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// Jacobi iteration on a mesh. Based loosely on a Filaments demo |
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import java.util.concurrent.*; |
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//import jsr166y.*; |
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public class FJJacobi { |
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double[][] a = new double[dim][dim]; |
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double[][] b = new double[dim][dim]; |
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// Initialize interiors to small value |
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double smallVal = 1.0/dim; |
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double smallVal = EPSILON; // 1.0/dim; |
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for (int i = 1; i < dim-1; ++i) { |
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for (int j = 1; j < dim-1; ++j) |
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a[i][j] = smallVal; |
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} |
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int nreps = 3; |
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// Fill all edges with 1's. |
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for (int k = 0; k < dim; ++k) { |
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a[k][0] = 1.0; |
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a[k][n+1] = 1.0; |
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a[0][k] = 1.0; |
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a[n+1][k] = 1.0; |
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b[k][0] = 1.0; |
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b[k][n+1] = 1.0; |
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b[0][k] = 1.0; |
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b[n+1][k] = 1.0; |
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> |
} |
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> |
int nreps = 10; |
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for (int rep = 0; rep < nreps; ++rep) { |
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// Fill all edges with 1's. |
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for (int k = 0; k < dim; ++k) { |
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a[k][0] += 1.0; |
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a[k][n+1] += 1.0; |
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a[0][k] += 1.0; |
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a[n+1][k] += 1.0; |
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} |
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Driver driver = new Driver(a, b, 1, n, 1, n, steps, granularity); |
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long startTime = System.currentTimeMillis(); |
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double secs = ((double)time) / 1000.0; |
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System.out.println("Compute Time: " + secs); |
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System.out.println("Workers: " + fjp.getPoolSize()); |
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System.out.println(fjp); |
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} |
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} |
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if (tryUnfork()) |
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compute(); |
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else { |
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// quietlyJoin(); |
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quietlyHelpJoin(); |
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quietlyJoin(); |
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reinitialize(); |
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} |
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double m = maxDiff; |
