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Commit ada5a3f

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jabrenajabrena
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Merge branch 'release/v0.1.0'
2 parents 37e6922 + 50de72c commit ada5a3f
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‎.gitignore

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# Compiled class file
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*.class
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.gradle
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.idea
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build
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*.iml
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# Log file
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*.log
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# BlueJ files
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*.ctxt
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# Mobile Tools for Java (J2ME)
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.mtj.tmp/
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# Package Files #
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*.jar
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*.war
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*.ear
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*.zip
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*.tar.gz
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*.rar
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# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
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hs_err_pid*

‎README.md

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# jvm-benchmark
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A JVM benchmark
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A JVM benchmark for EV3.
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In a EV3 Brick managed with EV3Dev, it is possible to install some [JVM](https://wiki.debian.org/Java/):
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- [Oracle Java 8 SE Embedded](http://www.oracle.com/technetwork/java/embedded/downloads/javase/javaseemeddedev3-1982511.html)
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- [OpenJDK 8 Headless](https://packages.debian.org/jessie-backports/openjdk-8-jdk-headless)
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If you have a Brick with both JRE (Oracle & OpenJDK), this project could
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help you to know what JVM has better performance.
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## The benchmark script:
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```
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#!/bin/bash
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start=`date +%s`
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/usr/lib/jvm/java-8-openjdk-armel/jre/bin/java -server -jar jvm-benchmark-all-0.1.0-SNAPSHOT.jar
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end=`date +%s`
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runtime=$((end-start))
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echo $runtime
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start=`date +%s`
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/opt/ejdk1.8.0/linux_arm_sflt/jre/bin/java -server -jar jvm-benchmark-all-0.1.0-SNAPSHOT.jar
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end=`date +%s`
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runtime=$((end-start))
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echo $runtime
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```
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## The results:
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```
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robot@ev3dev:~$ ./benchmark.sh
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GeneralBench 1.2
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6 byte[16384] manual copies: 182 ms 540131 bytes/sec
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1220 byte[16384] arraycopies: 360 ms 55523555 bytes/sec
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24 int[4096] manual copies: 200 ms 1966080 bytes/sec
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1220 int[4096] arraycopies: 361 ms 55369750 bytes/sec
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200000 byte add: 67 ms 2985074 ops/sec
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200000 byte sub: 60 ms 3333333 ops/sec
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200000 byte mul: 63 ms 3174603 ops/sec
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200000 byte div: 95 ms 2105263 ops/sec
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200000 short add: 102 ms 1960784 ops/sec
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200000 short sub: 91 ms 2197802 ops/sec
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200000 short mul: 79 ms 2531645 ops/sec
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200000 short div: 115 ms 1739130 ops/sec
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200000 char add: 68 ms 2941176 ops/sec
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200000 char sub: 89 ms 2247191 ops/sec
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200000 char mul: 77 ms 2597402 ops/sec
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200000 char div: 149 ms 1342281 ops/sec
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200000 int add: 69 ms 2898550 ops/sec
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200000 int sub: 74 ms 2702702 ops/sec
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200000 int mul: 86 ms 2325581 ops/sec
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200000 int div: 106 ms 1886792 ops/sec
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200000 long add: 77 ms 2597402 ops/sec
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200000 long sub: 83 ms 2409638 ops/sec
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200000 long mul: 102 ms 1960784 ops/sec
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200000 long div: 232 ms 862068 ops/sec
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200000 float add: 103 ms 1941747 ops/sec
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200000 float sub: 112 ms 1785714 ops/sec
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200000 float mul: 104 ms 1923076 ops/sec
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200000 float div: 175 ms 1142857 ops/sec
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200000 double add: 124 ms 1612903 ops/sec
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200000 double sub: 127 ms 1574803 ops/sec
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200000 double mul: 101 ms 1980198 ops/sec
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200000 double div: 527 ms 379506 ops/sec
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200000 method calls: 880 ms 227272 ops/sec
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200000 static method calls: 868 ms 230414 ops/sec
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2000 string concats: 2896 ms 690 ops/sec
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20000 string compares (easy): 605 ms 33057 ops/sec
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1000 string compares (hard): 22 ms 45454 ops/sec
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20000 object creations: 853 ms 23446 ops/sec
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6242048 Total Loop Executions: 21614 ms 288796 loops/sec
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Note: each Loop Execution includes multiple Java operations
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100
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GeneralBench 1.2
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6 byte[16384] manual copies: 87 ms 1129931 bytes/sec
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1220 byte[16384] arraycopies: 162 ms 123385679 bytes/sec
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24 int[4096] manual copies: 111 ms 3542486 bytes/sec
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1220 int[4096] arraycopies: 144 ms 138808888 bytes/sec
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200000 byte add: 96 ms 2083333 ops/sec
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200000 byte sub: 9 ms 22222222 ops/sec
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200000 byte mul: 3 ms 66666666 ops/sec
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200000 byte div: 35 ms 5714285 ops/sec
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200000 short add: 116 ms 1724137 ops/sec
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200000 short sub: 2 ms 100000000 ops/sec
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200000 short mul: 1 ms 200000000 ops/sec
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200000 short div: 47 ms 4255319 ops/sec
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200000 char add: 119 ms 1680672 ops/sec
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200000 char sub: 2 ms 100000000 ops/sec
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200000 char mul: 2 ms 100000000 ops/sec
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200000 char div: 41 ms 4878048 ops/sec
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200000 int add: 105 ms 1904761 ops/sec
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200000 int sub: 2 ms 100000000 ops/sec
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200000 int mul: 1 ms 200000000 ops/sec
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200000 int div: 55 ms 3636363 ops/sec
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200000 long add: 108 ms 1851851 ops/sec
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200000 long sub: -1 ms -200000000 ops/sec
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200000 long mul: -2 ms -100000000 ops/sec
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200000 long div: 357 ms 560224 ops/sec
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200000 float add: 238 ms 840336 ops/sec
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200000 float sub: 1 ms 200000000 ops/sec
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200000 float mul: 1 ms 200000000 ops/sec
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200000 float div: 1 ms 200000000 ops/sec
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200000 double add: 315 ms 634920 ops/sec
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200000 double sub: 1 ms 200000000 ops/sec
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200000 double mul: 1 ms 200000000 ops/sec
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200000 double div: 1 ms 200000000 ops/sec
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200000 method calls: 85 ms 2352941 ops/sec
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200000 static method calls: 75 ms 2666666 ops/sec
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2000 string concats: 491 ms 4073 ops/sec
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20000 string compares (easy): 62 ms 322580 ops/sec
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1000 string compares (hard): 3 ms 333333 ops/sec
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20000 object creations: 135 ms 148148 ops/sec
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6242048 Total Loop Executions: 5200 ms 100393 loops/sec
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Note: each Loop Execution includes multiple Java operations
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robot@ev3dev:~$
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```
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## Conclussions:
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After the review of the results, it is clear that it is better to use
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the Oracle JVM for EV3 Brick.
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Juan Antonio

‎build.gradle

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//Gradle file library ev3dev-lang-java // jvm-benchmark
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//Author: Juan Antonio Breña Moral
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version = '0.1.0'
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apply plugin: 'java'
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apply plugin: 'eclipse'
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apply plugin: 'idea'
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repositories {
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mavenCentral()
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maven { url "https://jitpack.io" }
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}
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dependencies {
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testCompile("junit:junit:4.12")
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testCompile("org.hamcrest:hamcrest-all:1.3")
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}
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//Compile
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compileJava {
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sourceCompatibility = 1.8
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targetCompatibility = 1.8
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}
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//Jar
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jar {
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baseName = "${rootProject.name}"
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}
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//Fat Jar
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task fatJar(type: Jar) {
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baseName = "${rootProject.name}" + "-all"
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manifest {
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from file("${projectDir}/src/main/java/META-INF/MANIFEST.MF")
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}
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from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
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with jar
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}
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//Deploy on Brick
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buildscript {
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repositories {
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maven {
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url "https://plugins.gradle.org/m2/"
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}
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}
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dependencies {
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classpath "org.hidetake:gradle-ssh-plugin:2.0.0"
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}
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}
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apply plugin: 'org.hidetake.ssh'
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apply from: 'deploy.gradle'

‎deploy.gradle

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remotes {
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ev3dev {
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host = '192.168.1.206'
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user = 'robot'
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password = 'maker'
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}
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}
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task deploy << {
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ssh.run {
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session(remotes.ev3dev) {
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put from: "./build/libs/" + "${rootProject.name}" + "-all-" + version + ".jar", into: "/home/robot/"
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}
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}
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}
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deploy.dependsOn clean, fatJar
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task remoteRun << {
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ssh.run {
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session(remotes.ev3dev) {
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println "java -server -jar /home/robot/" + "${rootProject.name}" + "-all-" + version + ".jar"
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execute "java -server -jar /home/robot/" + "${rootProject.name}" + "-all-" + version + ".jar"
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}
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}
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}
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task deployAndRun << {
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}
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deployAndRun.dependsOn deploy, remoteRun

‎gradle/wrapper/gradle-wrapper.jar

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‎gradle/wrapper/gradle-wrapper.properties

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#Tue May 16 22:30:42 BST 2017
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distributionBase=GRADLE_USER_HOME
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distributionPath=wrapper/dists
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zipStoreBase=GRADLE_USER_HOME
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zipStorePath=wrapper/dists
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distributionUrl=https\://services.gradle.org/distributions/gradle-2.4-bin.zip

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