edu.rit.smp.fractal

Class MSHistogramSmp3

java.lang.Object

edu.rit.smp.fractal.MSHistogramSmp3

public class MSHistogramSmp3
extends java.lang.Object

Class MSHistogramSmp3 is an SMP parallel program that calculates a histogram of the Mandelbrot Set.

Usage: java -Dpj.nt=K edu.rit.smp.fractal.MSHistogramSmp3 width height xcenter ycenter resolution maxiter outfile
K = Number of parallel threads
width = Image width (pixels)
height = Image height (pixels)
xcenter = X coordinate of center point
ycenter = Y coordinate of center point
resolution = Pixels per unit
maxiter = Maximum number of iterations
outfile = Output file name

The program calculates an iteration count i for each pixel in the same way as the MandelbrotSetSeq program, with 0 <= i <= maxiter. The program prints into the output file a histogram of the i values; that is, for each value of i, how many times that value occurred in the image.

The computation is performed in parallel in multiple threads. The program uses the reduction pattern with a shared reduction variable to accumulate the histogram. The program uses a non-multiple-thread-safe data type for the shared reduction variable along with a critical section to update the reduction variable. The program measures the computation's running time, including the time to print the output.

Method Summary

Modifier and Type	Method and Description
static void	main(java.lang.String[] args) Mandelbrot Set main program.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Mandelbrot Set main program.

Throws:

java.lang.Exception