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Comparing jsr166/src/test/loops/SimpleMutexLoops.java (file contents):
Revision 1.3 by dl, Mon Feb 19 00:46:06 2007 UTC vs.
Revision 1.9 by jsr166, Sat Dec 31 19:12:36 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.*;
7 > import java.util.concurrent.CyclicBarrier;
8 > import java.util.concurrent.ExecutorService;
9 > import java.util.concurrent.Executors;
10  
11   public final class SimpleMutexLoops {
12      static final ExecutorService pool = Executors.newCachedThreadPool();
# Line 16 | Line 16 | public final class SimpleMutexLoops {
16  
17      public static void main(String[] args) throws Exception {
18          int maxThreads = 100;
19 <        if (args.length > 0)
19 >        if (args.length > 0)
20              maxThreads = Integer.parseInt(args[0]);
21  
22          new MutexLoop(1).test();
23          new MutexLoop(1).test();
24          print = true;
25  
26 <        int k = 1;
27 <        for (int i = 1; i <= maxThreads;) {
26 >        for (int k = 1, i = 1; i <= maxThreads;) {
27              System.out.print("Threads: " + i);
28              new MutexLoop(i).test();
29              Thread.sleep(100);
30              if (i == k) {
31                  k = i << 1;
32                  i = i + (i >>> 1);
33 <            }
34 <            else
33 >            }
34 >            else
35                  i = k;
36          }
37          pool.shutdown();
# Line 52 | Line 51 | public final class SimpleMutexLoops {
51          }
52  
53          final void test() throws Exception {
54 <            for (int i = 0; i < nthreads; ++i)
54 >            for (int i = 0; i < nthreads; ++i)
55                  pool.execute(this);
56              barrier.await();
57              barrier.await();
58              if (print) {
59                  long time = timer.getTime();
60 <                long tpi = time / ((long)iters * nthreads);
60 >                long tpi = time / ((long) iters * nthreads);
61                  System.out.print("\t" + LoopHelpers.rightJustify(tpi) + " ns per lock");
62 <                double secs = (double)(time) / 1000000000.0;
62 >                double secs = (double) time / 1000000000.0;
63                  System.out.println("\t " + secs + "s run time");
64              }
65  
# Line 72 | Line 71 | public final class SimpleMutexLoops {
71          public final void run() {
72              final Mutex lock = this.lock;
73              try {
74 <                barrier.await();
74 >                barrier.await();
75                  int sum = v + 1;
76                  int x = 0;
77                  int n = iters;
# Line 91 | Line 90 | public final class SimpleMutexLoops {
90                          ++readBarrier;
91                      for (int l = x & 7; l > 0; --l)
92                          sum += LoopHelpers.compute6(sum);
93 <                }
93 >                }
94                  barrier.await();
95                  result += sum;
96              }
97 <            catch (Exception ie) {
98 <                return;
97 >            catch (Exception ie) {
98 >                return;
99              }
100          }
101      }

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