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/* |
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* Written by Bill Scherer and Doug Lea with assistance from members |
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* of JCP JSR-166 Expert Group and released to the public domain. Use, |
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* modify, and redistribute this code in any way without |
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* acknowledgement. |
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* of JCP JSR-166 Expert Group and released to the public domain, as |
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* explained at http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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import java.util.concurrent.*; |
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static final int NCPUS = Runtime.getRuntime().availableProcessors(); |
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static final int DEFAULT_THREADS = NCPUS + 2; |
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static final long DEFAULT_TRIAL_MILLIS = 10000; |
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static final long DEFAULT_TRIAL_MILLIS = 10000; |
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public static void main(String[] args) throws Exception { |
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int maxThreads = DEFAULT_THREADS; |
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trialMillis = Integer.parseInt(args[argc]); |
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else if (option.equals("-r")) |
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nReps = Integer.parseInt(args[argc]); |
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else |
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else |
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maxThreads = Integer.parseInt(option); |
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argc++; |
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} |
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// Display runtime parameters |
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System.out.print("ExchangeTest"); |
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System.out.print(" -t " + trialMillis); |
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// Display runtime parameters |
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System.out.print("ExchangeTest"); |
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System.out.print(" -t " + trialMillis); |
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System.out.print(" -r " + nReps); |
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System.out.print(" max threads " + maxThreads); |
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System.out.println(); |
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System.out.print(" max threads " + maxThreads); |
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System.out.println(); |
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long warmupTime = 2000; |
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long sleepTime = 100; |
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int nw = maxThreads >= 3? 3 : 2; |
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int nw = (maxThreads >= 3) ? 3 : 2; |
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System.out.println("Warmups.."); |
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oneRun(3, warmupTime); |
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Thread.sleep(sleepTime); |
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} |
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} |
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static void oneRun(int nThreads, long trialMillis) throws Exception { |
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System.out.printf("%4d threads", nThreads); |
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System.out.printf("%9dms", trialMillis); |
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Exchanger x = new Exchanger(); |
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Runner[] runners = new Runner[nThreads]; |
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Thread[] threads = new Thread[nThreads]; |
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threads[i].start(); |
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} |
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Thread.sleep(trialMillis); |
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for (int i = 0; i < nThreads; ++i) |
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for (int i = 0; i < nThreads; ++i) |
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threads[i].interrupt(); |
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long elapsed = System.nanoTime() - startTime; |
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for (int i = 0; i < nThreads; ++i) |
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for (int i = 0; i < nThreads; ++i) |
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threads[i].join(); |
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int iters = 1; |
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// System.out.println(); |
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} |
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long rate = iters * 1000L * 1000L * 1000L / elapsed; |
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long npt = elapsed / iters; |
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System.out.printf("%9dms", elapsed / (1000L * 1000L)); |
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System.out.printf("%9d it/s ", rate); |
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System.out.printf("%9d ns/it", npt); |
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System.out.println(); |
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// x.printStats(); |
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} |
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static final class Runner implements Runnable { |
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final Exchanger exchanger; |
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final Object mine = new Integer(2688); |
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} |
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} |
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} |
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