initial commit of test application

.gitignore

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+perf-workshop.iws
+perf-workshop.ipr
+perf-workshop.iml
+
+out/
+build/
+gradle/

README.md

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+System Jitter Utility
+=====================
+
+A test program for determining causes of jitter.
+

build.gradle

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+/*
+ * Copyright 2015 LMAX Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+apply plugin: 'java'
+apply plugin: 'idea'
+apply plugin: 'eclipse'
+apply plugin: 'checkstyle'
+
+defaultTasks 'checkstyleMain', 'checkstyleTest', 'build'
+
+version = new Version(major: 0, revision: 1)
+
+ext {
+    fullName = 'Perf Workshop'
+    fullDescription = 'Perf Workshop example code'
+    teamName = ''
+    siteUrl = 'http://lmax.com'
+    sourceUrl = ''
+
+    javaCompilerExecutable = System.env['JAVA_HOME'] ? System.env['JAVA_HOME'] + '/bin/javac' : 'javac'
+}
+
+sourceSets {
+    main {
+        java {
+            srcDir 'src/main/java'
+        }
+    }
+
+    test {
+        java {
+            srcDir 'src/test/java'
+        }
+        resources {
+            srcDir 'src/test/resources'
+        }
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compile 'com.lmax:disruptor:3.3.2', 'org.hdrhistogram:HdrHistogram:2.1.4', 'com.google.code.gson:gson:2.3.1', 'com.beust:jcommander:1.48', 'com.higherfrequencytrading:affinity:1.7'
+
+}
+
+sourceCompatibility = 1.8
+targetCompatibility = 1.8
+
+jar {
+    baseName = project.name
+
+    manifest.attributes('Built-By': System.properties['user.name'],
+                        'Bundle-Name': fullName,
+                        'Bundle-Vendor': teamName,
+                        'Bundle-Description': fullDescription,
+                        'Bundle-DocURL': siteUrl)
+}
+
+task sourcesJar(type: Jar) {
+    classifier = 'sources'
+    from sourceSets.main.allSource
+}
+
+task javadocJar(type: Jar, dependsOn: javadoc) {
+    classifier = 'javadoc'
+    from javadoc.destinationDir
+}
+
+task fatJar(type: Jar) {
+    manifest {
+        attributes 'Implementation-Title': 'Gradle Jar File Example',
+                'Implementation-Version': version
+    }
+    baseName = project.name + '-all'
+    from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
+    with jar
+}
+
+
+artifacts {
+    archives sourcesJar, javadocJar
+}
+
+checkstyle {
+    toolVersion = "6.3"
+}
+
+task wrapper(type: Wrapper) {
+    gradleVersion = '2.2'
+}
+
+class Version {
+    int major, minor = 0, revision = 0
+    boolean snapshot
+    String stage
+
+    String toString() {
+        "$major.$minor.$revision${stage ? '.' + stage : ''}${snapshot ? '-SNAPSHOT' : ''}"
+    }
+}
+

gradlew

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+#!/usr/bin/env bash
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn ( ) {
+    echo "$*"
+}
+
+die ( ) {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+esac
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched.
+if $cygwin ; then
+    [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+fi
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >&-
+APP_HOME="`pwd -P`"
+cd "$SAVED" >&-
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
+function splitJvmOpts() {
+    JVM_OPTS=("$@")
+}
+eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
+JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+
+exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"

settings.gradle

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+rootProject.name = 'perf-workshop'

src/main/java/com/epickrram/workshop/perf/app/AppMain.java

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+package com.epickrram.workshop.perf.app;
+
+//////////////////////////////////////////////////////////////////////////////////
+//   Copyright 2015   Mark Price     mark at epickrram.com                      //
+//                                                                              //
+//   Licensed under the Apache License, Version 2.0 (the "License");            //
+//   you may not use this file except in compliance with the License.           //
+//   You may obtain a copy of the License at                                    //
+//                                                                              //
+//       http://www.apache.org/licenses/LICENSE-2.0                             //
+//                                                                              //
+//   Unless required by applicable law or agreed to in writing, software        //
+//   distributed under the License is distributed on an "AS IS" BASIS,          //
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   //
+//   See the License for the specific language governing permissions and        //
+//   limitations under the License.                                             //
+//////////////////////////////////////////////////////////////////////////////////
+
+
+import com.beust.jcommander.JCommander;
+import com.epickrram.workshop.perf.config.CommandLineArgs;
+import com.epickrram.workshop.perf.app.message.Packet;
+import com.epickrram.workshop.perf.app.processors.Accumulator;
+import com.epickrram.workshop.perf.app.processors.InputReader;
+import com.epickrram.workshop.perf.app.processors.Journaller;
+import com.epickrram.workshop.perf.config.Overrides;
+import com.epickrram.workshop.perf.support.Threads;
+import com.lmax.disruptor.BusySpinWaitStrategy;
+import com.lmax.disruptor.TimeoutException;
+import com.lmax.disruptor.dsl.Disruptor;
+import com.lmax.disruptor.dsl.ProducerType;
+import org.HdrHistogram.Histogram;
+
+import java.util.concurrent.TimeUnit;
+
+import static com.epickrram.workshop.perf.app.processors.EventHandlerAdapter.wrap;
+import static com.epickrram.workshop.perf.app.processors.ThreadAffinityEventHandler.runOnCpus;
+import static com.epickrram.workshop.perf.support.DaemonThreadFactory.DAEMON_THREAD_FACTORY;
+import static com.epickrram.workshop.perf.support.Histograms.HISTOGRAMS;
+import static com.epickrram.workshop.perf.support.SystemNanoTimer.SYSTEM_NANO_TIMER;
+import static com.epickrram.workshop.perf.support.Threads.THREADS;
+import static java.util.Arrays.setAll;
+import static java.util.concurrent.Executors.newCachedThreadPool;
+
+public final class AppMain
+{
+    public static void main(final String[] args) throws Exception
+    {
+        final CommandLineArgs commandLineArgs = new CommandLineArgs();
+        new JCommander(commandLineArgs).parse(args);
+
+        final Disruptor<Packet> packetDisruptor =
+                new Disruptor<>(new Packet.Factory(commandLineArgs.getRecordLength()), commandLineArgs.getBufferSize(),
+                        newCachedThreadPool(DAEMON_THREAD_FACTORY), ProducerType.SINGLE, new BusySpinWaitStrategy());
+
+        final Histogram[] histograms = new Histogram[commandLineArgs.getNumberOfIterations()];
+        setAll(histograms, HISTOGRAMS::createHistogramForArray);
+        final Journaller journaller = new Journaller(SYSTEM_NANO_TIMER, commandLineArgs);
+        journaller.init();
+
+        final Overrides overrides = new Overrides(commandLineArgs);
+        overrides.init();
+
+        packetDisruptor.handleEventsWith(
+                runOnCpus(wrap(new Accumulator(histograms, SYSTEM_NANO_TIMER, commandLineArgs)::process),
+                        overrides.getAccumulatorThreadAffinity()),
+                runOnCpus(wrap(journaller::process), overrides.getJournallerThreadAffinity()));
+
+        packetDisruptor.start();
+
+        final InputReader inputReader = new InputReader(packetDisruptor.getRingBuffer(), SYSTEM_NANO_TIMER, commandLineArgs);
+
+        final Thread thread = DAEMON_THREAD_FACTORY.newThread(THREADS.runOnCpu(inputReader::processFiles,
+                overrides.getProducerThreadAffinity()));
+        thread.start();
+
+        try
+        {
+            thread.join();
+            packetDisruptor.shutdown(1, TimeUnit.MINUTES);
+        }
+        catch (TimeoutException e)
+        {
+            throw new RuntimeException("Consumers did not process remaining events within timeout", e);
+        }
+        finally
+        {
+            packetDisruptor.halt();
+        }
+    }
+}