mono/tests/monitor-stress.cs

   1 using System;
   2 using System.Threading;
   3
   4 class T {
   5         static int count = 20000;
   6         static int loops = 80;
   7         static int threads = 10;
   8         static object global_obj;
   9         static void stress_loop () {
  10                 object obj = new object ();
  11                 lock (obj) {
  12                         object [] array = new object [count];
  13                         for (int i = 0; i < count; ++i) {
  14                                 array [i] = new object ();
  15                         }
  16                         for (int i = 0; i < count; ++i) {
  17                                 lock (array [i]) {
  18                                         global_obj = new String ('x', 32);
  19                                         if ((i % 12) == 0) {
  20                                                 array [i] = global_obj;
  21                                         }
  22                                 }
  23                         }
  24                         // again, after a GC
  25                         GC.Collect ();
  26                         for (int i = 0; i < count; ++i) {
  27                                 lock (array [i]) {
  28                                 }
  29                         }
  30                         // two times, with feeling
  31                         for (int i = 0; i < count; ++i) {
  32                                 lock (array [i]) {
  33                                         for (int j = 0; i < count; ++i) {
  34                                                 lock (array [j]) {
  35                                                 }
  36                                         }
  37                                 }
  38                         }
  39                 }
  40         }
  41
  42         static void worker () {
  43                 for (int i = 0; i < loops; ++i)
  44                         stress_loop ();
  45         }
  46         static void Main (string[] args) {
  47                 if (args.Length > 0)
  48                         loops = int.Parse (args [0]);
  49                 if (args.Length > 1)
  50                         count = int.Parse (args [1]);
  51                 if (args.Length > 1)
  52                         threads = int.Parse (args [2]);
  53                 for (int i = 0; i < threads; ++i) {
  54                         Thread t = new Thread (new ThreadStart (worker));
  55                         t.Start ();
  56                 }
  57                 /* for good measure */
  58                 worker ();
  59         }
  60 }