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BAEL-3855

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identation, moved to new module, removed needless classes, better benchmark
This commit is contained in:
Unknown 2020-02-21 14:17:46 +01:00
parent d144322c45
commit d01b7be0b6
6 changed files with 127 additions and 166 deletions
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2
lock-striping/pom.xml
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@ -1,7 +1,7 @@
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion> <modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung.concurrent.lock</groupId> <groupId>com.baeldung.concurrent.lock</groupId>
<artifactId>lock-striping</artifactId> <artifactId>core-java-concurrency-collections-2</artifactId>
<version>0.0.1-SNAPSHOT</version> <version>0.0.1-SNAPSHOT</version>
<properties> <properties>

15
lock-striping/src/com/baeldung/concurrent/lock/BenchMark.java
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@ -6,6 +6,7 @@ import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.annotations.Benchmark; import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode; import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement; import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode; import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit; import org.openjdk.jmh.annotations.OutputTimeUnit;
@ -16,24 +17,18 @@ import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup; import org.openjdk.jmh.annotations.Warmup;
@State(Scope.Thread) @State(Scope.Thread)
@Warmup(iterations = 2, time = 1, timeUnit = TimeUnit.MILLISECONDS) @Fork(value = 2)
@Measurement(iterations = 3, time = 1, timeUnit = TimeUnit.MILLISECONDS) @Warmup(iterations = 3)
public class BenchMark { public class BenchMark {
ConcurrentAccessMap accessMyMap; ConcurrentAccessMap accessMyMap;
@Param({"HashMap", "HashMap with Lock", "HashMap with Striped Lock", @Param({"HashMap with Lock", "HashMap with Striped Lock",
"ConcurrentHashMap", "ConcurrentHashMap with Lock", "ConcurrentHashMap with Striped Lock"}) "ConcurrentHashMap with Lock", "ConcurrentHashMap with Striped Lock"})
private String type; private String type;
@Setup @Setup
public void setup() { public void setup() {
switch (type) { switch (type) {
case "HashMap":
accessMyMap = new NoLock(getHashMap());
break;
case "ConcurrentHashMap":
accessMyMap = new NoLock(getConcurrentHashMap());
break;
case "HashMap with Lock": case "HashMap with Lock":
accessMyMap = new CoarseGrained(getHashMap()); accessMyMap = new CoarseGrained(getHashMap());
break; break;

2
lock-striping/src/com/baeldung/concurrent/lock/ConcurrentAccessMap.java
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@ -10,7 +10,7 @@ public abstract class ConcurrentAccessMap {
static final int THREADS = 10000; static final int THREADS = 10000;
static final int BUCKETS = Runtime.getRuntime().availableProcessors() * SLOTS; static final int BUCKETS = Runtime.getRuntime().availableProcessors() * SLOTS;
private CompletableFuture<?>[] requests; private CompletableFuture<?>[] requests;
Map<String, String> map; protected Map<String, String> map;
public ConcurrentAccessMap(Map<String, String> map) { public ConcurrentAccessMap(Map<String, String> map) {
this.map = map; this.map = map;

34
lock-striping/src/com/baeldung/concurrent/lock/NoLock.java
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@ -1,34 +0,0 @@
package com.baeldung.concurrent.lock;
import java.util.Map;
import com.google.common.base.Supplier;
public class NoLock extends ConcurrentAccessMap {
public NoLock(Map<String, String> map) {
super(map);
}
protected Supplier<?> putSupplier(int x) {
return (()-> {
boolean done = false;
while(!done) {
map.put("key" + x, "value" + x);
done = true;
}
return null;
});
}
protected Supplier<?> getSupplier(int x) {
return (()-> {
boolean done = false;
while(!done) {
map.get("key" + x);
done = true;
}
return null;
});
}
}