mono/tests/sgen-cementing-stress.cs

   1 using System;
   2
   3 class PinList
   4 {
   5     class Pinned
   6     {
   7         public Pinned ()
   8         {
   9         }
  10     }
  11
  12     Pinned reference;
  13     PinList next;
  14
  15     PinList (PinList n)
  16     {
  17         next = n;
  18     }
  19
  20     static int list_size = 0;
  21
  22     static PinList MakeList (int length)
  23     {
  24         PinList l = null;
  25         for (int i = 0; i < length; ++i)
  26             l = new PinList (l);
  27         return l;
  28     }
  29
  30     static void AssignReferences (PinList l, Pinned[] objs)
  31     {
  32         int i = 0;
  33         int n = objs.Length;
  34         while (l != null)
  35         {
  36             l.reference = objs [i++ % n];
  37             l = l.next;
  38         }
  39     }
  40
  41     static Pinned Work (PinList list, Pinned[] objs, int i)
  42     {
  43         if (i >= objs.Length)
  44         {
  45             for (int j = 0; j < 10; ++j)
  46             {
  47                 MakeList (list_size >> 5);
  48                 AssignReferences (list, objs);
  49             }
  50             return null;
  51         }
  52         else
  53         {
  54             Pinned obj = new Pinned ();
  55             objs [i] = obj;
  56             Pinned dummy = Work (list, objs, i + 1);
  57             return obj != dummy ? obj : dummy; // to keep obj alive
  58         }
  59     }
  60
  61     static void Benchmark (PinList list, int n)
  62     {
  63         Pinned[] objs = new Pinned [n];
  64         Work (list, objs, 0);
  65     }
  66
  67     public static void Main ()
  68     {
  69         list_size = 1 << 15;
  70         TestTimeout timeout = TestTimeout.Start(TimeSpan.FromSeconds(TestTimeout.IsStressTest ? 60 : 5));
  71
  72         for (int it1 = 1; it1 <= 10; it1++, list_size <<= 1) {
  73                 PinList list = MakeList (list_size);
  74                 Console.WriteLine ("long list constructed {0}", it1);
  75                 for (int it2 = 0; it2 < 5; it2++) {
  76                         Benchmark (list, 10 * it1);
  77                         GC.Collect (1);
  78
  79                         if (!timeout.HaveTimeLeft)
  80                                 return;
  81                 }
  82         }
  83     }
  84 }