Iterative Averaging

Motivation

X10/Habanero like Phasers have been added to Java since JDK7. We will gain some experience with using Phasers in a parallel for loop context.

Background

Phaser Javadoc

Guide to the Java Phaser

Mistakes To Avoid

Warning: Phasers are brittle.

Code to Implement

class:	ForForallIterativeAverager.java
methods:	iterativelyAverage
package:	iterativeaveraging.studio
source folder:	student/src/main/java

method: public void iterativelyAverage(List<Slice<double[]>> slices, double[] a, double[] b, int iterationCount) (parallel implementation required)

class:	ForallForPhasedIterativeAverager.java
methods:	iterativelyAverage
package:	iterativeaveraging.studio
source folder:	student/src/main/java

method: public void iterativelyAverage(List<Slice<double[]>> slices, double[] a, double[] b, int iterationCount) (parallel implementation required)

Testing Your Solution

Correctness

class:	IterativeAveragingTestSuite.java
package:	iterativeaveraging.studio
source folder:	testing/src/test/java

Performance

class:	IterativeAveragingTiming.java
package:	iterativeaveraging.studio
source folder:	src/main/java