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* http://creativecommons.org/licenses/publicdomain |
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*/ |
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– |
//import jsr166y.*; |
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import java.util.concurrent.*; |
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/** |
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static final int calls = 263479047; |
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|
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public static void main(String[] args) throws Exception { |
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< |
int procs = Runtime.getRuntime().availableProcessors(); |
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> |
int procs = 0; |
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|
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try { |
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if (args.length > 0) |
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System.out.println("Usage: java Integrate3 threads <s[erial] | d[ynamic] | f[ork] - default d>"); |
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return; |
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} |
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+ |
oneTest(procs); |
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oneTest(procs); |
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oneTest(procs); |
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+ |
} |
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|
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< |
ForkJoinPool g = new ForkJoinPool(procs); |
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> |
static void oneTest(int procs) { |
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> |
ForkJoinPool g = procs == 0? new ForkJoinPool() : |
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> |
new ForkJoinPool(procs); |
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> |
System.out.println("Number of procs=" + g.getParallelism()); |
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System.out.println("Integrating from " + start + " to " + end + |
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" forkPolicy = " + forkArg); |
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long lastTime = System.nanoTime(); |
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< |
for (int i = 0; i < 10; ++i) { |
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> |
for (int i = 0; i < 20; ++i) { |
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double a; |
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if (forkPolicy == SERIAL) |
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a = SQuad.computeArea(g, start, end); |
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lastTime = now; |
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System.out.printf("Calls/sec: %12d", (long) (calls / s)); |
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System.out.printf(" Time: %7.3f", s); |
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< |
System.out.printf(" Area: %12.1f", a); |
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> |
System.out.printf(" Threads: %5d", g.getPoolSize()); |
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> |
// System.out.printf(" Area: %12.1f", a); |
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System.out.println(); |
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} |
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System.out.println(g); |
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q.fork(); |
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ar = recEval(c, r, fc, fr, ar); |
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if (!q.tryUnfork()) { |
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< |
q.quietlyHelpJoin(); |
172 |
> |
// q.quietlyHelpJoin(); |
173 |
> |
q.quietlyJoin(); |
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return ar + q.area; |
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} |
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return ar + recEval(l, c, fl, fc, al); |
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(q = new DQuad(l, c, al)).fork(); |
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ar = recEval(c, r, fc, fr, ar); |
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if (q != null && !q.tryUnfork()) { |
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< |
q.quietlyHelpJoin(); |
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> |
// q.quietlyHelpJoin(); |
222 |
> |
q.quietlyJoin(); |
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return ar + q.area; |
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} |
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return ar + recEval(l, c, fl, fc, al); |