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Importing junit-benchmarks, initial.

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commit 9774147e3e6ada25795ea7104a0024fefaa978c2 0 parents
dawidweiss authored
7 .classpath
@@ -0,0 +1,7 @@
+<classpath>
+ <classpathentry kind="src" path="src/test/java" output="tmp/test-classes" including="**/*.java"/>
+ <classpathentry kind="src" path="src/main/java" including="**/*.java"/>
+ <classpathentry kind="output" path="tmp/classes"/>
+ <classpathentry kind="var" path="M2_REPO/junit/junit/4.7/junit-4.7.jar" sourcepath="M2_REPO/junit/junit/4.7/junit-4.7-sources.jar"/>
+ <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+</classpath>
13 .project
@@ -0,0 +1,13 @@
+<projectDescription>
+ <name>junit-benchmarks</name>
+ <comment/>
+ <projects/>
+ <buildSpec>
+ <buildCommand>
+ <name>org.eclipse.jdt.core.javabuilder</name>
+ </buildCommand>
+ </buildSpec>
+ <natures>
+ <nature>org.eclipse.jdt.core.javanature</nature>
+ </natures>
+</projectDescription>
5 .settings/org.eclipse.jdt.core.prefs
@@ -0,0 +1,5 @@
+#Fri Feb 05 12:56:17 CET 2010
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.source=1.5
+org.eclipse.jdt.core.compiler.compliance=1.5
202 junit-benchmarks.LICENSE
@@ -0,0 +1,202 @@
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1  junit-benchmarks.version
@@ -0,0 +1 @@
+junit-benchmarks.version=0.1-dev
50 pom.xml
@@ -0,0 +1,50 @@
+<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/maven-v4_0_0.xsd">
+
+ <modelVersion>4.0.0</modelVersion>
+ <groupId>com.carrotsearch</groupId>
+ <artifactId>junit-benchmarks</artifactId>
+ <version>0.1-SNAPSHOT</version>
+ <packaging>jar</packaging>
+
+ <properties>
+ <junit.version>4.7</junit.version>
+ </properties>
+
+ <build>
+ <directory>tmp/dist</directory>
+ <outputDirectory>tmp/classes</outputDirectory>
+ <testOutputDirectory>tmp/test-classes</testOutputDirectory>
+
+ <defaultGoal>install</defaultGoal>
+
+ <plugins>
+ <plugin>
+ <artifactId>maven-compiler-plugin</artifactId>
+ <configuration>
+ <encoding>UTF-8</encoding>
+ <source>1.5</source>
+ <target>1.5</target>
+ </configuration>
+ </plugin>
+
+ <plugin>
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-eclipse-plugin</artifactId>
+ <configuration>
+ <downloadJavadocs>true</downloadJavadocs>
+ <downloadSources>true</downloadSources>
+ </configuration>
+ </plugin>
+ </plugins>
+ </build>
+
+ <dependencies>
+ <dependency>
+ <groupId>junit</groupId>
+ <artifactId>junit</artifactId>
+ <version>${junit.version}</version>
+ <scope>compile</scope>
+ </dependency>
+ </dependencies>
+</project>
22 src/main/java/com/carrotsearch/junitbenchmarks/AbstractBenchmark.java
@@ -0,0 +1,22 @@
+package com.carrotsearch.junitbenchmarks;
+
+import org.junit.Rule;
+import org.junit.rules.MethodRule;
+
+/**
+ * A superclass for tests that should be executed as benchmarks (several rounds, GC and
+ * time accounting). Provides a JUnit rule in {@link #benchmarkRun} that runs the tests
+ * repeatedly, logging the intermediate results (memory usage, times).
+ * <p>
+ * Subclasses may add {@link BenchmarkOptions} at the class-level or to individual methods
+ * to override the defaults.
+ * </p>
+ */
+public abstract class AbstractBenchmark
+{
+ /**
+ * Enables the benchmark rule.
+ */
+ @Rule
+ public MethodRule benchmarkRun = new BenchmarkRule();
+}
40 src/main/java/com/carrotsearch/junitbenchmarks/Average.java
@@ -0,0 +1,40 @@
+package com.carrotsearch.junitbenchmarks;
+
+import java.util.Locale;
+
+/**
+ * Average with standard deviation.
+ */
+class Average
+{
+ final double avg;
+ final double stddev;
+
+ public Average(double avg, double stddev)
+ {
+ this.avg = avg;
+ this.stddev = stddev;
+ }
+
+ public String toString(double multiplier)
+ {
+ return String.format(Locale.ENGLISH, "%.2f [+- %.2f]", avg * multiplier,
+ stddev * multiplier);
+ }
+
+ public static Average from(long [] values)
+ {
+ long sum = 0;
+ long sumSquares = 0;
+
+ for (long l : values)
+ {
+ sum += l;
+ sumSquares += l * l;
+ }
+
+ double avg = sum / (double) values.length;
+ return new Average(sum / (double) values.length, Math.sqrt(sumSquares
+ / (double) values.length - avg * avg));
+ }
+}
27 src/main/java/com/carrotsearch/junitbenchmarks/BenchmarkOptions.java
@@ -0,0 +1,27 @@
+package com.carrotsearch.junitbenchmarks;
+
+import java.lang.annotation.*;
+
+/**
+ * Benchmark options applicable to methods annotated as tests.
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE, ElementType.METHOD})
+public @interface BenchmarkOptions
+{
+ /**
+ * @return Call {@link System#gc()} before each test. This may slow down the tests
+ * in a significant way, so disabling it is sensible in most cases.
+ */
+ boolean callgc() default false;
+
+ /**
+ * Sets the number of warmup rounds for the test. If negative, the default is taken.
+ */
+ int warmupRounds() default -1;
+
+ /**
+ * Sets the number of benchmark rounds for the test. If negative, the default is taken.
+ */
+ int benchmarkRounds() default -1;
+}
16 src/main/java/com/carrotsearch/junitbenchmarks/BenchmarkRule.java
@@ -0,0 +1,16 @@
+package com.carrotsearch.junitbenchmarks;
+
+import org.junit.rules.MethodRule;
+import org.junit.runners.model.FrameworkMethod;
+import org.junit.runners.model.Statement;
+
+/**
+ * A benchmark rule (causes tests to be repeated and measures).
+ */
+public final class BenchmarkRule implements MethodRule
+{
+ public Statement apply(Statement base, FrameworkMethod method, Object object)
+ {
+ return new BenchmarkStatement(base, method, object);
+ }
+}
184 src/main/java/com/carrotsearch/junitbenchmarks/BenchmarkStatement.java
@@ -0,0 +1,184 @@
+package com.carrotsearch.junitbenchmarks;
+
+import java.util.ArrayList;
+import java.util.Locale;
+
+import org.junit.runners.model.FrameworkMethod;
+import org.junit.runners.model.Statement;
+
+/**
+ * Benchmark evaluator statement.
+ */
+final class BenchmarkStatement extends Statement
+{
+ public final static String WARMUP_ROUNDS_PROPERTY = "rounds.warmup";
+ public final static String BENCHMARK_ROUNDS_PROPERTY = "rounds.benchmark";
+
+ public static final String IGNORE_ANNOTATION_OPTIONS_PROPERTY = "ignore.annotation.options";
+ public static final String IGNORE_CALLGC_PROPERTY = "ignore.callgc";
+
+ /**
+ * How many warmup runs should we execute for each test method?
+ */
+ final static int DEFAULT_WARMUP_ROUNDS = 5;
+
+ /**
+ * How many actual benchmark runs should we execute for each test method?
+ */
+ final static int DEFAULT_BENCHMARK_ROUNDS = 10;
+
+ /**
+ * If <code>true</code>, the local overrides using {@link BenchmarkOptions} are
+ * ignored and defaults (or globals passed via system properties) are used.
+ */
+ private boolean ignoreAnnotationOptions = Boolean
+ .getBoolean(IGNORE_ANNOTATION_OPTIONS_PROPERTY);
+
+ /**
+ * Disable all forced garbage collector calls.
+ */
+ private boolean ignoreCallGC = Boolean.getBoolean(IGNORE_CALLGC_PROPERTY);
+
+ private final Object target;
+ private final FrameworkMethod method;
+ private final Statement base;
+ private final BenchmarkOptions options;
+
+ @BenchmarkOptions
+ @SuppressWarnings("unused")
+ private void defaultOptions()
+ {
+ }
+
+ /* */
+ public BenchmarkStatement(Statement base, FrameworkMethod method, Object object)
+ {
+ this.base = base;
+ this.method = method;
+ this.target = object;
+
+ this.options = resolveOptions(method, object);
+ }
+
+ private BenchmarkOptions resolveOptions(FrameworkMethod method, Object object)
+ {
+ // Method-level override.
+ BenchmarkOptions options = method.getAnnotation(BenchmarkOptions.class);
+ if (options != null) return options;
+
+ // Class-level override. Look for annotations in this and superclasses.
+ Class<?> clz = object.getClass();
+ while (clz != null)
+ {
+ options = clz.getAnnotation(BenchmarkOptions.class);
+ if (options != null) return options;
+
+ clz = clz.getSuperclass();
+ }
+
+ // Defaults.
+ try
+ {
+ return getClass().getDeclaredMethod("defaultOptions").getAnnotation(
+ BenchmarkOptions.class);
+ }
+ catch (Exception e)
+ {
+ throw new RuntimeException(e);
+ }
+ }
+
+ @Override
+ public void evaluate() throws Throwable
+ {
+ final int warmupRounds = getIntOption(options.warmupRounds(),
+ WARMUP_ROUNDS_PROPERTY, DEFAULT_WARMUP_ROUNDS);
+
+ final int benchmarkRounds = getIntOption(options.benchmarkRounds(),
+ BENCHMARK_ROUNDS_PROPERTY, DEFAULT_BENCHMARK_ROUNDS);
+
+ final int totalRounds = warmupRounds + benchmarkRounds;
+
+ final ArrayList<Result> results = new ArrayList<Result>(totalRounds);
+
+ GCSnapshot gcSnapshot = null;
+ long warmupTime = System.currentTimeMillis();
+ long benchmarkTime = 0;
+ for (int i = 0; i < totalRounds; i++)
+ {
+ // We assume no reordering will take place here.
+ final long startTime = System.currentTimeMillis();
+ cleanupMemory();
+ final long afterGC = System.currentTimeMillis();
+
+ if (i == warmupRounds)
+ {
+ gcSnapshot = new GCSnapshot();
+ benchmarkTime = System.currentTimeMillis();
+ warmupTime = benchmarkTime - warmupTime;
+ }
+
+ base.evaluate();
+ final long endTime = System.currentTimeMillis();
+
+ results.add(new Result(startTime, afterGC, endTime));
+ }
+ benchmarkTime = System.currentTimeMillis() - benchmarkTime;
+
+ final Statistics stats = Statistics.from(results.subList(warmupRounds,
+ totalRounds));
+
+ /*
+ * TODO: this should be extensible (emitting results via an interface, with
+ * one of the possible implementations dumping to the console.
+ */
+ System.out
+ .println(String
+ .format(
+ Locale.ENGLISH,
+ "%-50s: %d/%d rounds, time.total: %.2f, time.warmup: %.2f, time.bench: %.2f, round: %s, round.gc: %s, GC.calls: %d, GC.time: %.2f",
+ target.getClass().getSimpleName() + "." + method.getName(),
+ benchmarkRounds, totalRounds, (warmupTime + benchmarkTime) * 0.001,
+ warmupTime * 0.001, benchmarkTime * 0.001, stats.evaluation
+ .toString(0.001), stats.gc.toString(0.001), gcSnapshot
+ .accumulatedInvocations(), gcSnapshot.accumulatedTime() / 1000.0));
+ }
+
+ /**
+ * Best effort attempt to clean up the memory if {@link BenchmarkOptions#callgc()} is
+ * enabled.
+ */
+ private void cleanupMemory()
+ {
+ if (ignoreCallGC) return;
+
+ if (!options.callgc()) return;
+
+ /*
+ * Best-effort GC invocation. I really don't know of any other way to ensure a GC
+ * pass.
+ */
+ System.gc();
+ System.gc();
+ Thread.yield();
+ }
+
+ /**
+ * Get an integer from system properties.
+ */
+ private int getIntOption(int localValue, String property, int defaultValue)
+ {
+ final String v = System.getProperty(property);
+ if (v != null && v.trim().length() > 0)
+ {
+ defaultValue = Integer.parseInt(v);
+ }
+
+ if (ignoreAnnotationOptions || localValue < 0)
+ {
+ return defaultValue;
+ }
+
+ return localValue;
+ }
+}
48 src/main/java/com/carrotsearch/junitbenchmarks/GCSnapshot.java
@@ -0,0 +1,48 @@
+package com.carrotsearch.junitbenchmarks;
+
+import java.lang.management.GarbageCollectorMXBean;
+import java.lang.management.ManagementFactory;
+import java.util.List;
+
+/**
+ * Snapshot of GC activity (cumulative for all GC types).
+ */
+class GCSnapshot
+{
+ private static List<GarbageCollectorMXBean> garbageBeans = ManagementFactory
+ .getGarbageCollectorMXBeans();
+
+ private long [] gcInvocations = new long [garbageBeans.size()];
+ private long [] gcTimes = new long [garbageBeans.size()];
+
+ public GCSnapshot()
+ {
+ for (int i = 0; i < gcInvocations.length; i++)
+ {
+ gcInvocations[i] = garbageBeans.get(i).getCollectionCount();
+ gcTimes[i] = garbageBeans.get(i).getCollectionTime();
+ }
+ }
+
+ public long accumulatedInvocations()
+ {
+ long sum = 0;
+ int i = 0;
+ for (GarbageCollectorMXBean bean : garbageBeans)
+ {
+ sum += bean.getCollectionCount() - gcInvocations[i++];
+ }
+ return sum;
+ }
+
+ public long accumulatedTime()
+ {
+ long sum = 0;
+ int i = 0;
+ for (GarbageCollectorMXBean bean : garbageBeans)
+ {
+ sum += bean.getCollectionTime() - gcTimes[i++];
+ }
+ return sum;
+ }
+}
28 src/main/java/com/carrotsearch/junitbenchmarks/Result.java
@@ -0,0 +1,28 @@
+package com.carrotsearch.junitbenchmarks;
+
+/**
+ * A result of a single test.
+ */
+class Result
+{
+ public final long startTime;
+ public final long afterGC;
+ public final long endTime;
+
+ public Result(long startTime, long afterGC, long endTime)
+ {
+ this.startTime = startTime;
+ this.afterGC = afterGC;
+ this.endTime = endTime;
+ }
+
+ public long gcTime()
+ {
+ return afterGC - startTime;
+ }
+
+ public long evaluationTime()
+ {
+ return endTime - afterGC;
+ }
+}
30 src/main/java/com/carrotsearch/junitbenchmarks/Statistics.java
@@ -0,0 +1,30 @@
+package com.carrotsearch.junitbenchmarks;
+
+import java.util.List;
+
+/**
+ * Statistics from multiple {@link Result}s.
+ */
+class Statistics
+{
+ public Average gc;
+ public Average evaluation;
+
+ public static Statistics from(List<Result> results)
+ {
+ final Statistics stats = new Statistics();
+ long [] times = new long [results.size()];
+
+ // GC-times.
+ for (int i = 0; i < times.length; i++)
+ times[i] = results.get(i).gcTime();
+ stats.gc = Average.from(times);
+
+ // Evaluation-only times.
+ for (int i = 0; i < times.length; i++)
+ times[i] = results.get(i).evaluationTime();
+ stats.evaluation = Average.from(times);
+
+ return stats;
+ }
+}
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