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kcrimsonkcrimson
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initial commit after refactoring from monorepo
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‎.gitignore

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target

‎pom.xml

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<!--
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Copyright (c) 2014, Oracle America, Inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Oracle nor the names of its contributors may be used
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to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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THE POSSIBILITY OF SUCH DAMAGE.
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-->
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>pl.symentis.jvm.microbenchmarks</groupId>
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<artifactId>microbenchmarks</artifactId>
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<version>1.0</version>
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<packaging>jar</packaging>
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<name>JMH benchmark sample: Java</name>
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<dependencies>
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<dependency>
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<groupId>org.openjdk.jmh</groupId>
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<artifactId>jmh-core</artifactId>
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<version>${jmh.version}</version>
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</dependency>
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<dependency>
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<groupId>org.openjdk.jmh</groupId>
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<artifactId>jmh-generator-annprocess</artifactId>
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<version>${jmh.version}</version>
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<scope>provided</scope>
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</dependency>
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</dependencies>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<!-- JMH version to use with this project. -->
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<jmh.version>1.36</jmh.version>
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<!--Name of the benchmark Uber-JAR to generate. -->
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<uberjar.name>benchmarks</uberjar.name>
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</properties>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.11.0</version>
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<configuration>
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<source>17</source>
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<target>17</target>
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</configuration>
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</plugin>
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<plugin>
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<groupId>com.diffplug.spotless</groupId>
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<artifactId>spotless-maven-plugin</artifactId>
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<version>2.36.0</version>
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<configuration>
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<java>
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<palantirJavaFormat/>
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</java>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-shade-plugin</artifactId>
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<version>3.2.1</version>
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<executions>
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<execution>
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<phase>package</phase>
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<goals>
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<goal>shade</goal>
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</goals>
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<configuration>
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<finalName>${uberjar.name}</finalName>
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<transformers>
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<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
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<mainClass>org.openjdk.jmh.Main</mainClass>
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</transformer>
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<transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
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</transformers>
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<filters>
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<filter>
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<!--
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Shading signed JARs will fail without this.
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http://stackoverflow.com/questions/999489/invalid-signature-file-when-attempting-to-run-a-jar
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-->
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<artifact>*:*</artifact>
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<excludes>
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<exclude>META-INF/*.SF</exclude>
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<exclude>META-INF/*.DSA</exclude>
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<exclude>META-INF/*.RSA</exclude>
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</excludes>
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</filter>
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</filters>
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</configuration>
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</execution>
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</executions>
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</plugin>
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</plugins>
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<pluginManagement>
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<plugins>
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<plugin>
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<artifactId>maven-clean-plugin</artifactId>
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<version>2.5</version>
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</plugin>
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<plugin>
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<artifactId>maven-deploy-plugin</artifactId>
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<version>2.8.1</version>
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</plugin>
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<plugin>
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<artifactId>maven-install-plugin</artifactId>
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<version>2.5.1</version>
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</plugin>
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<plugin>
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<artifactId>maven-jar-plugin</artifactId>
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<version>2.4</version>
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</plugin>
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<plugin>
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<artifactId>maven-javadoc-plugin</artifactId>
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<version>2.9.1</version>
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</plugin>
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<plugin>
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<artifactId>maven-resources-plugin</artifactId>
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<version>2.6</version>
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</plugin>
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<plugin>
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<artifactId>maven-site-plugin</artifactId>
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<version>3.3</version>
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</plugin>
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<plugin>
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<artifactId>maven-source-plugin</artifactId>
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<version>2.2.1</version>
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</plugin>
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<plugin>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>2.17</version>
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</plugin>
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</plugins>
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</pluginManagement>
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</build>
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</project>

‎src/main/docker/Dockerfile

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FROM eclipse-temurin:17
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ADD https://github.com/async-profiler/async-profiler/releases/download/v2.10/async-profiler-2.10-linux-x64.tar.gz /opt/async-profiler.tar.gz
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ADD https://chriswhocodes.com/hsdis/hsdis-amd64.so /opt/java/openjdk/lib/server/
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RUN apt update && apt install --yes linux-tools-generic && \
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mkdir /opt/async-profiler && tar xzvf /opt/async-profiler.tar.gz --strip 1 -C /opt/async-profiler
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ENV JMH_PERF=/usr/lib/linux-tools/5.4.0-150-generic/perf LD_LIBRARY_PATH=/opt/async-profiler/lib/

‎src/main/java/pl/symentis/jvm/jit/Fibonnaci.java

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package pl.symentis.jvm.jit;
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public class Fibonnaci {
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public static long fibonacci(int n) {
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if (n <= 1) {
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return n;
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} else {
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return fibonacci(n - 1) + fibonacci(n - 2);
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}
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}
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public static void main(String[] args) {
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long time = System.currentTimeMillis();
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for (int i = 0; i < 200; i++) {
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fibonacci(32);
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}
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time = System.currentTimeMillis() - time;
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System.out.printf("time is %d\n", time);
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}
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}

‎src/main/java/pl/symentis/jvm/jit/FibonnaciIterative.java

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package pl.symentis.jvm.jit;
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public class FibonnaciIterative {
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public static long fibonacci(int n) {
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if (n <= 1) {
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return n;
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}
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int fib = 1;
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int prevFib = 1;
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for (int i = 2; i < n; i++) {
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int temp = fib;
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fib += prevFib;
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prevFib = temp;
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}
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return fib;
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}
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public static void main(String[] args) {
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long time = System.currentTimeMillis();
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for (int i = 0; i < 200; i++) {
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fibonacci(32);
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}
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time = System.currentTimeMillis() - time;
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System.out.printf("time is %d\n", time);
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}
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}

‎src/main/java/pl/symentis/jvm/jit/NullCheckFolding.java

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package pl.symentis.jvm.jit;
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/**
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* java -XX:+UnlockDiagnosticVMOptions -XX:CompileCommand="print *.nullCheckFolding" -Xlog:jit+compilation=debug pl.symentis.jvm.jit.NullCheckFolding
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*/
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public class NullCheckFolding {
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public static void assertNotNull(Object obj) {
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if (obj == null) {
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System.out.println(String.format("%s is null", obj));
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}
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}
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public void nullCheckFolding() {
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assertNotNull(this);
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}
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public static void main(String[] argv) {
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NullCheckFolding nullCheckFolding = new NullCheckFolding();
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for (int i = 0; i < 200000; i++) {
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nullCheckFolding.nullCheckFolding();
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}
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}
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}

‎src/main/java/pl/symentis/jvm/jit/UncommonTrap.java

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package pl.symentis.jvm.jit;
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public class UncommonTrap {
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private static final int CHUNK_SIZE = 1000;
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private static Object uncommonTrap(Object trap) {
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if (trap != null) {
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System.out.println("I am being trapped!");
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}
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return null;
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}
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public static void main(String[] argv) {
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Object trap = null;
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for (int i = 0; i < 400; ++i) {
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for (int j = 0; j < CHUNK_SIZE; ++j) {
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uncommonTrap(trap);
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}
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if (i == 300) {
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trap = new Object();
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}
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}
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}
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}

‎src/main/java/pl/symentis/jvm/jit/UncommonTrapTypeProfile.java

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package pl.symentis.jvm.jit;
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public class UncommonTrapTypeProfile {
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private static final int CHUNK_SIZE = 1000;
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public static void main(String[] argv) {
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Calculate trap = new Sum();
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for (int i = 0; i < 400; ++i) {
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for (int j = 0; j < CHUNK_SIZE; ++j) {
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trap.calc(i, j);
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}
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if (i == 300) {
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trap = new Multiplay();
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}
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}
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}
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interface Calculate {
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int calc(int i, int j);
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}
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static class Sum implements Calculate {
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@Override
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public int calc(int i, int j) {
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return i + j;
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}
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}
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static class Multiplay implements Calculate {
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@Override
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public int calc(int i, int j) {
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return i * j;
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}
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}
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}

‎src/main/java/pl/symentis/jvm/microbenchmarks/autovector/Autovectorization.java

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package pl.symentis.jvm.microbenchmarks.autovector;
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import java.util.Random;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.Fork;
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import org.openjdk.jmh.annotations.Level;
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import org.openjdk.jmh.annotations.Measurement;
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import org.openjdk.jmh.annotations.Param;
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import org.openjdk.jmh.annotations.Scope;
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import org.openjdk.jmh.annotations.Setup;
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import org.openjdk.jmh.annotations.State;
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import org.openjdk.jmh.annotations.Warmup;
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import org.openjdk.jmh.infra.Blackhole;
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@Fork(value = 1)
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@Measurement(iterations = 1)
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@Warmup(iterations = 1)
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public class Autovectorization {
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@State(Scope.Benchmark)
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public static class Vectors {
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@Param({"1000", "100000", "100000000"})
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public int streamSize = 100_000_000;
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private double[] xs;
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private double[] ys;
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private double[] zs;
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@Setup(Level.Iteration)
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public void setUp() {
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var random = new Random();
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this.xs = random.doubles(streamSize).toArray();
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ys = random.doubles(streamSize).toArray();
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zs = new double[streamSize];
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}
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}
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@Benchmark
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public void autoVector(Vectors iv, Blackhole bh) {
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for (int i = 0; i < iv.streamSize; i++) {
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iv.zs[i] = ((iv.xs[i] * iv.ys[i]) + 1) * -1;
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}
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bh.consume(iv.zs);
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}
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@Fork(jvmArgsAppend = {"-XX:-UseSuperWord"})
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@Benchmark
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public void noVector(Vectors iv, Blackhole bh) {
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for (int i = 0; i < iv.streamSize; i++) {
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iv.zs[i] = ((iv.xs[i] * iv.ys[i]) + 1) * -1;
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}
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bh.consume(iv.zs);
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}
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}

‎src/main/java/pl/symentis/jvm/microbenchmarks/counters/AtomicCounter.java

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package pl.symentis.jvm.microbenchmarks.counters;
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import java.util.concurrent.atomic.AtomicInteger;
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public class AtomicCounter {
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private AtomicInteger counter = new AtomicInteger();
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void inc() {
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counter.incrementAndGet();
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}
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int value() {
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return counter.get();
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}
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}

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