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root/jsr166/jsr166/src/test/loops/NoopSpinLockLoops.java
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Comparing jsr166/src/test/loops/NoopSpinLockLoops.java (file contents):
Revision 1.3 by jsr166, Thu Oct 29 23:09:07 2009 UTC vs.
Revision 1.9 by jsr166, Sat Dec 31 18:54:28 2016 UTC

# Line 1 | Line 1
1   /*
2   * Written by Doug Lea with assistance from members of JCP JSR-166
3   * Expert Group and released to the public domain, as explained at
4 < * http://creativecommons.org/licenses/publicdomain
4 > * http://creativecommons.org/publicdomain/zero/1.0/
5   */
6  
7 < import java.util.concurrent.*;
8 < import java.util.concurrent.locks.*;
9 < import java.util.concurrent.atomic.*;
10 < import java.util.*;
7 > import java.util.concurrent.Callable;
8 > import java.util.concurrent.CyclicBarrier;
9 > import java.util.concurrent.ExecutorService;
10 > import java.util.concurrent.Executors;
11 > import java.util.concurrent.atomic.AtomicInteger;
12  
13   public final class NoopSpinLockLoops {
14      static final ExecutorService pool = Executors.newCachedThreadPool();
# Line 24 | Line 25 | public final class NoopSpinLockLoops {
25          new ReentrantLockLoop(1).test();
26          print = true;
27  
28 <        int k = 1;
28 <        for (int i = 1; i <= maxThreads;) {
28 >        for (int k = 1, i = 1; i <= maxThreads;) {
29              System.out.print("Threads: " + i);
30              new ReentrantLockLoop(i).test();
31              Thread.sleep(100);
# Line 59 | Line 59 | public final class NoopSpinLockLoops {
59              barrier.await();
60              if (print) {
61                  long time = timer.getTime();
62 <                long tpi = time / ((long)iters * nthreads);
62 >                long tpi = time / ((long) iters * nthreads);
63                  System.out.print("\t" + LoopHelpers.rightJustify(tpi) + " ns per lock");
64 <                double secs = (double)(time) / 1000000000.0;
64 >                double secs = (double) time / 1000000000.0;
65                  System.out.println("\t " + secs + "s run time");
66              }
67  
# Line 78 | Line 78 | public final class NoopSpinLockLoops {
78                  int x = sum + 1;
79                  int n = iters;
80                  while (n-- > 0) {
81 <                    while (!lock.compareAndSet(0, 1)) ;
81 >                    do {} while (!lock.compareAndSet(0, 1));
82                      x = LoopHelpers.compute4(x);
83                      lock.set(0);
84                      if ((x += readBarrier) == 0)

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