incrementMiss(new TestKey(PackExt.BITMAP_INDEX)));
missCounts[PackExt.BITMAP_INDEX.getPosition()] = 6;
DfsBlockCacheStats indexStats = new DfsBlockCacheStats();
incrementCounter(7,
() -> indexStats.incrementMiss(new TestKey(PackExt.INDEX)));
missCounts[PackExt.INDEX.getPosition()] = 7;
BlockCacheStats aggregatedBlockCacheStats = AggregatedBlockCacheStats
.fromStatsList(List.of(packStats, bitmapStats, indexStats));
assertArrayEquals(aggregatedBlockCacheStats.getMissCount(), missCounts);
}
@Test
public void getTotalRequestCount_aggregatesRequestCounts() {
long[] totalRequestCounts = createEmptyStatsArray();
DfsBlockCacheStats packStats = new DfsBlockCacheStats();
incrementCounter(5, () -> {
packStats.incrementHit(new TestKey(PackExt.PACK));
packStats.incrementMiss(new TestKey(PackExt.PACK));
});
totalRequestCounts[PackExt.PACK.getPosition()] = 10;
DfsBlockCacheStats bitmapStats = new DfsBlockCacheStats();
incrementCounter(6, () -> {
bitmapStats.incrementHit(new TestKey(PackExt.BITMAP_INDEX));
bitmapStats.incrementMiss(new TestKey(PackExt.BITMAP_INDEX));
});
totalRequestCounts[PackExt.BITMAP_INDEX.getPosition()] = 12;
DfsBlockCacheStats indexStats = new DfsBlockCacheStats();
incrementCounter(7, () -> {
indexStats.incrementHit(new TestKey(PackExt.INDEX));
indexStats.incrementMiss(new TestKey(PackExt.INDEX));
});
totalRequestCounts[PackExt.INDEX.getPosition()] = 14;
BlockCacheStats aggregatedBlockCacheStats = AggregatedBlockCacheStats
.fromStatsList(List.of(packStats, bitmapStats, indexStats));
assertArrayEquals(aggregatedBlockCacheStats.getTotalRequestCount(),
totalRequestCounts);
}
@Test
public void getHitRatio_aggregatesHitRatios() {
long[] hitRatios = createEmptyStatsArray();
DfsBlockCacheStats packStats = new DfsBlockCacheStats();
incrementCounter(5,
() -> packStats.incrementHit(new TestKey(PackExt.PACK)));
hitRatios[PackExt.PACK.getPosition()] = 100;
DfsBlockCacheStats bitmapStats = new DfsBlockCacheStats();
incrementCounter(6, () -> {
bitmapStats.incrementHit(new TestKey(PackExt.BITMAP_INDEX));
bitmapStats.incrementMiss(new TestKey(PackExt.BITMAP_INDEX));
});
hitRatios[PackExt.BITMAP_INDEX.getPosition()] = 50;
DfsBlockCacheStats indexStats = new DfsBlockCacheStats();
incrementCounter(7,
() -> indexStats.incrementMiss(new TestKey(PackExt.INDEX)));
hitRatios[PackExt.INDEX.getPosition()] = 0;
BlockCacheStats aggregatedBlockCacheStats = AggregatedBlockCacheStats
.fromStatsList(List.of(packStats, bitmapStats, indexStats));
assertArrayEquals(aggregatedBlockCacheStats.getHitRatio(), hitRatios);
}
@Test
public void getEvictions_aggregatesEvictions() {
long[] evictions = createEmptyStatsArray();
DfsBlockCacheStats packStats = new DfsBlockCacheStats();
incrementCounter(5,
() -> packStats.incrementEvict(new TestKey(PackExt.PACK)));
evictions[PackExt.PACK.getPosition()] = 5;
DfsBlockCacheStats bitmapStats = new DfsBlockCacheStats();
incrementCounter(6, () -> bitmapStats
.incrementEvict(new TestKey(PackExt.BITMAP_INDEX)));
evictions[PackExt.BITMAP_INDEX.getPosition()] = 6;
DfsBlockCacheStats indexStats = new DfsBlockCacheStats();
incrementCounter(7,
() -> indexStats.incrementEvict(new TestKey(PackExt.INDEX)));
evictions[PackExt.INDEX.getPosition()] = 7;
BlockCacheStats aggregatedBlockCacheStats = AggregatedBlockCacheStats
.fromStatsList(List.of(packStats, bitmapStats, indexStats));
assertArrayEquals(aggregatedBlockCacheStats.getEvictions(), evictions);
}
private static void incrementCounter(int amount, Runnable fn) {
for (int i = 0; i < amount; i++) {
fn.run();
}
}
private static long[] createEmptyStatsArray() {
return new long[PackExt.values().length];
}
private static class TestKey extends DfsStreamKey {
TestKey(PackExt packExt) {
super(0, packExt);
}
@Override
public boolean equals(Object o) {
return false;
}
}
}
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