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8361520: Stabilize SystemGC benchmarks

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Reviewed-by: tschatzl, ayang
This commit is contained in:
Aleksey Shipilev 2025-07-09 08:56:44 +00:00
parent b1fa1ecc98
commit a9bd1ad40c
12 changed files with 125 additions and 0 deletions
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10
test/micro/org/openjdk/bench/vm/gc/systemgc/AllDead.java
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@ -26,16 +26,20 @@ import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.ArrayList;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.SingleShotTime)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(value=25, jvmArgs={"-Xmx5g", "-Xms5g", "-Xmn3g", "-XX:+AlwaysPreTouch"})
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@ -49,6 +53,12 @@ public class AllDead {
static ArrayList<Object[]> holder;
@Setup(Level.Trial)
public void preRun() {
// Compact right now, kicking out all unrelated objects
System.gc();
}
@Setup(Level.Iteration)
public void generateGarbage() {
holder = GarbageGenerator.generateObjectArrays();

10
test/micro/org/openjdk/bench/vm/gc/systemgc/AllLive.java
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@ -26,16 +26,20 @@ import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.ArrayList;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.SingleShotTime)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(value=25, jvmArgs={"-Xmx5g", "-Xms5g", "-Xmn3g", "-XX:+AlwaysPreTouch"})
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@ -49,6 +53,12 @@ public class AllLive {
static ArrayList<Object[]> holder;
@Setup(Level.Trial)
public void preRun() {
// Compact right now, kicking out all unrelated objects
System.gc();
}
@Setup(Level.Iteration)
public void generateGarbage() {
holder = GarbageGenerator.generateObjectArrays();

10
test/micro/org/openjdk/bench/vm/gc/systemgc/DifferentObjectSizesArray.java
View File

@ -26,15 +26,19 @@ import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.SingleShotTime)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(value=25, jvmArgs={"-Xmx5g", "-Xms5g", "-Xmn3g", "-XX:+AlwaysPreTouch"})
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@ -49,6 +53,12 @@ public class DifferentObjectSizesArray {
static Object[] largeObjArray;
@Setup(Level.Trial)
public void preRun() {
// Compact right now, kicking out all unrelated objects
System.gc();
}
@Setup(Level.Iteration)
public void generateGarbage() {
largeObjArray = GarbageGenerator.generateAndFillLargeObjArray(false);

10
test/micro/org/openjdk/bench/vm/gc/systemgc/DifferentObjectSizesHashMap.java
View File

@ -26,16 +26,20 @@ import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.HashMap;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.SingleShotTime)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(value=25, jvmArgs={"-Xmx5g", "-Xms5g", "-Xmn3g", "-XX:+AlwaysPreTouch"})
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@ -50,6 +54,12 @@ public class DifferentObjectSizesHashMap {
static HashMap<Integer, byte[]> largeMap;
@Setup(Level.Trial)
public void preRun() {
// Compact right now, kicking out all unrelated objects
System.gc();
}
@Setup(Level.Iteration)
public void generateGarbage() {
largeMap = GarbageGenerator.generateAndFillHashMap(false);

10
test/micro/org/openjdk/bench/vm/gc/systemgc/DifferentObjectSizesTreeMap.java
View File

@ -26,16 +26,20 @@ import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.TreeMap;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.SingleShotTime)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(value=25, jvmArgs={"-Xmx5g", "-Xms5g", "-Xmn3g", "-XX:+AlwaysPreTouch"})
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@ -49,6 +53,12 @@ public class DifferentObjectSizesTreeMap {
*/
static TreeMap<Integer, byte[]> largeMap;
@Setup(Level.Trial)
public void preRun() {
// Compact right now, kicking out all unrelated objects
System.gc();
}
@Setup(Level.Iteration)
public void generateGarbage() {
largeMap = GarbageGenerator.generateAndFillTreeMap(false);

10
test/micro/org/openjdk/bench/vm/gc/systemgc/HalfDeadFirstPart.java
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@ -26,16 +26,20 @@ import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.ArrayList;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.SingleShotTime)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(value=25, jvmArgs={"-Xmx5g", "-Xms5g", "-Xmn3g", "-XX:+AlwaysPreTouch"})
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@ -50,6 +54,12 @@ public class HalfDeadFirstPart {
static ArrayList<Object[]> holder;
@Setup(Level.Trial)
public void preRun() {
// Compact right now, kicking out all unrelated objects
System.gc();
}
@Setup(Level.Iteration)
public void generateGarbage() {
holder = GarbageGenerator.generateObjectArrays();

10
test/micro/org/openjdk/bench/vm/gc/systemgc/HalfDeadInterleaved.java
View File

@ -26,16 +26,20 @@ import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.ArrayList;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.SingleShotTime)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(value=25, jvmArgs={"-Xmx5g", "-Xms5g", "-Xmn3g", "-XX:+AlwaysPreTouch"})
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@ -50,6 +54,12 @@ public class HalfDeadInterleaved {
static ArrayList<Object[]> holder;
@Setup(Level.Trial)
public void preRun() {
// Compact right now, kicking out all unrelated objects
System.gc();
}
@Setup(Level.Iteration)
public void generateGarbage() {
holder = GarbageGenerator.generateObjectArrays();

10
test/micro/org/openjdk/bench/vm/gc/systemgc/HalfDeadInterleavedChunks.java
View File

@ -26,16 +26,20 @@ import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.ArrayList;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.SingleShotTime)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(value=25, jvmArgs={"-Xmx5g", "-Xms5g", "-Xmn3g", "-XX:+AlwaysPreTouch"})
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@ -50,6 +54,12 @@ public class HalfDeadInterleavedChunks {
static ArrayList<Object[]> holder;
@Setup(Level.Trial)
public void preRun() {
// Compact right now, kicking out all unrelated objects
System.gc();
}
@Setup(Level.Iteration)
public void generateGarbage() {
holder = GarbageGenerator.generateObjectArrays();

10
test/micro/org/openjdk/bench/vm/gc/systemgc/HalfDeadSecondPart.java
View File

@ -26,16 +26,20 @@ import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.ArrayList;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.SingleShotTime)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(value=25, jvmArgs={"-Xmx5g", "-Xms5g", "-Xmn3g", "-XX:+AlwaysPreTouch"})
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@ -50,6 +54,12 @@ public class HalfDeadSecondPart {
static ArrayList<Object[]> holder;
@Setup(Level.Trial)
public void preRun() {
// Compact right now, kicking out all unrelated objects
System.gc();
}
@Setup(Level.Iteration)
public void generateGarbage() {
holder = GarbageGenerator.generateObjectArrays();

10
test/micro/org/openjdk/bench/vm/gc/systemgc/HalfHashedHalfDead.java
View File

@ -26,16 +26,20 @@ import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.ArrayList;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.SingleShotTime)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(value=25, jvmArgs={"-Xmx5g", "-Xms5g", "-Xmn3g", "-XX:+AlwaysPreTouch"})
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@ -50,6 +54,12 @@ public class HalfHashedHalfDead {
static ArrayList<Object[]> holder;
@Setup(Level.Trial)
public void preRun() {
// Compact right now, kicking out all unrelated objects
System.gc();
}
@Setup(Level.Iteration)
public void generateGarbage() {
holder = GarbageGenerator.generateObjectArrays();

15
test/micro/org/openjdk/bench/vm/gc/systemgc/NoObjects.java
View File

@ -25,14 +25,23 @@ package org.openjdk.bench.vm.gc.systemgc;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.SingleShotTime)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(value=25, jvmArgs={"-Xmx5g", "-Xms5g", "-Xmn3g", "-XX:+AlwaysPreTouch"})
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
public class NoObjects {
/*
@ -43,6 +52,12 @@ public class NoObjects {
* test for consistency.
*/
@Setup(Level.Trial)
public void preRun() {
// Compact right now, kicking out all unrelated objects
System.gc();
}
@Benchmark
public void gc() {
System.gc();

10
test/micro/org/openjdk/bench/vm/gc/systemgc/OneBigObject.java
View File

@ -26,15 +26,19 @@ import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.SingleShotTime)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(value=25, jvmArgs={"-Xmx5g", "-Xms5g", "-Xmn3g", "-XX:+AlwaysPreTouch"})
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@ -49,6 +53,12 @@ public class OneBigObject {
static Object[] holder;
@Setup(Level.Trial)
public void preRun() {
// Compact right now, kicking out all unrelated objects
System.gc();
}
@Setup(Level.Iteration)
public void generateGarbage() {
holder = new Object[1024*1024*128];